remote.c 58.6 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 = NULL;
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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__weakptr(&config, repo)) < 0)
		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 (git_vector_init(&remote->refs, 32, NULL) < 0 ||
		canonicalize_url(&canonical_url, url) < 0)
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		goto on_error;
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	remote->url = apply_insteadof(repo->_config, canonical_url.ptr, GIT_DIRECTION_FETCH);
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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_config_set_string(config, 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 = git_repository_config_snapshot(&config, repo)) < 0)
			goto on_error;

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		if ((error = lookup_remote_prune_config(remote, config, 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);
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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,
		"Remote '%s' already exists.", name);

	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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static int update_config_refspec(const git_remote *remote, git_config *config, int direction)
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{
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	git_buf name = GIT_BUF_INIT;
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	unsigned int push;
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	const char *dir;
	size_t i;
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	int error = 0;
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	const char *cname;
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	push = direction == GIT_DIRECTION_PUSH;
	dir = push ? "push" : "fetch";
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	if (git_buf_printf(&name, "remote.%s.%s", remote->name, dir) < 0)
		return -1;
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	cname = git_buf_cstr(&name);
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	/* Clear out the existing config */
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	while (!error)
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		error = git_config_delete_multivar(config, cname, ".*");
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	if (error != GIT_ENOTFOUND)
		return error;

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	for (i = 0; i < remote->refspecs.length; i++) {
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		git_refspec *spec = git_vector_get(&remote->refspecs, i);

		if (spec->push != push)
			continue;

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		// "$^" is a unmatcheable regexp: it will not match anything at all, so
		// all values will be considered new and we will not replace any
		// present value.
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		if ((error = git_config_set_multivar(
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				config, cname, "$^", spec->string)) < 0) {
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			goto cleanup;
		}
	}

	giterr_clear();
	error = 0;
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cleanup:
	git_buf_free(&name);

	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);

Ben Straub committed
670
	if (direction == GIT_DIRECTION_FETCH) {
671 672 673
		return remote->url;
	}

Ben Straub committed
674
	if (direction == GIT_DIRECTION_PUSH) {
675 676 677 678 679 680
		return remote->pushurl ? remote->pushurl : remote->url;
	}

	return NULL;
}

681 682 683 684 685 686 687 688 689 690
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);
}

int git_remote_connect(git_remote *remote, git_direction direction, const git_remote_callbacks *callbacks)
691 692
{
	git_transport *t;
693
	const char *url;
694
	int flags = GIT_TRANSPORTFLAGS_NONE;
695
	int error;
696
	void *payload = NULL;
697 698
	git_cred_acquire_cb credentials = NULL;
	git_transport_cb transport = NULL;
699

700 701
	assert(remote);

702 703 704
	if (callbacks) {
		GITERR_CHECK_VERSION(callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		credentials = callbacks->credentials;
705
		transport   = callbacks->transport;
706 707 708
		payload     = callbacks->payload;
	}

709 710
	t = remote->transport;

711
	url = git_remote__urlfordirection(remote, direction);
712
	if (url == NULL) {
713 714
		giterr_set(GITERR_INVALID,
			"Malformed remote '%s' - missing URL", remote->name);
715
		return -1;
716
	}
717

718 719
	/* If we don't have a transport object yet, and the caller specified a
	 * custom transport factory, use that */
720 721
	if (!t && transport &&
		(error = transport(&t, remote, payload)) < 0)
722 723 724 725
		return error;

	/* If we still don't have a transport, then use the global
	 * transport registrations which map URI schemes to transport factories */
726 727
	if (!t && (error = git_transport_new(&t, remote, url)) < 0)
		return error;
728

729 730
	if ((error = set_transport_callbacks(t, callbacks)) < 0 ||
	    (error = t->connect(t, url, credentials, payload, direction, flags)) != 0)
731
		goto on_error;
732 733 734

	remote->transport = t;

735
	return 0;
736

737 738
on_error:
	t->free(t);
739 740 741 742

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

743
	return error;
744 745
}

746
int git_remote_ls(const git_remote_head ***out, size_t *size, git_remote *remote)
747
{
748 749
	assert(remote);

750
	if (!remote->transport) {
751
		giterr_set(GITERR_NET, "this remote has never connected");
752 753 754
		return -1;
	}

755
	return remote->transport->ls(out, size, remote->transport);
756 757
}

758 759 760
int git_remote__get_http_proxy(git_remote *remote, bool use_ssl, char **proxy_url)
{
	git_config *cfg;
761
	git_config_entry *ce = NULL;
762
	git_buf val = GIT_BUF_INIT;
763
	int error;
764 765 766

	assert(remote);

767
	if (!proxy_url || !remote->repo)
768 769 770 771
		return -1;

	*proxy_url = NULL;

772 773
	if ((error = git_repository_config__weakptr(&cfg, remote->repo)) < 0)
		return error;
774 775 776 777 778

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

	/* remote.<name>.proxy config setting */
779
	if (remote->name && remote->name[0]) {
780 781
		git_buf buf = GIT_BUF_INIT;

782 783
		if ((error = git_buf_printf(&buf, "remote.%s.proxy", remote->name)) < 0)
			return error;
784

785 786
		error = git_config__lookup_entry(&ce, cfg, git_buf_cstr(&buf), false);
		git_buf_free(&buf);
787

788
		if (error < 0)
789
			return error;
790

791
		if (ce && ce->value) {
792
			*proxy_url = git__strdup(ce->value);
793 794
			goto found;
		}
795 796 797
	}

	/* http.proxy config setting */
798
	if ((error = git_config__lookup_entry(&ce, cfg, "http.proxy", false)) < 0)
799
		return error;
800

801
	if (ce && ce->value) {
802
		*proxy_url = git__strdup(ce->value);
803 804
		goto found;
	}
805 806

	/* HTTP_PROXY / HTTPS_PROXY environment variables */
807
	error = git__getenv(&val, use_ssl ? "HTTPS_PROXY" : "HTTP_PROXY");
808

809 810 811 812 813 814 815
	if (error < 0) {
		if (error == GIT_ENOTFOUND) {
			giterr_clear();
			error = 0;
		}

		return error;
816
	}
817 818 819 820 821

	*proxy_url = git_buf_detach(&val);

found:
	GITERR_CHECK_ALLOC(*proxy_url);
822
	git_config_entry_free(ce);
823 824 825 826

	return 0;
}

827 828
/* DWIM `refspecs` based on `refs` and append the output to `out` */
static int dwim_refspecs(git_vector *out, git_vector *refspecs, git_vector *refs)
829
{
830
	size_t i;
831 832 833
	git_refspec *spec;

	git_vector_foreach(refspecs, i, spec) {
834 835 836
		if (git_refspec__dwim_one(out, spec, refs) < 0)
			return -1;
	}
837

838 839
	return 0;
}
840

841 842 843 844
static void free_refspecs(git_vector *vec)
{
	size_t i;
	git_refspec *spec;
845

846 847 848
	git_vector_foreach(vec, i, spec) {
		git_refspec__free(spec);
		git__free(spec);
849 850
	}

851
	git_vector_clear(vec);
852 853 854 855 856 857 858 859 860 861
}

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);
}

862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880
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;
}

881
int git_remote_download(git_remote *remote, const git_strarray *refspecs, const git_fetch_options *opts)
882
{
883
	int error = -1;
884
	size_t i;
885
	git_vector *to_active, specs = GIT_VECTOR_INIT, refs = GIT_VECTOR_INIT;
886
	const git_remote_callbacks *cbs = NULL;
887

888
	assert(remote);
889

890 891 892 893 894 895 896 897 898
	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
	}

	if (!git_remote_connected(remote) &&
	    (error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs)) < 0)
		goto on_error;

899
	if (ls_to_vector(&refs, remote) < 0)
900 901
		return -1;

902 903 904
	if ((git_vector_init(&specs, 0, NULL)) < 0)
		goto on_error;

905
	remote->passed_refspecs = 0;
906
	if (!refspecs || !refspecs->count) {
907 908 909 910 911 912 913 914
		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;
915
		remote->passed_refspecs = 1;
916 917
	}

918 919 920
	free_refspecs(&remote->passive_refspecs);
	if ((error = dwim_refspecs(&remote->passive_refspecs, &remote->refspecs, &refs)) < 0)
		goto on_error;
921

922
	free_refspecs(&remote->active_refspecs);
923
	error = dwim_refspecs(&remote->active_refspecs, to_active, &refs);
924

925
	git_vector_free(&refs);
926 927
	free_refspecs(&specs);
	git_vector_free(&specs);
928 929

	if (error < 0)
930
		return error;
931

932 933 934 935 936
	if (remote->push) {
		git_push_free(remote->push);
		remote->push = NULL;
	}

937
	if ((error = git_fetch_negotiate(remote, opts)) < 0)
938
		return error;
939

940
	return git_fetch_download_pack(remote, cbs);
941 942 943 944 945 946

on_error:
	git_vector_free(&refs);
	free_refspecs(&specs);
	git_vector_free(&specs);
	return error;
947 948
}

949 950
int git_remote_fetch(
		git_remote *remote,
951
		const git_strarray *refspecs,
952
		const git_fetch_options *opts,
953
		const char *reflog_message)
954
{
955
	int error, update_fetchhead = 1;
956
	git_remote_autotag_option_t tagopt = remote->download_tags;
957
	bool prune = false;
958
	git_buf reflog_msg_buf = GIT_BUF_INIT;
959 960 961 962 963
	const git_remote_callbacks *cbs = NULL;

	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
964
		update_fetchhead = opts->update_fetchhead;
965
		tagopt = opts->download_tags;
966
	}
967 968

	/* Connect and download everything */
969
	if ((error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs)) != 0)
970 971
		return error;

972
	error = git_remote_download(remote, refspecs, opts);
973 974 975 976

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

977 978 979 980
	/* If the download failed, return the error */
	if (error != 0)
		return error;

981 982 983 984 985 986 987 988
	/* 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);
	}

989
	/* Create "remote/foo" branches for all remote branches */
990
	error = git_remote_update_tips(remote, cbs, update_fetchhead, tagopt, git_buf_cstr(&reflog_msg_buf));
991
	git_buf_free(&reflog_msg_buf);
992 993 994
	if (error < 0)
		return error;

995 996
	if (opts && opts->prune == GIT_FETCH_PRUNE)
		prune = true;
997
	else if (opts && opts->prune == GIT_FETCH_PRUNE_UNSPECIFIED && remote->prune_refs)
998 999 1000 1001 1002 1003 1004
		prune = true;
	else if (opts && opts->prune == GIT_FETCH_NO_PRUNE)
		prune = false;
	else
		prune = remote->prune_refs;

	if (prune)
1005
		error = git_remote_prune(remote, cbs);
1006

1007
	return error;
1008 1009
}

1010 1011 1012 1013 1014 1015 1016 1017
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
1018 1019 1020 1021 1022

	git_vector_foreach(update_heads, i, remote_ref) {
		if (strcmp(remote_ref->name, fetchspec_src) == 0) {
			*out = remote_ref;
			break;
1023 1024 1025 1026 1027 1028
		}
	}

	return 0;
}

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 1058 1059 1060
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;
}

1061
static int remote_head_for_ref(git_remote_head **out, git_remote *remote, git_refspec *spec, git_vector *update_heads, git_reference *ref)
1062 1063 1064
{
	git_reference *resolved_ref = NULL;
	git_buf remote_name = GIT_BUF_INIT;
1065
	git_config *config = NULL;
1066
	const char *ref_name;
1067
	int error = 0, update;
1068

1069
	assert(out && spec && ref);
1070 1071 1072

	*out = NULL;

1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
	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);
	}

1083
	if ((error = ref_to_update(&update, &remote_name, remote, spec, ref_name)) < 0)
1084 1085
		goto cleanup;

1086 1087
	if (update)
		error = remote_head_for_fetchspec_src(out, update_heads, git_buf_cstr(&remote_name));
1088 1089

cleanup:
Carlos Martín Nieto committed
1090
	git_buf_free(&remote_name);
1091
	git_reference_free(resolved_ref);
1092
	git_config_free(config);
1093 1094 1095
	return error;
}

1096
static int git_remote_write_fetchhead(git_remote *remote, git_refspec *spec, git_vector *update_heads)
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
{
	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);

1108 1109 1110 1111
	/* no heads, nothing to do */
	if (update_heads->length == 0)
		return 0;

1112 1113 1114 1115 1116 1117 1118 1119 1120
	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 ||
1121
			(error = remote_head_for_ref(&merge_remote_ref, remote, spec, update_heads, head_ref)) < 0)
1122 1123 1124 1125 1126 1127 1128 1129
				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
1130
	git_vector_foreach(update_heads, i, remote_ref) {
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 1158 1159 1160
		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;
}

1161 1162 1163 1164 1165
/**
 * 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)
1166 1167
{
	git_strarray arr = { 0 };
1168
	size_t i;
1169 1170 1171 1172 1173
	int error;

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

1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200
	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);
}

1201
int git_remote_prune(git_remote *remote, const git_remote_callbacks *callbacks)
1202 1203 1204 1205 1206 1207 1208 1209 1210
{
	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 }};

1211 1212 1213
	if (callbacks)
		GITERR_CHECK_VERSION(callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");

1214 1215 1216
	if ((error = ls_to_vector(&remote_refs, remote)) < 0)
		goto cleanup;

1217
	git_vector_set_cmp(&remote_refs, find_head);
1218

1219 1220
	if ((error = prune_candidates(&candidates, remote)) < 0)
		goto cleanup;
1221

1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233
	/*
	 * 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))
1234 1235
				continue;

1236 1237
			if ((error = git_refspec_rtransform(&buf, spec, refname)) < 0)
				goto cleanup;
1238

1239 1240 1241
			key.name = (char *) git_buf_cstr(&buf);
			error = git_vector_search(&pos, &remote_refs, &key);
			git_buf_free(&buf);
1242

1243 1244
			if (error < 0 && error != GIT_ENOTFOUND)
				goto cleanup;
1245

1246
			if (error == GIT_ENOTFOUND)
1247 1248
				continue;

1249 1250 1251 1252 1253 1254
			/* 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;
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 1287 1288 1289
	/*
	 * 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;

1290 1291
		if (callbacks && callbacks->update_tips)
			error = callbacks->update_tips(refname, &id, &zero_id, callbacks->payload);
1292 1293 1294 1295 1296

		if (error < 0)
			goto cleanup;
	}

1297 1298
cleanup:
	git_vector_free(&remote_refs);
1299
	git_vector_free_deep(&candidates);
1300 1301 1302
	return error;
}

1303 1304
static int update_tips_for_spec(
		git_remote *remote,
1305
		const git_remote_callbacks *callbacks,
1306
		int update_fetchhead,
1307
		git_remote_autotag_option_t tagopt,
1308 1309 1310
		git_refspec *spec,
		git_vector *refs,
		const char *log_message)
1311
{
1312
	int error = 0, autotag;
1313
	unsigned int i = 0;
1314
	git_buf refname = GIT_BUF_INIT;
1315
	git_oid old;
1316
	git_odb *odb;
1317 1318
	git_remote_head *head;
	git_reference *ref;
1319
	git_refspec tagspec;
1320
	git_vector update_heads;
1321

1322 1323
	assert(remote);

1324
	if (git_repository_odb__weakptr(&odb, remote->repo) < 0)
1325 1326
		return -1;

1327
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
1328 1329
		return -1;

1330
	/* Make a copy of the transport's refs */
1331
	if (git_vector_init(&update_heads, 16, NULL) < 0)
1332
		return -1;
1333

1334 1335
	for (; i < refs->length; ++i) {
		head = git_vector_get(refs, i);
1336
		autotag = 0;
1337

1338 1339 1340 1341
		/* Ignore malformed ref names (which also saves us from tag^{} */
		if (!git_reference_is_valid_name(head->name))
			continue;

1342
		if (git_refspec_src_matches(&tagspec, head->name)) {
1343
			if (tagopt != GIT_REMOTE_DOWNLOAD_TAGS_NONE) {
1344

1345
				if (tagopt == GIT_REMOTE_DOWNLOAD_TAGS_AUTO)
1346
					autotag = 1;
1347

1348 1349 1350 1351
				git_buf_clear(&refname);
				if (git_buf_puts(&refname, head->name) < 0)
					goto on_error;
			} else {
1352
				continue;
1353
			}
1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367
		} else if (git_refspec_src_matches(spec, head->name)) {
			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
		} else {
			continue;
		}

1372
		/* In autotag mode, only create tags for objects already in db */
1373 1374
		if (autotag && !git_odb_exists(odb, &head->oid))
			continue;
1375

1376
		if (!autotag && git_vector_insert(&update_heads, head) < 0)
1377 1378
			goto on_error;

1379
		error = git_reference_name_to_id(&old, remote->repo, refname.ptr);
1380
		if (error < 0 && error != GIT_ENOTFOUND)
1381 1382
			goto on_error;

1383
		if (error == GIT_ENOTFOUND) {
1384 1385
			memset(&old, 0, GIT_OID_RAWSZ);

1386 1387 1388 1389
			if (autotag && git_vector_insert(&update_heads, head) < 0)
				goto on_error;
		}

1390
		if (!git_oid__cmp(&old, &head->oid))
1391
			continue;
1392

1393
		/* In autotag mode, don't overwrite any locally-existing tags */
1394
		error = git_reference_create(&ref, remote->repo, refname.ptr, &head->oid, !autotag, 
1395
				log_message);
1396
		if (error < 0 && error != GIT_EEXISTS)
1397
			goto on_error;
1398 1399

		git_reference_free(ref);
1400

1401 1402
		if (callbacks && callbacks->update_tips != NULL) {
			if (callbacks->update_tips(refname.ptr, &old, &head->oid, callbacks->payload) < 0)
1403 1404
				goto on_error;
		}
1405 1406
	}

1407
	if (update_fetchhead &&
1408
	    (error = git_remote_write_fetchhead(remote, spec, &update_heads)) < 0)
1409 1410 1411
		goto on_error;

	git_vector_free(&update_heads);
1412
	git_refspec__free(&tagspec);
1413
	git_buf_free(&refname);
1414 1415 1416
	return 0;

on_error:
1417
	git_vector_free(&update_heads);
1418
	git_refspec__free(&tagspec);
1419 1420
	git_buf_free(&refname);
	return -1;
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 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
/**
 * 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;
}

1481 1482
static int opportunistic_updates(const git_remote *remote, const git_remote_callbacks *callbacks,
				 git_vector *refs, const char *msg)
1483 1484 1485 1486 1487 1488
{
	size_t i, j, k;
	git_refspec *spec;
	git_remote_head *head;
	git_reference *ref;
	git_buf refname = GIT_BUF_INIT;
1489
	int error = 0;
1490 1491 1492 1493

	i = j = k = 0;

	while ((error = next_head(remote, refs, &spec, &head, &i, &j, &k)) == 0) {
1494
		git_oid old = {{ 0 }};
1495 1496 1497 1498 1499 1500 1501 1502
		/*
		 * 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
		 */

1503
		git_buf_clear(&refname);
1504
		if ((error = git_refspec_transform(&refname, spec, head->name)) < 0)
1505
			goto cleanup;
1506

1507 1508 1509 1510 1511 1512
		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;
1513

1514 1515 1516 1517 1518 1519
		/* 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);
1520
		if (error < 0)
1521 1522 1523 1524 1525 1526
			goto cleanup;

		if (callbacks && callbacks->update_tips != NULL) {
			if (callbacks->update_tips(refname.ptr, &old, &head->oid, callbacks->payload) < 0)
				goto cleanup;
		}
1527 1528
	}

1529 1530 1531 1532 1533 1534
	if (error == GIT_ITEROVER)
		error = 0;

cleanup:
	git_buf_free(&refname);
	return error;
1535 1536
}

1537 1538
int git_remote_update_tips(
		git_remote *remote,
1539
		const git_remote_callbacks *callbacks,
1540
		int update_fetchhead,
1541
		git_remote_autotag_option_t download_tags,
1542
		const char *reflog_message)
1543
{
1544
	git_refspec *spec, tagspec;
1545
	git_vector refs = GIT_VECTOR_INIT;
1546
	git_remote_autotag_option_t tagopt;
1547
	int error;
1548 1549
	size_t i;

1550 1551
	/* push has its own logic hidden away in the push object */
	if (remote->push) {
1552
		return git_push_update_tips(remote->push, callbacks);
1553 1554
	}

1555 1556 1557
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
		return -1;

1558 1559

	if ((error = ls_to_vector(&refs, remote)) < 0)
1560 1561
		goto out;

1562
	if (download_tags == GIT_REMOTE_DOWNLOAD_TAGS_UNSPECIFIED)
1563 1564 1565 1566 1567 1568
		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)
1569
			goto out;
1570
	}
1571

1572
	git_vector_foreach(&remote->active_refspecs, i, spec) {
1573 1574 1575
		if (spec->push)
			continue;

1576
		if ((error = update_tips_for_spec(remote, callbacks, update_fetchhead, tagopt, spec, &refs, reflog_message)) < 0)
1577
			goto out;
1578 1579
	}

1580 1581
	/* only try to do opportunisitic updates if the refpec lists differ */
	if (remote->passed_refspecs)
1582
		error = opportunistic_updates(remote, callbacks, &refs, reflog_message);
1583

1584
out:
1585
	git_vector_free(&refs);
1586 1587
	git_refspec__free(&tagspec);
	return error;
1588 1589
}

1590
int git_remote_connected(const git_remote *remote)
1591
{
1592
	assert(remote);
1593 1594 1595 1596 1597

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

	/* Ask the transport if it's connected. */
1598
	return remote->transport->is_connected(remote->transport);
1599 1600
}

1601 1602
void git_remote_stop(git_remote *remote)
{
1603 1604 1605
	assert(remote);

	if (remote->transport && remote->transport->cancel)
1606
		remote->transport->cancel(remote->transport);
1607 1608
}

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

1613 1614
	if (git_remote_connected(remote))
		remote->transport->close(remote->transport);
1615 1616
}

Carlos Martín Nieto committed
1617 1618
void git_remote_free(git_remote *remote)
{
1619 1620 1621
	if (remote == NULL)
		return;

1622 1623 1624 1625 1626 1627 1628 1629 1630
	if (remote->transport != NULL) {
		git_remote_disconnect(remote);

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

	git_vector_free(&remote->refs);

1631
	free_refspecs(&remote->refspecs);
1632 1633
	git_vector_free(&remote->refspecs);

1634 1635 1636
	free_refspecs(&remote->active_refspecs);
	git_vector_free(&remote->active_refspecs);

1637 1638 1639
	free_refspecs(&remote->passive_refspecs);
	git_vector_free(&remote->passive_refspecs);

1640
	git_push_free(remote->push);
1641
	git__free(remote->url);
1642
	git__free(remote->pushurl);
1643 1644
	git__free(remote->name);
	git__free(remote);
Carlos Martín Nieto committed
1645
}
1646

1647
static int remote_list_cb(const git_config_entry *entry, void *payload)
1648
{
1649
	git_vector *list = payload;
1650 1651 1652
	const char *name = entry->name + strlen("remote.");
	size_t namelen = strlen(name);
	char *remote_name;
1653

1654
	/* we know name matches "remote.<stuff>.(push)?url" */
1655

1656 1657 1658 1659
	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" */
1660
	GITERR_CHECK_ALLOC(remote_name);
1661

1662
	return git_vector_insert(list, remote_name);
1663 1664 1665 1666 1667
}

int git_remote_list(git_strarray *remotes_list, git_repository *repo)
{
	int error;
1668
	git_config *cfg;
1669
	git_vector list = GIT_VECTOR_INIT;
1670

1671 1672
	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
		return error;
1673

1674
	if ((error = git_vector_init(&list, 4, git__strcmp_cb)) < 0)
1675
		return error;
1676

1677
	error = git_config_foreach_match(
1678
		cfg, "^remote\\..*\\.(push)?url$", remote_list_cb, &list);
1679

1680
	if (error < 0) {
1681
		git_vector_free_deep(&list);
1682 1683 1684
		return error;
	}

1685
	git_vector_uniq(&list, git__free);
1686

1687 1688
	remotes_list->strings =
		(char **)git_vector_detach(&remotes_list->count, NULL, &list);
1689

1690
	return 0;
1691
}
1692

Ben Straub committed
1693
const git_transfer_progress* git_remote_stats(git_remote *remote)
1694 1695 1696 1697 1698
{
	assert(remote);
	return &remote->stats;
}

1699
git_remote_autotag_option_t git_remote_autotag(const git_remote *remote)
1700 1701 1702 1703
{
	return remote->download_tags;
}

1704
int git_remote_set_autotag(git_repository *repo, const char *remote, git_remote_autotag_option_t value)
1705
{
1706 1707 1708 1709 1710 1711 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
	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:
		giterr_set(GITERR_INVALID, "Invalid value for the tagopt setting");
		error = -1;
	}

	git_buf_free(&var);
	return error;
1740
}
1741

1742 1743 1744 1745 1746
int git_remote_prune_refs(const git_remote *remote)
{
	return remote->prune_refs;
}

1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758
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;

1759 1760 1761
	if (new_name &&
		(git_buf_printf(&new_section_name, "remote.%s", new_name) < 0))
			goto cleanup;
1762 1763 1764 1765

	error = git_config_rename_section(
		repo,
		git_buf_cstr(&old_section_name),
1766
		new_name ? git_buf_cstr(&new_section_name) : NULL);
1767 1768 1769 1770 1771 1772 1773 1774

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

	return error;
}

1775
struct update_data {
1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789
	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;

1790 1791
	return git_config_set_string(
		data->config, entry->name, data->new_remote_name);
1792 1793 1794 1795 1796 1797 1798
}

static int update_branch_remote_config_entry(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1799 1800
	int error;
	struct update_data data = { NULL };
1801

1802 1803
	if ((error = git_repository_config__weakptr(&data.config, repo)) < 0)
		return error;
1804 1805 1806 1807

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

1808
	return git_config_foreach_match(
1809
		data.config, "branch\\..+\\.remote", update_config_entries_cb, &data);
1810 1811 1812
}

static int rename_one_remote_reference(
1813
	git_reference *reference_in,
1814 1815 1816
	const char *old_remote_name,
	const char *new_remote_name)
{
1817
	int error;
1818 1819
	git_reference *ref = NULL, *dummy = NULL;
	git_buf namespace = GIT_BUF_INIT, old_namespace = GIT_BUF_INIT;
1820
	git_buf new_name = GIT_BUF_INIT;
1821
	git_buf log_message = GIT_BUF_INIT;
1822 1823
	size_t pfx_len;
	const char *target;
1824

1825 1826 1827 1828 1829 1830
	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)
1831
		goto cleanup;
1832

1833 1834 1835 1836
	if ((error = git_buf_printf(&log_message,
					"renamed remote %s to %s",
					old_remote_name, new_remote_name)) < 0)
		goto cleanup;
1837

1838
	if ((error = git_reference_rename(&ref, reference_in, git_buf_cstr(&new_name), 1,
1839
					  git_buf_cstr(&log_message))) < 0)
1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858
		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),
1859
						  git_buf_cstr(&log_message));
1860 1861

	git_reference_free(dummy);
1862 1863

cleanup:
1864 1865 1866 1867
	git_reference_free(reference_in);
	git_reference_free(ref);
	git_buf_free(&namespace);
	git_buf_free(&old_namespace);
1868
	git_buf_free(&new_name);
1869
	git_buf_free(&log_message);
1870 1871 1872 1873 1874 1875 1876 1877
	return error;
}

static int rename_remote_references(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1878
	int error;
1879
	git_buf buf = GIT_BUF_INIT;
Vicent Marti committed
1880
	git_reference *ref;
1881
	git_reference_iterator *iter;
1882

1883
	if ((error = git_buf_printf(&buf, GIT_REFS_REMOTES_DIR "%s/*", old_name)) < 0)
1884
		return error;
1885

1886 1887
	error = git_reference_iterator_glob_new(&iter, repo, git_buf_cstr(&buf));
	git_buf_free(&buf);
1888

1889 1890 1891 1892
	if (error < 0)
		return error;

	while ((error = git_reference_next(&ref, iter)) == 0) {
1893 1894
		if ((error = rename_one_remote_reference(ref, old_name, new_name)) < 0)
			break;
1895 1896 1897
	}

	git_reference_iterator_free(iter);
1898

1899
	return (error == GIT_ITEROVER) ? 0 : error;
1900 1901
}

1902
static int rename_fetch_refspecs(git_vector *problems, git_remote *remote, const char *new_name)
1903 1904
{
	git_config *config;
1905
	git_buf base = GIT_BUF_INIT, var = GIT_BUF_INIT, val = GIT_BUF_INIT;
1906
	const git_refspec *spec;
1907
	size_t i;
1908
	int error = 0;
1909

1910
	if ((error = git_repository_config__weakptr(&config, remote->repo)) < 0)
1911 1912
		return error;

1913 1914 1915
	if ((error = git_vector_init(problems, 1, NULL)) < 0)
		return error;

1916 1917 1918
	if ((error = git_buf_printf(
			&base, "+refs/heads/*:refs/remotes/%s/*", remote->name)) < 0)
		return error;
1919

1920
	git_vector_foreach(&remote->refspecs, i, spec) {
1921 1922
		if (spec->push)
			continue;
1923

1924
		/* Does the dst part of the refspec follow the expected format? */
1925
		if (strcmp(git_buf_cstr(&base), spec->string)) {
1926
			char *dup;
1927

1928 1929 1930 1931
			dup = git__strdup(spec->string);
			GITERR_CHECK_ALLOC(dup);

			if ((error = git_vector_insert(problems, dup)) < 0)
1932
				break;
1933

1934 1935
			continue;
		}
1936

1937
		/* If we do want to move it to the new section */
1938

1939 1940
		git_buf_clear(&val);
		git_buf_clear(&var);
1941

1942 1943 1944 1945 1946
		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;
1947
			break;
1948
		}
1949

1950 1951
		if ((error = git_config_set_string(
				config, git_buf_cstr(&var), git_buf_cstr(&val))) < 0)
1952
			break;
1953
	}
1954

1955 1956 1957
	git_buf_free(&base);
	git_buf_free(&var);
	git_buf_free(&val);
1958 1959 1960 1961 1962 1963 1964 1965 1966

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

		git_vector_free(problems);
	}

1967 1968 1969
	return error;
}

1970
int git_remote_rename(git_strarray *out, git_repository *repo, const char *name, const char *new_name)
1971 1972
{
	int error;
1973
	git_vector problem_refspecs = GIT_VECTOR_INIT;
1974
	git_remote *remote = NULL;
1975

1976
	assert(out && repo && name && new_name);
1977

1978
	if ((error = git_remote_lookup(&remote, repo, name)) < 0)
1979
		return error;
1980

1981
	if ((error = ensure_remote_name_is_valid(new_name)) < 0)
1982
		goto cleanup;
1983

1984 1985
	if ((error = ensure_remote_doesnot_exist(repo, new_name)) < 0)
		goto cleanup;
1986

1987 1988
	if ((error = rename_remote_config_section(repo, name, new_name)) < 0)
		goto cleanup;
1989

1990 1991
	if ((error = update_branch_remote_config_entry(repo, name, new_name)) < 0)
		goto cleanup;
1992

1993 1994
	if ((error = rename_remote_references(repo, name, new_name)) < 0)
		goto cleanup;
1995

1996
	if ((error = rename_fetch_refspecs(&problem_refspecs, remote, new_name)) < 0)
1997
		goto cleanup;
1998

1999 2000 2001
	out->count = problem_refspecs.length;
	out->strings = (char **) problem_refspecs.contents;

2002 2003 2004
cleanup:
	if (error < 0)
		git_vector_free(&problem_refspecs);
2005

2006 2007
	git_remote_free(remote);
	return error;
2008
}
2009

2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028
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;
}
2029 2030 2031 2032 2033 2034

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

2035
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050
		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;

2051
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2052 2053 2054 2055 2056 2057 2058 2059 2060 2061
		if (spec->push)
			continue;

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

	return NULL;
}

2062
int git_remote_add_fetch(git_repository *repo, const char *remote, const char *refspec)
2063
{
2064
	return write_add_refspec(repo, remote, refspec, true);
2065 2066
}

2067
int git_remote_add_push(git_repository *repo, const char *remote, const char *refspec)
2068
{
2069
	return write_add_refspec(repo, remote, refspec, false);
2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096
}

static int set_refspecs(git_remote *remote, git_strarray *array, int push)
{
	git_vector *vec = &remote->refspecs;
	git_refspec *spec;
	size_t i;

	/* Start by removing any refspecs of the same type */
	for (i = 0; i < vec->length; i++) {
		spec = git_vector_get(vec, i);
		if (spec->push != push)
			continue;

		git_refspec__free(spec);
		git__free(spec);
		git_vector_remove(vec, i);
		i--;
	}

	/* And now we add the new ones */

	for (i = 0; i < array->count; i++) {
		if (add_refspec(remote, array->strings[i], !push) < 0)
			return -1;
	}

2097
	return 0;
2098 2099
}

2100
static int copy_refspecs(git_strarray *array, const git_remote *remote, unsigned int push)
2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113
{
	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;

2114
		if ((dup = git__strdup(spec->string)) == NULL)
2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128
			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:
2129
	git_vector_free_deep(&refspecs);
2130 2131 2132 2133

	return -1;
}

2134
int git_remote_get_fetch_refspecs(git_strarray *array, const git_remote *remote)
2135 2136 2137 2138
{
	return copy_refspecs(array, remote, false);
}

2139
int git_remote_get_push_refspecs(git_strarray *array, const git_remote *remote)
2140 2141 2142
{
	return copy_refspecs(array, remote, true);
}
2143

2144
size_t git_remote_refspec_count(const git_remote *remote)
2145 2146 2147 2148
{
	return remote->refspecs.length;
}

2149
const git_refspec *git_remote_get_refspec(const git_remote *remote, size_t n)
2150 2151 2152
{
	return git_vector_get(&remote->refspecs, n);
}
2153

2154
int git_remote_init_callbacks(git_remote_callbacks *opts, unsigned int version)
2155
{
2156 2157 2158
	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
		opts, version, git_remote_callbacks, GIT_REMOTE_CALLBACKS_INIT);
	return 0;
2159
}
2160

2161 2162
/* asserts a branch.<foo>.remote format */
static const char *name_offset(size_t *len_out, const char *name)
2163
{
2164 2165
	size_t prefix_len;
	const char *dot;
2166

2167 2168
	prefix_len = strlen("remote.");
	dot = strchr(name + prefix_len, '.');
2169

2170
	assert(dot);
2171

2172 2173
	*len_out = dot - name - prefix_len;
	return name + prefix_len;
2174 2175 2176 2177 2178 2179 2180 2181
}

static int remove_branch_config_related_entries(
	git_repository *repo,
	const char *remote_name)
{
	int error;
	git_config *config;
2182 2183 2184
	git_config_entry *entry;
	git_config_iterator *iter;
	git_buf buf = GIT_BUF_INIT;
2185 2186 2187 2188

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

2189
	if ((error = git_config_iterator_glob_new(&iter, config, "branch\\..+\\.remote")) < 0)
2190 2191
		return error;

2192 2193 2194 2195
	/* 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;
2196

2197 2198
		if (strcmp(remote_name, entry->value))
			continue;
2199

2200
		branch = name_offset(&branch_len, entry->name);
2201

2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214
		git_buf_clear(&buf);
		if (git_buf_printf(&buf, "branch.%.*s.merge", (int)branch_len, branch) < 0)
			break;

		if ((error = git_config_delete_entry(config, git_buf_cstr(&buf))) < 0)
			break;

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

		if ((error = git_config_delete_entry(config, git_buf_cstr(&buf))) < 0)
			break;
2215 2216
	}

2217 2218 2219 2220 2221
	if (error == GIT_ITEROVER)
		error = 0;

	git_buf_free(&buf);
	git_config_iterator_free(iter);
2222 2223 2224
	return error;
}

2225
static int remove_refs(git_repository *repo, const git_refspec *spec)
2226
{
2227 2228
	git_reference_iterator *iter = NULL;
	git_vector refs;
2229
	const char *name;
2230
	char *dup;
2231
	int error;
2232
	size_t i;
2233

2234
	if ((error = git_vector_init(&refs, 8, NULL)) < 0)
2235 2236
		return error;

2237 2238 2239
	if ((error = git_reference_iterator_new(&iter, repo)) < 0)
		goto cleanup;

2240
	while ((error = git_reference_next_name(&name, iter)) == 0) {
2241 2242 2243 2244 2245 2246 2247 2248
		if (!git_refspec_dst_matches(spec, name))
			continue;

		dup = git__strdup(name);
		if (!dup) {
			error = -1;
			goto cleanup;
		}
2249

2250 2251 2252
		if ((error = git_vector_insert(&refs, dup)) < 0)
			goto cleanup;
	}
2253 2254
	if (error == GIT_ITEROVER)
		error = 0;
2255 2256 2257 2258 2259 2260 2261
	if (error < 0)
		goto cleanup;

	git_vector_foreach(&refs, i, name) {
		if ((error = git_reference_remove(repo, name)) < 0)
			break;
	}
2262

2263 2264 2265 2266 2267 2268
cleanup:
	git_reference_iterator_free(iter);
	git_vector_foreach(&refs, i, dup) {
		git__free(dup);
	}
	git_vector_free(&refs);
2269 2270 2271 2272 2273 2274 2275 2276 2277 2278
	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 */
2279
	if ((error = git_remote_lookup(&remote, repo, remote_name)) < 0)
2280 2281 2282 2283 2284 2285 2286 2287 2288 2289
		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;

2290
		if ((error = remove_refs(repo, refspec)) < 0)
2291 2292 2293 2294 2295 2296 2297
			break;
	}

	git_remote_free(remote);
	return error;
}

2298
int git_remote_delete(git_repository *repo, const char *name)
2299 2300 2301
{
	int error;

2302
	assert(repo && name);
2303

2304 2305 2306
	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)
2307 2308
		return error;

2309 2310
	return 0;
}
2311 2312 2313 2314 2315 2316 2317 2318 2319

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;

2320 2321
	assert(out);

2322 2323 2324 2325 2326 2327
	if ((error = git_remote_ls(&heads, &heads_len, remote)) < 0)
		return error;

	if (heads_len == 0)
		return GIT_ENOTFOUND;

2328 2329 2330
	if (strcmp(heads[0]->name, GIT_HEAD_FILE))
		return GIT_ENOTFOUND;

2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346
	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;

2347 2348 2349
		if (git__prefixcmp(heads[i]->name, GIT_REFS_HEADS_DIR))
			continue;

2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365
		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);
}
2366

2367
int git_remote_upload(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2368 2369
{
	size_t i;
2370 2371
	int error;
	git_push *push;
2372
	git_refspec *spec;
2373
	const git_remote_callbacks *cbs = NULL;
2374

2375
	assert(remote);
2376

2377 2378 2379
	if (opts)
		cbs = &opts->callbacks;

2380
	if (!git_remote_connected(remote) &&
2381
	    (error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs)) < 0)
2382 2383
		goto cleanup;

2384
	free_refspecs(&remote->active_refspecs);
Leo Yang committed
2385
	if ((error = dwim_refspecs(&remote->active_refspecs, &remote->refspecs, &remote->refs)) < 0)
2386 2387
		goto cleanup;

2388 2389 2390 2391 2392 2393
	if (remote->push) {
		git_push_free(remote->push);
		remote->push = NULL;
	}

	if ((error = git_push_new(&remote->push, remote)) < 0)
2394 2395
		return error;

2396
	push = remote->push;
2397 2398 2399 2400

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

2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412
	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;
		}
2413 2414
	}

2415
	if ((error = git_push_finish(push, cbs)) < 0)
2416 2417
		goto cleanup;

2418
	if (cbs && cbs->push_update_reference &&
2419
	    (error = git_push_status_foreach(push, cbs->push_update_reference, cbs->payload)) < 0)
2420 2421 2422
		goto cleanup;

cleanup:
2423 2424 2425
	return error;
}

2426
int git_remote_push(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2427 2428
{
	int error;
2429 2430 2431 2432 2433 2434
	const git_remote_callbacks *cbs = NULL;

	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
	}
2435 2436 2437

	assert(remote && refspecs);

2438
	if ((error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs)) < 0)
2439 2440 2441 2442 2443
		return error;

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

2444
	error = git_remote_update_tips(remote, cbs, 0, 0, NULL);
2445

2446 2447 2448
	git_remote_disconnect(remote);
	return error;
}
2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477

#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;
	}

2478 2479
	if (git_config_iterator_glob_new(&iter, config, regexp) < 0)
		return NULL;
2480 2481 2482 2483 2484 2485 2486 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

	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;
}