remote.c 60 KB
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/*
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 * Copyright (C) the libgit2 contributors. All rights reserved.
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 *
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 * This file is part of libgit2, distributed under the GNU GPL v2 with
 * a Linking Exception. For full terms see the included COPYING file.
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 */

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#include "remote.h"

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#include "git2/config.h"
#include "git2/types.h"
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#include "git2/oid.h"
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#include "git2/net.h"
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#include "config.h"
#include "repository.h"
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#include "fetch.h"
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#include "refs.h"
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#include "refspec.h"
#include "fetchhead.h"
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#include "push.h"
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#define CONFIG_URL_FMT "remote.%s.url"
#define CONFIG_PUSHURL_FMT "remote.%s.pushurl"
#define CONFIG_FETCH_FMT "remote.%s.fetch"
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#define CONFIG_PUSH_FMT "remote.%s.push"
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#define CONFIG_TAGOPT_FMT "remote.%s.tagopt"
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static int dwim_refspecs(git_vector *out, git_vector *refspecs, git_vector *refs);
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static int lookup_remote_prune_config(git_remote *remote, git_config *config, const char *name);
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char *apply_insteadof(git_config *config, const char *url, int direction);
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static int add_refspec_to(git_vector *vector, const char *string, bool is_fetch)
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{
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	git_refspec *spec;
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	spec = git__calloc(1, sizeof(git_refspec));
	GITERR_CHECK_ALLOC(spec);

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	if (git_refspec__parse(spec, string, is_fetch) < 0) {
		git__free(spec);
		return -1;
	}
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	spec->push = !is_fetch;
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	if (git_vector_insert(vector, spec) < 0) {
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		git_refspec__free(spec);
		git__free(spec);
		return -1;
	}
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	return 0;
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}

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static int add_refspec(git_remote *remote, const char *string, bool is_fetch)
{
	return add_refspec_to(&remote->refspecs, string, is_fetch);
}

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static int download_tags_value(git_remote *remote, git_config *cfg)
{
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	git_config_entry *ce;
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	git_buf buf = GIT_BUF_INIT;
	int error;

	if (git_buf_printf(&buf, "remote.%s.tagopt", remote->name) < 0)
		return -1;

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	error = git_config__lookup_entry(&ce, cfg, git_buf_cstr(&buf), false);
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	git_buf_free(&buf);

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	if (!error && ce && ce->value) {
		if (!strcmp(ce->value, "--no-tags"))
			remote->download_tags = GIT_REMOTE_DOWNLOAD_TAGS_NONE;
		else if (!strcmp(ce->value, "--tags"))
			remote->download_tags = GIT_REMOTE_DOWNLOAD_TAGS_ALL;
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	}
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	git_config_entry_free(ce);
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	return error;
}

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static int ensure_remote_name_is_valid(const char *name)
{
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	int error = 0;
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	if (!git_remote_is_valid_name(name)) {
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		giterr_set(
			GITERR_CONFIG,
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			"'%s' is not a valid remote name.", name ? name : "(null)");
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		error = GIT_EINVALIDSPEC;
	}

	return error;
}

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static int write_add_refspec(git_repository *repo, const char *name, const char *refspec, bool fetch)
{
	git_config *cfg;
	git_buf var = GIT_BUF_INIT;
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	git_refspec spec;
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	const char *fmt;
	int error;

	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
	    return error;

	fmt = fetch ? CONFIG_FETCH_FMT : CONFIG_PUSH_FMT;

	if ((error = ensure_remote_name_is_valid(name)) < 0)
		return error;

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	if ((error = git_refspec__parse(&spec, refspec, fetch)) < 0) {
		if (giterr_last()->klass != GITERR_NOMEMORY)
			error = GIT_EINVALIDSPEC;

		return error;
	}

	git_refspec__free(&spec);

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	if ((error = git_buf_printf(&var, fmt, name)) < 0)
		return error;

	/*
	 * "$^" is a unmatcheable regexp: it will not match anything at all, so
	 * all values will be considered new and we will not replace any
	 * present value.
	 */
	if ((error = git_config_set_multivar(cfg, var.ptr, "$^", refspec)) < 0) {
		goto cleanup;
	}

cleanup:
	git_buf_free(&var);
	return 0;
}

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#if 0
/* We could export this as a helper */
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static int get_check_cert(int *out, git_repository *repo)
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{
	git_config *cfg;
	const char *val;
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	int error = 0;

	assert(out && repo);
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	/* By default, we *DO* want to verify the certificate. */
	*out = 1;
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	/* Go through the possible sources for SSL verification settings, from
	 * most specific to least specific. */

	/* GIT_SSL_NO_VERIFY environment variable */
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	if ((val = p_getenv("GIT_SSL_NO_VERIFY")) != NULL)
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		return git_config_parse_bool(out, val);
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	/* http.sslVerify config setting */
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	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
		return error;
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	*out = git_config__get_bool_force(cfg, "http.sslverify", 1);
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	return 0;
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}
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#endif
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static int canonicalize_url(git_buf *out, const char *in)
{
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	if (in == NULL || strlen(in) == 0) {
		giterr_set(GITERR_INVALID, "cannot set empty URL");
		return GIT_EINVALIDSPEC;
	}
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#ifdef GIT_WIN32
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	/* Given a UNC path like \\server\path, we need to convert this
	 * to //server/path for compatibility with core git.
	 */
	if (in[0] == '\\' && in[1] == '\\' &&
		(git__isalpha(in[2]) || git__isdigit(in[2]))) {
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		const char *c;
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		for (c = in; *c; c++)
			git_buf_putc(out, *c == '\\' ? '/' : *c);

		return git_buf_oom(out) ? -1 : 0;
	}
#endif

	return git_buf_puts(out, in);
}

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static int create_internal(git_remote **out, git_repository *repo, const char *name, const char *url, const char *fetch)
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{
	git_remote *remote;
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	git_config *config_ro = NULL, *config_rw;
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	git_buf canonical_url = GIT_BUF_INIT;
	git_buf var = GIT_BUF_INIT;
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	int error = -1;
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	/* repo, name, and fetch are optional */
	assert(out && url);
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	if (repo && (error = git_repository_config_snapshot(&config_ro, repo)) < 0)
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		return error;

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	remote = git__calloc(1, sizeof(git_remote));
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	GITERR_CHECK_ALLOC(remote);
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	remote->repo = repo;
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	if ((error = git_vector_init(&remote->refs, 32, NULL)) < 0 ||
		(error = canonicalize_url(&canonical_url, url)) < 0)
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		goto on_error;
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	if (repo) {
		remote->url = apply_insteadof(config_ro, canonical_url.ptr, GIT_DIRECTION_FETCH);
	} else {
		remote->url = git__strdup(canonical_url.ptr);
	}
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	GITERR_CHECK_ALLOC(remote->url);
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	if (name != NULL) {
		remote->name = git__strdup(name);
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		GITERR_CHECK_ALLOC(remote->name);
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		if ((error = git_buf_printf(&var, CONFIG_URL_FMT, name)) < 0)
			goto on_error;

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		if (repo &&
			((error = git_repository_config__weakptr(&config_rw, repo)) < 0 ||
			(error = git_config_set_string(config_rw, var.ptr, canonical_url.ptr)) < 0))
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			goto on_error;
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	}

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	if (fetch != NULL) {
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		if ((error = add_refspec(remote, fetch, true)) < 0)
			goto on_error;

		/* only write for non-anonymous remotes */
		if (name && (error = write_add_refspec(repo, name, fetch, true)) < 0)
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			goto on_error;
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		if (repo && (error = lookup_remote_prune_config(remote, config_ro, name)) < 0)
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			goto on_error;

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		/* Move the data over to where the matching functions can find them */
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		if ((error = dwim_refspecs(&remote->active_refspecs, &remote->refspecs, &remote->refs)) < 0)
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			goto on_error;
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	}

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	/* A remote without a name doesn't download tags */
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	if (!name)
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		remote->download_tags = GIT_REMOTE_DOWNLOAD_TAGS_NONE;
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	else
		remote->download_tags = GIT_REMOTE_DOWNLOAD_TAGS_AUTO;

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	git_buf_free(&var);

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	*out = remote;
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	error = 0;
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on_error:
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	if (error)
		git_remote_free(remote);

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	git_config_free(config_ro);
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	git_buf_free(&canonical_url);
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	git_buf_free(&var);
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	return error;
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}

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static int ensure_remote_doesnot_exist(git_repository *repo, const char *name)
{
	int error;
	git_remote *remote;

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	error = git_remote_lookup(&remote, repo, name);
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	if (error == GIT_ENOTFOUND)
		return 0;

	if (error < 0)
		return error;

	git_remote_free(remote);

	giterr_set(
		GITERR_CONFIG,
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		"remote '%s' already exists", name);
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	return GIT_EEXISTS;
}

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int git_remote_create(git_remote **out, git_repository *repo, const char *name, const char *url)
{
	git_buf buf = GIT_BUF_INIT;
	int error;

	if (git_buf_printf(&buf, "+refs/heads/*:refs/remotes/%s/*", name) < 0)
		return -1;

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	error = git_remote_create_with_fetchspec(out, repo, name, url, git_buf_cstr(&buf));
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	git_buf_free(&buf);

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	return error;
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}

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int git_remote_create_with_fetchspec(git_remote **out, git_repository *repo, const char *name, const char *url, const char *fetch)
{
	git_remote *remote = NULL;
	int error;

	if ((error = ensure_remote_name_is_valid(name)) < 0)
		return error;

	if ((error = ensure_remote_doesnot_exist(repo, name)) < 0)
		return error;
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	if (create_internal(&remote, repo, name, url, fetch) < 0)
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		goto on_error;

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	*out = remote;

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	return 0;

on_error:
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	git_remote_free(remote);
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	return -1;
}

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int git_remote_create_anonymous(git_remote **out, git_repository *repo, const char *url)
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{
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	return create_internal(out, repo, NULL, url, NULL);
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}

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int git_remote_create_detached(git_remote **out, const char *url)
{
	return create_internal(out, NULL, NULL, url, NULL);
}

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int git_remote_dup(git_remote **dest, git_remote *source)
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{
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	size_t i;
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	int error = 0;
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	git_refspec *spec;
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	git_remote *remote = git__calloc(1, sizeof(git_remote));
	GITERR_CHECK_ALLOC(remote);

	if (source->name != NULL) {
		remote->name = git__strdup(source->name);
		GITERR_CHECK_ALLOC(remote->name);
	}

	if (source->url != NULL) {
		remote->url = git__strdup(source->url);
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		GITERR_CHECK_ALLOC(remote->url);
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	}

	if (source->pushurl != NULL) {
		remote->pushurl = git__strdup(source->pushurl);
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		GITERR_CHECK_ALLOC(remote->pushurl);
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	}

	remote->repo = source->repo;
	remote->download_tags = source->download_tags;
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	remote->prune_refs = source->prune_refs;
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	if (git_vector_init(&remote->refs, 32, NULL) < 0 ||
	    git_vector_init(&remote->refspecs, 2, NULL) < 0 ||
	    git_vector_init(&remote->active_refspecs, 2, NULL) < 0) {
		error = -1;
		goto cleanup;
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	}

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	git_vector_foreach(&source->refspecs, i, spec) {
		if ((error = add_refspec(remote, spec->string, !spec->push)) < 0)
			goto cleanup;
	}
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	*dest = remote;

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cleanup:

	if (error < 0)
		git__free(remote);

	return error;
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}

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struct refspec_cb_data {
	git_remote *remote;
	int fetch;
};

static int refspec_cb(const git_config_entry *entry, void *payload)
{
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	struct refspec_cb_data *data = (struct refspec_cb_data *)payload;
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	return add_refspec(data->remote, entry->value, data->fetch);
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}

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static int get_optional_config(
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	bool *found, git_config *config, git_buf *buf,
	git_config_foreach_cb cb, void *payload)
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{
	int error = 0;
	const char *key = git_buf_cstr(buf);

	if (git_buf_oom(buf))
		return -1;

	if (cb != NULL)
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		error = git_config_get_multivar_foreach(config, key, NULL, cb, payload);
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	else
		error = git_config_get_string(payload, config, key);

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	if (found)
		*found = !error;

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	if (error == GIT_ENOTFOUND) {
		giterr_clear();
		error = 0;
	}

	return error;
}

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int git_remote_lookup(git_remote **out, git_repository *repo, const char *name)
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{
	git_remote *remote;
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	git_buf buf = GIT_BUF_INIT;
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	const char *val;
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	int error = 0;
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	git_config *config;
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	struct refspec_cb_data data = { NULL };
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	bool optional_setting_found = false, found;
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	assert(out && repo && name);

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	if ((error = ensure_remote_name_is_valid(name)) < 0)
		return error;

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	if ((error = git_repository_config_snapshot(&config, repo)) < 0)
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		return error;
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	remote = git__calloc(1, sizeof(git_remote));
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	GITERR_CHECK_ALLOC(remote);
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	remote->name = git__strdup(name);
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	GITERR_CHECK_ALLOC(remote->name);
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	if (git_vector_init(&remote->refs, 32, NULL) < 0 ||
	    git_vector_init(&remote->refspecs, 2, NULL) < 0 ||
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	    git_vector_init(&remote->passive_refspecs, 2, NULL) < 0 ||
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	    git_vector_init(&remote->active_refspecs, 2, NULL) < 0) {
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		error = -1;
		goto cleanup;
	}
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	if ((error = git_buf_printf(&buf, "remote.%s.url", name)) < 0)
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		goto cleanup;
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	if ((error = get_optional_config(&found, config, &buf, NULL, (void *)&val)) < 0)
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		goto cleanup;
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	optional_setting_found |= found;

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	remote->repo = repo;
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	remote->download_tags = GIT_REMOTE_DOWNLOAD_TAGS_AUTO;
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	if (found && strlen(val) > 0) {
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		remote->url = apply_insteadof(config, val, GIT_DIRECTION_FETCH);
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		GITERR_CHECK_ALLOC(remote->url);
	}
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	val = NULL;
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	git_buf_clear(&buf);
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	git_buf_printf(&buf, "remote.%s.pushurl", name);
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	if ((error = get_optional_config(&found, config, &buf, NULL, (void *)&val)) < 0)
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		goto cleanup;

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	optional_setting_found |= found;

	if (!optional_setting_found) {
		error = GIT_ENOTFOUND;
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		giterr_set(GITERR_CONFIG, "remote '%s' does not exist", name);
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		goto cleanup;
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	}
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	if (found && strlen(val) > 0) {
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		remote->pushurl = apply_insteadof(config, val, GIT_DIRECTION_PUSH);
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		GITERR_CHECK_ALLOC(remote->pushurl);
	}

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	data.remote = remote;
	data.fetch = true;
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	git_buf_clear(&buf);
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	git_buf_printf(&buf, "remote.%s.fetch", name);

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	if ((error = get_optional_config(NULL, config, &buf, refspec_cb, &data)) < 0)
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		goto cleanup;
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	data.fetch = false;
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	git_buf_clear(&buf);
	git_buf_printf(&buf, "remote.%s.push", name);
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	if ((error = get_optional_config(NULL, config, &buf, refspec_cb, &data)) < 0)
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		goto cleanup;

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	if (download_tags_value(remote, config) < 0)
		goto cleanup;

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	if ((error = lookup_remote_prune_config(remote, config, name)) < 0)
		goto cleanup;

	/* Move the data over to where the matching functions can find them */
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	if ((error = dwim_refspecs(&remote->active_refspecs, &remote->refspecs, &remote->refs)) < 0)
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		goto cleanup;

	*out = remote;

cleanup:
	git_config_free(config);
	git_buf_free(&buf);

	if (error < 0)
		git_remote_free(remote);

	return error;
}

static int lookup_remote_prune_config(git_remote *remote, git_config *config, const char *name)
{
	git_buf buf = GIT_BUF_INIT;
	int error = 0;

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	git_buf_printf(&buf, "remote.%s.prune", name);

	if ((error = git_config_get_bool(&remote->prune_refs, config, git_buf_cstr(&buf))) < 0) {
		if (error == GIT_ENOTFOUND) {
			giterr_clear();

			if ((error = git_config_get_bool(&remote->prune_refs, config, "fetch.prune")) < 0) {
				if (error == GIT_ENOTFOUND) {
					giterr_clear();
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					error = 0;
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				}
			}
		}
	}

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	git_buf_free(&buf);
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	return error;
}

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const char *git_remote_name(const git_remote *remote)
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{
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	assert(remote);
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	return remote->name;
}

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git_repository *git_remote_owner(const git_remote *remote)
{
	assert(remote);
	return remote->repo;
}

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const char *git_remote_url(const git_remote *remote)
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{
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	assert(remote);
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	return remote->url;
}

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static int set_url(git_repository *repo, const char *remote, const char *pattern, const char *url)
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{
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	git_config *cfg;
	git_buf buf = GIT_BUF_INIT, canonical_url = GIT_BUF_INIT;
	int error;
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	assert(repo && remote);
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	if ((error = ensure_remote_name_is_valid(remote)) < 0)
		return error;

	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
		return error;

	if ((error = git_buf_printf(&buf, pattern, remote)) < 0)
		return error;

	if (url) {
		if ((error = canonicalize_url(&canonical_url, url)) < 0)
			goto cleanup;

		error = git_config_set_string(cfg, buf.ptr, url);
	} else {
		error = git_config_delete_entry(cfg, buf.ptr);
	}

cleanup:
	git_buf_free(&canonical_url);
	git_buf_free(&buf);

	return error;
}

int git_remote_set_url(git_repository *repo, const char *remote, const char *url)
{
	return set_url(repo, remote, CONFIG_URL_FMT, url);
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}

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const char *git_remote_pushurl(const git_remote *remote)
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{
	assert(remote);
	return remote->pushurl;
}

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int git_remote_set_pushurl(git_repository *repo, const char *remote, const char* url)
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{
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	return set_url(repo, remote, CONFIG_PUSHURL_FMT, url);
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}

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const char* git_remote__urlfordirection(git_remote *remote, int direction)
{
	assert(remote);

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	assert(direction == GIT_DIRECTION_FETCH || direction == GIT_DIRECTION_PUSH);

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	if (direction == GIT_DIRECTION_FETCH) {
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		return remote->url;
	}

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	if (direction == GIT_DIRECTION_PUSH) {
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		return remote->pushurl ? remote->pushurl : remote->url;
	}

	return NULL;
}

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int set_transport_callbacks(git_transport *t, const git_remote_callbacks *cbs)
{
	if (!t->set_callbacks || !cbs)
		return 0;

	return t->set_callbacks(t, cbs->sideband_progress, NULL,
				cbs->certificate_check, cbs->payload);
}

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static int set_transport_custom_headers(git_transport *t, const git_strarray *custom_headers)
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{
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	if (!t->set_custom_headers)
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		return 0;

	return t->set_custom_headers(t, custom_headers);
}

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int git_remote_connect(git_remote *remote, git_direction direction, const git_remote_callbacks *callbacks, const git_proxy_options *proxy, const git_strarray *custom_headers)
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{
	git_transport *t;
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	const char *url;
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	int flags = GIT_TRANSPORTFLAGS_NONE;
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	int error;
666
	void *payload = NULL;
667 668
	git_cred_acquire_cb credentials = NULL;
	git_transport_cb transport = NULL;
669

670 671
	assert(remote);

672 673 674
	if (callbacks) {
		GITERR_CHECK_VERSION(callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		credentials = callbacks->credentials;
675
		transport   = callbacks->transport;
676 677 678
		payload     = callbacks->payload;
	}

679 680 681
	if (proxy)
		GITERR_CHECK_VERSION(proxy, GIT_PROXY_OPTIONS_VERSION, "git_proxy_options");

682 683
	t = remote->transport;

684
	url = git_remote__urlfordirection(remote, direction);
685
	if (url == NULL) {
686
		giterr_set(GITERR_INVALID,
687 688 689
			"Malformed remote '%s' - missing %s URL",
			remote->name ? remote->name : "(anonymous)",
			direction == GIT_DIRECTION_FETCH ? "fetch" : "push");
690
		return -1;
691
	}
692

693 694
	/* If we don't have a transport object yet, and the caller specified a
	 * custom transport factory, use that */
695 696
	if (!t && transport &&
		(error = transport(&t, remote, payload)) < 0)
697 698 699 700
		return error;

	/* If we still don't have a transport, then use the global
	 * transport registrations which map URI schemes to transport factories */
701 702
	if (!t && (error = git_transport_new(&t, remote, url)) < 0)
		return error;
703

704 705 706
	if ((error = set_transport_custom_headers(t, custom_headers)) != 0)
		goto on_error;

707
	if ((error = set_transport_callbacks(t, callbacks)) < 0 ||
708
	    (error = t->connect(t, url, credentials, payload, proxy, direction, flags)) != 0)
709
		goto on_error;
710 711 712

	remote->transport = t;

713
	return 0;
714

715 716
on_error:
	t->free(t);
717 718 719 720

	if (t == remote->transport)
		remote->transport = NULL;

721
	return error;
722 723
}

724
int git_remote_ls(const git_remote_head ***out, size_t *size, git_remote *remote)
725
{
726 727
	assert(remote);

728
	if (!remote->transport) {
729
		giterr_set(GITERR_NET, "this remote has never connected");
730 731 732
		return -1;
	}

733
	return remote->transport->ls(out, size, remote->transport);
734 735
}

736 737 738
int git_remote__get_http_proxy(git_remote *remote, bool use_ssl, char **proxy_url)
{
	git_config *cfg;
739
	git_config_entry *ce = NULL;
740
	git_buf val = GIT_BUF_INIT;
741
	int error;
742 743 744

	assert(remote);

745
	if (!proxy_url || !remote->repo)
746 747 748 749
		return -1;

	*proxy_url = NULL;

750 751
	if ((error = git_repository_config__weakptr(&cfg, remote->repo)) < 0)
		return error;
752 753 754 755 756

	/* Go through the possible sources for proxy configuration, from most specific
	 * to least specific. */

	/* remote.<name>.proxy config setting */
757
	if (remote->name && remote->name[0]) {
758 759
		git_buf buf = GIT_BUF_INIT;

760 761
		if ((error = git_buf_printf(&buf, "remote.%s.proxy", remote->name)) < 0)
			return error;
762

763 764
		error = git_config__lookup_entry(&ce, cfg, git_buf_cstr(&buf), false);
		git_buf_free(&buf);
765

766
		if (error < 0)
767
			return error;
768

769
		if (ce && ce->value) {
770
			*proxy_url = git__strdup(ce->value);
771 772
			goto found;
		}
773 774 775
	}

	/* http.proxy config setting */
776
	if ((error = git_config__lookup_entry(&ce, cfg, "http.proxy", false)) < 0)
777
		return error;
778

779
	if (ce && ce->value) {
780
		*proxy_url = git__strdup(ce->value);
781 782
		goto found;
	}
783

784 785
	/* http_proxy / https_proxy environment variables */
	error = git__getenv(&val, use_ssl ? "https_proxy" : "http_proxy");
786

787 788
	/* try uppercase environment variables */
	if (error == GIT_ENOTFOUND)
789
		error = git__getenv(&val, use_ssl ? "HTTPS_PROXY" : "HTTP_PROXY");
790 791

	if (error < 0) {
792 793 794 795 796 797
		if (error == GIT_ENOTFOUND) {
			giterr_clear();
			error = 0;
		}

		return error;
798
	}
799 800 801 802 803

	*proxy_url = git_buf_detach(&val);

found:
	GITERR_CHECK_ALLOC(*proxy_url);
804
	git_config_entry_free(ce);
805 806 807 808

	return 0;
}

809 810
/* DWIM `refspecs` based on `refs` and append the output to `out` */
static int dwim_refspecs(git_vector *out, git_vector *refspecs, git_vector *refs)
811
{
812
	size_t i;
813 814 815
	git_refspec *spec;

	git_vector_foreach(refspecs, i, spec) {
816 817 818
		if (git_refspec__dwim_one(out, spec, refs) < 0)
			return -1;
	}
819

820 821
	return 0;
}
822

823 824 825 826
static void free_refspecs(git_vector *vec)
{
	size_t i;
	git_refspec *spec;
827

828 829 830
	git_vector_foreach(vec, i, spec) {
		git_refspec__free(spec);
		git__free(spec);
831 832
	}

833
	git_vector_clear(vec);
834 835 836 837 838 839 840 841 842 843
}

static int remote_head_cmp(const void *_a, const void *_b)
{
	const git_remote_head *a = (git_remote_head *) _a;
	const git_remote_head *b = (git_remote_head *) _b;

	return git__strcmp_cb(a->name, b->name);
}

844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862
static int ls_to_vector(git_vector *out, git_remote *remote)
{
	git_remote_head **heads;
	size_t heads_len, i;

	if (git_remote_ls((const git_remote_head ***)&heads, &heads_len, remote) < 0)
		return -1;

	if (git_vector_init(out, heads_len, remote_head_cmp) < 0)
		return -1;

	for (i = 0; i < heads_len; i++) {
		if (git_vector_insert(out, heads[i]) < 0)
			return -1;
	}

	return 0;
}

863
int git_remote_download(git_remote *remote, const git_strarray *refspecs, const git_fetch_options *opts)
864
{
865
	int error = -1;
866
	size_t i;
867
	git_vector *to_active, specs = GIT_VECTOR_INIT, refs = GIT_VECTOR_INIT;
868
	const git_remote_callbacks *cbs = NULL;
869
	const git_strarray *custom_headers = NULL;
870
	const git_proxy_options *proxy = NULL;
871

872
	assert(remote);
873

874 875 876 877 878
	if (!remote->repo) {
		giterr_set(GITERR_INVALID, "cannot download detached remote");
		return -1;
	}

879 880 881
	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
882
		custom_headers = &opts->custom_headers;
883 884
		GITERR_CHECK_VERSION(&opts->proxy_opts, GIT_PROXY_OPTIONS_VERSION, "git_proxy_options");
		proxy = &opts->proxy_opts;
885 886 887
	}

	if (!git_remote_connected(remote) &&
888
	    (error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs, proxy, custom_headers)) < 0)
889 890
		goto on_error;

891
	if (ls_to_vector(&refs, remote) < 0)
892 893
		return -1;

894 895 896
	if ((git_vector_init(&specs, 0, NULL)) < 0)
		goto on_error;

897
	remote->passed_refspecs = 0;
898
	if (!refspecs || !refspecs->count) {
899 900 901 902 903 904 905 906
		to_active = &remote->refspecs;
	} else {
		for (i = 0; i < refspecs->count; i++) {
			if ((error = add_refspec_to(&specs, refspecs->strings[i], true)) < 0)
				goto on_error;
		}

		to_active = &specs;
907
		remote->passed_refspecs = 1;
908 909
	}

910 911 912
	free_refspecs(&remote->passive_refspecs);
	if ((error = dwim_refspecs(&remote->passive_refspecs, &remote->refspecs, &refs)) < 0)
		goto on_error;
913

914
	free_refspecs(&remote->active_refspecs);
915
	error = dwim_refspecs(&remote->active_refspecs, to_active, &refs);
916

917
	git_vector_free(&refs);
918 919
	free_refspecs(&specs);
	git_vector_free(&specs);
920 921

	if (error < 0)
922
		return error;
923

924 925 926 927 928
	if (remote->push) {
		git_push_free(remote->push);
		remote->push = NULL;
	}

929
	if ((error = git_fetch_negotiate(remote, opts)) < 0)
930
		return error;
931

932
	return git_fetch_download_pack(remote, cbs);
933 934 935 936 937 938

on_error:
	git_vector_free(&refs);
	free_refspecs(&specs);
	git_vector_free(&specs);
	return error;
939 940
}

941 942
int git_remote_fetch(
		git_remote *remote,
943
		const git_strarray *refspecs,
944
		const git_fetch_options *opts,
945
		const char *reflog_message)
946
{
947
	int error, update_fetchhead = 1;
948
	git_remote_autotag_option_t tagopt = remote->download_tags;
949
	bool prune = false;
950
	git_buf reflog_msg_buf = GIT_BUF_INIT;
951
	const git_remote_callbacks *cbs = NULL;
952
	const git_strarray *custom_headers = NULL;
953
	const git_proxy_options *proxy = NULL;
954 955 956 957

	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
958
		custom_headers = &opts->custom_headers;
959
		update_fetchhead = opts->update_fetchhead;
960
		tagopt = opts->download_tags;
961 962
		GITERR_CHECK_VERSION(&opts->proxy_opts, GIT_PROXY_OPTIONS_VERSION, "git_proxy_options");
		proxy = &opts->proxy_opts;
963
	}
964 965

	/* Connect and download everything */
966
	if ((error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs, proxy, custom_headers)) != 0)
967 968
		return error;

969
	error = git_remote_download(remote, refspecs, opts);
970 971 972 973

	/* We don't need to be connected anymore */
	git_remote_disconnect(remote);

974 975 976 977
	/* If the download failed, return the error */
	if (error != 0)
		return error;

978 979 980 981 982 983 984 985
	/* Default reflog message */
	if (reflog_message)
		git_buf_sets(&reflog_msg_buf, reflog_message);
	else {
		git_buf_printf(&reflog_msg_buf, "fetch %s",
				remote->name ? remote->name : remote->url);
	}

986
	/* Create "remote/foo" branches for all remote branches */
987
	error = git_remote_update_tips(remote, cbs, update_fetchhead, tagopt, git_buf_cstr(&reflog_msg_buf));
988
	git_buf_free(&reflog_msg_buf);
989 990 991
	if (error < 0)
		return error;

992 993
	if (opts && opts->prune == GIT_FETCH_PRUNE)
		prune = true;
994
	else if (opts && opts->prune == GIT_FETCH_PRUNE_UNSPECIFIED && remote->prune_refs)
995 996 997 998 999 1000 1001
		prune = true;
	else if (opts && opts->prune == GIT_FETCH_NO_PRUNE)
		prune = false;
	else
		prune = remote->prune_refs;

	if (prune)
1002
		error = git_remote_prune(remote, cbs);
1003

1004
	return error;
1005 1006
}

1007 1008 1009 1010 1011 1012 1013 1014
static int remote_head_for_fetchspec_src(git_remote_head **out, git_vector *update_heads, const char *fetchspec_src)
{
	unsigned int i;
	git_remote_head *remote_ref;

	assert(update_heads && fetchspec_src);

	*out = NULL;
nulltoken committed
1015 1016 1017 1018 1019

	git_vector_foreach(update_heads, i, remote_ref) {
		if (strcmp(remote_ref->name, fetchspec_src) == 0) {
			*out = remote_ref;
			break;
1020 1021 1022 1023 1024 1025
		}
	}

	return 0;
}

1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057
static int ref_to_update(int *update, git_buf *remote_name, git_remote *remote, git_refspec *spec, const char *ref_name)
{
	int error = 0;
	git_repository *repo;
	git_buf upstream_remote = GIT_BUF_INIT;
	git_buf upstream_name = GIT_BUF_INIT;

	repo = git_remote_owner(remote);

	if ((!git_reference__is_branch(ref_name)) ||
	    !git_remote_name(remote) ||
	    (error = git_branch_upstream_remote(&upstream_remote, repo, ref_name) < 0) ||
	    git__strcmp(git_remote_name(remote), git_buf_cstr(&upstream_remote)) ||
	    (error = git_branch_upstream_name(&upstream_name, repo, ref_name)) < 0 ||
	    !git_refspec_dst_matches(spec, git_buf_cstr(&upstream_name)) ||
	    (error = git_refspec_rtransform(remote_name, spec, upstream_name.ptr)) < 0) {
		/* Not an error if there is no upstream */
		if (error == GIT_ENOTFOUND) {
			giterr_clear();
			error = 0;
		}

		*update = 0;
	} else {
		*update = 1;
	}

	git_buf_free(&upstream_remote);
	git_buf_free(&upstream_name);
	return error;
}

1058
static int remote_head_for_ref(git_remote_head **out, git_remote *remote, git_refspec *spec, git_vector *update_heads, git_reference *ref)
1059 1060 1061
{
	git_reference *resolved_ref = NULL;
	git_buf remote_name = GIT_BUF_INIT;
1062
	git_config *config = NULL;
1063
	const char *ref_name;
1064
	int error = 0, update;
1065

1066
	assert(out && spec && ref);
1067 1068 1069

	*out = NULL;

1070 1071 1072 1073 1074 1075 1076 1077 1078 1079
	error = git_reference_resolve(&resolved_ref, ref);

	/* If we're in an unborn branch, let's pretend nothing happened */
	if (error == GIT_ENOTFOUND && git_reference_type(ref) == GIT_REF_SYMBOLIC) {
		ref_name = git_reference_symbolic_target(ref);
		error = 0;
	} else {
		ref_name = git_reference_name(resolved_ref);
	}

1080
	if ((error = ref_to_update(&update, &remote_name, remote, spec, ref_name)) < 0)
1081 1082
		goto cleanup;

1083 1084
	if (update)
		error = remote_head_for_fetchspec_src(out, update_heads, git_buf_cstr(&remote_name));
1085 1086

cleanup:
Carlos Martín Nieto committed
1087
	git_buf_free(&remote_name);
1088
	git_reference_free(resolved_ref);
1089
	git_config_free(config);
1090 1091 1092
	return error;
}

1093
static int git_remote_write_fetchhead(git_remote *remote, git_refspec *spec, git_vector *update_heads)
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104
{
	git_reference *head_ref = NULL;
	git_fetchhead_ref *fetchhead_ref;
	git_remote_head *remote_ref, *merge_remote_ref;
	git_vector fetchhead_refs;
	bool include_all_fetchheads;
	unsigned int i = 0;
	int error = 0;

	assert(remote);

1105 1106 1107 1108
	/* no heads, nothing to do */
	if (update_heads->length == 0)
		return 0;

1109 1110 1111 1112 1113 1114 1115 1116 1117
	if (git_vector_init(&fetchhead_refs, update_heads->length, git_fetchhead_ref_cmp) < 0)
		return -1;

	/* Iff refspec is * (but not subdir slash star), include tags */
	include_all_fetchheads = (strcmp(GIT_REFS_HEADS_DIR "*", git_refspec_src(spec)) == 0);

	/* Determine what to merge: if refspec was a wildcard, just use HEAD */
	if (git_refspec_is_wildcard(spec)) {
		if ((error = git_reference_lookup(&head_ref, remote->repo, GIT_HEAD_FILE)) < 0 ||
1118
			(error = remote_head_for_ref(&merge_remote_ref, remote, spec, update_heads, head_ref)) < 0)
1119 1120 1121 1122 1123 1124 1125 1126
				goto cleanup;
	} else {
		/* If we're fetching a single refspec, that's the only thing that should be in FETCH_HEAD. */
		if ((error = remote_head_for_fetchspec_src(&merge_remote_ref, update_heads, git_refspec_src(spec))) < 0)
			goto cleanup;
	}

	/* Create the FETCH_HEAD file */
nulltoken committed
1127
	git_vector_foreach(update_heads, i, remote_ref) {
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
		int merge_this_fetchhead = (merge_remote_ref == remote_ref);

		if (!include_all_fetchheads &&
			!git_refspec_src_matches(spec, remote_ref->name) &&
			!merge_this_fetchhead)
			continue;

		if (git_fetchhead_ref_create(&fetchhead_ref,
			&remote_ref->oid,
			merge_this_fetchhead,
			remote_ref->name,
			git_remote_url(remote)) < 0)
			goto cleanup;

		if (git_vector_insert(&fetchhead_refs, fetchhead_ref) < 0)
			goto cleanup;
	}

	git_fetchhead_write(remote->repo, &fetchhead_refs);

cleanup:
	for (i = 0; i < fetchhead_refs.length; ++i)
		git_fetchhead_ref_free(fetchhead_refs.contents[i]);

	git_vector_free(&fetchhead_refs);
	git_reference_free(head_ref);

	return error;
}

1158 1159 1160 1161 1162
/**
 * Generate a list of candidates for pruning by getting a list of
 * references which match the rhs of an active refspec.
 */
static int prune_candidates(git_vector *candidates, git_remote *remote)
1163 1164
{
	git_strarray arr = { 0 };
1165
	size_t i;
1166 1167 1168 1169 1170
	int error;

	if ((error = git_reference_list(&arr, remote->repo)) < 0)
		return error;

1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197
	for (i = 0; i < arr.count; i++) {
		const char *refname = arr.strings[i];
		char *refname_dup;

		if (!git_remote__matching_dst_refspec(remote, refname))
			continue;

		refname_dup = git__strdup(refname);
		GITERR_CHECK_ALLOC(refname_dup);

		if ((error = git_vector_insert(candidates, refname_dup)) < 0)
			goto out;
	}

out:
	git_strarray_free(&arr);
	return error;
}

static int find_head(const void *_a, const void *_b)
{
	git_remote_head *a = (git_remote_head *) _a;
	git_remote_head *b = (git_remote_head *) _b;

	return strcmp(a->name, b->name);
}

1198
int git_remote_prune(git_remote *remote, const git_remote_callbacks *callbacks)
1199 1200 1201 1202 1203 1204 1205 1206 1207
{
	size_t i, j;
	git_vector remote_refs = GIT_VECTOR_INIT;
	git_vector candidates = GIT_VECTOR_INIT;
	const git_refspec *spec;
	const char *refname;
	int error;
	git_oid zero_id = {{ 0 }};

1208 1209 1210
	if (callbacks)
		GITERR_CHECK_VERSION(callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");

1211 1212 1213
	if ((error = ls_to_vector(&remote_refs, remote)) < 0)
		goto cleanup;

1214
	git_vector_set_cmp(&remote_refs, find_head);
1215

1216 1217
	if ((error = prune_candidates(&candidates, remote)) < 0)
		goto cleanup;
1218

1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
	/*
	 * Remove those entries from the candidate list for which we
	 * can find a remote reference in at least one refspec.
	 */
	git_vector_foreach(&candidates, i, refname) {
		git_vector_foreach(&remote->active_refspecs, j, spec) {
			git_buf buf = GIT_BUF_INIT;
			size_t pos;
			char *src_name;
			git_remote_head key = {0};

			if (!git_refspec_dst_matches(spec, refname))
1231 1232
				continue;

1233 1234
			if ((error = git_refspec_rtransform(&buf, spec, refname)) < 0)
				goto cleanup;
1235

1236 1237 1238
			key.name = (char *) git_buf_cstr(&buf);
			error = git_vector_search(&pos, &remote_refs, &key);
			git_buf_free(&buf);
1239

1240 1241
			if (error < 0 && error != GIT_ENOTFOUND)
				goto cleanup;
1242

1243
			if (error == GIT_ENOTFOUND)
1244 1245
				continue;

1246 1247 1248 1249 1250 1251
			/* if we did find a source, remove it from the candiates */
			if ((error = git_vector_set((void **) &src_name, &candidates, i, NULL)) < 0)
				goto cleanup;

			git__free(src_name);
			break;
1252 1253 1254
		}
	}

1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286
	/*
	 * For those candidates still left in the list, we need to
	 * remove them. We do not remove symrefs, as those are for
	 * stuff like origin/HEAD which will never match, but we do
	 * not want to remove them.
	 */
	git_vector_foreach(&candidates, i, refname) {
		git_reference *ref;
		git_oid id;

		if (refname == NULL)
			continue;

		error = git_reference_lookup(&ref, remote->repo, refname);
		/* as we want it gone, let's not consider this an error */
		if (error == GIT_ENOTFOUND)
			continue;

		if (error < 0)
			goto cleanup;

		if (git_reference_type(ref) == GIT_REF_SYMBOLIC) {
			git_reference_free(ref);
			continue;
		}

		git_oid_cpy(&id, git_reference_target(ref));
		error = git_reference_delete(ref);
		git_reference_free(ref);
		if (error < 0)
			goto cleanup;

1287 1288
		if (callbacks && callbacks->update_tips)
			error = callbacks->update_tips(refname, &id, &zero_id, callbacks->payload);
1289 1290 1291 1292 1293

		if (error < 0)
			goto cleanup;
	}

1294 1295
cleanup:
	git_vector_free(&remote_refs);
1296
	git_vector_free_deep(&candidates);
1297 1298 1299
	return error;
}

1300 1301
static int update_tips_for_spec(
		git_remote *remote,
1302
		const git_remote_callbacks *callbacks,
1303
		int update_fetchhead,
1304
		git_remote_autotag_option_t tagopt,
1305 1306 1307
		git_refspec *spec,
		git_vector *refs,
		const char *log_message)
1308
{
1309
	int error = 0, autotag;
1310
	unsigned int i = 0;
1311
	git_buf refname = GIT_BUF_INIT;
1312
	git_oid old;
1313
	git_odb *odb;
1314 1315
	git_remote_head *head;
	git_reference *ref;
1316
	git_refspec tagspec;
1317
	git_vector update_heads;
1318

1319 1320
	assert(remote);

1321
	if (git_repository_odb__weakptr(&odb, remote->repo) < 0)
1322 1323
		return -1;

1324
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
1325 1326
		return -1;

1327
	/* Make a copy of the transport's refs */
1328
	if (git_vector_init(&update_heads, 16, NULL) < 0)
1329
		return -1;
1330

1331 1332
	for (; i < refs->length; ++i) {
		head = git_vector_get(refs, i);
1333
		autotag = 0;
1334
		git_buf_clear(&refname);
1335

1336 1337 1338 1339
		/* Ignore malformed ref names (which also saves us from tag^{} */
		if (!git_reference_is_valid_name(head->name))
			continue;

1340
		/* If we have a tag, see if the auto-follow rules say to update it */
1341
		if (git_refspec_src_matches(&tagspec, head->name)) {
1342
			if (tagopt != GIT_REMOTE_DOWNLOAD_TAGS_NONE) {
1343

1344
				if (tagopt == GIT_REMOTE_DOWNLOAD_TAGS_AUTO)
1345
					autotag = 1;
1346

1347 1348 1349 1350
				git_buf_clear(&refname);
				if (git_buf_puts(&refname, head->name) < 0)
					goto on_error;
			}
1351 1352 1353 1354
		}

		/* If we didn't want to auto-follow the tag, check if the refspec matches */
		if (!autotag && git_refspec_src_matches(spec, head->name)) {
1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367
			if (spec->dst) {
				if (git_refspec_transform(&refname, spec, head->name) < 0)
					goto on_error;
			} else {
				/*
				 * no rhs mans store it in FETCH_HEAD, even if we don't
				 update anything else.
				 */
				if ((error = git_vector_insert(&update_heads, head)) < 0)
					goto on_error;

				continue;
			}
1368 1369 1370 1371
		}

		/* If we still don't have a refname, we don't want it */
		if (git_buf_len(&refname) == 0) {
1372 1373 1374
			continue;
		}

1375
		/* In autotag mode, only create tags for objects already in db */
1376 1377
		if (autotag && !git_odb_exists(odb, &head->oid))
			continue;
1378

1379
		if (!autotag && git_vector_insert(&update_heads, head) < 0)
1380 1381
			goto on_error;

1382
		error = git_reference_name_to_id(&old, remote->repo, refname.ptr);
1383
		if (error < 0 && error != GIT_ENOTFOUND)
1384 1385
			goto on_error;

1386
		if (error == GIT_ENOTFOUND) {
1387 1388
			memset(&old, 0, GIT_OID_RAWSZ);

1389 1390 1391 1392
			if (autotag && git_vector_insert(&update_heads, head) < 0)
				goto on_error;
		}

1393
		if (!git_oid__cmp(&old, &head->oid))
1394
			continue;
1395

1396
		/* In autotag mode, don't overwrite any locally-existing tags */
1397
		error = git_reference_create(&ref, remote->repo, refname.ptr, &head->oid, !autotag, 
1398
				log_message);
1399 1400 1401 1402 1403

		if (error == GIT_EEXISTS)
			continue;

		if (error < 0)
1404
			goto on_error;
1405 1406

		git_reference_free(ref);
1407

1408 1409
		if (callbacks && callbacks->update_tips != NULL) {
			if (callbacks->update_tips(refname.ptr, &old, &head->oid, callbacks->payload) < 0)
1410 1411
				goto on_error;
		}
1412 1413
	}

1414
	if (update_fetchhead &&
1415
	    (error = git_remote_write_fetchhead(remote, spec, &update_heads)) < 0)
1416 1417 1418
		goto on_error;

	git_vector_free(&update_heads);
1419
	git_refspec__free(&tagspec);
1420
	git_buf_free(&refname);
1421 1422 1423
	return 0;

on_error:
1424
	git_vector_free(&update_heads);
1425
	git_refspec__free(&tagspec);
1426 1427
	git_buf_free(&refname);
	return -1;
1428

1429 1430
}

1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487
/**
 * Iteration over the three vectors, with a pause whenever we find a match
 *
 * On each stop, we store the iteration stat in the inout i,j,k
 * parameters, and return the currently matching passive refspec as
 * well as the head which we matched.
 */
static int next_head(const git_remote *remote, git_vector *refs,
		     git_refspec **out_spec, git_remote_head **out_head,
		     size_t *out_i, size_t *out_j, size_t *out_k)
{
	const git_vector *active, *passive;
	git_remote_head *head;
	git_refspec *spec, *passive_spec;
	size_t i, j, k;

	active = &remote->active_refspecs;
	passive = &remote->passive_refspecs;

	i = *out_i;
	j = *out_j;
	k = *out_k;

	for (; i < refs->length; i++) {
		head = git_vector_get(refs, i);

		if (!git_reference_is_valid_name(head->name))
			continue;

		for (; j < active->length; j++) {
			spec = git_vector_get(active, j);

			if (!git_refspec_src_matches(spec, head->name))
				continue;

			for (; k < passive->length; k++) {
				passive_spec = git_vector_get(passive, k);

				if (!git_refspec_src_matches(passive_spec, head->name))
				    continue;

				*out_spec = passive_spec;
				*out_head = head;
				*out_i = i;
				*out_j = j;
				*out_k = k + 1;
				return 0;

			}
			k = 0;
		}
		j = 0;
	}

	return GIT_ITEROVER;
}

1488 1489
static int opportunistic_updates(const git_remote *remote, const git_remote_callbacks *callbacks,
				 git_vector *refs, const char *msg)
1490 1491 1492 1493 1494 1495
{
	size_t i, j, k;
	git_refspec *spec;
	git_remote_head *head;
	git_reference *ref;
	git_buf refname = GIT_BUF_INIT;
1496
	int error = 0;
1497 1498 1499 1500

	i = j = k = 0;

	while ((error = next_head(remote, refs, &spec, &head, &i, &j, &k)) == 0) {
1501
		git_oid old = {{ 0 }};
1502 1503 1504 1505 1506 1507 1508 1509
		/*
		 * If we got here, there is a refspec which was used
		 * for fetching which matches the source of one of the
		 * passive refspecs, so we should update that
		 * remote-tracking branch, but not add it to
		 * FETCH_HEAD
		 */

1510
		git_buf_clear(&refname);
1511
		if ((error = git_refspec_transform(&refname, spec, head->name)) < 0)
1512
			goto cleanup;
1513

1514 1515 1516 1517 1518 1519
		error = git_reference_name_to_id(&old, remote->repo, refname.ptr);
		if (error < 0 && error != GIT_ENOTFOUND)
			goto cleanup;

		if (!git_oid_cmp(&old, &head->oid))
			continue;
1520

1521 1522 1523 1524 1525 1526
		/* If we did find a current reference, make sure we haven't lost a race */
		if (error)
			error = git_reference_create(&ref, remote->repo, refname.ptr, &head->oid, true, msg);
		else
			error = git_reference_create_matching(&ref, remote->repo, refname.ptr, &head->oid, true, &old, msg);
		git_reference_free(ref);
1527
		if (error < 0)
1528 1529 1530 1531 1532 1533
			goto cleanup;

		if (callbacks && callbacks->update_tips != NULL) {
			if (callbacks->update_tips(refname.ptr, &old, &head->oid, callbacks->payload) < 0)
				goto cleanup;
		}
1534 1535
	}

1536 1537 1538 1539 1540 1541
	if (error == GIT_ITEROVER)
		error = 0;

cleanup:
	git_buf_free(&refname);
	return error;
1542 1543
}

1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557
static int truncate_fetch_head(const char *gitdir)
{
	git_buf path = GIT_BUF_INIT;
	int error;

	if ((error = git_buf_joinpath(&path, gitdir, GIT_FETCH_HEAD_FILE)) < 0)
		return error;

	error = git_futils_truncate(path.ptr, GIT_REFS_FILE_MODE);
	git_buf_free(&path);

	return error;
}

1558 1559
int git_remote_update_tips(
		git_remote *remote,
1560
		const git_remote_callbacks *callbacks,
1561
		int update_fetchhead,
1562
		git_remote_autotag_option_t download_tags,
1563
		const char *reflog_message)
1564
{
1565
	git_refspec *spec, tagspec;
1566
	git_vector refs = GIT_VECTOR_INIT;
1567
	git_remote_autotag_option_t tagopt;
1568
	int error;
1569 1570
	size_t i;

1571 1572
	/* push has its own logic hidden away in the push object */
	if (remote->push) {
1573
		return git_push_update_tips(remote->push, callbacks);
1574 1575
	}

1576 1577 1578
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
		return -1;

1579 1580

	if ((error = ls_to_vector(&refs, remote)) < 0)
1581 1582
		goto out;

1583
	if (download_tags == GIT_REMOTE_DOWNLOAD_TAGS_UNSPECIFIED)
1584 1585 1586 1587
		tagopt = remote->download_tags;
	else
		tagopt = download_tags;

1588 1589 1590
	if ((error = truncate_fetch_head(git_repository_path(remote->repo))) < 0)
		goto out;

1591 1592
	if (tagopt == GIT_REMOTE_DOWNLOAD_TAGS_ALL) {
		if ((error = update_tips_for_spec(remote, callbacks, update_fetchhead, tagopt, &tagspec, &refs, reflog_message)) < 0)
1593
			goto out;
1594
	}
1595

1596
	git_vector_foreach(&remote->active_refspecs, i, spec) {
1597 1598 1599
		if (spec->push)
			continue;

1600
		if ((error = update_tips_for_spec(remote, callbacks, update_fetchhead, tagopt, spec, &refs, reflog_message)) < 0)
1601
			goto out;
1602 1603
	}

1604 1605
	/* only try to do opportunisitic updates if the refpec lists differ */
	if (remote->passed_refspecs)
1606
		error = opportunistic_updates(remote, callbacks, &refs, reflog_message);
1607

1608
out:
1609
	git_vector_free(&refs);
1610 1611
	git_refspec__free(&tagspec);
	return error;
1612 1613
}

1614
int git_remote_connected(const git_remote *remote)
1615
{
1616
	assert(remote);
1617 1618 1619 1620 1621

	if (!remote->transport || !remote->transport->is_connected)
		return 0;

	/* Ask the transport if it's connected. */
1622
	return remote->transport->is_connected(remote->transport);
1623 1624
}

1625 1626
void git_remote_stop(git_remote *remote)
{
1627 1628 1629
	assert(remote);

	if (remote->transport && remote->transport->cancel)
1630
		remote->transport->cancel(remote->transport);
1631 1632
}

1633 1634
void git_remote_disconnect(git_remote *remote)
{
1635 1636
	assert(remote);

1637 1638
	if (git_remote_connected(remote))
		remote->transport->close(remote->transport);
1639 1640
}

Carlos Martín Nieto committed
1641 1642
void git_remote_free(git_remote *remote)
{
1643 1644 1645
	if (remote == NULL)
		return;

1646 1647 1648 1649 1650 1651 1652 1653 1654
	if (remote->transport != NULL) {
		git_remote_disconnect(remote);

		remote->transport->free(remote->transport);
		remote->transport = NULL;
	}

	git_vector_free(&remote->refs);

1655
	free_refspecs(&remote->refspecs);
1656 1657
	git_vector_free(&remote->refspecs);

1658 1659 1660
	free_refspecs(&remote->active_refspecs);
	git_vector_free(&remote->active_refspecs);

1661 1662 1663
	free_refspecs(&remote->passive_refspecs);
	git_vector_free(&remote->passive_refspecs);

1664
	git_push_free(remote->push);
1665
	git__free(remote->url);
1666
	git__free(remote->pushurl);
1667 1668
	git__free(remote->name);
	git__free(remote);
Carlos Martín Nieto committed
1669
}
1670

1671
static int remote_list_cb(const git_config_entry *entry, void *payload)
1672
{
1673
	git_vector *list = payload;
1674 1675 1676
	const char *name = entry->name + strlen("remote.");
	size_t namelen = strlen(name);
	char *remote_name;
1677

1678
	/* we know name matches "remote.<stuff>.(push)?url" */
1679

1680 1681 1682 1683
	if (!strcmp(&name[namelen - 4], ".url"))
		remote_name = git__strndup(name, namelen - 4); /* strip ".url" */
	else
		remote_name = git__strndup(name, namelen - 8); /* strip ".pushurl" */
1684
	GITERR_CHECK_ALLOC(remote_name);
1685

1686
	return git_vector_insert(list, remote_name);
1687 1688 1689 1690 1691
}

int git_remote_list(git_strarray *remotes_list, git_repository *repo)
{
	int error;
1692
	git_config *cfg;
1693
	git_vector list = GIT_VECTOR_INIT;
1694

1695 1696
	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
		return error;
1697

1698
	if ((error = git_vector_init(&list, 4, git__strcmp_cb)) < 0)
1699
		return error;
1700

1701
	error = git_config_foreach_match(
1702
		cfg, "^remote\\..*\\.(push)?url$", remote_list_cb, &list);
1703

1704
	if (error < 0) {
1705
		git_vector_free_deep(&list);
1706 1707 1708
		return error;
	}

1709
	git_vector_uniq(&list, git__free);
1710

1711 1712
	remotes_list->strings =
		(char **)git_vector_detach(&remotes_list->count, NULL, &list);
1713

1714
	return 0;
1715
}
1716

Ben Straub committed
1717
const git_transfer_progress* git_remote_stats(git_remote *remote)
1718 1719 1720 1721 1722
{
	assert(remote);
	return &remote->stats;
}

1723
git_remote_autotag_option_t git_remote_autotag(const git_remote *remote)
1724 1725 1726 1727
{
	return remote->download_tags;
}

1728
int git_remote_set_autotag(git_repository *repo, const char *remote, git_remote_autotag_option_t value)
1729
{
1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757
	git_buf var = GIT_BUF_INIT;
	git_config *config;
	int error;

	assert(repo && remote);

	if ((error = ensure_remote_name_is_valid(remote)) < 0)
		return error;

	if ((error = git_repository_config__weakptr(&config, repo)) < 0)
		return error;

	if ((error = git_buf_printf(&var, CONFIG_TAGOPT_FMT, remote)))
		return error;

	switch (value) {
	case GIT_REMOTE_DOWNLOAD_TAGS_NONE:
		error = git_config_set_string(config, var.ptr, "--no-tags");
		break;
	case GIT_REMOTE_DOWNLOAD_TAGS_ALL:
		error = git_config_set_string(config, var.ptr, "--tags");
		break;
	case GIT_REMOTE_DOWNLOAD_TAGS_AUTO:
		error = git_config_delete_entry(config, var.ptr);
		if (error == GIT_ENOTFOUND)
			error = 0;
		break;
	default:
1758
		giterr_set(GITERR_INVALID, "invalid value for the tagopt setting");
1759 1760 1761 1762 1763
		error = -1;
	}

	git_buf_free(&var);
	return error;
1764
}
1765

1766 1767 1768 1769 1770
int git_remote_prune_refs(const git_remote *remote)
{
	return remote->prune_refs;
}

1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782
static int rename_remote_config_section(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
	git_buf old_section_name = GIT_BUF_INIT,
		new_section_name = GIT_BUF_INIT;
	int error = -1;

	if (git_buf_printf(&old_section_name, "remote.%s", old_name) < 0)
		goto cleanup;

1783 1784 1785
	if (new_name &&
		(git_buf_printf(&new_section_name, "remote.%s", new_name) < 0))
			goto cleanup;
1786 1787 1788 1789

	error = git_config_rename_section(
		repo,
		git_buf_cstr(&old_section_name),
1790
		new_name ? git_buf_cstr(&new_section_name) : NULL);
1791 1792 1793 1794 1795 1796 1797 1798

cleanup:
	git_buf_free(&old_section_name);
	git_buf_free(&new_section_name);

	return error;
}

1799
struct update_data {
1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813
	git_config *config;
	const char *old_remote_name;
	const char *new_remote_name;
};

static int update_config_entries_cb(
	const git_config_entry *entry,
	void *payload)
{
	struct update_data *data = (struct update_data *)payload;

	if (strcmp(entry->value, data->old_remote_name))
		return 0;

1814 1815
	return git_config_set_string(
		data->config, entry->name, data->new_remote_name);
1816 1817 1818 1819 1820 1821 1822
}

static int update_branch_remote_config_entry(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1823 1824
	int error;
	struct update_data data = { NULL };
1825

1826 1827
	if ((error = git_repository_config__weakptr(&data.config, repo)) < 0)
		return error;
1828 1829 1830 1831

	data.old_remote_name = old_name;
	data.new_remote_name = new_name;

1832
	return git_config_foreach_match(
1833
		data.config, "branch\\..+\\.remote", update_config_entries_cb, &data);
1834 1835 1836
}

static int rename_one_remote_reference(
1837
	git_reference *reference_in,
1838 1839 1840
	const char *old_remote_name,
	const char *new_remote_name)
{
1841
	int error;
1842 1843
	git_reference *ref = NULL, *dummy = NULL;
	git_buf namespace = GIT_BUF_INIT, old_namespace = GIT_BUF_INIT;
1844
	git_buf new_name = GIT_BUF_INIT;
1845
	git_buf log_message = GIT_BUF_INIT;
1846 1847
	size_t pfx_len;
	const char *target;
1848

1849 1850 1851 1852 1853 1854
	if ((error = git_buf_printf(&namespace, GIT_REFS_REMOTES_DIR "%s/", new_remote_name)) < 0)
		return error;

	pfx_len = strlen(GIT_REFS_REMOTES_DIR) + strlen(old_remote_name) + 1;
	git_buf_puts(&new_name, namespace.ptr);
	if ((error = git_buf_puts(&new_name, git_reference_name(reference_in) + pfx_len)) < 0)
1855
		goto cleanup;
1856

1857 1858 1859 1860
	if ((error = git_buf_printf(&log_message,
					"renamed remote %s to %s",
					old_remote_name, new_remote_name)) < 0)
		goto cleanup;
1861

1862
	if ((error = git_reference_rename(&ref, reference_in, git_buf_cstr(&new_name), 1,
1863
					  git_buf_cstr(&log_message))) < 0)
1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882
		goto cleanup;

	if (git_reference_type(ref) != GIT_REF_SYMBOLIC)
		goto cleanup;

	/* Handle refs like origin/HEAD -> origin/master */
	target = git_reference_symbolic_target(ref);
	if ((error = git_buf_printf(&old_namespace, GIT_REFS_REMOTES_DIR "%s/", old_remote_name)) < 0)
		goto cleanup;

	if (git__prefixcmp(target, old_namespace.ptr))
		goto cleanup;

	git_buf_clear(&new_name);
	git_buf_puts(&new_name, namespace.ptr);
	if ((error = git_buf_puts(&new_name, target + pfx_len)) < 0)
		goto cleanup;

	error = git_reference_symbolic_set_target(&dummy, ref, git_buf_cstr(&new_name),
1883
						  git_buf_cstr(&log_message));
1884 1885

	git_reference_free(dummy);
1886 1887

cleanup:
1888 1889 1890 1891
	git_reference_free(reference_in);
	git_reference_free(ref);
	git_buf_free(&namespace);
	git_buf_free(&old_namespace);
1892
	git_buf_free(&new_name);
1893
	git_buf_free(&log_message);
1894 1895 1896 1897 1898 1899 1900 1901
	return error;
}

static int rename_remote_references(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1902
	int error;
1903
	git_buf buf = GIT_BUF_INIT;
Vicent Marti committed
1904
	git_reference *ref;
1905
	git_reference_iterator *iter;
1906

1907
	if ((error = git_buf_printf(&buf, GIT_REFS_REMOTES_DIR "%s/*", old_name)) < 0)
1908
		return error;
1909

1910 1911
	error = git_reference_iterator_glob_new(&iter, repo, git_buf_cstr(&buf));
	git_buf_free(&buf);
1912

1913 1914 1915 1916
	if (error < 0)
		return error;

	while ((error = git_reference_next(&ref, iter)) == 0) {
1917 1918
		if ((error = rename_one_remote_reference(ref, old_name, new_name)) < 0)
			break;
1919 1920 1921
	}

	git_reference_iterator_free(iter);
1922

1923
	return (error == GIT_ITEROVER) ? 0 : error;
1924 1925
}

1926
static int rename_fetch_refspecs(git_vector *problems, git_remote *remote, const char *new_name)
1927 1928
{
	git_config *config;
1929
	git_buf base = GIT_BUF_INIT, var = GIT_BUF_INIT, val = GIT_BUF_INIT;
1930
	const git_refspec *spec;
1931
	size_t i;
1932
	int error = 0;
1933

1934
	if ((error = git_repository_config__weakptr(&config, remote->repo)) < 0)
1935 1936
		return error;

1937 1938 1939
	if ((error = git_vector_init(problems, 1, NULL)) < 0)
		return error;

1940 1941 1942
	if ((error = git_buf_printf(
			&base, "+refs/heads/*:refs/remotes/%s/*", remote->name)) < 0)
		return error;
1943

1944
	git_vector_foreach(&remote->refspecs, i, spec) {
1945 1946
		if (spec->push)
			continue;
1947

1948
		/* Does the dst part of the refspec follow the expected format? */
1949
		if (strcmp(git_buf_cstr(&base), spec->string)) {
1950
			char *dup;
1951

1952 1953 1954 1955
			dup = git__strdup(spec->string);
			GITERR_CHECK_ALLOC(dup);

			if ((error = git_vector_insert(problems, dup)) < 0)
1956
				break;
1957

1958 1959
			continue;
		}
1960

1961
		/* If we do want to move it to the new section */
1962

1963 1964
		git_buf_clear(&val);
		git_buf_clear(&var);
1965

1966 1967 1968 1969 1970
		if (git_buf_printf(
				&val, "+refs/heads/*:refs/remotes/%s/*", new_name) < 0 ||
			git_buf_printf(&var, "remote.%s.fetch", new_name) < 0)
		{
			error = -1;
1971
			break;
1972
		}
1973

1974 1975
		if ((error = git_config_set_string(
				config, git_buf_cstr(&var), git_buf_cstr(&val))) < 0)
1976
			break;
1977
	}
1978

1979 1980 1981
	git_buf_free(&base);
	git_buf_free(&var);
	git_buf_free(&val);
1982 1983 1984 1985 1986 1987 1988 1989 1990

	if (error < 0) {
		char *str;
		git_vector_foreach(problems, i, str)
			git__free(str);

		git_vector_free(problems);
	}

1991 1992 1993
	return error;
}

1994
int git_remote_rename(git_strarray *out, git_repository *repo, const char *name, const char *new_name)
1995 1996
{
	int error;
1997
	git_vector problem_refspecs = GIT_VECTOR_INIT;
1998
	git_remote *remote = NULL;
1999

2000
	assert(out && repo && name && new_name);
2001

2002
	if ((error = git_remote_lookup(&remote, repo, name)) < 0)
2003
		return error;
2004

2005
	if ((error = ensure_remote_name_is_valid(new_name)) < 0)
2006
		goto cleanup;
2007

2008 2009
	if ((error = ensure_remote_doesnot_exist(repo, new_name)) < 0)
		goto cleanup;
2010

2011 2012
	if ((error = rename_remote_config_section(repo, name, new_name)) < 0)
		goto cleanup;
2013

2014 2015
	if ((error = update_branch_remote_config_entry(repo, name, new_name)) < 0)
		goto cleanup;
2016

2017 2018
	if ((error = rename_remote_references(repo, name, new_name)) < 0)
		goto cleanup;
2019

2020
	if ((error = rename_fetch_refspecs(&problem_refspecs, remote, new_name)) < 0)
2021
		goto cleanup;
2022

2023 2024 2025
	out->count = problem_refspecs.length;
	out->strings = (char **) problem_refspecs.contents;

2026 2027 2028
cleanup:
	if (error < 0)
		git_vector_free(&problem_refspecs);
2029

2030 2031
	git_remote_free(remote);
	return error;
2032
}
2033

2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052
int git_remote_is_valid_name(
	const char *remote_name)
{
	git_buf buf = GIT_BUF_INIT;
	git_refspec refspec;
	int error = -1;

	if (!remote_name || *remote_name == '\0')
		return 0;

	git_buf_printf(&buf, "refs/heads/test:refs/remotes/%s/test", remote_name);
	error = git_refspec__parse(&refspec, git_buf_cstr(&buf), true);

	git_buf_free(&buf);
	git_refspec__free(&refspec);

	giterr_clear();
	return error == 0;
}
2053 2054 2055 2056 2057 2058

git_refspec *git_remote__matching_refspec(git_remote *remote, const char *refname)
{
	git_refspec *spec;
	size_t i;

2059
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
		if (spec->push)
			continue;

		if (git_refspec_src_matches(spec, refname))
			return spec;
	}

	return NULL;
}

git_refspec *git_remote__matching_dst_refspec(git_remote *remote, const char *refname)
{
	git_refspec *spec;
	size_t i;

2075
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2076 2077 2078 2079 2080 2081 2082 2083 2084 2085
		if (spec->push)
			continue;

		if (git_refspec_dst_matches(spec, refname))
			return spec;
	}

	return NULL;
}

2086
int git_remote_add_fetch(git_repository *repo, const char *remote, const char *refspec)
2087
{
2088
	return write_add_refspec(repo, remote, refspec, true);
2089 2090
}

2091
int git_remote_add_push(git_repository *repo, const char *remote, const char *refspec)
2092
{
2093
	return write_add_refspec(repo, remote, refspec, false);
2094 2095
}

2096
static int copy_refspecs(git_strarray *array, const git_remote *remote, unsigned int push)
2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109
{
	size_t i;
	git_vector refspecs;
	git_refspec *spec;
	char *dup;

	if (git_vector_init(&refspecs, remote->refspecs.length, NULL) < 0)
		return -1;

	git_vector_foreach(&remote->refspecs, i, spec) {
		if (spec->push != push)
			continue;

2110
		if ((dup = git__strdup(spec->string)) == NULL)
2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124
			goto on_error;

		if (git_vector_insert(&refspecs, dup) < 0) {
			git__free(dup);
			goto on_error;
		}
	}

	array->strings = (char **)refspecs.contents;
	array->count = refspecs.length;

	return 0;

on_error:
2125
	git_vector_free_deep(&refspecs);
2126 2127 2128 2129

	return -1;
}

2130
int git_remote_get_fetch_refspecs(git_strarray *array, const git_remote *remote)
2131 2132 2133 2134
{
	return copy_refspecs(array, remote, false);
}

2135
int git_remote_get_push_refspecs(git_strarray *array, const git_remote *remote)
2136 2137 2138
{
	return copy_refspecs(array, remote, true);
}
2139

2140
size_t git_remote_refspec_count(const git_remote *remote)
2141 2142 2143 2144
{
	return remote->refspecs.length;
}

2145
const git_refspec *git_remote_get_refspec(const git_remote *remote, size_t n)
2146 2147 2148
{
	return git_vector_get(&remote->refspecs, n);
}
2149

2150
int git_remote_init_callbacks(git_remote_callbacks *opts, unsigned int version)
2151
{
2152 2153 2154
	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
		opts, version, git_remote_callbacks, GIT_REMOTE_CALLBACKS_INIT);
	return 0;
2155
}
2156

2157 2158
/* asserts a branch.<foo>.remote format */
static const char *name_offset(size_t *len_out, const char *name)
2159
{
2160 2161
	size_t prefix_len;
	const char *dot;
2162

2163 2164
	prefix_len = strlen("remote.");
	dot = strchr(name + prefix_len, '.');
2165

2166
	assert(dot);
2167

2168 2169
	*len_out = dot - name - prefix_len;
	return name + prefix_len;
2170 2171 2172 2173 2174 2175 2176 2177
}

static int remove_branch_config_related_entries(
	git_repository *repo,
	const char *remote_name)
{
	int error;
	git_config *config;
2178 2179 2180
	git_config_entry *entry;
	git_config_iterator *iter;
	git_buf buf = GIT_BUF_INIT;
2181 2182 2183 2184

	if ((error = git_repository_config__weakptr(&config, repo)) < 0)
		return error;

2185
	if ((error = git_config_iterator_glob_new(&iter, config, "branch\\..+\\.remote")) < 0)
2186 2187
		return error;

2188 2189 2190 2191
	/* find any branches with us as upstream and remove that config */
	while ((error = git_config_next(&entry, iter)) == 0) {
		const char *branch;
		size_t branch_len;
2192

2193 2194
		if (strcmp(remote_name, entry->value))
			continue;
2195

2196
		branch = name_offset(&branch_len, entry->name);
2197

2198 2199 2200 2201
		git_buf_clear(&buf);
		if (git_buf_printf(&buf, "branch.%.*s.merge", (int)branch_len, branch) < 0)
			break;

2202 2203 2204 2205 2206
		if ((error = git_config_delete_entry(config, git_buf_cstr(&buf))) < 0) {
			if (error != GIT_ENOTFOUND)
				break;
			giterr_clear();
		}
2207 2208 2209 2210 2211

		git_buf_clear(&buf);
		if (git_buf_printf(&buf, "branch.%.*s.remote", (int)branch_len, branch) < 0)
			break;

2212 2213 2214 2215 2216
		if ((error = git_config_delete_entry(config, git_buf_cstr(&buf))) < 0) {
			if (error != GIT_ENOTFOUND)
				break;
			giterr_clear();
		}
2217 2218
	}

2219 2220 2221 2222 2223
	if (error == GIT_ITEROVER)
		error = 0;

	git_buf_free(&buf);
	git_config_iterator_free(iter);
2224 2225 2226
	return error;
}

2227
static int remove_refs(git_repository *repo, const git_refspec *spec)
2228
{
2229 2230
	git_reference_iterator *iter = NULL;
	git_vector refs;
2231
	const char *name;
2232
	char *dup;
2233
	int error;
2234
	size_t i;
2235

2236
	if ((error = git_vector_init(&refs, 8, NULL)) < 0)
2237 2238
		return error;

2239 2240 2241
	if ((error = git_reference_iterator_new(&iter, repo)) < 0)
		goto cleanup;

2242
	while ((error = git_reference_next_name(&name, iter)) == 0) {
2243 2244 2245 2246 2247 2248 2249 2250
		if (!git_refspec_dst_matches(spec, name))
			continue;

		dup = git__strdup(name);
		if (!dup) {
			error = -1;
			goto cleanup;
		}
2251

2252 2253 2254
		if ((error = git_vector_insert(&refs, dup)) < 0)
			goto cleanup;
	}
2255 2256
	if (error == GIT_ITEROVER)
		error = 0;
2257 2258 2259 2260 2261 2262 2263
	if (error < 0)
		goto cleanup;

	git_vector_foreach(&refs, i, name) {
		if ((error = git_reference_remove(repo, name)) < 0)
			break;
	}
2264

2265 2266 2267 2268 2269 2270
cleanup:
	git_reference_iterator_free(iter);
	git_vector_foreach(&refs, i, dup) {
		git__free(dup);
	}
	git_vector_free(&refs);
2271 2272 2273 2274 2275 2276 2277 2278 2279 2280
	return error;
}

static int remove_remote_tracking(git_repository *repo, const char *remote_name)
{
	git_remote *remote;
	int error;
	size_t i, count;

	/* we want to use what's on the config, regardless of changes to the instance in memory */
2281
	if ((error = git_remote_lookup(&remote, repo, remote_name)) < 0)
2282 2283 2284 2285 2286 2287 2288 2289 2290 2291
		return error;

	count = git_remote_refspec_count(remote);
	for (i = 0; i < count; i++) {
		const git_refspec *refspec = git_remote_get_refspec(remote, i);

		/* shouldn't ever actually happen */
		if (refspec == NULL)
			continue;

2292
		if ((error = remove_refs(repo, refspec)) < 0)
2293 2294 2295 2296 2297 2298 2299
			break;
	}

	git_remote_free(remote);
	return error;
}

2300
int git_remote_delete(git_repository *repo, const char *name)
2301 2302 2303
{
	int error;

2304
	assert(repo && name);
2305

2306 2307 2308
	if ((error = remove_branch_config_related_entries(repo, name)) < 0 ||
	    (error = remove_remote_tracking(repo, name)) < 0 ||
	    (error = rename_remote_config_section(repo, name, NULL)) < 0)
2309 2310
		return error;

2311 2312
	return 0;
}
2313 2314 2315 2316 2317 2318 2319 2320 2321

int git_remote_default_branch(git_buf *out, git_remote *remote)
{
	const git_remote_head **heads;
	const git_remote_head *guess = NULL;
	const git_oid *head_id;
	size_t heads_len, i;
	int error;

2322 2323
	assert(out);

2324 2325 2326 2327 2328 2329
	if ((error = git_remote_ls(&heads, &heads_len, remote)) < 0)
		return error;

	if (heads_len == 0)
		return GIT_ENOTFOUND;

2330 2331 2332
	if (strcmp(heads[0]->name, GIT_HEAD_FILE))
		return GIT_ENOTFOUND;

2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348
	git_buf_sanitize(out);
	/* the first one must be HEAD so if that has the symref info, we're done */
	if (heads[0]->symref_target)
		return git_buf_puts(out, heads[0]->symref_target);

	/*
	 * If there's no symref information, we have to look over them
	 * and guess. We return the first match unless the master
	 * branch is a candidate. Then we return the master branch.
	 */
	head_id = &heads[0]->oid;

	for (i = 1; i < heads_len; i++) {
		if (git_oid_cmp(head_id, &heads[i]->oid))
			continue;

2349 2350 2351
		if (git__prefixcmp(heads[i]->name, GIT_REFS_HEADS_DIR))
			continue;

2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367
		if (!guess) {
			guess = heads[i];
			continue;
		}

		if (!git__strcmp(GIT_REFS_HEADS_MASTER_FILE, heads[i]->name)) {
			guess = heads[i];
			break;
		}
	}

	if (!guess)
		return GIT_ENOTFOUND;

	return git_buf_puts(out, guess->name);
}
2368

2369
int git_remote_upload(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2370 2371
{
	size_t i;
2372 2373
	int error;
	git_push *push;
2374
	git_refspec *spec;
2375
	const git_remote_callbacks *cbs = NULL;
2376
	const git_strarray *custom_headers = NULL;
2377
	const git_proxy_options *proxy = NULL;
2378

2379
	assert(remote);
2380

2381 2382 2383 2384 2385
	if (!remote->repo) {
		giterr_set(GITERR_INVALID, "cannot download detached remote");
		return -1;
	}

2386
	if (opts) {
2387
		cbs = &opts->callbacks;
2388
		custom_headers = &opts->custom_headers;
2389
		proxy = &opts->proxy_opts;
2390
	}
2391

2392
	if (!git_remote_connected(remote) &&
2393
	    (error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, proxy, custom_headers)) < 0)
2394 2395
		goto cleanup;

2396
	free_refspecs(&remote->active_refspecs);
Leo Yang committed
2397
	if ((error = dwim_refspecs(&remote->active_refspecs, &remote->refspecs, &remote->refs)) < 0)
2398 2399
		goto cleanup;

2400 2401 2402 2403 2404 2405
	if (remote->push) {
		git_push_free(remote->push);
		remote->push = NULL;
	}

	if ((error = git_push_new(&remote->push, remote)) < 0)
2406 2407
		return error;

2408
	push = remote->push;
2409 2410 2411 2412

	if (opts && (error = git_push_set_options(push, opts)) < 0)
		goto cleanup;

2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424
	if (refspecs && refspecs->count > 0) {
		for (i = 0; i < refspecs->count; i++) {
			if ((error = git_push_add_refspec(push, refspecs->strings[i])) < 0)
				goto cleanup;
		}
	} else {
		git_vector_foreach(&remote->refspecs, i, spec) {
			if (!spec->push)
				continue;
			if ((error = git_push_add_refspec(push, spec->string)) < 0)
				goto cleanup;
		}
2425 2426
	}

2427
	if ((error = git_push_finish(push, cbs)) < 0)
2428 2429
		goto cleanup;

2430
	if (cbs && cbs->push_update_reference &&
2431
	    (error = git_push_status_foreach(push, cbs->push_update_reference, cbs->payload)) < 0)
2432 2433 2434
		goto cleanup;

cleanup:
2435 2436 2437
	return error;
}

2438
int git_remote_push(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2439 2440
{
	int error;
2441
	const git_remote_callbacks *cbs = NULL;
2442
	const git_strarray *custom_headers = NULL;
2443
	const git_proxy_options *proxy = NULL;
2444

2445 2446 2447 2448 2449 2450 2451
	assert(remote);

	if (!remote->repo) {
		giterr_set(GITERR_INVALID, "cannot download detached remote");
		return -1;
	}

2452 2453 2454
	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
2455
		custom_headers = &opts->custom_headers;
2456 2457
		GITERR_CHECK_VERSION(&opts->proxy_opts, GIT_PROXY_OPTIONS_VERSION, "git_proxy_options");
		proxy = &opts->proxy_opts;
2458
	}
2459

2460
	assert(remote);
2461

2462
	if ((error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, proxy, custom_headers)) < 0)
2463 2464 2465 2466 2467
		return error;

	if ((error = git_remote_upload(remote, refspecs, opts)) < 0)
		return error;

2468
	error = git_remote_update_tips(remote, cbs, 0, 0, NULL);
2469

2470 2471 2472
	git_remote_disconnect(remote);
	return error;
}
2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501

#define PREFIX "url"
#define SUFFIX_FETCH "insteadof"
#define SUFFIX_PUSH "pushinsteadof"

char *apply_insteadof(git_config *config, const char *url, int direction)
{
	size_t match_length, prefix_length, suffix_length;
	char *replacement = NULL;
	const char *regexp;

	git_buf result = GIT_BUF_INIT;
	git_config_entry *entry;
	git_config_iterator *iter;

	assert(config);
	assert(url);
	assert(direction == GIT_DIRECTION_FETCH || direction == GIT_DIRECTION_PUSH);

	/* Add 1 to prefix/suffix length due to the additional escaped dot */
	prefix_length = strlen(PREFIX) + 1;
	if (direction == GIT_DIRECTION_FETCH) {
		regexp = PREFIX "\\..*\\." SUFFIX_FETCH;
		suffix_length = strlen(SUFFIX_FETCH) + 1;
	} else {
		regexp = PREFIX "\\..*\\." SUFFIX_PUSH;
		suffix_length = strlen(SUFFIX_PUSH) + 1;
	}

2502 2503
	if (git_config_iterator_glob_new(&iter, config, regexp) < 0)
		return NULL;
2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537

	match_length = 0;
	while (git_config_next(&entry, iter) == 0) {
		size_t n, replacement_length;

		/* Check if entry value is a prefix of URL */
		if (git__prefixcmp(url, entry->value))
			continue;
		/* Check if entry value is longer than previous
		 * prefixes */
		if ((n = strlen(entry->value)) <= match_length)
			continue;

		git__free(replacement);
		match_length = n;

		/* Cut off prefix and suffix of the value */
		replacement_length =
		    strlen(entry->name) - (prefix_length + suffix_length);
		replacement = git__strndup(entry->name + prefix_length,
				replacement_length);
	}

	git_config_iterator_free(iter);

	if (match_length == 0)
		return git__strdup(url);

	git_buf_printf(&result, "%s%s", replacement, url + match_length);

	git__free(replacement);

	return result.ptr;
}