remote.c 44.7 KB
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/*
Edward Thomson committed
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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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static int dwim_refspecs(git_vector *out, git_vector *refspecs, git_vector *refs);

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static int add_refspec(git_remote *remote, 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(&remote->refspecs, spec) < 0) {
		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 download_tags_value(git_remote *remote, git_config *cfg)
{
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	const git_config_entry *ce;
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	git_buf buf = GIT_BUF_INIT;
	int error;

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	/* The 0 value is the default (auto), let's see if we need to change it */
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	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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	return error;
}

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static int ensure_remote_name_is_valid(const char *name)
{
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	int error = 0;
72

73
	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 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 = 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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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_buf fetchbuf = GIT_BUF_INIT;
	int error = -1;
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	/* name is optional */
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	assert(out && repo && url);
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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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	remote->update_fetchhead = 1;
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	if (get_check_cert(&remote->check_cert, repo) < 0)
		goto on_error;

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	if (git_vector_init(&remote->refs, 32, NULL) < 0)
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		goto on_error;
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	remote->url = git__strdup(url);
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	GITERR_CHECK_ALLOC(remote->url);
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	if (name != NULL) {
		remote->name = git__strdup(name);
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		GITERR_CHECK_ALLOC(remote->name);
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	}

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

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

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	*out = remote;
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	git_buf_free(&fetchbuf);
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	return 0;
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on_error:
	git_remote_free(remote);
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	git_buf_free(&fetchbuf);
	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;

	error = git_remote_load(&remote, repo, name);

	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;
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	git_remote *remote = NULL;
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	int error;

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

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	if ((error = ensure_remote_doesnot_exist(repo, name)) < 0)
		return error;

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

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	if (create_internal(&remote, repo, name, url, git_buf_cstr(&buf)) < 0)
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		goto on_error;

	git_buf_free(&buf);

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	if (git_remote_save(remote) < 0)
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		goto on_error;

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	*out = remote;

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	return 0;

on_error:
	git_buf_free(&buf);
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	git_remote_free(remote);
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	return -1;
}

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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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	if (git_remote_save(remote) < 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, const char *fetch)
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{
	int error;
	git_remote *remote;

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	if ((error = create_internal(&remote, repo, NULL, url, fetch)) < 0)
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		return error;

	*out = remote;
	return 0;
}

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int git_remote_dup(git_remote **dest, git_remote *source)
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{
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	int error = 0;
	git_strarray refspecs = { 0 };
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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);
		GITERR_CHECK_ALLOC(remote->url);		
	}

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

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	remote->transport_cb = source->transport_cb;
	remote->transport_cb_payload = source->transport_cb_payload;
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	remote->repo = source->repo;
	remote->download_tags = source->download_tags;
	remote->check_cert = source->check_cert;
	remote->update_fetchhead = source->update_fetchhead;

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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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	if ((error = git_remote_get_fetch_refspecs(&refspecs, source)) < 0 ||
	    (error = git_remote_set_fetch_refspecs(remote, &refspecs)) < 0)
		goto cleanup;

	git_strarray_free(&refspecs);

	if ((error = git_remote_get_push_refspecs(&refspecs, source)) < 0 ||
	    (error = git_remote_set_push_refspecs(remote, &refspecs)) < 0)
		goto cleanup;

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	*dest = remote;

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cleanup:

	git_strarray_free(&refspecs);

	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_load(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__malloc(sizeof(git_remote));
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	GITERR_CHECK_ALLOC(remote);
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	memset(remote, 0x0, sizeof(git_remote));
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	remote->update_fetchhead = 1;
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	remote->name = git__strdup(name);
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	GITERR_CHECK_ALLOC(remote->name);
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	if ((error = get_check_cert(&remote->check_cert, repo)) < 0)
		goto cleanup;

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

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	*out = remote;

cleanup:
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	git_config_free(config);
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	git_buf_free(&buf);
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	if (error < 0)
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		git_remote_free(remote);

	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;
Linquize committed
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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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int git_remote_save(const git_remote *remote)
{
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	int error;
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	git_config *cfg;
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	const char *tagopt = NULL;
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	git_buf buf = GIT_BUF_INIT;
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	const git_config_entry *existing;
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	assert(remote);

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	if (!remote->name) {
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		giterr_set(GITERR_INVALID, "Can't save an anonymous remote.");
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		return GIT_EINVALIDSPEC;
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	}

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	if ((error = ensure_remote_name_is_valid(remote->name)) < 0)
		return error;
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	if ((error = git_repository_config__weakptr(&cfg, remote->repo)) < 0)
		return error;
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	if ((error = git_buf_printf(&buf, "remote.%s.url", remote->name)) < 0)
		return error;
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	/* after this point, buffer is allocated so end with cleanup */

	if ((error = git_config_set_string(
			cfg, git_buf_cstr(&buf), remote->url)) < 0)
		goto cleanup;
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	git_buf_clear(&buf);
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	if ((error = git_buf_printf(&buf, "remote.%s.pushurl", remote->name)) < 0)
		goto cleanup;
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	if ((error = git_config__update_entry(
			cfg, git_buf_cstr(&buf), remote->pushurl, true, false)) < 0)
		goto cleanup;
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	if ((error = update_config_refspec(remote, cfg, GIT_DIRECTION_FETCH)) < 0)
		goto cleanup;
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	if ((error = update_config_refspec(remote, cfg, GIT_DIRECTION_PUSH)) < 0)
		goto cleanup;
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	/*
	 * What action to take depends on the old and new values. This
	 * is describes by the table below. tagopt means whether the
	 * is already a value set in the config
	 *
	 *            AUTO     ALL or NONE
	 *         +-----------------------+
	 *  tagopt | remove  |     set     |
	 *         +---------+-------------|
	 * !tagopt | nothing |     set     |
	 *         +---------+-------------+
	 */

	git_buf_clear(&buf);
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	if ((error = git_buf_printf(&buf, "remote.%s.tagopt", remote->name)) < 0)
		goto cleanup;
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	if ((error = git_config__lookup_entry(
			&existing, cfg, git_buf_cstr(&buf), false)) < 0)
		goto cleanup;
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	if (remote->download_tags == GIT_REMOTE_DOWNLOAD_TAGS_ALL)
		tagopt = "--tags";
	else if (remote->download_tags == GIT_REMOTE_DOWNLOAD_TAGS_NONE)
		tagopt = "--no-tags";
	else if (existing != NULL)
		tagopt = NULL;
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	error = git_config__update_entry(
		cfg, git_buf_cstr(&buf), tagopt, true, false);
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cleanup:
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	git_buf_free(&buf);
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	return error;
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}

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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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int git_remote_set_url(git_remote *remote, const char* url)
{
	assert(remote);
	assert(url);

	git__free(remote->url);
	remote->url = git__strdup(url);
	GITERR_CHECK_ALLOC(remote->url);

	return 0;
}

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

int git_remote_set_pushurl(git_remote *remote, const char* url)
{
	assert(remote);

	git__free(remote->pushurl);
	if (url) {
		remote->pushurl = git__strdup(url);
		GITERR_CHECK_ALLOC(remote->pushurl);
	} else {
		remote->pushurl = NULL;
	}
	return 0;
}

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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 git_remote_connect(git_remote *remote, git_direction direction)
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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;
652

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	assert(remote);

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	t = remote->transport;

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	url = git_remote__urlfordirection(remote, direction);
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	if (url == NULL) {
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		giterr_set(GITERR_INVALID,
			"Malformed remote '%s' - missing URL", remote->name);
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		return -1;
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	}
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	/* If we don't have a transport object yet, and the caller specified a
	 * custom transport factory, use that */
	if (!t && remote->transport_cb &&
		(error = remote->transport_cb(&t, remote, remote->transport_cb_payload)) < 0)
		return error;

	/* If we still don't have a transport, then use the global
	 * transport registrations which map URI schemes to transport factories */
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	if (!t && (error = git_transport_new(&t, remote, url)) < 0)
		return error;
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675
	if (t->set_callbacks &&
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		(error = t->set_callbacks(t, remote->callbacks.sideband_progress, NULL, remote->callbacks.payload)) < 0)
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		goto on_error;
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	if (!remote->check_cert)
		flags |= GIT_TRANSPORTFLAGS_NO_CHECK_CERT;
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682
	if ((error = t->connect(t, url, remote->callbacks.credentials, remote->callbacks.payload, direction, flags)) != 0)
683
		goto on_error;
684 685 686

	remote->transport = t;

687
	return 0;
688

689 690
on_error:
	t->free(t);
691 692 693 694

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

695
	return error;
696 697
}

698
int git_remote_ls(const git_remote_head ***out, size_t *size, git_remote *remote)
699
{
700 701
	assert(remote);

702
	return remote->transport->ls(out, size, remote->transport);
703 704
}

705 706 707
int git_remote__get_http_proxy(git_remote *remote, bool use_ssl, char **proxy_url)
{
	git_config *cfg;
708 709
	const git_config_entry *ce;
	const char *val = NULL;
710
	int error;
711 712 713

	assert(remote);

714
	if (!proxy_url || !remote->repo)
715 716 717 718
		return -1;

	*proxy_url = NULL;

719 720
	if ((error = git_repository_config__weakptr(&cfg, remote->repo)) < 0)
		return error;
721 722 723 724 725

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

	/* remote.<name>.proxy config setting */
726
	if (remote->name && remote->name[0]) {
727 728
		git_buf buf = GIT_BUF_INIT;

729 730
		if ((error = git_buf_printf(&buf, "remote.%s.proxy", remote->name)) < 0)
			return error;
731

732 733
		error = git_config__lookup_entry(&ce, cfg, git_buf_cstr(&buf), false);
		git_buf_free(&buf);
734

735
		if (error < 0)
736
			return error;
737

738 739 740 741
		if (ce && ce->value) {
			val = ce->value;
			goto found;
		}
742 743 744
	}

	/* http.proxy config setting */
745
	if ((error = git_config__lookup_entry(&ce, cfg, "http.proxy", false)) < 0)
746
		return error;
747 748 749 750
	if (ce && ce->value) {
		val = ce->value;
		goto found;
	}
751 752 753 754

	/* HTTP_PROXY / HTTPS_PROXY environment variables */
	val = use_ssl ? getenv("HTTPS_PROXY") : getenv("HTTP_PROXY");

755 756
found:
	if (val && val[0]) {
757 758 759 760 761 762 763
		*proxy_url = git__strdup(val);
		GITERR_CHECK_ALLOC(*proxy_url);
	}

	return 0;
}

764 765
/* DWIM `refspecs` based on `refs` and append the output to `out` */
static int dwim_refspecs(git_vector *out, git_vector *refspecs, git_vector *refs)
766
{
767
	size_t i;
768 769 770
	git_refspec *spec;

	git_vector_foreach(refspecs, i, spec) {
771 772 773
		if (git_refspec__dwim_one(out, spec, refs) < 0)
			return -1;
	}
774

775 776
	return 0;
}
777

778 779 780 781
static void free_refspecs(git_vector *vec)
{
	size_t i;
	git_refspec *spec;
782

783 784 785
	git_vector_foreach(vec, i, spec) {
		git_refspec__free(spec);
		git__free(spec);
786 787
	}

788
	git_vector_clear(vec);
789 790 791 792 793 794 795 796 797 798
}

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);
}

799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817
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;
}

818
int git_remote_download(git_remote *remote)
819
{
820
	int error;
821
	git_vector refs;
822

823
	assert(remote);
824

825
	if (ls_to_vector(&refs, remote) < 0)
826 827
		return -1;

828 829
	free_refspecs(&remote->active_refspecs);

830 831 832 833
	error = dwim_refspecs(&remote->active_refspecs, &remote->refspecs, &refs);
	git_vector_free(&refs);

	if (error < 0)
834
		return error;
835

836
	if ((error = git_fetch_negotiate(remote)) < 0)
837
		return error;
838

839
	return git_fetch_download_pack(remote);
840 841
}

842 843 844 845
int git_remote_fetch(
		git_remote *remote,
		const git_signature *signature,
		const char *reflog_message)
846 847
{
	int error;
848
	git_buf reflog_msg_buf = GIT_BUF_INIT;
849 850

	/* Connect and download everything */
851
	if ((error = git_remote_connect(remote, GIT_DIRECTION_FETCH)) != 0)
852 853
		return error;

854
	error = git_remote_download(remote);
855 856 857 858

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

859 860 861 862
	/* If the download failed, return the error */
	if (error != 0)
		return error;

863 864 865 866 867 868 869 870
	/* 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);
	}

871
	/* Create "remote/foo" branches for all remote branches */
872 873 874
	error = git_remote_update_tips(remote, signature, git_buf_cstr(&reflog_msg_buf));
	git_buf_free(&reflog_msg_buf);
	return error;
875 876
}

877 878 879 880 881 882 883 884
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
885 886 887 888 889

	git_vector_foreach(update_heads, i, remote_ref) {
		if (strcmp(remote_ref->name, fetchspec_src) == 0) {
			*out = remote_ref;
			break;
890 891 892 893 894 895
		}
	}

	return 0;
}

896
static int remote_head_for_ref(git_remote_head **out, git_refspec *spec, git_vector *update_heads, git_reference *ref)
897 898 899
{
	git_reference *resolved_ref = NULL;
	git_buf remote_name = GIT_BUF_INIT;
900 901 902
	git_buf upstream_name = GIT_BUF_INIT;
	git_repository *repo;
	const char *ref_name;
903 904
	int error = 0;

905
	assert(out && spec && ref);
906 907 908

	*out = NULL;

909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924
	repo = git_reference_owner(ref);

	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);
	}

	if ((!git_reference__is_branch(ref_name)) ||
	    (error = git_branch_upstream_name(&upstream_name, repo, ref_name)) < 0 ||
	    (error = git_refspec_rtransform(&remote_name, spec, upstream_name.ptr)) < 0) {
		/* Not an error if there is no upstream */
925 926 927 928 929 930 931 932 933 934 935
		if (error == GIT_ENOTFOUND)
			error = 0;

		goto cleanup;
	}

	error = remote_head_for_fetchspec_src(out, update_heads, git_buf_cstr(&remote_name));

cleanup:
	git_reference_free(resolved_ref);
	git_buf_free(&remote_name);
936
	git_buf_free(&upstream_name);
937 938 939
	return error;
}

940
static int git_remote_write_fetchhead(git_remote *remote, git_refspec *spec, git_vector *update_heads)
941 942 943 944 945 946 947 948 949 950 951
{
	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);

952 953 954 955
	/* no heads, nothing to do */
	if (update_heads->length == 0)
		return 0;

956 957 958 959 960 961 962 963 964
	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 ||
965
			(error = remote_head_for_ref(&merge_remote_ref, spec, update_heads, head_ref)) < 0)
966 967 968 969 970 971 972 973
				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
974
	git_vector_foreach(update_heads, i, remote_ref) {
975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
		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;
}

1005 1006 1007 1008 1009 1010
static int update_tips_for_spec(
		git_remote *remote,
		git_refspec *spec,
		git_vector *refs,
		const git_signature *signature,
		const char *log_message)
1011
{
1012
	int error = 0, autotag;
1013
	unsigned int i = 0;
1014
	git_buf refname = GIT_BUF_INIT;
1015
	git_oid old;
1016
	git_odb *odb;
1017 1018
	git_remote_head *head;
	git_reference *ref;
1019
	git_refspec tagspec;
1020
	git_vector update_heads;
1021

1022 1023
	assert(remote);

1024
	if (git_repository_odb__weakptr(&odb, remote->repo) < 0)
1025 1026
		return -1;

1027
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
1028 1029
		return -1;

1030
	/* Make a copy of the transport's refs */
1031
	if (git_vector_init(&update_heads, 16, NULL) < 0)
1032
		return -1;
1033

1034 1035
	for (; i < refs->length; ++i) {
		head = git_vector_get(refs, i);
1036
		autotag = 0;
1037

1038 1039 1040 1041
		/* Ignore malformed ref names (which also saves us from tag^{} */
		if (!git_reference_is_valid_name(head->name))
			continue;

1042
		if (git_refspec_src_matches(spec, head->name) && spec->dst) {
1043
			if (git_refspec_transform(&refname, spec, head->name) < 0)
1044 1045
				goto on_error;
		} else if (remote->download_tags != GIT_REMOTE_DOWNLOAD_TAGS_NONE) {
1046 1047 1048

			if (remote->download_tags != GIT_REMOTE_DOWNLOAD_TAGS_ALL)
				autotag = 1;
1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061

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

			git_buf_clear(&refname);
			if (git_buf_puts(&refname, head->name) < 0)
				goto on_error;
		} else {
			continue;
		}

		if (autotag && !git_odb_exists(odb, &head->oid))
			continue;
1062

1063 1064 1065
		if (git_vector_insert(&update_heads, head) < 0)
			goto on_error;

1066
		error = git_reference_name_to_id(&old, remote->repo, refname.ptr);
1067
		if (error < 0 && error != GIT_ENOTFOUND)
1068 1069
			goto on_error;

1070
		if (error == GIT_ENOTFOUND)
1071 1072
			memset(&old, 0, GIT_OID_RAWSZ);

1073
		if (!git_oid__cmp(&old, &head->oid))
1074
			continue;
1075

1076
		/* In autotag mode, don't overwrite any locally-existing tags */
1077 1078
		error = git_reference_create(&ref, remote->repo, refname.ptr, &head->oid, !autotag, 
				signature, log_message);
1079
		if (error < 0 && error != GIT_EEXISTS)
1080
			goto on_error;
1081 1082

		git_reference_free(ref);
1083

1084
		if (remote->callbacks.update_tips != NULL) {
Ben Straub committed
1085
			if (remote->callbacks.update_tips(refname.ptr, &old, &head->oid, remote->callbacks.payload) < 0)
1086 1087
				goto on_error;
		}
1088 1089
	}

1090
	if (git_remote_update_fetchhead(remote) &&
1091
	    (error = git_remote_write_fetchhead(remote, spec, &update_heads)) < 0)
1092 1093 1094
		goto on_error;

	git_vector_free(&update_heads);
1095
	git_refspec__free(&tagspec);
1096
	git_buf_free(&refname);
1097 1098 1099
	return 0;

on_error:
1100
	git_vector_free(&update_heads);
1101
	git_refspec__free(&tagspec);
1102 1103
	git_buf_free(&refname);
	return -1;
1104

1105 1106
}

1107 1108 1109 1110
int git_remote_update_tips(
		git_remote *remote,
		const git_signature *signature,
		const char *reflog_message)
1111
{
1112
	git_refspec *spec, tagspec;
1113
	git_vector refs;
1114
	int error;
1115 1116
	size_t i;

1117 1118 1119
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
		return -1;

1120 1121

	if ((error = ls_to_vector(&refs, remote)) < 0)
1122 1123 1124
		goto out;

	if (remote->download_tags == GIT_REMOTE_DOWNLOAD_TAGS_ALL) {
1125
		error = update_tips_for_spec(remote, &tagspec, &refs, signature, reflog_message);
1126 1127
		goto out;
	}
1128

1129
	git_vector_foreach(&remote->active_refspecs, i, spec) {
1130 1131 1132
		if (spec->push)
			continue;

1133
		if ((error = update_tips_for_spec(remote, spec, &refs, signature, reflog_message)) < 0)
1134
			goto out;
1135 1136
	}

1137
out:
1138
	git_vector_free(&refs);
1139 1140
	git_refspec__free(&tagspec);
	return error;
1141 1142
}

1143
int git_remote_connected(const git_remote *remote)
1144
{
1145
	assert(remote);
1146 1147 1148 1149 1150

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

	/* Ask the transport if it's connected. */
1151
	return remote->transport->is_connected(remote->transport);
1152 1153
}

1154 1155
void git_remote_stop(git_remote *remote)
{
1156 1157 1158
	assert(remote);

	if (remote->transport && remote->transport->cancel)
1159
		remote->transport->cancel(remote->transport);
1160 1161
}

1162 1163
void git_remote_disconnect(git_remote *remote)
{
1164 1165
	assert(remote);

1166 1167
	if (git_remote_connected(remote))
		remote->transport->close(remote->transport);
1168 1169
}

Carlos Martín Nieto committed
1170 1171
void git_remote_free(git_remote *remote)
{
1172 1173 1174
	if (remote == NULL)
		return;

1175 1176 1177 1178 1179 1180 1181 1182 1183
	if (remote->transport != NULL) {
		git_remote_disconnect(remote);

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

	git_vector_free(&remote->refs);

1184
	free_refspecs(&remote->refspecs);
1185 1186
	git_vector_free(&remote->refspecs);

1187 1188 1189
	free_refspecs(&remote->active_refspecs);
	git_vector_free(&remote->active_refspecs);

1190
	git__free(remote->url);
1191
	git__free(remote->pushurl);
1192 1193
	git__free(remote->name);
	git__free(remote);
Carlos Martín Nieto committed
1194
}
1195

1196
static int remote_list_cb(const git_config_entry *entry, void *payload)
1197
{
1198
	git_vector *list = payload;
1199 1200 1201
	const char *name = entry->name + strlen("remote.");
	size_t namelen = strlen(name);
	char *remote_name;
1202

1203
	/* we know name matches "remote.<stuff>.(push)?url" */
1204

1205 1206 1207 1208
	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" */
1209
	GITERR_CHECK_ALLOC(remote_name);
1210

1211
	return git_vector_insert(list, remote_name);
1212 1213 1214 1215 1216
}

int git_remote_list(git_strarray *remotes_list, git_repository *repo)
{
	int error;
1217
	git_config *cfg;
1218
	git_vector list = GIT_VECTOR_INIT;
1219

1220 1221
	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
		return error;
1222

1223
	if ((error = git_vector_init(&list, 4, git__strcmp_cb)) < 0)
1224
		return error;
1225

1226
	error = git_config_foreach_match(
1227
		cfg, "^remote\\..*\\.(push)?url$", remote_list_cb, &list);
1228

1229
	if (error < 0) {
1230
		git_vector_free_deep(&list);
1231 1232 1233
		return error;
	}

1234
	git_vector_uniq(&list, git__free);
1235

1236 1237
	remotes_list->strings =
		(char **)git_vector_detach(&remotes_list->count, NULL, &list);
1238

1239
	return 0;
1240
}
1241

1242 1243 1244 1245 1246 1247
void git_remote_check_cert(git_remote *remote, int check)
{
	assert(remote);

	remote->check_cert = check;
}
1248

1249
int git_remote_set_callbacks(git_remote *remote, const git_remote_callbacks *callbacks)
1250 1251 1252
{
	assert(remote && callbacks);

Ben Straub committed
1253
	GITERR_CHECK_VERSION(callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
1254

1255
	memcpy(&remote->callbacks, callbacks, sizeof(git_remote_callbacks));
1256

1257
	if (remote->transport && remote->transport->set_callbacks)
1258
		return remote->transport->set_callbacks(remote->transport,
1259
			remote->callbacks.sideband_progress,
1260
			NULL,
Ben Straub committed
1261
			remote->callbacks.payload);
1262 1263

	return 0;
1264 1265
}

1266 1267 1268 1269 1270 1271 1272
const git_remote_callbacks *git_remote_get_callbacks(git_remote *remote)
{
	assert(remote);

	return &remote->callbacks;
}

1273 1274 1275 1276
int git_remote_set_transport(
	git_remote *remote,
	git_transport_cb transport_cb,
	void *payload)
1277
{
1278
	assert(remote);
1279

1280
	if (remote->transport) {
1281 1282
		giterr_set(GITERR_NET, "A transport is already bound to this remote");
		return -1;
1283
	}
1284

1285 1286
	remote->transport_cb = transport_cb;
	remote->transport_cb_payload = payload;
1287
	return 0;
1288
}
1289

Ben Straub committed
1290
const git_transfer_progress* git_remote_stats(git_remote *remote)
1291 1292 1293 1294 1295
{
	assert(remote);
	return &remote->stats;
}

1296
git_remote_autotag_option_t git_remote_autotag(const git_remote *remote)
1297 1298 1299 1300
{
	return remote->download_tags;
}

Ben Straub committed
1301
void git_remote_set_autotag(git_remote *remote, git_remote_autotag_option_t value)
1302 1303 1304
{
	remote->download_tags = value;
}
1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317

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;

1318 1319 1320
	if (new_name &&
		(git_buf_printf(&new_section_name, "remote.%s", new_name) < 0))
			goto cleanup;
1321 1322 1323 1324

	error = git_config_rename_section(
		repo,
		git_buf_cstr(&old_section_name),
1325
		new_name ? git_buf_cstr(&new_section_name) : NULL);
1326 1327 1328 1329 1330 1331 1332 1333

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

	return error;
}

1334
struct update_data {
1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348
	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;

1349 1350
	return git_config_set_string(
		data->config, entry->name, data->new_remote_name);
1351 1352 1353 1354 1355 1356 1357
}

static int update_branch_remote_config_entry(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1358 1359
	int error;
	struct update_data data = { NULL };
1360

1361 1362
	if ((error = git_repository_config__weakptr(&data.config, repo)) < 0)
		return error;
1363 1364 1365 1366

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

1367
	return git_config_foreach_match(
1368
		data.config, "branch\\..+\\.remote", update_config_entries_cb, &data);
1369 1370 1371
}

static int rename_one_remote_reference(
1372
	git_reference *reference_in,
1373 1374 1375
	const char *old_remote_name,
	const char *new_remote_name)
{
1376
	int error;
1377 1378
	git_reference *ref = NULL, *dummy = NULL;
	git_buf namespace = GIT_BUF_INIT, old_namespace = GIT_BUF_INIT;
1379
	git_buf new_name = GIT_BUF_INIT;
1380
	git_buf log_message = GIT_BUF_INIT;
1381 1382
	size_t pfx_len;
	const char *target;
1383

1384 1385 1386 1387 1388 1389
	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)
1390
		goto cleanup;
1391

1392 1393 1394 1395
	if ((error = git_buf_printf(&log_message,
					"renamed remote %s to %s",
					old_remote_name, new_remote_name)) < 0)
		goto cleanup;
1396

1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420
	if ((error = git_reference_rename(&ref, reference_in, git_buf_cstr(&new_name), 1,
					  NULL, git_buf_cstr(&log_message))) < 0)
		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),
						  NULL, git_buf_cstr(&log_message));

	git_reference_free(dummy);
1421 1422

cleanup:
1423 1424 1425 1426
	git_reference_free(reference_in);
	git_reference_free(ref);
	git_buf_free(&namespace);
	git_buf_free(&old_namespace);
1427
	git_buf_free(&new_name);
1428
	git_buf_free(&log_message);
1429 1430 1431 1432 1433 1434 1435 1436
	return error;
}

static int rename_remote_references(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1437
	int error;
1438
	git_buf buf = GIT_BUF_INIT;
Vicent Marti committed
1439
	git_reference *ref;
1440
	git_reference_iterator *iter;
1441

1442
	if ((error = git_buf_printf(&buf, GIT_REFS_REMOTES_DIR "%s/*", old_name)) < 0)
1443
		return error;
1444

1445 1446
	error = git_reference_iterator_glob_new(&iter, repo, git_buf_cstr(&buf));
	git_buf_free(&buf);
1447

1448 1449 1450 1451
	if (error < 0)
		return error;

	while ((error = git_reference_next(&ref, iter)) == 0) {
1452 1453
		if ((error = rename_one_remote_reference(ref, old_name, new_name)) < 0)
			break;
1454 1455 1456
	}

	git_reference_iterator_free(iter);
1457

1458
	return (error == GIT_ITEROVER) ? 0 : error;
1459 1460
}

1461
static int rename_fetch_refspecs(git_vector *problems, git_remote *remote, const char *new_name)
1462 1463
{
	git_config *config;
1464
	git_buf base = GIT_BUF_INIT, var = GIT_BUF_INIT, val = GIT_BUF_INIT;
1465
	const git_refspec *spec;
1466
	size_t i;
1467
	int error = 0;
1468

1469
	if ((error = git_repository_config__weakptr(&config, remote->repo)) < 0)
1470 1471
		return error;

1472 1473 1474
	if ((error = git_vector_init(problems, 1, NULL)) < 0)
		return error;

1475 1476 1477
	if ((error = git_buf_printf(
			&base, "+refs/heads/*:refs/remotes/%s/*", remote->name)) < 0)
		return error;
1478

1479
	git_vector_foreach(&remote->refspecs, i, spec) {
1480 1481
		if (spec->push)
			continue;
1482

1483
		/* Does the dst part of the refspec follow the expected format? */
1484
		if (strcmp(git_buf_cstr(&base), spec->string)) {
1485
			char *dup;
1486

1487 1488 1489 1490
			dup = git__strdup(spec->string);
			GITERR_CHECK_ALLOC(dup);

			if ((error = git_vector_insert(problems, dup)) < 0)
1491
				break;
1492

1493 1494
			continue;
		}
1495

1496
		/* If we do want to move it to the new section */
1497

1498 1499
		git_buf_clear(&val);
		git_buf_clear(&var);
1500

1501 1502 1503 1504 1505
		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;
1506
			break;
1507
		}
1508

1509 1510
		if ((error = git_config_set_string(
				config, git_buf_cstr(&var), git_buf_cstr(&val))) < 0)
1511
			break;
1512
	}
1513

1514 1515 1516
	git_buf_free(&base);
	git_buf_free(&var);
	git_buf_free(&val);
1517 1518 1519 1520 1521 1522 1523 1524 1525

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

		git_vector_free(problems);
	}

1526 1527 1528
	return error;
}

1529
int git_remote_rename(git_strarray *out, git_remote *remote, const char *new_name)
1530 1531
{
	int error;
1532
	git_vector problem_refspecs;
1533
	char *tmp, *dup;
1534

1535
	assert(out && remote && new_name);
1536

1537
	if (!remote->name) {
1538
		giterr_set(GITERR_INVALID, "Can't rename an anonymous remote.");
1539 1540 1541
		return GIT_EINVALIDSPEC;
	}

1542 1543 1544
	if ((error = ensure_remote_name_is_valid(new_name)) < 0)
		return error;

1545 1546
	if ((error = ensure_remote_doesnot_exist(remote->repo, new_name)) < 0)
		return error;
1547

1548 1549
	if ((error = rename_remote_config_section(remote->repo, remote->name, new_name)) < 0)
		return error;
1550

1551 1552
	if ((error = update_branch_remote_config_entry(remote->repo, remote->name, new_name)) < 0)
		return error;
1553

1554 1555
	if ((error = rename_remote_references(remote->repo, remote->name, new_name)) < 0)
		return error;
1556

1557
	if ((error = rename_fetch_refspecs(&problem_refspecs, remote, new_name)) < 0)
1558
		return error;
1559

1560 1561 1562
	out->count = problem_refspecs.length;
	out->strings = (char **) problem_refspecs.contents;

1563 1564
	dup = git__strdup(new_name);
	GITERR_CHECK_ALLOC(dup);
1565

1566 1567 1568
	tmp = remote->name;
	remote->name = dup;
	git__free(tmp);
1569 1570 1571

	return 0;
}
1572 1573 1574

int git_remote_update_fetchhead(git_remote *remote)
{
Russell Belfer committed
1575
	return (remote->update_fetchhead != 0);
1576 1577 1578 1579
}

void git_remote_set_update_fetchhead(git_remote *remote, int value)
{
Russell Belfer committed
1580
	remote->update_fetchhead = (value != 0);
1581
}
1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601

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;
}
1602 1603 1604 1605 1606 1607

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

1608
	git_vector_foreach(&remote->active_refspecs, i, spec) {
1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623
		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;

1624
	git_vector_foreach(&remote->active_refspecs, i, spec) {
1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641
		if (spec->push)
			continue;

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

	return NULL;
}

void git_remote_clear_refspecs(git_remote *remote)
{
	git_refspec *spec;
	size_t i;

	git_vector_foreach(&remote->refspecs, i, spec) {
		git_refspec__free(spec);
1642
		git__free(spec);
1643 1644 1645 1646
	}
	git_vector_clear(&remote->refspecs);
}

1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659
static int add_and_dwim(git_remote *remote, const char *str, int push)
{
	git_refspec *spec;
	git_vector *vec;

	if (add_refspec(remote, str, !push) < 0)
		return -1;

	vec = &remote->refspecs;
	spec = git_vector_get(vec, vec->length - 1);
	return git_refspec__dwim_one(&remote->active_refspecs, spec, &remote->refs);
}

1660
int git_remote_add_fetch(git_remote *remote, const char *refspec)
1661
{
1662
	return add_and_dwim(remote, refspec, false);
1663 1664
}

1665
int git_remote_add_push(git_remote *remote, const char *refspec)
1666
{
1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708
	return add_and_dwim(remote, refspec, true);
}

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;
	}

	free_refspecs(&remote->active_refspecs);
	git_vector_clear(&remote->active_refspecs);

	return dwim_refspecs(&remote->active_refspecs, &remote->refspecs, &remote->refs);
}

int git_remote_set_fetch_refspecs(git_remote *remote, git_strarray *array)
{
	return set_refspecs(remote, array, false);
}

int git_remote_set_push_refspecs(git_remote *remote, git_strarray *array)
{
	return set_refspecs(remote, array, true);
1709
}
1710

1711
static int copy_refspecs(git_strarray *array, const git_remote *remote, unsigned int push)
1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724
{
	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;

1725
		if ((dup = git__strdup(spec->string)) == NULL)
1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739
			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:
1740
	git_vector_free_deep(&refspecs);
1741 1742 1743 1744

	return -1;
}

1745
int git_remote_get_fetch_refspecs(git_strarray *array, const git_remote *remote)
1746 1747 1748 1749
{
	return copy_refspecs(array, remote, false);
}

1750
int git_remote_get_push_refspecs(git_strarray *array, const git_remote *remote)
1751 1752 1753
{
	return copy_refspecs(array, remote, true);
}
1754

1755
size_t git_remote_refspec_count(const git_remote *remote)
1756 1757 1758 1759
{
	return remote->refspecs.length;
}

1760
const git_refspec *git_remote_get_refspec(const git_remote *remote, size_t n)
1761 1762 1763
{
	return git_vector_get(&remote->refspecs, n);
}
1764

1765
int git_remote_init_callbacks(git_remote_callbacks *opts, unsigned int version)
1766
{
1767 1768 1769
	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
		opts, version, git_remote_callbacks, GIT_REMOTE_CALLBACKS_INIT);
	return 0;
1770
}
1771

1772 1773
/* asserts a branch.<foo>.remote format */
static const char *name_offset(size_t *len_out, const char *name)
1774
{
1775 1776
	size_t prefix_len;
	const char *dot;
1777

1778 1779
	prefix_len = strlen("remote.");
	dot = strchr(name + prefix_len, '.');
1780

1781
	assert(dot);
1782

1783 1784
	*len_out = dot - name - prefix_len;
	return name + prefix_len;
1785 1786 1787 1788 1789 1790 1791 1792
}

static int remove_branch_config_related_entries(
	git_repository *repo,
	const char *remote_name)
{
	int error;
	git_config *config;
1793 1794 1795
	git_config_entry *entry;
	git_config_iterator *iter;
	git_buf buf = GIT_BUF_INIT;
1796 1797 1798 1799

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

1800
	if ((error = git_config_iterator_glob_new(&iter, config, "branch\\..+\\.remote")) < 0)
1801 1802
		return error;

1803 1804 1805 1806
	/* 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;
1807

1808 1809
		if (strcmp(remote_name, entry->value))
			continue;
1810

1811
		branch = name_offset(&branch_len, entry->name);
1812

1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825
		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;
1826 1827
	}

1828 1829 1830 1831 1832
	if (error == GIT_ITEROVER)
		error = 0;

	git_buf_free(&buf);
	git_config_iterator_free(iter);
1833 1834 1835
	return error;
}

1836
static int remove_refs(git_repository *repo, const git_refspec *spec)
1837
{
1838 1839
	git_reference_iterator *iter = NULL;
	git_vector refs;
1840
	const char *name;
1841
	char *dup;
1842
	int error;
1843
	size_t i;
1844

1845
	if ((error = git_vector_init(&refs, 8, NULL)) < 0)
1846 1847
		return error;

1848 1849 1850
	if ((error = git_reference_iterator_new(&iter, repo)) < 0)
		goto cleanup;

1851
	while ((error = git_reference_next_name(&name, iter)) == 0) {
1852 1853 1854 1855 1856 1857 1858 1859
		if (!git_refspec_dst_matches(spec, name))
			continue;

		dup = git__strdup(name);
		if (!dup) {
			error = -1;
			goto cleanup;
		}
1860

1861 1862 1863
		if ((error = git_vector_insert(&refs, dup)) < 0)
			goto cleanup;
	}
1864 1865
	if (error == GIT_ITEROVER)
		error = 0;
1866 1867 1868 1869 1870 1871 1872
	if (error < 0)
		goto cleanup;

	git_vector_foreach(&refs, i, name) {
		if ((error = git_reference_remove(repo, name)) < 0)
			break;
	}
1873

1874 1875 1876 1877 1878 1879
cleanup:
	git_reference_iterator_free(iter);
	git_vector_foreach(&refs, i, dup) {
		git__free(dup);
	}
	git_vector_free(&refs);
1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900
	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 */
	if ((error = git_remote_load(&remote, repo, remote_name)) < 0)
		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;

1901
		if ((error = remove_refs(repo, refspec)) < 0)
1902 1903 1904 1905 1906 1907 1908
			break;
	}

	git_remote_free(remote);
	return error;
}

1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926
int git_remote_delete(git_remote *remote)
{
	int error;
	git_repository *repo;

	assert(remote);

	if (!remote->name) {
		giterr_set(GITERR_INVALID, "Can't delete an anonymous remote.");
		return -1;
	}

	repo = git_remote_owner(remote);

	if ((error = remove_branch_config_related_entries(repo,
		git_remote_name(remote))) < 0)
		return error;

1927 1928 1929 1930 1931 1932 1933
	if ((error = remove_remote_tracking(repo, git_remote_name(remote))) < 0)
		return error;

	if ((error = rename_remote_config_section(
		repo, git_remote_name(remote), NULL)) < 0)
		return error;

1934 1935
	return 0;
}
1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982

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;

	if ((error = git_remote_ls(&heads, &heads_len, remote)) < 0)
		return error;

	if (heads_len == 0)
		return GIT_ENOTFOUND;

	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;

		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);
}