remote.c 59.6 KB
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/*
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 * Copyright (C) the libgit2 contributors. All rights reserved.
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 *
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 * This file is part of libgit2, distributed under the GNU GPL v2 with
 * a Linking Exception. For full terms see the included COPYING file.
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 */

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

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

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

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

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

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

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

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

	return error;
}

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

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

	fmt = fetch ? CONFIG_FETCH_FMT : CONFIG_PUSH_FMT;

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

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

		return error;
	}

	git_refspec__free(&spec);

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

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

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

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

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

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

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

	return git_buf_puts(out, in);
}

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static int create_internal(git_remote **out, git_repository *repo, const char *name, const char *url, const char *fetch)
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{
	git_remote *remote;
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	git_config *config = 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 ((error = git_vector_init(&remote->refs, 32, NULL)) < 0 ||
		(error = canonicalize_url(&canonical_url, url)) < 0)
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		goto on_error;
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	remote->url = apply_insteadof(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
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);
}

Matt Burke committed
690
static int set_transport_custom_headers(git_transport *t, const git_strarray *custom_headers)
691
{
692
	if (!t->set_custom_headers)
693 694 695 696 697 698
		return 0;

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

int git_remote_connect(git_remote *remote, git_direction direction, const git_remote_callbacks *callbacks, const git_strarray *custom_headers)
699 700
{
	git_transport *t;
701
	const char *url;
702
	int flags = GIT_TRANSPORTFLAGS_NONE;
703
	int error;
704
	void *payload = NULL;
705 706
	git_cred_acquire_cb credentials = NULL;
	git_transport_cb transport = NULL;
707

708 709
	assert(remote);

710 711 712
	if (callbacks) {
		GITERR_CHECK_VERSION(callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		credentials = callbacks->credentials;
713
		transport   = callbacks->transport;
714 715 716
		payload     = callbacks->payload;
	}

717 718
	t = remote->transport;

719
	url = git_remote__urlfordirection(remote, direction);
720
	if (url == NULL) {
721 722
		giterr_set(GITERR_INVALID,
			"Malformed remote '%s' - missing URL", remote->name);
723
		return -1;
724
	}
725

726 727
	/* If we don't have a transport object yet, and the caller specified a
	 * custom transport factory, use that */
728 729
	if (!t && transport &&
		(error = transport(&t, remote, payload)) < 0)
730 731 732 733
		return error;

	/* If we still don't have a transport, then use the global
	 * transport registrations which map URI schemes to transport factories */
734 735
	if (!t && (error = git_transport_new(&t, remote, url)) < 0)
		return error;
736

737 738 739
	if ((error = set_transport_custom_headers(t, custom_headers)) != 0)
		goto on_error;

740 741
	if ((error = set_transport_callbacks(t, callbacks)) < 0 ||
	    (error = t->connect(t, url, credentials, payload, direction, flags)) != 0)
742
		goto on_error;
743 744 745

	remote->transport = t;

746
	return 0;
747

748 749
on_error:
	t->free(t);
750 751 752 753

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

754
	return error;
755 756
}

757
int git_remote_ls(const git_remote_head ***out, size_t *size, git_remote *remote)
758
{
759 760
	assert(remote);

761
	if (!remote->transport) {
762
		giterr_set(GITERR_NET, "this remote has never connected");
763 764 765
		return -1;
	}

766
	return remote->transport->ls(out, size, remote->transport);
767 768
}

769 770 771
int git_remote__get_http_proxy(git_remote *remote, bool use_ssl, char **proxy_url)
{
	git_config *cfg;
772
	git_config_entry *ce = NULL;
773
	git_buf val = GIT_BUF_INIT;
774
	int error;
775 776 777

	assert(remote);

778
	if (!proxy_url || !remote->repo)
779 780 781 782
		return -1;

	*proxy_url = NULL;

783 784
	if ((error = git_repository_config__weakptr(&cfg, remote->repo)) < 0)
		return error;
785 786 787 788 789

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

	/* remote.<name>.proxy config setting */
790
	if (remote->name && remote->name[0]) {
791 792
		git_buf buf = GIT_BUF_INIT;

793 794
		if ((error = git_buf_printf(&buf, "remote.%s.proxy", remote->name)) < 0)
			return error;
795

796 797
		error = git_config__lookup_entry(&ce, cfg, git_buf_cstr(&buf), false);
		git_buf_free(&buf);
798

799
		if (error < 0)
800
			return error;
801

802
		if (ce && ce->value) {
803
			*proxy_url = git__strdup(ce->value);
804 805
			goto found;
		}
806 807 808
	}

	/* http.proxy config setting */
809
	if ((error = git_config__lookup_entry(&ce, cfg, "http.proxy", false)) < 0)
810
		return error;
811

812
	if (ce && ce->value) {
813
		*proxy_url = git__strdup(ce->value);
814 815
		goto found;
	}
816 817

	/* HTTP_PROXY / HTTPS_PROXY environment variables */
818
	error = git__getenv(&val, use_ssl ? "HTTPS_PROXY" : "HTTP_PROXY");
819

820 821 822 823 824 825 826
	if (error < 0) {
		if (error == GIT_ENOTFOUND) {
			giterr_clear();
			error = 0;
		}

		return error;
827
	}
828 829 830 831 832

	*proxy_url = git_buf_detach(&val);

found:
	GITERR_CHECK_ALLOC(*proxy_url);
833
	git_config_entry_free(ce);
834 835 836 837

	return 0;
}

838 839
/* DWIM `refspecs` based on `refs` and append the output to `out` */
static int dwim_refspecs(git_vector *out, git_vector *refspecs, git_vector *refs)
840
{
841
	size_t i;
842 843 844
	git_refspec *spec;

	git_vector_foreach(refspecs, i, spec) {
845 846 847
		if (git_refspec__dwim_one(out, spec, refs) < 0)
			return -1;
	}
848

849 850
	return 0;
}
851

852 853 854 855
static void free_refspecs(git_vector *vec)
{
	size_t i;
	git_refspec *spec;
856

857 858 859
	git_vector_foreach(vec, i, spec) {
		git_refspec__free(spec);
		git__free(spec);
860 861
	}

862
	git_vector_clear(vec);
863 864 865 866 867 868 869 870 871 872
}

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);
}

873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891
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;
}

892
int git_remote_download(git_remote *remote, const git_strarray *refspecs, const git_fetch_options *opts)
893
{
894
	int error = -1;
895
	size_t i;
896
	git_vector *to_active, specs = GIT_VECTOR_INIT, refs = GIT_VECTOR_INIT;
897
	const git_remote_callbacks *cbs = NULL;
898
	const git_strarray *custom_headers = NULL;
899

900
	assert(remote);
901

902 903 904
	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
905
		custom_headers = &opts->custom_headers;
906 907 908
	}

	if (!git_remote_connected(remote) &&
909
	    (error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs, custom_headers)) < 0)
910 911
		goto on_error;

912
	if (ls_to_vector(&refs, remote) < 0)
913 914
		return -1;

915 916 917
	if ((git_vector_init(&specs, 0, NULL)) < 0)
		goto on_error;

918
	remote->passed_refspecs = 0;
919
	if (!refspecs || !refspecs->count) {
920 921 922 923 924 925 926 927
		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;
928
		remote->passed_refspecs = 1;
929 930
	}

931 932 933
	free_refspecs(&remote->passive_refspecs);
	if ((error = dwim_refspecs(&remote->passive_refspecs, &remote->refspecs, &refs)) < 0)
		goto on_error;
934

935
	free_refspecs(&remote->active_refspecs);
936
	error = dwim_refspecs(&remote->active_refspecs, to_active, &refs);
937

938
	git_vector_free(&refs);
939 940
	free_refspecs(&specs);
	git_vector_free(&specs);
941 942

	if (error < 0)
943
		return error;
944

945 946 947 948 949
	if (remote->push) {
		git_push_free(remote->push);
		remote->push = NULL;
	}

950
	if ((error = git_fetch_negotiate(remote, opts)) < 0)
951
		return error;
952

953
	return git_fetch_download_pack(remote, cbs);
954 955 956 957 958 959

on_error:
	git_vector_free(&refs);
	free_refspecs(&specs);
	git_vector_free(&specs);
	return error;
960 961
}

962 963
int git_remote_fetch(
		git_remote *remote,
964
		const git_strarray *refspecs,
965
		const git_fetch_options *opts,
966
		const char *reflog_message)
967
{
968
	int error, update_fetchhead = 1;
969
	git_remote_autotag_option_t tagopt = remote->download_tags;
970
	bool prune = false;
971
	git_buf reflog_msg_buf = GIT_BUF_INIT;
972
	const git_remote_callbacks *cbs = NULL;
973
	const git_strarray *custom_headers = NULL;
974 975 976 977

	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
978
		custom_headers = &opts->custom_headers;
979
		update_fetchhead = opts->update_fetchhead;
980
		tagopt = opts->download_tags;
981
	}
982 983

	/* Connect and download everything */
984
	if ((error = git_remote_connect(remote, GIT_DIRECTION_FETCH, cbs, custom_headers)) != 0)
985 986
		return error;

987
	error = git_remote_download(remote, refspecs, opts);
988 989 990 991

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

992 993 994 995
	/* If the download failed, return the error */
	if (error != 0)
		return error;

996 997 998 999 1000 1001 1002 1003
	/* 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);
	}

1004
	/* Create "remote/foo" branches for all remote branches */
1005
	error = git_remote_update_tips(remote, cbs, update_fetchhead, tagopt, git_buf_cstr(&reflog_msg_buf));
1006
	git_buf_free(&reflog_msg_buf);
1007 1008 1009
	if (error < 0)
		return error;

1010 1011
	if (opts && opts->prune == GIT_FETCH_PRUNE)
		prune = true;
1012
	else if (opts && opts->prune == GIT_FETCH_PRUNE_UNSPECIFIED && remote->prune_refs)
1013 1014 1015 1016 1017 1018 1019
		prune = true;
	else if (opts && opts->prune == GIT_FETCH_NO_PRUNE)
		prune = false;
	else
		prune = remote->prune_refs;

	if (prune)
1020
		error = git_remote_prune(remote, cbs);
1021

1022
	return error;
1023 1024
}

1025 1026 1027 1028 1029 1030 1031 1032
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
1033 1034 1035 1036 1037

	git_vector_foreach(update_heads, i, remote_ref) {
		if (strcmp(remote_ref->name, fetchspec_src) == 0) {
			*out = remote_ref;
			break;
1038 1039 1040 1041 1042 1043
		}
	}

	return 0;
}

1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075
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;
}

1076
static int remote_head_for_ref(git_remote_head **out, git_remote *remote, git_refspec *spec, git_vector *update_heads, git_reference *ref)
1077 1078 1079
{
	git_reference *resolved_ref = NULL;
	git_buf remote_name = GIT_BUF_INIT;
1080
	git_config *config = NULL;
1081
	const char *ref_name;
1082
	int error = 0, update;
1083

1084
	assert(out && spec && ref);
1085 1086 1087

	*out = NULL;

1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
	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);
	}

1098
	if ((error = ref_to_update(&update, &remote_name, remote, spec, ref_name)) < 0)
1099 1100
		goto cleanup;

1101 1102
	if (update)
		error = remote_head_for_fetchspec_src(out, update_heads, git_buf_cstr(&remote_name));
1103 1104

cleanup:
Carlos Martín Nieto committed
1105
	git_buf_free(&remote_name);
1106
	git_reference_free(resolved_ref);
1107
	git_config_free(config);
1108 1109 1110
	return error;
}

1111
static int git_remote_write_fetchhead(git_remote *remote, git_refspec *spec, git_vector *update_heads)
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
{
	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);

1123 1124 1125 1126
	/* no heads, nothing to do */
	if (update_heads->length == 0)
		return 0;

1127 1128 1129 1130 1131 1132 1133 1134 1135
	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 ||
1136
			(error = remote_head_for_ref(&merge_remote_ref, remote, spec, update_heads, head_ref)) < 0)
1137 1138 1139 1140 1141 1142 1143 1144
				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
1145
	git_vector_foreach(update_heads, i, remote_ref) {
1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175
		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;
}

1176 1177 1178 1179 1180
/**
 * 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)
1181 1182
{
	git_strarray arr = { 0 };
1183
	size_t i;
1184 1185 1186 1187 1188
	int error;

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

1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
	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);
}

1216
int git_remote_prune(git_remote *remote, const git_remote_callbacks *callbacks)
1217 1218 1219 1220 1221 1222 1223 1224 1225
{
	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 }};

1226 1227 1228
	if (callbacks)
		GITERR_CHECK_VERSION(callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");

1229 1230 1231
	if ((error = ls_to_vector(&remote_refs, remote)) < 0)
		goto cleanup;

1232
	git_vector_set_cmp(&remote_refs, find_head);
1233

1234 1235
	if ((error = prune_candidates(&candidates, remote)) < 0)
		goto cleanup;
1236

1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248
	/*
	 * 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))
1249 1250
				continue;

1251 1252
			if ((error = git_refspec_rtransform(&buf, spec, refname)) < 0)
				goto cleanup;
1253

1254 1255 1256
			key.name = (char *) git_buf_cstr(&buf);
			error = git_vector_search(&pos, &remote_refs, &key);
			git_buf_free(&buf);
1257

1258 1259
			if (error < 0 && error != GIT_ENOTFOUND)
				goto cleanup;
1260

1261
			if (error == GIT_ENOTFOUND)
1262 1263
				continue;

1264 1265 1266 1267 1268 1269
			/* 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;
1270 1271 1272
		}
	}

1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304
	/*
	 * 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;

1305 1306
		if (callbacks && callbacks->update_tips)
			error = callbacks->update_tips(refname, &id, &zero_id, callbacks->payload);
1307 1308 1309 1310 1311

		if (error < 0)
			goto cleanup;
	}

1312 1313
cleanup:
	git_vector_free(&remote_refs);
1314
	git_vector_free_deep(&candidates);
1315 1316 1317
	return error;
}

1318 1319
static int update_tips_for_spec(
		git_remote *remote,
1320
		const git_remote_callbacks *callbacks,
1321
		int update_fetchhead,
1322
		git_remote_autotag_option_t tagopt,
1323 1324 1325
		git_refspec *spec,
		git_vector *refs,
		const char *log_message)
1326
{
1327
	int error = 0, autotag;
1328
	unsigned int i = 0;
1329
	git_buf refname = GIT_BUF_INIT;
1330
	git_oid old;
1331
	git_odb *odb;
1332 1333
	git_remote_head *head;
	git_reference *ref;
1334
	git_refspec tagspec;
1335
	git_vector update_heads;
1336

1337 1338
	assert(remote);

1339
	if (git_repository_odb__weakptr(&odb, remote->repo) < 0)
1340 1341
		return -1;

1342
	if (git_refspec__parse(&tagspec, GIT_REFSPEC_TAGS, true) < 0)
1343 1344
		return -1;

1345
	/* Make a copy of the transport's refs */
1346
	if (git_vector_init(&update_heads, 16, NULL) < 0)
1347
		return -1;
1348

1349 1350
	for (; i < refs->length; ++i) {
		head = git_vector_get(refs, i);
1351
		autotag = 0;
1352
		git_buf_clear(&refname);
1353

1354 1355 1356 1357
		/* Ignore malformed ref names (which also saves us from tag^{} */
		if (!git_reference_is_valid_name(head->name))
			continue;

1358
		/* If we have a tag, see if the auto-follow rules say to update it */
1359
		if (git_refspec_src_matches(&tagspec, head->name)) {
1360
			if (tagopt != GIT_REMOTE_DOWNLOAD_TAGS_NONE) {
1361

1362
				if (tagopt == GIT_REMOTE_DOWNLOAD_TAGS_AUTO)
1363
					autotag = 1;
1364

1365 1366 1367 1368
				git_buf_clear(&refname);
				if (git_buf_puts(&refname, head->name) < 0)
					goto on_error;
			}
1369 1370 1371 1372
		}

		/* If we didn't want to auto-follow the tag, check if the refspec matches */
		if (!autotag && git_refspec_src_matches(spec, head->name)) {
1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
			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;
			}
1386 1387 1388 1389
		}

		/* If we still don't have a refname, we don't want it */
		if (git_buf_len(&refname) == 0) {
1390 1391 1392
			continue;
		}

1393
		/* In autotag mode, only create tags for objects already in db */
1394 1395
		if (autotag && !git_odb_exists(odb, &head->oid))
			continue;
1396

1397
		if (!autotag && git_vector_insert(&update_heads, head) < 0)
1398 1399
			goto on_error;

1400
		error = git_reference_name_to_id(&old, remote->repo, refname.ptr);
1401
		if (error < 0 && error != GIT_ENOTFOUND)
1402 1403
			goto on_error;

1404
		if (error == GIT_ENOTFOUND) {
1405 1406
			memset(&old, 0, GIT_OID_RAWSZ);

1407 1408 1409 1410
			if (autotag && git_vector_insert(&update_heads, head) < 0)
				goto on_error;
		}

1411
		if (!git_oid__cmp(&old, &head->oid))
1412
			continue;
1413

1414
		/* In autotag mode, don't overwrite any locally-existing tags */
1415
		error = git_reference_create(&ref, remote->repo, refname.ptr, &head->oid, !autotag, 
1416
				log_message);
1417
		if (error < 0 && error != GIT_EEXISTS)
1418
			goto on_error;
1419 1420

		git_reference_free(ref);
1421

1422 1423
		if (callbacks && callbacks->update_tips != NULL) {
			if (callbacks->update_tips(refname.ptr, &old, &head->oid, callbacks->payload) < 0)
1424 1425
				goto on_error;
		}
1426 1427
	}

1428
	if (update_fetchhead &&
1429
	    (error = git_remote_write_fetchhead(remote, spec, &update_heads)) < 0)
1430 1431 1432
		goto on_error;

	git_vector_free(&update_heads);
1433
	git_refspec__free(&tagspec);
1434
	git_buf_free(&refname);
1435 1436 1437
	return 0;

on_error:
1438
	git_vector_free(&update_heads);
1439
	git_refspec__free(&tagspec);
1440 1441
	git_buf_free(&refname);
	return -1;
1442

1443 1444
}

1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501
/**
 * 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;
}

1502 1503
static int opportunistic_updates(const git_remote *remote, const git_remote_callbacks *callbacks,
				 git_vector *refs, const char *msg)
1504 1505 1506 1507 1508 1509
{
	size_t i, j, k;
	git_refspec *spec;
	git_remote_head *head;
	git_reference *ref;
	git_buf refname = GIT_BUF_INIT;
1510
	int error = 0;
1511 1512 1513 1514

	i = j = k = 0;

	while ((error = next_head(remote, refs, &spec, &head, &i, &j, &k)) == 0) {
1515
		git_oid old = {{ 0 }};
1516 1517 1518 1519 1520 1521 1522 1523
		/*
		 * 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
		 */

1524
		git_buf_clear(&refname);
1525
		if ((error = git_refspec_transform(&refname, spec, head->name)) < 0)
1526
			goto cleanup;
1527

1528 1529 1530 1531 1532 1533
		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;
1534

1535 1536 1537 1538 1539 1540
		/* 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);
1541
		if (error < 0)
1542 1543 1544 1545 1546 1547
			goto cleanup;

		if (callbacks && callbacks->update_tips != NULL) {
			if (callbacks->update_tips(refname.ptr, &old, &head->oid, callbacks->payload) < 0)
				goto cleanup;
		}
1548 1549
	}

1550 1551 1552 1553 1554 1555
	if (error == GIT_ITEROVER)
		error = 0;

cleanup:
	git_buf_free(&refname);
	return error;
1556 1557
}

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

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

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

1579 1580

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

1583
	if (download_tags == GIT_REMOTE_DOWNLOAD_TAGS_UNSPECIFIED)
1584 1585 1586 1587 1588 1589
		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)
1590
			goto out;
1591
	}
1592

1593
	git_vector_foreach(&remote->active_refspecs, i, spec) {
1594 1595 1596
		if (spec->push)
			continue;

1597
		if ((error = update_tips_for_spec(remote, callbacks, update_fetchhead, tagopt, spec, &refs, reflog_message)) < 0)
1598
			goto out;
1599 1600
	}

1601 1602
	/* only try to do opportunisitic updates if the refpec lists differ */
	if (remote->passed_refspecs)
1603
		error = opportunistic_updates(remote, callbacks, &refs, reflog_message);
1604

1605
out:
1606
	git_vector_free(&refs);
1607 1608
	git_refspec__free(&tagspec);
	return error;
1609 1610
}

1611
int git_remote_connected(const git_remote *remote)
1612
{
1613
	assert(remote);
1614 1615 1616 1617 1618

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

	/* Ask the transport if it's connected. */
1619
	return remote->transport->is_connected(remote->transport);
1620 1621
}

1622 1623
void git_remote_stop(git_remote *remote)
{
1624 1625 1626
	assert(remote);

	if (remote->transport && remote->transport->cancel)
1627
		remote->transport->cancel(remote->transport);
1628 1629
}

1630 1631
void git_remote_disconnect(git_remote *remote)
{
1632 1633
	assert(remote);

1634 1635
	if (git_remote_connected(remote))
		remote->transport->close(remote->transport);
1636 1637
}

Carlos Martín Nieto committed
1638 1639
void git_remote_free(git_remote *remote)
{
1640 1641 1642
	if (remote == NULL)
		return;

1643 1644 1645 1646 1647 1648 1649 1650 1651
	if (remote->transport != NULL) {
		git_remote_disconnect(remote);

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

	git_vector_free(&remote->refs);

1652
	free_refspecs(&remote->refspecs);
1653 1654
	git_vector_free(&remote->refspecs);

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

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

1661
	git_push_free(remote->push);
1662
	git__free(remote->url);
1663
	git__free(remote->pushurl);
1664 1665
	git__free(remote->name);
	git__free(remote);
Carlos Martín Nieto committed
1666
}
1667

1668
static int remote_list_cb(const git_config_entry *entry, void *payload)
1669
{
1670
	git_vector *list = payload;
1671 1672 1673
	const char *name = entry->name + strlen("remote.");
	size_t namelen = strlen(name);
	char *remote_name;
1674

1675
	/* we know name matches "remote.<stuff>.(push)?url" */
1676

1677 1678 1679 1680
	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" */
1681
	GITERR_CHECK_ALLOC(remote_name);
1682

1683
	return git_vector_insert(list, remote_name);
1684 1685 1686 1687 1688
}

int git_remote_list(git_strarray *remotes_list, git_repository *repo)
{
	int error;
1689
	git_config *cfg;
1690
	git_vector list = GIT_VECTOR_INIT;
1691

1692 1693
	if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
		return error;
1694

1695
	if ((error = git_vector_init(&list, 4, git__strcmp_cb)) < 0)
1696
		return error;
1697

1698
	error = git_config_foreach_match(
1699
		cfg, "^remote\\..*\\.(push)?url$", remote_list_cb, &list);
1700

1701
	if (error < 0) {
1702
		git_vector_free_deep(&list);
1703 1704 1705
		return error;
	}

1706
	git_vector_uniq(&list, git__free);
1707

1708 1709
	remotes_list->strings =
		(char **)git_vector_detach(&remotes_list->count, NULL, &list);
1710

1711
	return 0;
1712
}
1713

Ben Straub committed
1714
const git_transfer_progress* git_remote_stats(git_remote *remote)
1715 1716 1717 1718 1719
{
	assert(remote);
	return &remote->stats;
}

1720
git_remote_autotag_option_t git_remote_autotag(const git_remote *remote)
1721 1722 1723 1724
{
	return remote->download_tags;
}

1725
int git_remote_set_autotag(git_repository *repo, const char *remote, git_remote_autotag_option_t value)
1726
{
1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760
	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;
1761
}
1762

1763 1764 1765 1766 1767
int git_remote_prune_refs(const git_remote *remote)
{
	return remote->prune_refs;
}

1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779
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;

1780 1781 1782
	if (new_name &&
		(git_buf_printf(&new_section_name, "remote.%s", new_name) < 0))
			goto cleanup;
1783 1784 1785 1786

	error = git_config_rename_section(
		repo,
		git_buf_cstr(&old_section_name),
1787
		new_name ? git_buf_cstr(&new_section_name) : NULL);
1788 1789 1790 1791 1792 1793 1794 1795

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

	return error;
}

1796
struct update_data {
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810
	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;

1811 1812
	return git_config_set_string(
		data->config, entry->name, data->new_remote_name);
1813 1814 1815 1816 1817 1818 1819
}

static int update_branch_remote_config_entry(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1820 1821
	int error;
	struct update_data data = { NULL };
1822

1823 1824
	if ((error = git_repository_config__weakptr(&data.config, repo)) < 0)
		return error;
1825 1826 1827 1828

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

1829
	return git_config_foreach_match(
1830
		data.config, "branch\\..+\\.remote", update_config_entries_cb, &data);
1831 1832 1833
}

static int rename_one_remote_reference(
1834
	git_reference *reference_in,
1835 1836 1837
	const char *old_remote_name,
	const char *new_remote_name)
{
1838
	int error;
1839 1840
	git_reference *ref = NULL, *dummy = NULL;
	git_buf namespace = GIT_BUF_INIT, old_namespace = GIT_BUF_INIT;
1841
	git_buf new_name = GIT_BUF_INIT;
1842
	git_buf log_message = GIT_BUF_INIT;
1843 1844
	size_t pfx_len;
	const char *target;
1845

1846 1847 1848 1849 1850 1851
	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)
1852
		goto cleanup;
1853

1854 1855 1856 1857
	if ((error = git_buf_printf(&log_message,
					"renamed remote %s to %s",
					old_remote_name, new_remote_name)) < 0)
		goto cleanup;
1858

1859
	if ((error = git_reference_rename(&ref, reference_in, git_buf_cstr(&new_name), 1,
1860
					  git_buf_cstr(&log_message))) < 0)
1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879
		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),
1880
						  git_buf_cstr(&log_message));
1881 1882

	git_reference_free(dummy);
1883 1884

cleanup:
1885 1886 1887 1888
	git_reference_free(reference_in);
	git_reference_free(ref);
	git_buf_free(&namespace);
	git_buf_free(&old_namespace);
1889
	git_buf_free(&new_name);
1890
	git_buf_free(&log_message);
1891 1892 1893 1894 1895 1896 1897 1898
	return error;
}

static int rename_remote_references(
	git_repository *repo,
	const char *old_name,
	const char *new_name)
{
1899
	int error;
1900
	git_buf buf = GIT_BUF_INIT;
Vicent Marti committed
1901
	git_reference *ref;
1902
	git_reference_iterator *iter;
1903

1904
	if ((error = git_buf_printf(&buf, GIT_REFS_REMOTES_DIR "%s/*", old_name)) < 0)
1905
		return error;
1906

1907 1908
	error = git_reference_iterator_glob_new(&iter, repo, git_buf_cstr(&buf));
	git_buf_free(&buf);
1909

1910 1911 1912 1913
	if (error < 0)
		return error;

	while ((error = git_reference_next(&ref, iter)) == 0) {
1914 1915
		if ((error = rename_one_remote_reference(ref, old_name, new_name)) < 0)
			break;
1916 1917 1918
	}

	git_reference_iterator_free(iter);
1919

1920
	return (error == GIT_ITEROVER) ? 0 : error;
1921 1922
}

1923
static int rename_fetch_refspecs(git_vector *problems, git_remote *remote, const char *new_name)
1924 1925
{
	git_config *config;
1926
	git_buf base = GIT_BUF_INIT, var = GIT_BUF_INIT, val = GIT_BUF_INIT;
1927
	const git_refspec *spec;
1928
	size_t i;
1929
	int error = 0;
1930

1931
	if ((error = git_repository_config__weakptr(&config, remote->repo)) < 0)
1932 1933
		return error;

1934 1935 1936
	if ((error = git_vector_init(problems, 1, NULL)) < 0)
		return error;

1937 1938 1939
	if ((error = git_buf_printf(
			&base, "+refs/heads/*:refs/remotes/%s/*", remote->name)) < 0)
		return error;
1940

1941
	git_vector_foreach(&remote->refspecs, i, spec) {
1942 1943
		if (spec->push)
			continue;
1944

1945
		/* Does the dst part of the refspec follow the expected format? */
1946
		if (strcmp(git_buf_cstr(&base), spec->string)) {
1947
			char *dup;
1948

1949 1950 1951 1952
			dup = git__strdup(spec->string);
			GITERR_CHECK_ALLOC(dup);

			if ((error = git_vector_insert(problems, dup)) < 0)
1953
				break;
1954

1955 1956
			continue;
		}
1957

1958
		/* If we do want to move it to the new section */
1959

1960 1961
		git_buf_clear(&val);
		git_buf_clear(&var);
1962

1963 1964 1965 1966 1967
		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;
1968
			break;
1969
		}
1970

1971 1972
		if ((error = git_config_set_string(
				config, git_buf_cstr(&var), git_buf_cstr(&val))) < 0)
1973
			break;
1974
	}
1975

1976 1977 1978
	git_buf_free(&base);
	git_buf_free(&var);
	git_buf_free(&val);
1979 1980 1981 1982 1983 1984 1985 1986 1987

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

		git_vector_free(problems);
	}

1988 1989 1990
	return error;
}

1991
int git_remote_rename(git_strarray *out, git_repository *repo, const char *name, const char *new_name)
1992 1993
{
	int error;
1994
	git_vector problem_refspecs = GIT_VECTOR_INIT;
1995
	git_remote *remote = NULL;
1996

1997
	assert(out && repo && name && new_name);
1998

1999
	if ((error = git_remote_lookup(&remote, repo, name)) < 0)
2000
		return error;
2001

2002
	if ((error = ensure_remote_name_is_valid(new_name)) < 0)
2003
		goto cleanup;
2004

2005 2006
	if ((error = ensure_remote_doesnot_exist(repo, new_name)) < 0)
		goto cleanup;
2007

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

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

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

2017
	if ((error = rename_fetch_refspecs(&problem_refspecs, remote, new_name)) < 0)
2018
		goto cleanup;
2019

2020 2021 2022
	out->count = problem_refspecs.length;
	out->strings = (char **) problem_refspecs.contents;

2023 2024 2025
cleanup:
	if (error < 0)
		git_vector_free(&problem_refspecs);
2026

2027 2028
	git_remote_free(remote);
	return error;
2029
}
2030

2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
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;
}
2050 2051 2052 2053 2054 2055

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

2056
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071
		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;

2072
	git_vector_foreach(&remote->active_refspecs, i, spec) {
2073 2074 2075 2076 2077 2078 2079 2080 2081 2082
		if (spec->push)
			continue;

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

	return NULL;
}

2083
int git_remote_add_fetch(git_repository *repo, const char *remote, const char *refspec)
2084
{
2085
	return write_add_refspec(repo, remote, refspec, true);
2086 2087
}

2088
int git_remote_add_push(git_repository *repo, const char *remote, const char *refspec)
2089
{
2090
	return write_add_refspec(repo, remote, refspec, false);
2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117
}

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;
	}

2118
	return 0;
2119 2120
}

2121
static int copy_refspecs(git_strarray *array, const git_remote *remote, unsigned int push)
2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134
{
	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;

2135
		if ((dup = git__strdup(spec->string)) == NULL)
2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149
			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:
2150
	git_vector_free_deep(&refspecs);
2151 2152 2153 2154

	return -1;
}

2155
int git_remote_get_fetch_refspecs(git_strarray *array, const git_remote *remote)
2156 2157 2158 2159
{
	return copy_refspecs(array, remote, false);
}

2160
int git_remote_get_push_refspecs(git_strarray *array, const git_remote *remote)
2161 2162 2163
{
	return copy_refspecs(array, remote, true);
}
2164

2165
size_t git_remote_refspec_count(const git_remote *remote)
2166 2167 2168 2169
{
	return remote->refspecs.length;
}

2170
const git_refspec *git_remote_get_refspec(const git_remote *remote, size_t n)
2171 2172 2173
{
	return git_vector_get(&remote->refspecs, n);
}
2174

2175
int git_remote_init_callbacks(git_remote_callbacks *opts, unsigned int version)
2176
{
2177 2178 2179
	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
		opts, version, git_remote_callbacks, GIT_REMOTE_CALLBACKS_INIT);
	return 0;
2180
}
2181

2182 2183
/* asserts a branch.<foo>.remote format */
static const char *name_offset(size_t *len_out, const char *name)
2184
{
2185 2186
	size_t prefix_len;
	const char *dot;
2187

2188 2189
	prefix_len = strlen("remote.");
	dot = strchr(name + prefix_len, '.');
2190

2191
	assert(dot);
2192

2193 2194
	*len_out = dot - name - prefix_len;
	return name + prefix_len;
2195 2196 2197 2198 2199 2200 2201 2202
}

static int remove_branch_config_related_entries(
	git_repository *repo,
	const char *remote_name)
{
	int error;
	git_config *config;
2203 2204 2205
	git_config_entry *entry;
	git_config_iterator *iter;
	git_buf buf = GIT_BUF_INIT;
2206 2207 2208 2209

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

2210
	if ((error = git_config_iterator_glob_new(&iter, config, "branch\\..+\\.remote")) < 0)
2211 2212
		return error;

2213 2214 2215 2216
	/* 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;
2217

2218 2219
		if (strcmp(remote_name, entry->value))
			continue;
2220

2221
		branch = name_offset(&branch_len, entry->name);
2222

2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235
		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;
2236 2237
	}

2238 2239 2240 2241 2242
	if (error == GIT_ITEROVER)
		error = 0;

	git_buf_free(&buf);
	git_config_iterator_free(iter);
2243 2244 2245
	return error;
}

2246
static int remove_refs(git_repository *repo, const git_refspec *spec)
2247
{
2248 2249
	git_reference_iterator *iter = NULL;
	git_vector refs;
2250
	const char *name;
2251
	char *dup;
2252
	int error;
2253
	size_t i;
2254

2255
	if ((error = git_vector_init(&refs, 8, NULL)) < 0)
2256 2257
		return error;

2258 2259 2260
	if ((error = git_reference_iterator_new(&iter, repo)) < 0)
		goto cleanup;

2261
	while ((error = git_reference_next_name(&name, iter)) == 0) {
2262 2263 2264 2265 2266 2267 2268 2269
		if (!git_refspec_dst_matches(spec, name))
			continue;

		dup = git__strdup(name);
		if (!dup) {
			error = -1;
			goto cleanup;
		}
2270

2271 2272 2273
		if ((error = git_vector_insert(&refs, dup)) < 0)
			goto cleanup;
	}
2274 2275
	if (error == GIT_ITEROVER)
		error = 0;
2276 2277 2278 2279 2280 2281 2282
	if (error < 0)
		goto cleanup;

	git_vector_foreach(&refs, i, name) {
		if ((error = git_reference_remove(repo, name)) < 0)
			break;
	}
2283

2284 2285 2286 2287 2288 2289
cleanup:
	git_reference_iterator_free(iter);
	git_vector_foreach(&refs, i, dup) {
		git__free(dup);
	}
	git_vector_free(&refs);
2290 2291 2292 2293 2294 2295 2296 2297 2298 2299
	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 */
2300
	if ((error = git_remote_lookup(&remote, repo, remote_name)) < 0)
2301 2302 2303 2304 2305 2306 2307 2308 2309 2310
		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;

2311
		if ((error = remove_refs(repo, refspec)) < 0)
2312 2313 2314 2315 2316 2317 2318
			break;
	}

	git_remote_free(remote);
	return error;
}

2319
int git_remote_delete(git_repository *repo, const char *name)
2320 2321 2322
{
	int error;

2323
	assert(repo && name);
2324

2325 2326 2327
	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)
2328 2329
		return error;

2330 2331
	return 0;
}
2332 2333 2334 2335 2336 2337 2338 2339 2340

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;

2341 2342
	assert(out);

2343 2344 2345 2346 2347 2348
	if ((error = git_remote_ls(&heads, &heads_len, remote)) < 0)
		return error;

	if (heads_len == 0)
		return GIT_ENOTFOUND;

2349 2350 2351
	if (strcmp(heads[0]->name, GIT_HEAD_FILE))
		return GIT_ENOTFOUND;

2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367
	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;

2368 2369 2370
		if (git__prefixcmp(heads[i]->name, GIT_REFS_HEADS_DIR))
			continue;

2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386
		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);
}
2387

2388
int git_remote_upload(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2389 2390
{
	size_t i;
2391 2392
	int error;
	git_push *push;
2393
	git_refspec *spec;
2394
	const git_remote_callbacks *cbs = NULL;
2395
	const git_strarray *custom_headers = NULL;
2396

2397
	assert(remote);
2398

2399
	if (opts) {
2400
		cbs = &opts->callbacks;
2401 2402
		custom_headers = &opts->custom_headers;
	}
2403

2404
	if (!git_remote_connected(remote) &&
2405
	    (error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, custom_headers)) < 0)
2406 2407
		goto cleanup;

2408
	free_refspecs(&remote->active_refspecs);
Leo Yang committed
2409
	if ((error = dwim_refspecs(&remote->active_refspecs, &remote->refspecs, &remote->refs)) < 0)
2410 2411
		goto cleanup;

2412 2413 2414 2415 2416 2417
	if (remote->push) {
		git_push_free(remote->push);
		remote->push = NULL;
	}

	if ((error = git_push_new(&remote->push, remote)) < 0)
2418 2419
		return error;

2420
	push = remote->push;
2421 2422 2423 2424

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

2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436
	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;
		}
2437 2438
	}

2439
	if ((error = git_push_finish(push, cbs)) < 0)
2440 2441
		goto cleanup;

2442
	if (cbs && cbs->push_update_reference &&
2443
	    (error = git_push_status_foreach(push, cbs->push_update_reference, cbs->payload)) < 0)
2444 2445 2446
		goto cleanup;

cleanup:
2447 2448 2449
	return error;
}

2450
int git_remote_push(git_remote *remote, const git_strarray *refspecs, const git_push_options *opts)
2451 2452
{
	int error;
2453
	const git_remote_callbacks *cbs = NULL;
2454
	const git_strarray *custom_headers = NULL;
2455 2456 2457 2458

	if (opts) {
		GITERR_CHECK_VERSION(&opts->callbacks, GIT_REMOTE_CALLBACKS_VERSION, "git_remote_callbacks");
		cbs = &opts->callbacks;
2459
		custom_headers = &opts->custom_headers;
2460
	}
2461 2462 2463

	assert(remote && refspecs);

2464
	if ((error = git_remote_connect(remote, GIT_DIRECTION_PUSH, cbs, custom_headers)) < 0)
2465 2466 2467 2468 2469
		return error;

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

2470
	error = git_remote_update_tips(remote, cbs, 0, 0, NULL);
2471

2472 2473 2474
	git_remote_disconnect(remote);
	return error;
}
2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503

#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;
	}

2504 2505
	if (git_config_iterator_glob_new(&iter, config, regexp) < 0)
		return NULL;
2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539

	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;
}