remote.c 59 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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	/* name is optional */
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	assert(out && repo && url);
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	if ((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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	remote->url = apply_insteadof(config_ro, canonical_url.ptr, GIT_DIRECTION_FETCH);
	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 ((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 ((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_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;
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	void *payload = NULL;
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	git_cred_acquire_cb credentials = NULL;
	git_transport_cb transport = NULL;
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	assert(remote);

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	if (callbacks) {
		GITERR_CHECK_VERSION(callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		credentials = callbacks->credentials;
665
		transport   = callbacks->transport;
666 667 668
		payload     = callbacks->payload;
	}

669 670 671
	if (proxy)
		GITERR_CHECK_VERSION(proxy, GIT_PROXY_OPTIONS_VERSION, "git_proxy_options");

672 673
	t = remote->transport;

674
	url = git_remote__urlfordirection(remote, direction);
675
	if (url == NULL) {
676 677
		giterr_set(GITERR_INVALID,
			"Malformed remote '%s' - missing URL", remote->name);
678
		return -1;
679
	}
680

681 682
	/* If we don't have a transport object yet, and the caller specified a
	 * custom transport factory, use that */
683 684
	if (!t && transport &&
		(error = transport(&t, remote, payload)) < 0)
685 686 687 688
		return error;

	/* If we still don't have a transport, then use the global
	 * transport registrations which map URI schemes to transport factories */
689 690
	if (!t && (error = git_transport_new(&t, remote, url)) < 0)
		return error;
691

692 693 694
	if ((error = set_transport_custom_headers(t, custom_headers)) != 0)
		goto on_error;

695
	if ((error = set_transport_callbacks(t, callbacks)) < 0 ||
696
	    (error = t->connect(t, url, credentials, payload, proxy, direction, flags)) != 0)
697
		goto on_error;
698 699 700

	remote->transport = t;

701
	return 0;
702

703 704
on_error:
	t->free(t);
705 706 707 708

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

709
	return error;
710 711
}

712
int git_remote_ls(const git_remote_head ***out, size_t *size, git_remote *remote)
713
{
714 715
	assert(remote);

716
	if (!remote->transport) {
717
		giterr_set(GITERR_NET, "this remote has never connected");
718 719 720
		return -1;
	}

721
	return remote->transport->ls(out, size, remote->transport);
722 723
}

724 725 726
int git_remote__get_http_proxy(git_remote *remote, bool use_ssl, char **proxy_url)
{
	git_config *cfg;
727
	git_config_entry *ce = NULL;
728
	git_buf val = GIT_BUF_INIT;
729
	int error;
730 731 732

	assert(remote);

733
	if (!proxy_url || !remote->repo)
734 735 736 737
		return -1;

	*proxy_url = NULL;

738 739
	if ((error = git_repository_config__weakptr(&cfg, remote->repo)) < 0)
		return error;
740 741 742 743 744

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

	/* remote.<name>.proxy config setting */
745
	if (remote->name && remote->name[0]) {
746 747
		git_buf buf = GIT_BUF_INIT;

748 749
		if ((error = git_buf_printf(&buf, "remote.%s.proxy", remote->name)) < 0)
			return error;
750

751 752
		error = git_config__lookup_entry(&ce, cfg, git_buf_cstr(&buf), false);
		git_buf_free(&buf);
753

754
		if (error < 0)
755
			return error;
756

757
		if (ce && ce->value) {
758
			*proxy_url = git__strdup(ce->value);
759 760
			goto found;
		}
761 762 763
	}

	/* http.proxy config setting */
764
	if ((error = git_config__lookup_entry(&ce, cfg, "http.proxy", false)) < 0)
765
		return error;
766

767
	if (ce && ce->value) {
768
		*proxy_url = git__strdup(ce->value);
769 770
		goto found;
	}
771

772 773
	/* http_proxy / https_proxy environment variables */
	error = git__getenv(&val, use_ssl ? "https_proxy" : "http_proxy");
774

775 776
	/* try uppercase environment variables */
	if (error == GIT_ENOTFOUND)
777
		error = git__getenv(&val, use_ssl ? "HTTPS_PROXY" : "HTTP_PROXY");
778 779

	if (error < 0) {
780 781 782 783 784 785
		if (error == GIT_ENOTFOUND) {
			giterr_clear();
			error = 0;
		}

		return error;
786
	}
787 788 789 790 791

	*proxy_url = git_buf_detach(&val);

found:
	GITERR_CHECK_ALLOC(*proxy_url);
792
	git_config_entry_free(ce);
793 794 795 796

	return 0;
}

797 798
/* DWIM `refspecs` based on `refs` and append the output to `out` */
static int dwim_refspecs(git_vector *out, git_vector *refspecs, git_vector *refs)
799
{
800
	size_t i;
801 802 803
	git_refspec *spec;

	git_vector_foreach(refspecs, i, spec) {
804 805 806
		if (git_refspec__dwim_one(out, spec, refs) < 0)
			return -1;
	}
807

808 809
	return 0;
}
810

811 812 813 814
static void free_refspecs(git_vector *vec)
{
	size_t i;
	git_refspec *spec;
815

816 817 818
	git_vector_foreach(vec, i, spec) {
		git_refspec__free(spec);
		git__free(spec);
819 820
	}

821
	git_vector_clear(vec);
822 823 824 825 826 827 828 829 830 831
}

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);
}

832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850
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;
}

851
int git_remote_download(git_remote *remote, const git_strarray *refspecs, const git_fetch_options *opts)
852
{
853
	int error = -1;
854
	size_t i;
855
	git_vector *to_active, specs = GIT_VECTOR_INIT, refs = GIT_VECTOR_INIT;
856
	const git_remote_callbacks *cbs = NULL;
857
	const git_strarray *custom_headers = NULL;
858
	const git_proxy_options *proxy = NULL;
859

860
	assert(remote);
861

862 863 864
	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
865
		custom_headers = &opts->custom_headers;
866 867
		GITERR_CHECK_VERSION(&opts->proxy_opts, GIT_PROXY_OPTIONS_VERSION, "git_proxy_options");
		proxy = &opts->proxy_opts;
868 869 870
	}

	if (!git_remote_connected(remote) &&
871
	    (error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs, proxy, custom_headers)) < 0)
872 873
		goto on_error;

874
	if (ls_to_vector(&refs, remote) < 0)
875 876
		return -1;

877 878 879
	if ((git_vector_init(&specs, 0, NULL)) < 0)
		goto on_error;

880
	remote->passed_refspecs = 0;
881
	if (!refspecs || !refspecs->count) {
882 883 884 885 886 887 888 889
		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;
890
		remote->passed_refspecs = 1;
891 892
	}

893 894 895
	free_refspecs(&remote->passive_refspecs);
	if ((error = dwim_refspecs(&remote->passive_refspecs, &remote->refspecs, &refs)) < 0)
		goto on_error;
896

897
	free_refspecs(&remote->active_refspecs);
898
	error = dwim_refspecs(&remote->active_refspecs, to_active, &refs);
899

900
	git_vector_free(&refs);
901 902
	free_refspecs(&specs);
	git_vector_free(&specs);
903 904

	if (error < 0)
905
		return error;
906

907 908 909 910 911
	if (remote->push) {
		git_push_free(remote->push);
		remote->push = NULL;
	}

912
	if ((error = git_fetch_negotiate(remote, opts)) < 0)
913
		return error;
914

915
	return git_fetch_download_pack(remote, cbs);
916 917 918 919 920 921

on_error:
	git_vector_free(&refs);
	free_refspecs(&specs);
	git_vector_free(&specs);
	return error;
922 923
}

924 925
int git_remote_fetch(
		git_remote *remote,
926
		const git_strarray *refspecs,
927
		const git_fetch_options *opts,
928
		const char *reflog_message)
929
{
930
	int error, update_fetchhead = 1;
931
	git_remote_autotag_option_t tagopt = remote->download_tags;
932
	bool prune = false;
933
	git_buf reflog_msg_buf = GIT_BUF_INIT;
934
	const git_remote_callbacks *cbs = NULL;
935
	const git_strarray *custom_headers = NULL;
936
	const git_proxy_options *proxy = NULL;
937 938 939 940

	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
941
		custom_headers = &opts->custom_headers;
942
		update_fetchhead = opts->update_fetchhead;
943
		tagopt = opts->download_tags;
944 945
		GITERR_CHECK_VERSION(&opts->proxy_opts, GIT_PROXY_OPTIONS_VERSION, "git_proxy_options");
		proxy = &opts->proxy_opts;
946
	}
947 948

	/* Connect and download everything */
949
	if ((error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs, proxy, custom_headers)) != 0)
950 951
		return error;

952
	error = git_remote_download(remote, refspecs, opts);
953 954 955 956

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

957 958 959 960
	/* If the download failed, return the error */
	if (error != 0)
		return error;

961 962 963 964 965 966 967 968
	/* 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);
	}

969
	/* Create "remote/foo" branches for all remote branches */
970
	error = git_remote_update_tips(remote, cbs, update_fetchhead, tagopt, git_buf_cstr(&reflog_msg_buf));
971
	git_buf_free(&reflog_msg_buf);
972 973 974
	if (error < 0)
		return error;

975 976
	if (opts && opts->prune == GIT_FETCH_PRUNE)
		prune = true;
977
	else if (opts && opts->prune == GIT_FETCH_PRUNE_UNSPECIFIED && remote->prune_refs)
978 979 980 981 982 983 984
		prune = true;
	else if (opts && opts->prune == GIT_FETCH_NO_PRUNE)
		prune = false;
	else
		prune = remote->prune_refs;

	if (prune)
985
		error = git_remote_prune(remote, cbs);
986

987
	return error;
988 989
}

990 991 992 993 994 995 996 997
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
998 999 1000 1001 1002

	git_vector_foreach(update_heads, i, remote_ref) {
		if (strcmp(remote_ref->name, fetchspec_src) == 0) {
			*out = remote_ref;
			break;
1003 1004 1005 1006 1007 1008
		}
	}

	return 0;
}

1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040
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;
}

1041
static int remote_head_for_ref(git_remote_head **out, git_remote *remote, git_refspec *spec, git_vector *update_heads, git_reference *ref)
1042 1043 1044
{
	git_reference *resolved_ref = NULL;
	git_buf remote_name = GIT_BUF_INIT;
1045
	git_config *config = NULL;
1046
	const char *ref_name;
1047
	int error = 0, update;
1048

1049
	assert(out && spec && ref);
1050 1051 1052

	*out = NULL;

1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
	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);
	}

1063
	if ((error = ref_to_update(&update, &remote_name, remote, spec, ref_name)) < 0)
1064 1065
		goto cleanup;

1066 1067
	if (update)
		error = remote_head_for_fetchspec_src(out, update_heads, git_buf_cstr(&remote_name));
1068 1069

cleanup:
Carlos Martín Nieto committed
1070
	git_buf_free(&remote_name);
1071
	git_reference_free(resolved_ref);
1072
	git_config_free(config);
1073 1074 1075
	return error;
}

1076
static int git_remote_write_fetchhead(git_remote *remote, git_refspec *spec, git_vector *update_heads)
1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087
{
	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);

1088 1089 1090 1091
	/* no heads, nothing to do */
	if (update_heads->length == 0)
		return 0;

1092 1093 1094 1095 1096 1097 1098 1099 1100
	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 ||
1101
			(error = remote_head_for_ref(&merge_remote_ref, remote, spec, update_heads, head_ref)) < 0)
1102 1103 1104 1105 1106 1107 1108 1109
				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
1110
	git_vector_foreach(update_heads, i, remote_ref) {
1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
		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;
}

1141 1142 1143 1144 1145
/**
 * 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)
1146 1147
{
	git_strarray arr = { 0 };
1148
	size_t i;
1149 1150 1151 1152 1153
	int error;

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

1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180
	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);
}

1181
int git_remote_prune(git_remote *remote, const git_remote_callbacks *callbacks)
1182 1183 1184 1185 1186 1187 1188 1189 1190
{
	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 }};

1191 1192 1193
	if (callbacks)
		GITERR_CHECK_VERSION(callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");

1194 1195 1196
	if ((error = ls_to_vector(&remote_refs, remote)) < 0)
		goto cleanup;

1197
	git_vector_set_cmp(&remote_refs, find_head);
1198

1199 1200
	if ((error = prune_candidates(&candidates, remote)) < 0)
		goto cleanup;
1201

1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
	/*
	 * 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))
1214 1215
				continue;

1216 1217
			if ((error = git_refspec_rtransform(&buf, spec, refname)) < 0)
				goto cleanup;
1218

1219 1220 1221
			key.name = (char *) git_buf_cstr(&buf);
			error = git_vector_search(&pos, &remote_refs, &key);
			git_buf_free(&buf);
1222

1223 1224
			if (error < 0 && error != GIT_ENOTFOUND)
				goto cleanup;
1225

1226
			if (error == GIT_ENOTFOUND)
1227 1228
				continue;

1229 1230 1231 1232 1233 1234
			/* 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;
1235 1236 1237
		}
	}

1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
	/*
	 * 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;

1270 1271
		if (callbacks && callbacks->update_tips)
			error = callbacks->update_tips(refname, &id, &zero_id, callbacks->payload);
1272 1273 1274 1275 1276

		if (error < 0)
			goto cleanup;
	}

1277 1278
cleanup:
	git_vector_free(&remote_refs);
1279
	git_vector_free_deep(&candidates);
1280 1281 1282
	return error;
}

1283 1284
static int update_tips_for_spec(
		git_remote *remote,
1285
		const git_remote_callbacks *callbacks,
1286
		int update_fetchhead,
1287
		git_remote_autotag_option_t tagopt,
1288 1289 1290
		git_refspec *spec,
		git_vector *refs,
		const char *log_message)
1291
{
1292
	int error = 0, autotag;
1293
	unsigned int i = 0;
1294
	git_buf refname = GIT_BUF_INIT;
1295
	git_oid old;
1296
	git_odb *odb;
1297 1298
	git_remote_head *head;
	git_reference *ref;
1299
	git_refspec tagspec;
1300
	git_vector update_heads;
1301

1302 1303
	assert(remote);

1304
	if (git_repository_odb__weakptr(&odb, remote->repo) < 0)
1305 1306
		return -1;

1307
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
1308 1309
		return -1;

1310
	/* Make a copy of the transport's refs */
1311
	if (git_vector_init(&update_heads, 16, NULL) < 0)
1312
		return -1;
1313

1314 1315
	for (; i < refs->length; ++i) {
		head = git_vector_get(refs, i);
1316
		autotag = 0;
1317
		git_buf_clear(&refname);
1318

1319 1320 1321 1322
		/* Ignore malformed ref names (which also saves us from tag^{} */
		if (!git_reference_is_valid_name(head->name))
			continue;

1323
		/* If we have a tag, see if the auto-follow rules say to update it */
1324
		if (git_refspec_src_matches(&tagspec, head->name)) {
1325
			if (tagopt != GIT_REMOTE_DOWNLOAD_TAGS_NONE) {
1326

1327
				if (tagopt == GIT_REMOTE_DOWNLOAD_TAGS_AUTO)
1328
					autotag = 1;
1329

1330 1331 1332 1333
				git_buf_clear(&refname);
				if (git_buf_puts(&refname, head->name) < 0)
					goto on_error;
			}
1334 1335 1336 1337
		}

		/* If we didn't want to auto-follow the tag, check if the refspec matches */
		if (!autotag && git_refspec_src_matches(spec, head->name)) {
1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350
			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;
			}
1351 1352 1353 1354
		}

		/* If we still don't have a refname, we don't want it */
		if (git_buf_len(&refname) == 0) {
1355 1356 1357
			continue;
		}

1358
		/* In autotag mode, only create tags for objects already in db */
1359 1360
		if (autotag && !git_odb_exists(odb, &head->oid))
			continue;
1361

1362
		if (!autotag && git_vector_insert(&update_heads, head) < 0)
1363 1364
			goto on_error;

1365
		error = git_reference_name_to_id(&old, remote->repo, refname.ptr);
1366
		if (error < 0 && error != GIT_ENOTFOUND)
1367 1368
			goto on_error;

1369
		if (error == GIT_ENOTFOUND) {
1370 1371
			memset(&old, 0, GIT_OID_RAWSZ);

1372 1373 1374 1375
			if (autotag && git_vector_insert(&update_heads, head) < 0)
				goto on_error;
		}

1376
		if (!git_oid__cmp(&old, &head->oid))
1377
			continue;
1378

1379
		/* In autotag mode, don't overwrite any locally-existing tags */
1380
		error = git_reference_create(&ref, remote->repo, refname.ptr, &head->oid, !autotag, 
1381
				log_message);
1382 1383 1384 1385 1386

		if (error == GIT_EEXISTS)
			continue;

		if (error < 0)
1387
			goto on_error;
1388 1389

		git_reference_free(ref);
1390

1391 1392
		if (callbacks && callbacks->update_tips != NULL) {
			if (callbacks->update_tips(refname.ptr, &old, &head->oid, callbacks->payload) < 0)
1393 1394
				goto on_error;
		}
1395 1396
	}

1397
	if (update_fetchhead &&
1398
	    (error = git_remote_write_fetchhead(remote, spec, &update_heads)) < 0)
1399 1400 1401
		goto on_error;

	git_vector_free(&update_heads);
1402
	git_refspec__free(&tagspec);
1403
	git_buf_free(&refname);
1404 1405 1406
	return 0;

on_error:
1407
	git_vector_free(&update_heads);
1408
	git_refspec__free(&tagspec);
1409 1410
	git_buf_free(&refname);
	return -1;
1411

1412 1413
}

1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 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
/**
 * 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;
}

1471 1472
static int opportunistic_updates(const git_remote *remote, const git_remote_callbacks *callbacks,
				 git_vector *refs, const char *msg)
1473 1474 1475 1476 1477 1478
{
	size_t i, j, k;
	git_refspec *spec;
	git_remote_head *head;
	git_reference *ref;
	git_buf refname = GIT_BUF_INIT;
1479
	int error = 0;
1480 1481 1482 1483

	i = j = k = 0;

	while ((error = next_head(remote, refs, &spec, &head, &i, &j, &k)) == 0) {
1484
		git_oid old = {{ 0 }};
1485 1486 1487 1488 1489 1490 1491 1492
		/*
		 * 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
		 */

1493
		git_buf_clear(&refname);
1494
		if ((error = git_refspec_transform(&refname, spec, head->name)) < 0)
1495
			goto cleanup;
1496

1497 1498 1499 1500 1501 1502
		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;
1503

1504 1505 1506 1507 1508 1509
		/* 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);
1510
		if (error < 0)
1511 1512 1513 1514 1515 1516
			goto cleanup;

		if (callbacks && callbacks->update_tips != NULL) {
			if (callbacks->update_tips(refname.ptr, &old, &head->oid, callbacks->payload) < 0)
				goto cleanup;
		}
1517 1518
	}

1519 1520 1521 1522 1523 1524
	if (error == GIT_ITEROVER)
		error = 0;

cleanup:
	git_buf_free(&refname);
	return error;
1525 1526
}

1527 1528
int git_remote_update_tips(
		git_remote *remote,
1529
		const git_remote_callbacks *callbacks,
1530
		int update_fetchhead,
1531
		git_remote_autotag_option_t download_tags,
1532
		const char *reflog_message)
1533
{
1534
	git_refspec *spec, tagspec;
1535
	git_vector refs = GIT_VECTOR_INIT;
1536
	git_remote_autotag_option_t tagopt;
1537
	int error;
1538 1539
	size_t i;

1540 1541
	/* push has its own logic hidden away in the push object */
	if (remote->push) {
1542
		return git_push_update_tips(remote->push, callbacks);
1543 1544
	}

1545 1546 1547
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
		return -1;

1548 1549

	if ((error = ls_to_vector(&refs, remote)) < 0)
1550 1551
		goto out;

1552
	if (download_tags == GIT_REMOTE_DOWNLOAD_TAGS_UNSPECIFIED)
1553 1554 1555 1556 1557 1558
		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)
1559
			goto out;
1560
	}
1561

1562
	git_vector_foreach(&remote->active_refspecs, i, spec) {
1563 1564 1565
		if (spec->push)
			continue;

1566
		if ((error = update_tips_for_spec(remote, callbacks, update_fetchhead, tagopt, spec, &refs, reflog_message)) < 0)
1567
			goto out;
1568 1569
	}

1570 1571
	/* only try to do opportunisitic updates if the refpec lists differ */
	if (remote->passed_refspecs)
1572
		error = opportunistic_updates(remote, callbacks, &refs, reflog_message);
1573

1574
out:
1575
	git_vector_free(&refs);
1576 1577
	git_refspec__free(&tagspec);
	return error;
1578 1579
}

1580
int git_remote_connected(const git_remote *remote)
1581
{
1582
	assert(remote);
1583 1584 1585 1586 1587

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

	/* Ask the transport if it's connected. */
1588
	return remote->transport->is_connected(remote->transport);
1589 1590
}

1591 1592
void git_remote_stop(git_remote *remote)
{
1593 1594 1595
	assert(remote);

	if (remote->transport && remote->transport->cancel)
1596
		remote->transport->cancel(remote->transport);
1597 1598
}

1599 1600
void git_remote_disconnect(git_remote *remote)
{
1601 1602
	assert(remote);

1603 1604
	if (git_remote_connected(remote))
		remote->transport->close(remote->transport);
1605 1606
}

Carlos Martín Nieto committed
1607 1608
void git_remote_free(git_remote *remote)
{
1609 1610 1611
	if (remote == NULL)
		return;

1612 1613 1614 1615 1616 1617 1618 1619 1620
	if (remote->transport != NULL) {
		git_remote_disconnect(remote);

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

	git_vector_free(&remote->refs);

1621
	free_refspecs(&remote->refspecs);
1622 1623
	git_vector_free(&remote->refspecs);

1624 1625 1626
	free_refspecs(&remote->active_refspecs);
	git_vector_free(&remote->active_refspecs);

1627 1628 1629
	free_refspecs(&remote->passive_refspecs);
	git_vector_free(&remote->passive_refspecs);

1630
	git_push_free(remote->push);
1631
	git__free(remote->url);
1632
	git__free(remote->pushurl);
1633 1634
	git__free(remote->name);
	git__free(remote);
Carlos Martín Nieto committed
1635
}
1636

1637
static int remote_list_cb(const git_config_entry *entry, void *payload)
1638
{
1639
	git_vector *list = payload;
1640 1641 1642
	const char *name = entry->name + strlen("remote.");
	size_t namelen = strlen(name);
	char *remote_name;
1643

1644
	/* we know name matches "remote.<stuff>.(push)?url" */
1645

1646 1647 1648 1649
	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" */
1650
	GITERR_CHECK_ALLOC(remote_name);
1651

1652
	return git_vector_insert(list, remote_name);
1653 1654 1655 1656 1657
}

int git_remote_list(git_strarray *remotes_list, git_repository *repo)
{
	int error;
1658
	git_config *cfg;
1659
	git_vector list = GIT_VECTOR_INIT;
1660

1661 1662
	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
		return error;
1663

1664
	if ((error = git_vector_init(&list, 4, git__strcmp_cb)) < 0)
1665
		return error;
1666

1667
	error = git_config_foreach_match(
1668
		cfg, "^remote\\..*\\.(push)?url$", remote_list_cb, &list);
1669

1670
	if (error < 0) {
1671
		git_vector_free_deep(&list);
1672 1673 1674
		return error;
	}

1675
	git_vector_uniq(&list, git__free);
1676

1677 1678
	remotes_list->strings =
		(char **)git_vector_detach(&remotes_list->count, NULL, &list);
1679

1680
	return 0;
1681
}
1682

Ben Straub committed
1683
const git_transfer_progress* git_remote_stats(git_remote *remote)
1684 1685 1686 1687 1688
{
	assert(remote);
	return &remote->stats;
}

1689
git_remote_autotag_option_t git_remote_autotag(const git_remote *remote)
1690 1691 1692 1693
{
	return remote->download_tags;
}

1694
int git_remote_set_autotag(git_repository *repo, const char *remote, git_remote_autotag_option_t value)
1695
{
1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723
	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:
1724
		giterr_set(GITERR_INVALID, "invalid value for the tagopt setting");
1725 1726 1727 1728 1729
		error = -1;
	}

	git_buf_free(&var);
	return error;
1730
}
1731

1732 1733 1734 1735 1736
int git_remote_prune_refs(const git_remote *remote)
{
	return remote->prune_refs;
}

1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748
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;

1749 1750 1751
	if (new_name &&
		(git_buf_printf(&new_section_name, "remote.%s", new_name) < 0))
			goto cleanup;
1752 1753 1754 1755

	error = git_config_rename_section(
		repo,
		git_buf_cstr(&old_section_name),
1756
		new_name ? git_buf_cstr(&new_section_name) : NULL);
1757 1758 1759 1760 1761 1762 1763 1764

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

	return error;
}

1765
struct update_data {
1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779
	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;

1780 1781
	return git_config_set_string(
		data->config, entry->name, data->new_remote_name);
1782 1783 1784 1785 1786 1787 1788
}

static int update_branch_remote_config_entry(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1789 1790
	int error;
	struct update_data data = { NULL };
1791

1792 1793
	if ((error = git_repository_config__weakptr(&data.config, repo)) < 0)
		return error;
1794 1795 1796 1797

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

1798
	return git_config_foreach_match(
1799
		data.config, "branch\\..+\\.remote", update_config_entries_cb, &data);
1800 1801 1802
}

static int rename_one_remote_reference(
1803
	git_reference *reference_in,
1804 1805 1806
	const char *old_remote_name,
	const char *new_remote_name)
{
1807
	int error;
1808 1809
	git_reference *ref = NULL, *dummy = NULL;
	git_buf namespace = GIT_BUF_INIT, old_namespace = GIT_BUF_INIT;
1810
	git_buf new_name = GIT_BUF_INIT;
1811
	git_buf log_message = GIT_BUF_INIT;
1812 1813
	size_t pfx_len;
	const char *target;
1814

1815 1816 1817 1818 1819 1820
	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)
1821
		goto cleanup;
1822

1823 1824 1825 1826
	if ((error = git_buf_printf(&log_message,
					"renamed remote %s to %s",
					old_remote_name, new_remote_name)) < 0)
		goto cleanup;
1827

1828
	if ((error = git_reference_rename(&ref, reference_in, git_buf_cstr(&new_name), 1,
1829
					  git_buf_cstr(&log_message))) < 0)
1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848
		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),
1849
						  git_buf_cstr(&log_message));
1850 1851

	git_reference_free(dummy);
1852 1853

cleanup:
1854 1855 1856 1857
	git_reference_free(reference_in);
	git_reference_free(ref);
	git_buf_free(&namespace);
	git_buf_free(&old_namespace);
1858
	git_buf_free(&new_name);
1859
	git_buf_free(&log_message);
1860 1861 1862 1863 1864 1865 1866 1867
	return error;
}

static int rename_remote_references(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1868
	int error;
1869
	git_buf buf = GIT_BUF_INIT;
Vicent Marti committed
1870
	git_reference *ref;
1871
	git_reference_iterator *iter;
1872

1873
	if ((error = git_buf_printf(&buf, GIT_REFS_REMOTES_DIR "%s/*", old_name)) < 0)
1874
		return error;
1875

1876 1877
	error = git_reference_iterator_glob_new(&iter, repo, git_buf_cstr(&buf));
	git_buf_free(&buf);
1878

1879 1880 1881 1882
	if (error < 0)
		return error;

	while ((error = git_reference_next(&ref, iter)) == 0) {
1883 1884
		if ((error = rename_one_remote_reference(ref, old_name, new_name)) < 0)
			break;
1885 1886 1887
	}

	git_reference_iterator_free(iter);
1888

1889
	return (error == GIT_ITEROVER) ? 0 : error;
1890 1891
}

1892
static int rename_fetch_refspecs(git_vector *problems, git_remote *remote, const char *new_name)
1893 1894
{
	git_config *config;
1895
	git_buf base = GIT_BUF_INIT, var = GIT_BUF_INIT, val = GIT_BUF_INIT;
1896
	const git_refspec *spec;
1897
	size_t i;
1898
	int error = 0;
1899

1900
	if ((error = git_repository_config__weakptr(&config, remote->repo)) < 0)
1901 1902
		return error;

1903 1904 1905
	if ((error = git_vector_init(problems, 1, NULL)) < 0)
		return error;

1906 1907 1908
	if ((error = git_buf_printf(
			&base, "+refs/heads/*:refs/remotes/%s/*", remote->name)) < 0)
		return error;
1909

1910
	git_vector_foreach(&remote->refspecs, i, spec) {
1911 1912
		if (spec->push)
			continue;
1913

1914
		/* Does the dst part of the refspec follow the expected format? */
1915
		if (strcmp(git_buf_cstr(&base), spec->string)) {
1916
			char *dup;
1917

1918 1919 1920 1921
			dup = git__strdup(spec->string);
			GITERR_CHECK_ALLOC(dup);

			if ((error = git_vector_insert(problems, dup)) < 0)
1922
				break;
1923

1924 1925
			continue;
		}
1926

1927
		/* If we do want to move it to the new section */
1928

1929 1930
		git_buf_clear(&val);
		git_buf_clear(&var);
1931

1932 1933 1934 1935 1936
		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;
1937
			break;
1938
		}
1939

1940 1941
		if ((error = git_config_set_string(
				config, git_buf_cstr(&var), git_buf_cstr(&val))) < 0)
1942
			break;
1943
	}
1944

1945 1946 1947
	git_buf_free(&base);
	git_buf_free(&var);
	git_buf_free(&val);
1948 1949 1950 1951 1952 1953 1954 1955 1956

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

		git_vector_free(problems);
	}

1957 1958 1959
	return error;
}

1960
int git_remote_rename(git_strarray *out, git_repository *repo, const char *name, const char *new_name)
1961 1962
{
	int error;
1963
	git_vector problem_refspecs = GIT_VECTOR_INIT;
1964
	git_remote *remote = NULL;
1965

1966
	assert(out && repo && name && new_name);
1967

1968
	if ((error = git_remote_lookup(&remote, repo, name)) < 0)
1969
		return error;
1970

1971
	if ((error = ensure_remote_name_is_valid(new_name)) < 0)
1972
		goto cleanup;
1973

1974 1975
	if ((error = ensure_remote_doesnot_exist(repo, new_name)) < 0)
		goto cleanup;
1976

1977 1978
	if ((error = rename_remote_config_section(repo, name, new_name)) < 0)
		goto cleanup;
1979

1980 1981
	if ((error = update_branch_remote_config_entry(repo, name, new_name)) < 0)
		goto cleanup;
1982

1983 1984
	if ((error = rename_remote_references(repo, name, new_name)) < 0)
		goto cleanup;
1985

1986
	if ((error = rename_fetch_refspecs(&problem_refspecs, remote, new_name)) < 0)
1987
		goto cleanup;
1988

1989 1990 1991
	out->count = problem_refspecs.length;
	out->strings = (char **) problem_refspecs.contents;

1992 1993 1994
cleanup:
	if (error < 0)
		git_vector_free(&problem_refspecs);
1995

1996 1997
	git_remote_free(remote);
	return error;
1998
}
1999

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
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;
}
2019 2020 2021 2022 2023 2024

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

2025
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040
		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;

2041
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2042 2043 2044 2045 2046 2047 2048 2049 2050 2051
		if (spec->push)
			continue;

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

	return NULL;
}

2052
int git_remote_add_fetch(git_repository *repo, const char *remote, const char *refspec)
2053
{
2054
	return write_add_refspec(repo, remote, refspec, true);
2055 2056
}

2057
int git_remote_add_push(git_repository *repo, const char *remote, const char *refspec)
2058
{
2059
	return write_add_refspec(repo, remote, refspec, false);
2060 2061
}

2062
static int copy_refspecs(git_strarray *array, const git_remote *remote, unsigned int push)
2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075
{
	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;

2076
		if ((dup = git__strdup(spec->string)) == NULL)
2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090
			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:
2091
	git_vector_free_deep(&refspecs);
2092 2093 2094 2095

	return -1;
}

2096
int git_remote_get_fetch_refspecs(git_strarray *array, const git_remote *remote)
2097 2098 2099 2100
{
	return copy_refspecs(array, remote, false);
}

2101
int git_remote_get_push_refspecs(git_strarray *array, const git_remote *remote)
2102 2103 2104
{
	return copy_refspecs(array, remote, true);
}
2105

2106
size_t git_remote_refspec_count(const git_remote *remote)
2107 2108 2109 2110
{
	return remote->refspecs.length;
}

2111
const git_refspec *git_remote_get_refspec(const git_remote *remote, size_t n)
2112 2113 2114
{
	return git_vector_get(&remote->refspecs, n);
}
2115

2116
int git_remote_init_callbacks(git_remote_callbacks *opts, unsigned int version)
2117
{
2118 2119 2120
	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
		opts, version, git_remote_callbacks, GIT_REMOTE_CALLBACKS_INIT);
	return 0;
2121
}
2122

2123 2124
/* asserts a branch.<foo>.remote format */
static const char *name_offset(size_t *len_out, const char *name)
2125
{
2126 2127
	size_t prefix_len;
	const char *dot;
2128

2129 2130
	prefix_len = strlen("remote.");
	dot = strchr(name + prefix_len, '.');
2131

2132
	assert(dot);
2133

2134 2135
	*len_out = dot - name - prefix_len;
	return name + prefix_len;
2136 2137 2138 2139 2140 2141 2142 2143
}

static int remove_branch_config_related_entries(
	git_repository *repo,
	const char *remote_name)
{
	int error;
	git_config *config;
2144 2145 2146
	git_config_entry *entry;
	git_config_iterator *iter;
	git_buf buf = GIT_BUF_INIT;
2147 2148 2149 2150

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

2151
	if ((error = git_config_iterator_glob_new(&iter, config, "branch\\..+\\.remote")) < 0)
2152 2153
		return error;

2154 2155 2156 2157
	/* 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;
2158

2159 2160
		if (strcmp(remote_name, entry->value))
			continue;
2161

2162
		branch = name_offset(&branch_len, entry->name);
2163

2164 2165 2166 2167
		git_buf_clear(&buf);
		if (git_buf_printf(&buf, "branch.%.*s.merge", (int)branch_len, branch) < 0)
			break;

2168 2169 2170 2171 2172
		if ((error = git_config_delete_entry(config, git_buf_cstr(&buf))) < 0) {
			if (error != GIT_ENOTFOUND)
				break;
			giterr_clear();
		}
2173 2174 2175 2176 2177

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

2178 2179 2180 2181 2182
		if ((error = git_config_delete_entry(config, git_buf_cstr(&buf))) < 0) {
			if (error != GIT_ENOTFOUND)
				break;
			giterr_clear();
		}
2183 2184
	}

2185 2186 2187 2188 2189
	if (error == GIT_ITEROVER)
		error = 0;

	git_buf_free(&buf);
	git_config_iterator_free(iter);
2190 2191 2192
	return error;
}

2193
static int remove_refs(git_repository *repo, const git_refspec *spec)
2194
{
2195 2196
	git_reference_iterator *iter = NULL;
	git_vector refs;
2197
	const char *name;
2198
	char *dup;
2199
	int error;
2200
	size_t i;
2201

2202
	if ((error = git_vector_init(&refs, 8, NULL)) < 0)
2203 2204
		return error;

2205 2206 2207
	if ((error = git_reference_iterator_new(&iter, repo)) < 0)
		goto cleanup;

2208
	while ((error = git_reference_next_name(&name, iter)) == 0) {
2209 2210 2211 2212 2213 2214 2215 2216
		if (!git_refspec_dst_matches(spec, name))
			continue;

		dup = git__strdup(name);
		if (!dup) {
			error = -1;
			goto cleanup;
		}
2217

2218 2219 2220
		if ((error = git_vector_insert(&refs, dup)) < 0)
			goto cleanup;
	}
2221 2222
	if (error == GIT_ITEROVER)
		error = 0;
2223 2224 2225 2226 2227 2228 2229
	if (error < 0)
		goto cleanup;

	git_vector_foreach(&refs, i, name) {
		if ((error = git_reference_remove(repo, name)) < 0)
			break;
	}
2230

2231 2232 2233 2234 2235 2236
cleanup:
	git_reference_iterator_free(iter);
	git_vector_foreach(&refs, i, dup) {
		git__free(dup);
	}
	git_vector_free(&refs);
2237 2238 2239 2240 2241 2242 2243 2244 2245 2246
	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 */
2247
	if ((error = git_remote_lookup(&remote, repo, remote_name)) < 0)
2248 2249 2250 2251 2252 2253 2254 2255 2256 2257
		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;

2258
		if ((error = remove_refs(repo, refspec)) < 0)
2259 2260 2261 2262 2263 2264 2265
			break;
	}

	git_remote_free(remote);
	return error;
}

2266
int git_remote_delete(git_repository *repo, const char *name)
2267 2268 2269
{
	int error;

2270
	assert(repo && name);
2271

2272 2273 2274
	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)
2275 2276
		return error;

2277 2278
	return 0;
}
2279 2280 2281 2282 2283 2284 2285 2286 2287

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;

2288 2289
	assert(out);

2290 2291 2292 2293 2294 2295
	if ((error = git_remote_ls(&heads, &heads_len, remote)) < 0)
		return error;

	if (heads_len == 0)
		return GIT_ENOTFOUND;

2296 2297 2298
	if (strcmp(heads[0]->name, GIT_HEAD_FILE))
		return GIT_ENOTFOUND;

2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314
	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;

2315 2316 2317
		if (git__prefixcmp(heads[i]->name, GIT_REFS_HEADS_DIR))
			continue;

2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333
		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);
}
2334

2335
int git_remote_upload(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2336 2337
{
	size_t i;
2338 2339
	int error;
	git_push *push;
2340
	git_refspec *spec;
2341
	const git_remote_callbacks *cbs = NULL;
2342
	const git_strarray *custom_headers = NULL;
2343
	const git_proxy_options *proxy = NULL;
2344

2345
	assert(remote);
2346

2347
	if (opts) {
2348
		cbs = &opts->callbacks;
2349
		custom_headers = &opts->custom_headers;
2350
		proxy = &opts->proxy_opts;
2351
	}
2352

2353
	if (!git_remote_connected(remote) &&
2354
	    (error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, proxy, custom_headers)) < 0)
2355 2356
		goto cleanup;

2357
	free_refspecs(&remote->active_refspecs);
Leo Yang committed
2358
	if ((error = dwim_refspecs(&remote->active_refspecs, &remote->refspecs, &remote->refs)) < 0)
2359 2360
		goto cleanup;

2361 2362 2363 2364 2365 2366
	if (remote->push) {
		git_push_free(remote->push);
		remote->push = NULL;
	}

	if ((error = git_push_new(&remote->push, remote)) < 0)
2367 2368
		return error;

2369
	push = remote->push;
2370 2371 2372 2373

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

2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385
	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;
		}
2386 2387
	}

2388
	if ((error = git_push_finish(push, cbs)) < 0)
2389 2390
		goto cleanup;

2391
	if (cbs && cbs->push_update_reference &&
2392
	    (error = git_push_status_foreach(push, cbs->push_update_reference, cbs->payload)) < 0)
2393 2394 2395
		goto cleanup;

cleanup:
2396 2397 2398
	return error;
}

2399
int git_remote_push(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2400 2401
{
	int error;
2402
	const git_remote_callbacks *cbs = NULL;
2403
	const git_strarray *custom_headers = NULL;
2404
	const git_proxy_options *proxy = NULL;
2405 2406 2407 2408

	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
2409
		custom_headers = &opts->custom_headers;
2410 2411
		GITERR_CHECK_VERSION(&opts->proxy_opts, GIT_PROXY_OPTIONS_VERSION, "git_proxy_options");
		proxy = &opts->proxy_opts;
2412
	}
2413

2414
	assert(remote);
2415

2416
	if ((error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, proxy, custom_headers)) < 0)
2417 2418 2419 2420 2421
		return error;

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

2422
	error = git_remote_update_tips(remote, cbs, 0, 0, NULL);
2423

2424 2425 2426
	git_remote_disconnect(remote);
	return error;
}
2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455

#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;
	}

2456 2457
	if (git_config_iterator_glob_new(&iter, config, regexp) < 0)
		return NULL;
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 2485 2486 2487 2488 2489 2490 2491

	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;
}