remote.c 59.6 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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 */

#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 "common.h"
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#include "config.h"
#include "repository.h"
#include "remote.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;
665
	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
int git_remote_update_tips(
		git_remote *remote,
1546
		const git_remote_callbacks *callbacks,
1547
		int update_fetchhead,
1548
		git_remote_autotag_option_t download_tags,
1549
		const char *reflog_message)
1550
{
1551
	git_refspec *spec, tagspec;
1552
	git_vector refs = GIT_VECTOR_INIT;
1553
	git_remote_autotag_option_t tagopt;
1554
	int error;
1555 1556
	size_t i;

1557 1558
	/* push has its own logic hidden away in the push object */
	if (remote->push) {
1559
		return git_push_update_tips(remote->push, callbacks);
1560 1561
	}

1562 1563 1564
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
		return -1;

1565 1566

	if ((error = ls_to_vector(&refs, remote)) < 0)
1567 1568
		goto out;

1569
	if (download_tags == GIT_REMOTE_DOWNLOAD_TAGS_UNSPECIFIED)
1570 1571 1572 1573 1574 1575
		tagopt = remote->download_tags;
	else
		tagopt = download_tags;

	if (tagopt == GIT_REMOTE_DOWNLOAD_TAGS_ALL) {
		if ((error = update_tips_for_spec(remote, callbacks, update_fetchhead, tagopt, &tagspec, &refs, reflog_message)) < 0)
1576
			goto out;
1577
	}
1578

1579
	git_vector_foreach(&remote->active_refspecs, i, spec) {
1580 1581 1582
		if (spec->push)
			continue;

1583
		if ((error = update_tips_for_spec(remote, callbacks, update_fetchhead, tagopt, spec, &refs, reflog_message)) < 0)
1584
			goto out;
1585 1586
	}

1587 1588
	/* only try to do opportunisitic updates if the refpec lists differ */
	if (remote->passed_refspecs)
1589
		error = opportunistic_updates(remote, callbacks, &refs, reflog_message);
1590

1591
out:
1592
	git_vector_free(&refs);
1593 1594
	git_refspec__free(&tagspec);
	return error;
1595 1596
}

1597
int git_remote_connected(const git_remote *remote)
1598
{
1599
	assert(remote);
1600 1601 1602 1603 1604

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

	/* Ask the transport if it's connected. */
1605
	return remote->transport->is_connected(remote->transport);
1606 1607
}

1608 1609
void git_remote_stop(git_remote *remote)
{
1610 1611 1612
	assert(remote);

	if (remote->transport && remote->transport->cancel)
1613
		remote->transport->cancel(remote->transport);
1614 1615
}

1616 1617
void git_remote_disconnect(git_remote *remote)
{
1618 1619
	assert(remote);

1620 1621
	if (git_remote_connected(remote))
		remote->transport->close(remote->transport);
1622 1623
}

Carlos Martín Nieto committed
1624 1625
void git_remote_free(git_remote *remote)
{
1626 1627 1628
	if (remote == NULL)
		return;

1629 1630 1631 1632 1633 1634 1635 1636 1637
	if (remote->transport != NULL) {
		git_remote_disconnect(remote);

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

	git_vector_free(&remote->refs);

1638
	free_refspecs(&remote->refspecs);
1639 1640
	git_vector_free(&remote->refspecs);

1641 1642 1643
	free_refspecs(&remote->active_refspecs);
	git_vector_free(&remote->active_refspecs);

1644 1645 1646
	free_refspecs(&remote->passive_refspecs);
	git_vector_free(&remote->passive_refspecs);

1647
	git_push_free(remote->push);
1648
	git__free(remote->url);
1649
	git__free(remote->pushurl);
1650 1651
	git__free(remote->name);
	git__free(remote);
Carlos Martín Nieto committed
1652
}
1653

1654
static int remote_list_cb(const git_config_entry *entry, void *payload)
1655
{
1656
	git_vector *list = payload;
1657 1658 1659
	const char *name = entry->name + strlen("remote.");
	size_t namelen = strlen(name);
	char *remote_name;
1660

1661
	/* we know name matches "remote.<stuff>.(push)?url" */
1662

1663 1664 1665 1666
	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" */
1667
	GITERR_CHECK_ALLOC(remote_name);
1668

1669
	return git_vector_insert(list, remote_name);
1670 1671 1672 1673 1674
}

int git_remote_list(git_strarray *remotes_list, git_repository *repo)
{
	int error;
1675
	git_config *cfg;
1676
	git_vector list = GIT_VECTOR_INIT;
1677

1678 1679
	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
		return error;
1680

1681
	if ((error = git_vector_init(&list, 4, git__strcmp_cb)) < 0)
1682
		return error;
1683

1684
	error = git_config_foreach_match(
1685
		cfg, "^remote\\..*\\.(push)?url$", remote_list_cb, &list);
1686

1687
	if (error < 0) {
1688
		git_vector_free_deep(&list);
1689 1690 1691
		return error;
	}

1692
	git_vector_uniq(&list, git__free);
1693

1694 1695
	remotes_list->strings =
		(char **)git_vector_detach(&remotes_list->count, NULL, &list);
1696

1697
	return 0;
1698
}
1699

Ben Straub committed
1700
const git_transfer_progress* git_remote_stats(git_remote *remote)
1701 1702 1703 1704 1705
{
	assert(remote);
	return &remote->stats;
}

1706
git_remote_autotag_option_t git_remote_autotag(const git_remote *remote)
1707 1708 1709 1710
{
	return remote->download_tags;
}

1711
int git_remote_set_autotag(git_repository *repo, const char *remote, git_remote_autotag_option_t value)
1712
{
1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740
	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:
1741
		giterr_set(GITERR_INVALID, "invalid value for the tagopt setting");
1742 1743 1744 1745 1746
		error = -1;
	}

	git_buf_free(&var);
	return error;
1747
}
1748

1749 1750 1751 1752 1753
int git_remote_prune_refs(const git_remote *remote)
{
	return remote->prune_refs;
}

1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765
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;

1766 1767 1768
	if (new_name &&
		(git_buf_printf(&new_section_name, "remote.%s", new_name) < 0))
			goto cleanup;
1769 1770 1771 1772

	error = git_config_rename_section(
		repo,
		git_buf_cstr(&old_section_name),
1773
		new_name ? git_buf_cstr(&new_section_name) : NULL);
1774 1775 1776 1777 1778 1779 1780 1781

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

	return error;
}

1782
struct update_data {
1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796
	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;

1797 1798
	return git_config_set_string(
		data->config, entry->name, data->new_remote_name);
1799 1800 1801 1802 1803 1804 1805
}

static int update_branch_remote_config_entry(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1806 1807
	int error;
	struct update_data data = { NULL };
1808

1809 1810
	if ((error = git_repository_config__weakptr(&data.config, repo)) < 0)
		return error;
1811 1812 1813 1814

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

1815
	return git_config_foreach_match(
1816
		data.config, "branch\\..+\\.remote", update_config_entries_cb, &data);
1817 1818 1819
}

static int rename_one_remote_reference(
1820
	git_reference *reference_in,
1821 1822 1823
	const char *old_remote_name,
	const char *new_remote_name)
{
1824
	int error;
1825 1826
	git_reference *ref = NULL, *dummy = NULL;
	git_buf namespace = GIT_BUF_INIT, old_namespace = GIT_BUF_INIT;
1827
	git_buf new_name = GIT_BUF_INIT;
1828
	git_buf log_message = GIT_BUF_INIT;
1829 1830
	size_t pfx_len;
	const char *target;
1831

1832 1833 1834 1835 1836 1837
	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)
1838
		goto cleanup;
1839

1840 1841 1842 1843
	if ((error = git_buf_printf(&log_message,
					"renamed remote %s to %s",
					old_remote_name, new_remote_name)) < 0)
		goto cleanup;
1844

1845
	if ((error = git_reference_rename(&ref, reference_in, git_buf_cstr(&new_name), 1,
1846
					  git_buf_cstr(&log_message))) < 0)
1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865
		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),
1866
						  git_buf_cstr(&log_message));
1867 1868

	git_reference_free(dummy);
1869 1870

cleanup:
1871 1872 1873 1874
	git_reference_free(reference_in);
	git_reference_free(ref);
	git_buf_free(&namespace);
	git_buf_free(&old_namespace);
1875
	git_buf_free(&new_name);
1876
	git_buf_free(&log_message);
1877 1878 1879 1880 1881 1882 1883 1884
	return error;
}

static int rename_remote_references(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1885
	int error;
1886
	git_buf buf = GIT_BUF_INIT;
Vicent Marti committed
1887
	git_reference *ref;
1888
	git_reference_iterator *iter;
1889

1890
	if ((error = git_buf_printf(&buf, GIT_REFS_REMOTES_DIR "%s/*", old_name)) < 0)
1891
		return error;
1892

1893 1894
	error = git_reference_iterator_glob_new(&iter, repo, git_buf_cstr(&buf));
	git_buf_free(&buf);
1895

1896 1897 1898 1899
	if (error < 0)
		return error;

	while ((error = git_reference_next(&ref, iter)) == 0) {
1900 1901
		if ((error = rename_one_remote_reference(ref, old_name, new_name)) < 0)
			break;
1902 1903 1904
	}

	git_reference_iterator_free(iter);
1905

1906
	return (error == GIT_ITEROVER) ? 0 : error;
1907 1908
}

1909
static int rename_fetch_refspecs(git_vector *problems, git_remote *remote, const char *new_name)
1910 1911
{
	git_config *config;
1912
	git_buf base = GIT_BUF_INIT, var = GIT_BUF_INIT, val = GIT_BUF_INIT;
1913
	const git_refspec *spec;
1914
	size_t i;
1915
	int error = 0;
1916

1917
	if ((error = git_repository_config__weakptr(&config, remote->repo)) < 0)
1918 1919
		return error;

1920 1921 1922
	if ((error = git_vector_init(problems, 1, NULL)) < 0)
		return error;

1923 1924 1925
	if ((error = git_buf_printf(
			&base, "+refs/heads/*:refs/remotes/%s/*", remote->name)) < 0)
		return error;
1926

1927
	git_vector_foreach(&remote->refspecs, i, spec) {
1928 1929
		if (spec->push)
			continue;
1930

1931
		/* Does the dst part of the refspec follow the expected format? */
1932
		if (strcmp(git_buf_cstr(&base), spec->string)) {
1933
			char *dup;
1934

1935 1936 1937 1938
			dup = git__strdup(spec->string);
			GITERR_CHECK_ALLOC(dup);

			if ((error = git_vector_insert(problems, dup)) < 0)
1939
				break;
1940

1941 1942
			continue;
		}
1943

1944
		/* If we do want to move it to the new section */
1945

1946 1947
		git_buf_clear(&val);
		git_buf_clear(&var);
1948

1949 1950 1951 1952 1953
		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;
1954
			break;
1955
		}
1956

1957 1958
		if ((error = git_config_set_string(
				config, git_buf_cstr(&var), git_buf_cstr(&val))) < 0)
1959
			break;
1960
	}
1961

1962 1963 1964
	git_buf_free(&base);
	git_buf_free(&var);
	git_buf_free(&val);
1965 1966 1967 1968 1969 1970 1971 1972 1973

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

		git_vector_free(problems);
	}

1974 1975 1976
	return error;
}

1977
int git_remote_rename(git_strarray *out, git_repository *repo, const char *name, const char *new_name)
1978 1979
{
	int error;
1980
	git_vector problem_refspecs = GIT_VECTOR_INIT;
1981
	git_remote *remote = NULL;
1982

1983
	assert(out && repo && name && new_name);
1984

1985
	if ((error = git_remote_lookup(&remote, repo, name)) < 0)
1986
		return error;
1987

1988
	if ((error = ensure_remote_name_is_valid(new_name)) < 0)
1989
		goto cleanup;
1990

1991 1992
	if ((error = ensure_remote_doesnot_exist(repo, new_name)) < 0)
		goto cleanup;
1993

1994 1995
	if ((error = rename_remote_config_section(repo, name, new_name)) < 0)
		goto cleanup;
1996

1997 1998
	if ((error = update_branch_remote_config_entry(repo, name, new_name)) < 0)
		goto cleanup;
1999

2000 2001
	if ((error = rename_remote_references(repo, name, new_name)) < 0)
		goto cleanup;
2002

2003
	if ((error = rename_fetch_refspecs(&problem_refspecs, remote, new_name)) < 0)
2004
		goto cleanup;
2005

2006 2007 2008
	out->count = problem_refspecs.length;
	out->strings = (char **) problem_refspecs.contents;

2009 2010 2011
cleanup:
	if (error < 0)
		git_vector_free(&problem_refspecs);
2012

2013 2014
	git_remote_free(remote);
	return error;
2015
}
2016

2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035
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;
}
2036 2037 2038 2039 2040 2041

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

2042
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057
		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;

2058
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2059 2060 2061 2062 2063 2064 2065 2066 2067 2068
		if (spec->push)
			continue;

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

	return NULL;
}

2069
int git_remote_add_fetch(git_repository *repo, const char *remote, const char *refspec)
2070
{
2071
	return write_add_refspec(repo, remote, refspec, true);
2072 2073
}

2074
int git_remote_add_push(git_repository *repo, const char *remote, const char *refspec)
2075
{
2076
	return write_add_refspec(repo, remote, refspec, false);
2077 2078
}

2079
static int copy_refspecs(git_strarray *array, const git_remote *remote, unsigned int push)
2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092
{
	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;

2093
		if ((dup = git__strdup(spec->string)) == NULL)
2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107
			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:
2108
	git_vector_free_deep(&refspecs);
2109 2110 2111 2112

	return -1;
}

2113
int git_remote_get_fetch_refspecs(git_strarray *array, const git_remote *remote)
2114 2115 2116 2117
{
	return copy_refspecs(array, remote, false);
}

2118
int git_remote_get_push_refspecs(git_strarray *array, const git_remote *remote)
2119 2120 2121
{
	return copy_refspecs(array, remote, true);
}
2122

2123
size_t git_remote_refspec_count(const git_remote *remote)
2124 2125 2126 2127
{
	return remote->refspecs.length;
}

2128
const git_refspec *git_remote_get_refspec(const git_remote *remote, size_t n)
2129 2130 2131
{
	return git_vector_get(&remote->refspecs, n);
}
2132

2133
int git_remote_init_callbacks(git_remote_callbacks *opts, unsigned int version)
2134
{
2135 2136 2137
	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
		opts, version, git_remote_callbacks, GIT_REMOTE_CALLBACKS_INIT);
	return 0;
2138
}
2139

2140 2141
/* asserts a branch.<foo>.remote format */
static const char *name_offset(size_t *len_out, const char *name)
2142
{
2143 2144
	size_t prefix_len;
	const char *dot;
2145

2146 2147
	prefix_len = strlen("remote.");
	dot = strchr(name + prefix_len, '.');
2148

2149
	assert(dot);
2150

2151 2152
	*len_out = dot - name - prefix_len;
	return name + prefix_len;
2153 2154 2155 2156 2157 2158 2159 2160
}

static int remove_branch_config_related_entries(
	git_repository *repo,
	const char *remote_name)
{
	int error;
	git_config *config;
2161 2162 2163
	git_config_entry *entry;
	git_config_iterator *iter;
	git_buf buf = GIT_BUF_INIT;
2164 2165 2166 2167

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

2168
	if ((error = git_config_iterator_glob_new(&iter, config, "branch\\..+\\.remote")) < 0)
2169 2170
		return error;

2171 2172 2173 2174
	/* 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;
2175

2176 2177
		if (strcmp(remote_name, entry->value))
			continue;
2178

2179
		branch = name_offset(&branch_len, entry->name);
2180

2181 2182 2183 2184
		git_buf_clear(&buf);
		if (git_buf_printf(&buf, "branch.%.*s.merge", (int)branch_len, branch) < 0)
			break;

2185 2186 2187 2188 2189
		if ((error = git_config_delete_entry(config, git_buf_cstr(&buf))) < 0) {
			if (error != GIT_ENOTFOUND)
				break;
			giterr_clear();
		}
2190 2191 2192 2193 2194

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

2195 2196 2197 2198 2199
		if ((error = git_config_delete_entry(config, git_buf_cstr(&buf))) < 0) {
			if (error != GIT_ENOTFOUND)
				break;
			giterr_clear();
		}
2200 2201
	}

2202 2203 2204 2205 2206
	if (error == GIT_ITEROVER)
		error = 0;

	git_buf_free(&buf);
	git_config_iterator_free(iter);
2207 2208 2209
	return error;
}

2210
static int remove_refs(git_repository *repo, const git_refspec *spec)
2211
{
2212 2213
	git_reference_iterator *iter = NULL;
	git_vector refs;
2214
	const char *name;
2215
	char *dup;
2216
	int error;
2217
	size_t i;
2218

2219
	if ((error = git_vector_init(&refs, 8, NULL)) < 0)
2220 2221
		return error;

2222 2223 2224
	if ((error = git_reference_iterator_new(&iter, repo)) < 0)
		goto cleanup;

2225
	while ((error = git_reference_next_name(&name, iter)) == 0) {
2226 2227 2228 2229 2230 2231 2232 2233
		if (!git_refspec_dst_matches(spec, name))
			continue;

		dup = git__strdup(name);
		if (!dup) {
			error = -1;
			goto cleanup;
		}
2234

2235 2236 2237
		if ((error = git_vector_insert(&refs, dup)) < 0)
			goto cleanup;
	}
2238 2239
	if (error == GIT_ITEROVER)
		error = 0;
2240 2241 2242 2243 2244 2245 2246
	if (error < 0)
		goto cleanup;

	git_vector_foreach(&refs, i, name) {
		if ((error = git_reference_remove(repo, name)) < 0)
			break;
	}
2247

2248 2249 2250 2251 2252 2253
cleanup:
	git_reference_iterator_free(iter);
	git_vector_foreach(&refs, i, dup) {
		git__free(dup);
	}
	git_vector_free(&refs);
2254 2255 2256 2257 2258 2259 2260 2261 2262 2263
	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 */
2264
	if ((error = git_remote_lookup(&remote, repo, remote_name)) < 0)
2265 2266 2267 2268 2269 2270 2271 2272 2273 2274
		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;

2275
		if ((error = remove_refs(repo, refspec)) < 0)
2276 2277 2278 2279 2280 2281 2282
			break;
	}

	git_remote_free(remote);
	return error;
}

2283
int git_remote_delete(git_repository *repo, const char *name)
2284 2285 2286
{
	int error;

2287
	assert(repo && name);
2288

2289 2290 2291
	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)
2292 2293
		return error;

2294 2295
	return 0;
}
2296 2297 2298 2299 2300 2301 2302 2303 2304

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;

2305 2306
	assert(out);

2307 2308 2309 2310 2311 2312
	if ((error = git_remote_ls(&heads, &heads_len, remote)) < 0)
		return error;

	if (heads_len == 0)
		return GIT_ENOTFOUND;

2313 2314 2315
	if (strcmp(heads[0]->name, GIT_HEAD_FILE))
		return GIT_ENOTFOUND;

2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331
	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;

2332 2333 2334
		if (git__prefixcmp(heads[i]->name, GIT_REFS_HEADS_DIR))
			continue;

2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350
		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);
}
2351

2352
int git_remote_upload(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2353 2354
{
	size_t i;
2355 2356
	int error;
	git_push *push;
2357
	git_refspec *spec;
2358
	const git_remote_callbacks *cbs = NULL;
2359
	const git_strarray *custom_headers = NULL;
2360
	const git_proxy_options *proxy = NULL;
2361

2362
	assert(remote);
2363

2364 2365 2366 2367 2368
	if (!remote->repo) {
		giterr_set(GITERR_INVALID, "cannot download detached remote");
		return -1;
	}

2369
	if (opts) {
2370
		cbs = &opts->callbacks;
2371
		custom_headers = &opts->custom_headers;
2372
		proxy = &opts->proxy_opts;
2373
	}
2374

2375
	if (!git_remote_connected(remote) &&
2376
	    (error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, proxy, custom_headers)) < 0)
2377 2378
		goto cleanup;

2379
	free_refspecs(&remote->active_refspecs);
Leo Yang committed
2380
	if ((error = dwim_refspecs(&remote->active_refspecs, &remote->refspecs, &remote->refs)) < 0)
2381 2382
		goto cleanup;

2383 2384 2385 2386 2387 2388
	if (remote->push) {
		git_push_free(remote->push);
		remote->push = NULL;
	}

	if ((error = git_push_new(&remote->push, remote)) < 0)
2389 2390
		return error;

2391
	push = remote->push;
2392 2393 2394 2395

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

2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407
	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;
		}
2408 2409
	}

2410
	if ((error = git_push_finish(push, cbs)) < 0)
2411 2412
		goto cleanup;

2413
	if (cbs && cbs->push_update_reference &&
2414
	    (error = git_push_status_foreach(push, cbs->push_update_reference, cbs->payload)) < 0)
2415 2416 2417
		goto cleanup;

cleanup:
2418 2419 2420
	return error;
}

2421
int git_remote_push(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2422 2423
{
	int error;
2424
	const git_remote_callbacks *cbs = NULL;
2425
	const git_strarray *custom_headers = NULL;
2426
	const git_proxy_options *proxy = NULL;
2427

2428 2429 2430 2431 2432 2433 2434
	assert(remote);

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

2435 2436 2437
	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
2438
		custom_headers = &opts->custom_headers;
2439 2440
		GITERR_CHECK_VERSION(&opts->proxy_opts, GIT_PROXY_OPTIONS_VERSION, "git_proxy_options");
		proxy = &opts->proxy_opts;
2441
	}
2442

2443
	assert(remote);
2444

2445
	if ((error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, proxy, custom_headers)) < 0)
2446 2447 2448 2449 2450
		return error;

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

2451
	error = git_remote_update_tips(remote, cbs, 0, 0, NULL);
2452

2453 2454 2455
	git_remote_disconnect(remote);
	return error;
}
2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484

#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;
	}

2485 2486
	if (git_config_iterator_glob_new(&iter, config, regexp) < 0)
		return NULL;
2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520

	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;
}