repository.c 54.6 KB
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/*
Edward Thomson committed
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 * Copyright (C) the libgit2 contributors. All rights reserved.
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 *
Vicent Marti committed
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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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 */
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#include <ctype.h>
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#include "git2/object.h"
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#include "git2/refdb.h"
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#include "git2/sys/repository.h"
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#include "common.h"
#include "repository.h"
#include "commit.h"
#include "tag.h"
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#include "blob.h"
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#include "fileops.h"
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#include "sysdir.h"
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#include "filebuf.h"
#include "index.h"
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#include "config.h"
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#include "refs.h"
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#include "filter.h"
#include "odb.h"
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#include "remote.h"
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#include "merge.h"
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#include "diff_driver.h"
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#include "annotated_commit.h"
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#ifdef GIT_WIN32
# include "win32/w32_util.h"
#endif

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static int check_repositoryformatversion(git_config *config);

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#define GIT_FILE_CONTENT_PREFIX "gitdir:"
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#define GIT_BRANCH_MASTER "master"

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#define GIT_REPO_VERSION 0
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git_buf git_repository__reserved_names_win32[] = {
	{ DOT_GIT, 0, CONST_STRLEN(DOT_GIT) },
	{ GIT_DIR_SHORTNAME, 0, CONST_STRLEN(GIT_DIR_SHORTNAME) }
};
size_t git_repository__reserved_names_win32_len = 2;

git_buf git_repository__reserved_names_posix[] = {
	{ DOT_GIT, 0, CONST_STRLEN(DOT_GIT) },
};
size_t git_repository__reserved_names_posix_len = 1;
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static void set_odb(git_repository *repo, git_odb *odb)
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{
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	if (odb) {
		GIT_REFCOUNT_OWN(odb, repo);
		GIT_REFCOUNT_INC(odb);
	}

	if ((odb = git__swap(repo->_odb, odb)) != NULL) {
		GIT_REFCOUNT_OWN(odb, NULL);
		git_odb_free(odb);
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	}
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}
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static void set_refdb(git_repository *repo, git_refdb *refdb)
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{
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	if (refdb) {
		GIT_REFCOUNT_OWN(refdb, repo);
		GIT_REFCOUNT_INC(refdb);
	}

	if ((refdb = git__swap(repo->_refdb, refdb)) != NULL) {
		GIT_REFCOUNT_OWN(refdb, NULL);
		git_refdb_free(refdb);
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	}
}

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static void set_config(git_repository *repo, git_config *config)
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{
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	if (config) {
		GIT_REFCOUNT_OWN(config, repo);
		GIT_REFCOUNT_INC(config);
	}

	if ((config = git__swap(repo->_config, config)) != NULL) {
		GIT_REFCOUNT_OWN(config, NULL);
		git_config_free(config);
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	}
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	git_repository__cvar_cache_clear(repo);
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}

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static void set_index(git_repository *repo, git_index *index)
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{
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	if (index) {
		GIT_REFCOUNT_OWN(index, repo);
		GIT_REFCOUNT_INC(index);
	}

	if ((index = git__swap(repo->_index, index)) != NULL) {
		GIT_REFCOUNT_OWN(index, NULL);
		git_index_free(index);
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	}
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}

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void git_repository__cleanup(git_repository *repo)
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{
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	assert(repo);
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	git_cache_clear(&repo->objects);
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	git_attr_cache_flush(repo);
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	set_config(repo, NULL);
	set_index(repo, NULL);
	set_odb(repo, NULL);
	set_refdb(repo, NULL);
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}

void git_repository_free(git_repository *repo)
{
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	size_t i;

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	if (repo == NULL)
		return;

	git_repository__cleanup(repo);

	git_cache_free(&repo->objects);
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	git_diff_driver_registry_free(repo->diff_drivers);
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	repo->diff_drivers = NULL;
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	for (i = 0; i < repo->reserved_names.size; i++)
		git_buf_free(git_array_get(repo->reserved_names, i));
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	git_array_clear(repo->reserved_names);
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	git__free(repo->path_gitlink);
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	git__free(repo->path_repository);
	git__free(repo->workdir);
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	git__free(repo->namespace);
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	git__free(repo->ident_name);
	git__free(repo->ident_email);
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	git__memzero(repo, sizeof(*repo));
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	git__free(repo);
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}

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/*
 * Git repository open methods
 *
 * Open a repository object from its path
 */
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static bool valid_repository_path(git_buf *repository_path)
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{
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	/* Check OBJECTS_DIR first, since it will generate the longest path name */
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	if (git_path_contains_dir(repository_path, GIT_OBJECTS_DIR) == false)
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		return false;
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	/* Ensure HEAD file exists */
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	if (git_path_contains_file(repository_path, GIT_HEAD_FILE) == false)
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		return false;
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	if (git_path_contains_dir(repository_path, GIT_REFS_DIR)  == false)
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		return false;
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	return true;
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}

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static git_repository *repository_alloc(void)
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{
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	git_repository *repo = git__calloc(1, sizeof(git_repository));
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	if (repo == NULL ||
		git_cache_init(&repo->objects) < 0)
		goto on_error;

	git_array_init_to_size(repo->reserved_names, 4);
	if (!repo->reserved_names.ptr)
		goto on_error;
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	/* set all the entries in the cvar cache to `unset` */
	git_repository__cvar_cache_clear(repo);

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	return repo;
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on_error:
	if (repo)
		git_cache_free(&repo->objects);

	git__free(repo);
	return NULL;
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}

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int git_repository_new(git_repository **out)
{
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	git_repository *repo;

	*out = repo = repository_alloc();
	GITERR_CHECK_ALLOC(repo);

	repo->is_bare = 1;

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	return 0;
}

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static int load_config_data(git_repository *repo, const git_config *config)
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{
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	int is_bare;
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	/* Try to figure out if it's bare, default to non-bare if it's not set */
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	if (git_config_get_bool(&is_bare, config, "core.bare") < 0)
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		repo->is_bare = 0;
	else
		repo->is_bare = is_bare;
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	return 0;
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}
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static int load_workdir(git_repository *repo, git_config *config, git_buf *parent_path)
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{
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	int         error;
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	git_config_entry *ce;
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	git_buf     worktree = GIT_BUF_INIT;
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	if (repo->is_bare)
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		return 0;
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	if ((error = git_config__lookup_entry(
			&ce, config, "core.worktree", false)) < 0)
		return error;
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	if (ce && ce->value) {
		if ((error = git_path_prettify_dir(
				&worktree, ce->value, repo->path_repository)) < 0)
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			goto cleanup;
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		repo->workdir = git_buf_detach(&worktree);
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	}
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	else if (parent_path && git_path_isdir(parent_path->ptr))
		repo->workdir = git_buf_detach(parent_path);
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	else {
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		if (git_path_dirname_r(&worktree, repo->path_repository) < 0 ||
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		    git_path_to_dir(&worktree) < 0) {
			error = -1;
			goto cleanup;
		}
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		repo->workdir = git_buf_detach(&worktree);
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	}

	GITERR_CHECK_ALLOC(repo->workdir);
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cleanup:
	git_config_entry_free(ce);
	return error;
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}

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/*
 * This function returns furthest offset into path where a ceiling dir
 * is found, so we can stop processing the path at that point.
 *
 * Note: converting this to use git_bufs instead of GIT_PATH_MAX buffers on
 * the stack could remove directories name limits, but at the cost of doing
 * repeated malloc/frees inside the loop below, so let's not do it now.
 */
static int find_ceiling_dir_offset(
	const char *path,
	const char *ceiling_directories)
{
	char buf[GIT_PATH_MAX + 1];
	char buf2[GIT_PATH_MAX + 1];
	const char *ceil, *sep;
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	size_t len, max_len = 0, min_len;
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	assert(path);

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	min_len = (size_t)(git_path_root(path) + 1);
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	if (ceiling_directories == NULL || min_len == 0)
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		return (int)min_len;
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	for (sep = ceil = ceiling_directories; *sep; ceil = sep + 1) {
		for (sep = ceil; *sep && *sep != GIT_PATH_LIST_SEPARATOR; sep++);
		len = sep - ceil;

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		if (len == 0 || len >= sizeof(buf) || git_path_root(ceil) == -1)
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			continue;

		strncpy(buf, ceil, len);
		buf[len] = '\0';

		if (p_realpath(buf, buf2) == NULL)
			continue;

		len = strlen(buf2);
		if (len > 0 && buf2[len-1] == '/')
			buf[--len] = '\0';

		if (!strncmp(path, buf2, len) &&
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			(path[len] == '/' || !path[len]) &&
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			len > max_len)
		{
			max_len = len;
		}
	}

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	return (int)(max_len <= min_len ? min_len : max_len);
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}

/*
 * Read the contents of `file_path` and set `path_out` to the repo dir that
 * it points to.  Before calling, set `path_out` to the base directory that
 * should be used if the contents of `file_path` are a relative path.
 */
static int read_gitfile(git_buf *path_out, const char *file_path)
{
	int     error = 0;
	git_buf file = GIT_BUF_INIT;
	size_t  prefix_len = strlen(GIT_FILE_CONTENT_PREFIX);

	assert(path_out && file_path);

	if (git_futils_readbuffer(&file, file_path) < 0)
		return -1;

	git_buf_rtrim(&file);
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	/* apparently on Windows, some people use backslashes in paths */
	git_path_mkposix(file.ptr);
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	if (git_buf_len(&file) <= prefix_len ||
		memcmp(git_buf_cstr(&file), GIT_FILE_CONTENT_PREFIX, prefix_len) != 0)
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	{
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		giterr_set(GITERR_REPOSITORY,
			"The `.git` file at '%s' is malformed", file_path);
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		error = -1;
	}
	else if ((error = git_path_dirname_r(path_out, file_path)) >= 0) {
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		const char *gitlink = git_buf_cstr(&file) + prefix_len;
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		while (*gitlink && git__isspace(*gitlink)) gitlink++;
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		error = git_path_prettify_dir(
			path_out, gitlink, git_buf_cstr(path_out));
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	}

	git_buf_free(&file);
	return error;
}

static int find_repo(
	git_buf *repo_path,
	git_buf *parent_path,
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	git_buf *link_path,
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	const char *start_path,
	uint32_t flags,
	const char *ceiling_dirs)
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{
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	int error;
	git_buf path = GIT_BUF_INIT;
	struct stat st;
	dev_t initial_device = 0;
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	bool try_with_dot_git = ((flags & GIT_REPOSITORY_OPEN_BARE) != 0);
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	int ceiling_offset;

	git_buf_free(repo_path);

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	if ((error = git_path_prettify(&path, start_path, NULL)) < 0)
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		return error;

	ceiling_offset = find_ceiling_dir_offset(path.ptr, ceiling_dirs);

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	if (!try_with_dot_git &&
		(error = git_buf_joinpath(&path, path.ptr, DOT_GIT)) < 0)
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		return error;

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	while (!error && !git_buf_len(repo_path)) {
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		if (p_stat(path.ptr, &st) == 0) {
			/* check that we have not crossed device boundaries */
			if (initial_device == 0)
				initial_device = st.st_dev;
			else if (st.st_dev != initial_device &&
				(flags & GIT_REPOSITORY_OPEN_CROSS_FS) == 0)
				break;

			if (S_ISDIR(st.st_mode)) {
				if (valid_repository_path(&path)) {
					git_path_to_dir(&path);
					git_buf_set(repo_path, path.ptr, path.size);
					break;
				}
			}
			else if (S_ISREG(st.st_mode)) {
				git_buf repo_link = GIT_BUF_INIT;

				if (!(error = read_gitfile(&repo_link, path.ptr))) {
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					if (valid_repository_path(&repo_link)) {
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						git_buf_swap(repo_path, &repo_link);
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						if (link_path)
							error = git_buf_put(link_path, 
								path.ptr, path.size);
					}

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					git_buf_free(&repo_link);
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					break;
				}
				git_buf_free(&repo_link);
			}
		}

		/* move up one directory level */
		if (git_path_dirname_r(&path, path.ptr) < 0) {
			error = -1;
			break;
		}

		if (try_with_dot_git) {
			/* if we tried original dir with and without .git AND either hit
			 * directory ceiling or NO_SEARCH was requested, then be done.
			 */
			if (path.ptr[ceiling_offset] == '\0' ||
				(flags & GIT_REPOSITORY_OPEN_NO_SEARCH) != 0)
				break;
			/* otherwise look first for .git item */
			error = git_buf_joinpath(&path, path.ptr, DOT_GIT);
		}
		try_with_dot_git = !try_with_dot_git;
	}

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	if (!error && parent_path && !(flags & GIT_REPOSITORY_OPEN_BARE)) {
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		if (!git_buf_len(repo_path))
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			git_buf_clear(parent_path);
		else {
			git_path_dirname_r(parent_path, path.ptr);
			git_path_to_dir(parent_path);
		}
		if (git_buf_oom(parent_path))
			return -1;
	}

	git_buf_free(&path);

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	if (!git_buf_len(repo_path) && !error) {
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		giterr_set(GITERR_REPOSITORY,
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			"Could not find repository from '%s'", start_path);
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		error = GIT_ENOTFOUND;
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	}
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	return error;
}

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int git_repository_open_bare(
	git_repository **repo_ptr,
	const char *bare_path)
{
	int error;
	git_buf path = GIT_BUF_INIT;
	git_repository *repo = NULL;

	if ((error = git_path_prettify_dir(&path, bare_path, NULL)) < 0)
		return error;

	if (!valid_repository_path(&path)) {
		git_buf_free(&path);
		giterr_set(GITERR_REPOSITORY, "Path is not a repository: %s", bare_path);
		return GIT_ENOTFOUND;
	}

	repo = repository_alloc();
	GITERR_CHECK_ALLOC(repo);

	repo->path_repository = git_buf_detach(&path);
	GITERR_CHECK_ALLOC(repo->path_repository);

	/* of course we're bare! */
	repo->is_bare = 1;
	repo->workdir = NULL;

	*repo_ptr = repo;
	return 0;
}

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int git_repository_open_ext(
	git_repository **repo_ptr,
	const char *start_path,
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	unsigned int flags,
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	const char *ceiling_dirs)
{
	int error;
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	git_buf path = GIT_BUF_INIT, parent = GIT_BUF_INIT,
		link_path = GIT_BUF_INIT;
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	git_repository *repo;
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	git_config *config = NULL;
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	if (repo_ptr)
		*repo_ptr = NULL;
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	error = find_repo(
		&path, &parent, &link_path, start_path, flags, ceiling_dirs);

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	if (error < 0 || !repo_ptr)
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		return error;

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	repo = repository_alloc();
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	GITERR_CHECK_ALLOC(repo);
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	repo->path_repository = git_buf_detach(&path);
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	GITERR_CHECK_ALLOC(repo->path_repository);
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	if (link_path.size) {
		repo->path_gitlink = git_buf_detach(&link_path);
		GITERR_CHECK_ALLOC(repo->path_gitlink);
	}

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	/*
	 * We'd like to have the config, but git doesn't particularly
	 * care if it's not there, so we need to deal with that.
	 */

	error = git_repository_config_snapshot(&config, repo);
	if (error < 0 && error != GIT_ENOTFOUND)
		goto cleanup;

	if (config && (error = check_repositoryformatversion(config)) < 0)
		goto cleanup;

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	if ((flags & GIT_REPOSITORY_OPEN_BARE) != 0)
		repo->is_bare = 1;
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	else {

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		if (config &&
		    ((error = load_config_data(repo, config)) < 0 ||
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		     (error = load_workdir(repo, config, &parent)) < 0))
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			goto cleanup;
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	}
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cleanup:
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	git_buf_free(&parent);
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	git_config_free(config);

	if (error < 0)
		git_repository_free(repo);
	else
		*repo_ptr = repo;
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	return error;
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}
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int git_repository_open(git_repository **repo_out, const char *path)
{
	return git_repository_open_ext(
		repo_out, path, GIT_REPOSITORY_OPEN_NO_SEARCH, NULL);
}

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int git_repository_wrap_odb(git_repository **repo_out, git_odb *odb)
{
	git_repository *repo;

	repo = repository_alloc();
	GITERR_CHECK_ALLOC(repo);

	git_repository_set_odb(repo, odb);
	*repo_out = repo;

	return 0;
}

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int git_repository_discover(
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	git_buf *out,
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	const char *start_path,
	int across_fs,
	const char *ceiling_dirs)
{
	uint32_t flags = across_fs ? GIT_REPOSITORY_OPEN_CROSS_FS : 0;

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	assert(start_path);
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	git_buf_sanitize(out);
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	return find_repo(out, NULL, NULL, start_path, flags, ceiling_dirs);
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}

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static int load_config(
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	git_config **out,
	git_repository *repo,
	const char *global_config_path,
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	const char *xdg_config_path,
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	const char *system_config_path,
	const char *programdata_path)
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{
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	int error;
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	git_buf config_path = GIT_BUF_INIT;
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	git_config *cfg = NULL;
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	assert(repo && out);
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	if ((error = git_config_new(&cfg)) < 0)
		return error;
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	error = git_buf_joinpath(
		&config_path, repo->path_repository, GIT_CONFIG_FILENAME_INREPO);
	if (error < 0)
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		goto on_error;
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	if ((error = git_config_add_file_ondisk(
			cfg, config_path.ptr, GIT_CONFIG_LEVEL_LOCAL, 0)) < 0 &&
		error != GIT_ENOTFOUND)
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		goto on_error;

	git_buf_free(&config_path);
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	if (global_config_path != NULL &&
		(error = git_config_add_file_ondisk(
			cfg, global_config_path, GIT_CONFIG_LEVEL_GLOBAL, 0)) < 0 &&
		error != GIT_ENOTFOUND)
		goto on_error;
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	if (xdg_config_path != NULL &&
		(error = git_config_add_file_ondisk(
			cfg, xdg_config_path, GIT_CONFIG_LEVEL_XDG, 0)) < 0 &&
		error != GIT_ENOTFOUND)
		goto on_error;
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	if (system_config_path != NULL &&
		(error = git_config_add_file_ondisk(
			cfg, system_config_path, GIT_CONFIG_LEVEL_SYSTEM, 0)) < 0 &&
		error != GIT_ENOTFOUND)
		goto on_error;
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	if (programdata_path != NULL &&
		(error = git_config_add_file_ondisk(
			cfg, programdata_path, GIT_CONFIG_LEVEL_PROGRAMDATA, 0)) < 0 &&
		error != GIT_ENOTFOUND)
		goto on_error;

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	giterr_clear(); /* clear any lingering ENOTFOUND errors */

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	*out = cfg;
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	return 0;
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on_error:
	git_buf_free(&config_path);
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	git_config_free(cfg);
	*out = NULL;
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	return error;
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}

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static const char *path_unless_empty(git_buf *buf)
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{
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	return git_buf_len(buf) > 0 ? git_buf_cstr(buf) : NULL;
}
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int git_repository_config__weakptr(git_config **out, git_repository *repo)
{
	int error = 0;
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	if (repo->_config == NULL) {
		git_buf global_buf = GIT_BUF_INIT;
		git_buf xdg_buf = GIT_BUF_INIT;
		git_buf system_buf = GIT_BUF_INIT;
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		git_buf programdata_buf = GIT_BUF_INIT;
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		git_config *config;

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		git_config_find_global(&global_buf);
		git_config_find_xdg(&xdg_buf);
		git_config_find_system(&system_buf);
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		git_config_find_programdata(&programdata_buf);
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		/* If there is no global file, open a backend for it anyway */
		if (git_buf_len(&global_buf) == 0)
			git_config__global_location(&global_buf);

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		error = load_config(
			&config, repo,
			path_unless_empty(&global_buf),
			path_unless_empty(&xdg_buf),
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			path_unless_empty(&system_buf),
			path_unless_empty(&programdata_buf));
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		if (!error) {
			GIT_REFCOUNT_OWN(config, repo);

682
			config = git__compare_and_swap(&repo->_config, NULL, config);
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			if (config != NULL) {
				GIT_REFCOUNT_OWN(config, NULL);
				git_config_free(config);
			}
		}
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		git_buf_free(&global_buf);
690
		git_buf_free(&xdg_buf);
691
		git_buf_free(&system_buf);
692
		git_buf_free(&programdata_buf);
693
	}
694

695
	*out = repo->_config;
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	return error;
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}

699
int git_repository_config(git_config **out, git_repository *repo)
700
{
701 702
	if (git_repository_config__weakptr(out, repo) < 0)
		return -1;
703

704 705
	GIT_REFCOUNT_INC(*out);
	return 0;
706 707
}

708 709
int git_repository_config_snapshot(git_config **out, git_repository *repo)
{
710
	int error;
711 712
	git_config *weak;

713 714
	if ((error = git_repository_config__weakptr(&weak, repo)) < 0)
		return error;
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	return git_config_snapshot(out, weak);
}

719 720 721
void git_repository_set_config(git_repository *repo, git_config *config)
{
	assert(repo && config);
722
	set_config(repo, config);
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}

int git_repository_odb__weakptr(git_odb **out, git_repository *repo)
{
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	int error = 0;

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	assert(repo && out);

	if (repo->_odb == NULL) {
732
		git_buf odb_path = GIT_BUF_INIT;
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		git_odb *odb;
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735 736
		if ((error = git_buf_joinpath(&odb_path, repo->path_repository, GIT_OBJECTS_DIR)) < 0)
			return error;
737

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		error = git_odb_open(&odb, odb_path.ptr);
		if (!error) {
			GIT_REFCOUNT_OWN(odb, repo);
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742
			odb = git__compare_and_swap(&repo->_odb, NULL, odb);
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			if (odb != NULL) {
				GIT_REFCOUNT_OWN(odb, NULL);
				git_odb_free(odb);
			}
		}
748

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749
		git_buf_free(&odb_path);
750
	}
751

752
	*out = repo->_odb;
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753
	return error;
754 755
}

756
int git_repository_odb(git_odb **out, git_repository *repo)
757
{
758 759
	if (git_repository_odb__weakptr(out, repo) < 0)
		return -1;
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760

761 762
	GIT_REFCOUNT_INC(*out);
	return 0;
763
}
764

765 766 767
void git_repository_set_odb(git_repository *repo, git_odb *odb)
{
	assert(repo && odb);
768
	set_odb(repo, odb);
769 770
}

771 772
int git_repository_refdb__weakptr(git_refdb **out, git_repository *repo)
{
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	int error = 0;

775 776 777
	assert(out && repo);

	if (repo->_refdb == NULL) {
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		git_refdb *refdb;
779

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		error = git_refdb_open(&refdb, repo);
		if (!error) {
			GIT_REFCOUNT_OWN(refdb, repo);
783

784
			refdb = git__compare_and_swap(&repo->_refdb, NULL, refdb);
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			if (refdb != NULL) {
				GIT_REFCOUNT_OWN(refdb, NULL);
				git_refdb_free(refdb);
			}
		}
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	}

	*out = repo->_refdb;
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	return error;
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}

int git_repository_refdb(git_refdb **out, git_repository *repo)
{
	if (git_repository_refdb__weakptr(out, repo) < 0)
		return -1;

	GIT_REFCOUNT_INC(*out);
	return 0;
}

void git_repository_set_refdb(git_repository *repo, git_refdb *refdb)
{
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	assert(repo && refdb);
808
	set_refdb(repo, refdb);
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}

811 812
int git_repository_index__weakptr(git_index **out, git_repository *repo)
{
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	int error = 0;

815 816 817
	assert(out && repo);

	if (repo->_index == NULL) {
818
		git_buf index_path = GIT_BUF_INIT;
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		git_index *index;
820

821 822
		if ((error = git_buf_joinpath(&index_path, repo->path_repository, GIT_INDEX_FILE)) < 0)
			return error;
823

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		error = git_index_open(&index, index_path.ptr);
		if (!error) {
			GIT_REFCOUNT_OWN(index, repo);
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828
			index = git__compare_and_swap(&repo->_index, NULL, index);
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			if (index != NULL) {
				GIT_REFCOUNT_OWN(index, NULL);
				git_index_free(index);
			}
833

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			error = git_index_set_caps(repo->_index, GIT_INDEXCAP_FROM_OWNER);
		}
836

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		git_buf_free(&index_path);
838 839 840
	}

	*out = repo->_index;
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841
	return error;
842
}
Vicent Marti committed
843

844 845
int git_repository_index(git_index **out, git_repository *repo)
{
846 847
	if (git_repository_index__weakptr(out, repo) < 0)
		return -1;
848

849 850
	GIT_REFCOUNT_INC(*out);
	return 0;
851 852
}

853 854
void git_repository_set_index(git_repository *repo, git_index *index)
{
855
	assert(repo);
856
	set_index(repo, index);
857 858
}

Vicent Marti committed
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int git_repository_set_namespace(git_repository *repo, const char *namespace)
{
	git__free(repo->namespace);

	if (namespace == NULL) {
		repo->namespace = NULL;
		return 0;
	}

	return (repo->namespace = git__strdup(namespace)) ? 0 : -1;
}

const char *git_repository_get_namespace(git_repository *repo)
{
	return repo->namespace;
}

876 877
#ifdef GIT_WIN32
static int reserved_names_add8dot3(git_repository *repo, const char *path)
878
{
879 880
	char *name = git_win32_path_8dot3_name(path);
	const char *def = GIT_DIR_SHORTNAME;
881
	const char *def_dot_git = DOT_GIT;
882
	size_t name_len, def_len = CONST_STRLEN(GIT_DIR_SHORTNAME);
883
	size_t def_dot_git_len = CONST_STRLEN(DOT_GIT);
884
	git_buf *buf;
885

886 887 888 889 890
	if (!name)
		return 0;

	name_len = strlen(name);

891 892
	if ((name_len == def_len && memcmp(name, def, def_len) == 0) || 
		(name_len == def_dot_git_len && memcmp(name, def_dot_git, def_dot_git_len) == 0)) {
893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921
		git__free(name);
		return 0;
	}

	if ((buf = git_array_alloc(repo->reserved_names)) == NULL)
		return -1;

	git_buf_attach(buf, name, name_len);
	return true;
}

bool git_repository__reserved_names(
	git_buf **out, size_t *outlen, git_repository *repo, bool include_ntfs)
{
	GIT_UNUSED(include_ntfs);

	if (repo->reserved_names.size == 0) {
		git_buf *buf;
		size_t i;

		/* Add the static defaults */
		for (i = 0; i < git_repository__reserved_names_win32_len; i++) {
			if ((buf = git_array_alloc(repo->reserved_names)) == NULL)
				goto on_error;

			buf->ptr = git_repository__reserved_names_win32[i].ptr;
			buf->size = git_repository__reserved_names_win32[i].size;
		}

922 923 924 925 926 927
		/* Try to add any repo-specific reserved names - the gitlink file
		 * within a submodule or the repository (if the repository directory
		 * is beneath the workdir).  These are typically `.git`, but should
		 * be protected in case they are not.  Note, repo and workdir paths
		 * are always prettified to end in `/`, so a prefixcmp is safe.
		 */
928
		if (!repo->is_bare) {
929 930
			int (*prefixcmp)(const char *, const char *);
			int error, ignorecase;
931

932 933 934 935 936 937 938 939 940 941 942 943
			error = git_repository__cvar(
				&ignorecase, repo, GIT_CVAR_IGNORECASE);
			prefixcmp = (error || ignorecase) ? git__prefixcmp_icase :
				git__prefixcmp;

			if (repo->path_gitlink &&
				reserved_names_add8dot3(repo, repo->path_gitlink) < 0)
				goto on_error;

			if (repo->path_repository &&
				prefixcmp(repo->path_repository, repo->workdir) == 0 &&
				reserved_names_add8dot3(repo, repo->path_repository) < 0)
944
				goto on_error;
945 946 947
		}
	}

948 949 950 951 952 953 954 955 956 957 958
	*out = repo->reserved_names.ptr;
	*outlen = repo->reserved_names.size;

	return true;

	/* Always give good defaults, even on OOM */
on_error:
	*out = git_repository__reserved_names_win32;
	*outlen = git_repository__reserved_names_win32_len;

	return false;
959
}
960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976
#else
bool git_repository__reserved_names(
	git_buf **out, size_t *outlen, git_repository *repo, bool include_ntfs)
{
	GIT_UNUSED(repo);

	if (include_ntfs) {
		*out = git_repository__reserved_names_win32;
		*outlen = git_repository__reserved_names_win32_len;
	} else {
		*out = git_repository__reserved_names_posix;
		*outlen = git_repository__reserved_names_posix_len;
	}

	return true;
}
#endif
977

978
static int check_repositoryformatversion(git_config *config)
979
{
980
	int version, error;
981

982 983 984 985 986 987
	error = git_config_get_int32(&version, config, "core.repositoryformatversion");
	/* git ignores this if the config variable isn't there */
	if (error == GIT_ENOTFOUND)
		return 0;

	if (error < 0)
988
		return -1;
989

990
	if (GIT_REPO_VERSION < version) {
991 992
		giterr_set(GITERR_REPOSITORY,
			"Unsupported repository version %d. Only versions up to %d are supported.",
993
			version, GIT_REPO_VERSION);
994 995
		return -1;
	}
996

997
	return 0;
998 999
}

1000
static int repo_init_create_head(const char *git_dir, const char *ref_name)
1001
{
1002
	git_buf ref_path = GIT_BUF_INIT;
1003
	git_filebuf ref = GIT_FILEBUF_INIT;
1004
	const char *fmt;
1005

1006
	if (git_buf_joinpath(&ref_path, git_dir, GIT_HEAD_FILE) < 0 ||
1007
		git_filebuf_open(&ref, ref_path.ptr, 0, GIT_REFS_FILE_MODE) < 0)
1008 1009 1010 1011 1012
		goto fail;

	if (!ref_name)
		ref_name = GIT_BRANCH_MASTER;

1013
	if (git__prefixcmp(ref_name, GIT_REFS_DIR) == 0)
1014 1015
		fmt = "ref: %s\n";
	else
1016
		fmt = "ref: " GIT_REFS_HEADS_DIR "%s\n";
1017 1018

	if (git_filebuf_printf(&ref, fmt, ref_name) < 0 ||
1019
		git_filebuf_commit(&ref) < 0)
1020
		goto fail;
1021

1022
	git_buf_free(&ref_path);
1023
	return 0;
1024 1025 1026 1027 1028

fail:
	git_buf_free(&ref_path);
	git_filebuf_cleanup(&ref);
	return -1;
1029 1030
}

1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043
static bool is_chmod_supported(const char *file_path)
{
	struct stat st1, st2;

	if (p_stat(file_path, &st1) < 0)
		return false;

	if (p_chmod(file_path, st1.st_mode ^ S_IXUSR) < 0)
		return false;

	if (p_stat(file_path, &st2) < 0)
		return false;

1044
	return (st1.st_mode != st2.st_mode);
1045 1046
}

1047 1048 1049
static bool is_filesystem_case_insensitive(const char *gitdir_path)
{
	git_buf path = GIT_BUF_INIT;
1050
	int is_insensitive = -1;
1051

1052 1053
	if (!git_buf_joinpath(&path, gitdir_path, "CoNfIg"))
		is_insensitive = git_path_exists(git_buf_cstr(&path));
1054 1055

	git_buf_free(&path);
1056
	return is_insensitive;
1057 1058
}

1059 1060 1061 1062 1063
static bool are_symlinks_supported(const char *wd_path)
{
	git_buf path = GIT_BUF_INIT;
	int fd;
	struct stat st;
1064
	int symlinks_supported = -1;
1065

1066
	if ((fd = git_futils_mktmp(&path, wd_path, 0666)) < 0 ||
1067 1068 1069 1070
		p_close(fd) < 0 ||
		p_unlink(path.ptr) < 0 ||
		p_symlink("testing", path.ptr) < 0 ||
		p_lstat(path.ptr, &st) < 0)
1071
		symlinks_supported = false;
1072
	else
1073
		symlinks_supported = (S_ISLNK(st.st_mode) != 0);
1074 1075 1076 1077

	(void)p_unlink(path.ptr);
	git_buf_free(&path);

1078 1079 1080
	return symlinks_supported;
}

1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
static int create_empty_file(const char *path, mode_t mode)
{
	int fd;

	if ((fd = p_creat(path, mode)) < 0) {
		giterr_set(GITERR_OS, "Error while creating '%s'", path);
		return -1;
	}

	if (p_close(fd) < 0) {
		giterr_set(GITERR_OS, "Error while closing '%s'", path);
		return -1;
	}

	return 0;
}

1098 1099 1100 1101 1102
static int repo_local_config(
	git_config **out,
	git_buf *config_dir,
	git_repository *repo,
	const char *repo_dir)
1103
{
1104
	int error = 0;
1105 1106
	git_config *parent;
	const char *cfg_path;
1107

1108
	if (git_buf_joinpath(config_dir, repo_dir, GIT_CONFIG_FILENAME_INREPO) < 0)
1109
		return -1;
1110
	cfg_path = git_buf_cstr(config_dir);
1111

1112
	/* make LOCAL config if missing */
1113 1114
	if (!git_path_isfile(cfg_path) &&
		(error = create_empty_file(cfg_path, GIT_CONFIG_FILE_MODE)) < 0)
1115
		return error;
1116

1117 1118 1119 1120 1121 1122 1123 1124 1125
	/* if no repo, just open that file directly */
	if (!repo)
		return git_config_open_ondisk(out, cfg_path);

	/* otherwise, open parent config and get that level */
	if ((error = git_repository_config__weakptr(&parent, repo)) < 0)
		return error;

	if (git_config_open_level(out, parent, GIT_CONFIG_LEVEL_LOCAL) < 0) {
1126 1127 1128 1129
		giterr_clear();

		if (!(error = git_config_add_file_ondisk(
				parent, cfg_path, GIT_CONFIG_LEVEL_LOCAL, false)))
1130
			error = git_config_open_level(out, parent, GIT_CONFIG_LEVEL_LOCAL);
1131
	}
1132

1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158
	git_config_free(parent);

	return error;
}

static int repo_init_fs_configs(
	git_config *cfg,
	const char *cfg_path,
	const char *repo_dir,
	const char *work_dir,
	bool update_ignorecase)
{
	int error = 0;

	if (!work_dir)
		work_dir = repo_dir;

	if ((error = git_config_set_bool(
			cfg, "core.filemode", is_chmod_supported(cfg_path))) < 0)
		return error;

	if (!are_symlinks_supported(work_dir)) {
		if ((error = git_config_set_bool(cfg, "core.symlinks", false)) < 0)
			return error;
	} else if (git_config_delete_entry(cfg, "core.symlinks") < 0)
		giterr_clear();
1159

1160 1161 1162 1163 1164 1165 1166
	if (update_ignorecase) {
		if (is_filesystem_case_insensitive(repo_dir)) {
			if ((error = git_config_set_bool(cfg, "core.ignorecase", true)) < 0)
				return error;
		} else if (git_config_delete_entry(cfg, "core.ignorecase") < 0)
			giterr_clear();
	}
1167

1168
#ifdef GIT_USE_ICONV
1169 1170
	if ((error = git_config_set_bool(
			cfg, "core.precomposeunicode",
1171
			git_path_does_fs_decompose_unicode(work_dir))) < 0)
1172
		return error;
1173
	/* on non-iconv platforms, don't even set core.precomposeunicode */
1174 1175
#endif

1176 1177
	return 0;
}
1178

1179 1180 1181 1182 1183 1184 1185
static int repo_init_config(
	const char *repo_dir,
	const char *work_dir,
	uint32_t flags,
	uint32_t mode)
{
	int error = 0;
1186
	git_buf cfg_path = GIT_BUF_INIT, worktree_path = GIT_BUF_INIT;
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
	git_config *config = NULL;
	bool is_bare = ((flags & GIT_REPOSITORY_INIT_BARE) != 0);
	bool is_reinit = ((flags & GIT_REPOSITORY_INIT__IS_REINIT) != 0);

	if ((error = repo_local_config(&config, &cfg_path, NULL, repo_dir)) < 0)
		goto cleanup;

	if (is_reinit && (error = check_repositoryformatversion(config)) < 0)
		goto cleanup;

#define SET_REPO_CONFIG(TYPE, NAME, VAL) do { \
	if ((error = git_config_set_##TYPE(config, NAME, VAL)) < 0) \
		goto cleanup; } while (0)

	SET_REPO_CONFIG(bool, "core.bare", is_bare);
	SET_REPO_CONFIG(int32, "core.repositoryformatversion", GIT_REPO_VERSION);

	if ((error = repo_init_fs_configs(
			config, cfg_path.ptr, repo_dir, work_dir, !is_reinit)) < 0)
		goto cleanup;
1207

1208 1209
	if (!is_bare) {
		SET_REPO_CONFIG(bool, "core.logallrefupdates", true);
1210

1211 1212 1213 1214 1215 1216 1217 1218 1219 1220
		if (!(flags & GIT_REPOSITORY_INIT__NATURAL_WD)) {
			if ((error = git_buf_sets(&worktree_path, work_dir)) < 0)
				goto cleanup;

			if ((flags & GIT_REPOSITORY_INIT_RELATIVE_GITLINK))
				if ((error = git_path_make_relative(&worktree_path, repo_dir)) < 0)
					goto cleanup;

			SET_REPO_CONFIG(string, "core.worktree", worktree_path.ptr);
		} else if (is_reinit) {
Ben Straub committed
1221
			if (git_config_delete_entry(config, "core.worktree") < 0)
1222
				giterr_clear();
1223 1224 1225
		}
	}

1226
	if (mode == GIT_REPOSITORY_INIT_SHARED_GROUP) {
1227 1228
		SET_REPO_CONFIG(int32, "core.sharedrepository", 1);
		SET_REPO_CONFIG(bool, "receive.denyNonFastforwards", true);
1229
	}
1230
	else if (mode == GIT_REPOSITORY_INIT_SHARED_ALL) {
1231 1232 1233
		SET_REPO_CONFIG(int32, "core.sharedrepository", 2);
		SET_REPO_CONFIG(bool, "receive.denyNonFastforwards", true);
	}
1234

1235
cleanup:
1236
	git_buf_free(&cfg_path);
1237
	git_buf_free(&worktree_path);
1238
	git_config_free(config);
1239

1240
	return error;
1241
}
1242

1243
static int repo_reinit_submodule_fs(git_submodule *sm, const char *n, void *p)
1244
{
1245 1246
	git_repository *smrepo = NULL;
	GIT_UNUSED(n); GIT_UNUSED(p);
1247

1248
	if (git_submodule_open(&smrepo, sm) < 0 ||
1249
		git_repository_reinit_filesystem(smrepo, true) < 0)
1250 1251
		giterr_clear();
	git_repository_free(smrepo);
1252

1253 1254
	return 0;
}
1255

1256
int git_repository_reinit_filesystem(git_repository *repo, int recurse)
1257 1258 1259 1260 1261
{
	int error = 0;
	git_buf path = GIT_BUF_INIT;
	git_config *config = NULL;
	const char *repo_dir = git_repository_path(repo);
1262

1263 1264 1265
	if (!(error = repo_local_config(&config, &path, repo, repo_dir)))
		error = repo_init_fs_configs(
			config, path.ptr, repo_dir, git_repository_workdir(repo), true);
1266

1267 1268
	git_config_free(config);
	git_buf_free(&path);
1269 1270 1271

	git_repository__cvar_cache_clear(repo);

1272
	if (!repo->is_bare && recurse)
1273
		(void)git_submodule_foreach(repo, repo_reinit_submodule_fs, NULL);
1274

1275 1276 1277
	return error;
}

1278
static int repo_write_template(
1279 1280 1281 1282
	const char *git_dir,
	bool allow_overwrite,
	const char *file,
	mode_t mode,
1283
	bool hidden,
1284
	const char *content)
1285 1286
{
	git_buf path = GIT_BUF_INIT;
1287
	int fd, error = 0, flags;
1288 1289 1290 1291

	if (git_buf_joinpath(&path, git_dir, file) < 0)
		return -1;

1292 1293 1294 1295 1296 1297
	if (allow_overwrite)
		flags = O_WRONLY | O_CREAT | O_TRUNC;
	else
		flags = O_WRONLY | O_CREAT | O_EXCL;

	fd = p_open(git_buf_cstr(&path), flags, mode);
1298

1299 1300
	if (fd >= 0) {
		error = p_write(fd, content, strlen(content));
1301

1302 1303 1304 1305
		p_close(fd);
	}
	else if (errno != EEXIST)
		error = fd;
1306

1307 1308
#ifdef GIT_WIN32
	if (!error && hidden) {
1309
		if (git_win32__set_hidden(path.ptr, true) < 0)
1310 1311 1312 1313 1314 1315
			error = -1;
	}
#else
	GIT_UNUSED(hidden);
#endif

1316
	git_buf_free(&path);
1317 1318 1319 1320 1321 1322

	if (error)
		giterr_set(GITERR_OS,
			"Failed to initialize repository with template '%s'", file);

	return error;
1323 1324
}

1325
static int repo_write_gitlink(
1326
	const char *in_dir, const char *to_repo, bool use_relative_path)
1327
{
1328 1329
	int error;
	git_buf buf = GIT_BUF_INIT;
1330
	git_buf path_to_repo = GIT_BUF_INIT;
1331 1332 1333 1334 1335
	struct stat st;

	git_path_dirname_r(&buf, to_repo);
	git_path_to_dir(&buf);
	if (git_buf_oom(&buf))
1336
		return -1;
1337

1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357
	/* don't write gitlink to natural workdir */
	if (git__suffixcmp(to_repo, "/" DOT_GIT "/") == 0 &&
		strcmp(in_dir, buf.ptr) == 0)
	{
		error = GIT_PASSTHROUGH;
		goto cleanup;
	}

	if ((error = git_buf_joinpath(&buf, in_dir, DOT_GIT)) < 0)
		goto cleanup;

	if (!p_stat(buf.ptr, &st) && !S_ISREG(st.st_mode)) {
		giterr_set(GITERR_REPOSITORY,
			"Cannot overwrite gitlink file into path '%s'", in_dir);
		error = GIT_EEXISTS;
		goto cleanup;
	}

	git_buf_clear(&buf);

1358 1359 1360 1361 1362 1363 1364
	error = git_buf_sets(&path_to_repo, to_repo);

	if (!error && use_relative_path)
		error = git_path_make_relative(&path_to_repo, in_dir);

	if (!error)
		error = git_buf_join(&buf, ' ', GIT_FILE_CONTENT_PREFIX, path_to_repo.ptr);
1365 1366

	if (!error)
1367
		error = repo_write_template(in_dir, true, DOT_GIT, 0666, true, buf.ptr);
1368 1369 1370

cleanup:
	git_buf_free(&buf);
1371
	git_buf_free(&path_to_repo);
1372 1373 1374
	return error;
}

1375 1376 1377
static mode_t pick_dir_mode(git_repository_init_options *opts)
{
	if (opts->mode == GIT_REPOSITORY_INIT_SHARED_UMASK)
1378
		return 0777;
1379 1380 1381 1382 1383 1384 1385
	if (opts->mode == GIT_REPOSITORY_INIT_SHARED_GROUP)
		return (0775 | S_ISGID);
	if (opts->mode == GIT_REPOSITORY_INIT_SHARED_ALL)
		return (0777 | S_ISGID);
	return opts->mode;
}

1386 1387 1388 1389 1390 1391 1392
#include "repo_template.h"

static int repo_init_structure(
	const char *repo_dir,
	const char *work_dir,
	git_repository_init_options *opts)
{
1393
	int error = 0;
1394
	repo_template_item *tpl;
1395 1396 1397
	bool external_tpl =
		((opts->flags & GIT_REPOSITORY_INIT_EXTERNAL_TEMPLATE) != 0);
	mode_t dmode = pick_dir_mode(opts);
1398
	bool chmod = opts->mode != GIT_REPOSITORY_INIT_SHARED_UMASK;
1399 1400

	/* Hide the ".git" directory */
1401
#ifdef GIT_WIN32
1402
	if ((opts->flags & GIT_REPOSITORY_INIT__HAS_DOTGIT) != 0) {
1403
		if (git_win32__set_hidden(repo_dir, true) < 0) {
1404
			giterr_set(GITERR_OS,
1405 1406 1407
				"Failed to mark Git repository folder as hidden");
			return -1;
		}
1408
	}
1409 1410 1411 1412 1413 1414
#endif

	/* Create the .git gitlink if appropriate */
	if ((opts->flags & GIT_REPOSITORY_INIT_BARE) == 0 &&
		(opts->flags & GIT_REPOSITORY_INIT__NATURAL_WD) == 0)
	{
1415
		if (repo_write_gitlink(work_dir, repo_dir, opts->flags & GIT_REPOSITORY_INIT_RELATIVE_GITLINK) < 0)
1416
			return -1;
1417
	}
1418

1419 1420
	/* Copy external template if requested */
	if (external_tpl) {
Linquize committed
1421 1422 1423
		git_config *cfg = NULL;
		const char *tdir = NULL;
		bool default_template = false;
1424 1425
		git_buf template_buf = GIT_BUF_INIT;

1426 1427
		if (opts->template_path)
			tdir = opts->template_path;
Linquize committed
1428
		else if ((error = git_config_open_default(&cfg)) >= 0) {
1429 1430
			if (!git_config_get_path(&template_buf, cfg, "init.templatedir"))
				tdir = template_buf.ptr;
1431
			giterr_clear();
Linquize committed
1432 1433 1434
		}

		if (!tdir) {
1435
			if (!(error = git_sysdir_find_template_dir(&template_buf)))
1436
				tdir = template_buf.ptr;
Linquize committed
1437
			default_template = true;
1438
		}
1439

1440
		if (tdir) {
1441 1442 1443
			uint32_t cpflags = GIT_CPDIR_COPY_SYMLINKS |
				GIT_CPDIR_SIMPLE_TO_MODE |
				GIT_CPDIR_COPY_DOTFILES;
1444 1445 1446
			if (opts->mode != GIT_REPOSITORY_INIT_SHARED_UMASK)
					cpflags |= GIT_CPDIR_CHMOD_DIRS;
			error = git_futils_cp_r(tdir, repo_dir, cpflags, dmode);
1447
		}
1448

Linquize committed
1449 1450
		git_buf_free(&template_buf);
		git_config_free(cfg);
1451

1452
		if (error < 0) {
Linquize committed
1453
			if (!default_template)
1454 1455 1456 1457 1458
				return error;

			/* if template was default, ignore error and use internal */
			giterr_clear();
			external_tpl = false;
1459
			error = 0;
1460 1461 1462 1463 1464 1465 1466 1467
		}
	}

	/* Copy internal template
	 * - always ensure existence of dirs
	 * - only create files if no external template was specified
	 */
	for (tpl = repo_template; !error && tpl->path; ++tpl) {
1468
		if (!tpl->content) {
1469 1470 1471 1472
			uint32_t mkdir_flags = GIT_MKDIR_PATH;
			if (chmod)
				mkdir_flags |= GIT_MKDIR_CHMOD;

1473 1474
			error = git_futils_mkdir_relative(
				tpl->path, repo_dir, dmode, mkdir_flags, NULL);
1475
		}
1476
		else if (!external_tpl) {
1477 1478 1479 1480 1481
			const char *content = tpl->content;

			if (opts->description && strcmp(tpl->path, GIT_DESC_FILE) == 0)
				content = opts->description;

1482 1483
			error = repo_write_template(
				repo_dir, false, tpl->path, tpl->mode, false, content);
1484
		}
1485 1486
	}

1487
	return error;
1488 1489
}

1490 1491
static int mkdir_parent(git_buf *buf, uint32_t mode, bool skip2)
{
1492 1493 1494
	/* When making parent directories during repository initialization
	 * don't try to set gid or grant world write access
	 */
1495
	return git_futils_mkdir(
1496
		buf->ptr, mode & ~(S_ISGID | 0002),
1497 1498 1499 1500
		GIT_MKDIR_PATH | GIT_MKDIR_VERIFY_DIR |
		(skip2 ? GIT_MKDIR_SKIP_LAST2 : GIT_MKDIR_SKIP_LAST));
}

1501 1502 1503 1504 1505
static int repo_init_directories(
	git_buf *repo_path,
	git_buf *wd_path,
	const char *given_repo,
	git_repository_init_options *opts)
1506
{
1507
	int error = 0;
1508
	bool is_bare, add_dotgit, has_dotgit, natural_wd;
1509
	mode_t dirmode;
1510

1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530
	/* There are three possible rules for what we are allowed to create:
	 * - MKPATH means anything we need
	 * - MKDIR means just the .git directory and its parent and the workdir
	 * - Neither means only the .git directory can be created
	 *
	 * There are 5 "segments" of path that we might need to deal with:
	 * 1. The .git directory
	 * 2. The parent of the .git directory
	 * 3. Everything above the parent of the .git directory
	 * 4. The working directory (often the same as #2)
	 * 5. Everything above the working directory (often the same as #3)
	 *
	 * For all directories created, we start with the init_mode value for
	 * permissions and then strip off bits in some cases:
	 *
	 * For MKPATH, we create #3 (and #5) paths without S_ISGID or S_IWOTH
	 * For MKPATH and MKDIR, we create #2 (and #4) without S_ISGID
	 * For all rules, we create #1 using the untouched init_mode
	 */

1531
	/* set up repo path */
1532

1533 1534
	is_bare = ((opts->flags & GIT_REPOSITORY_INIT_BARE) != 0);

1535 1536
	add_dotgit =
		(opts->flags & GIT_REPOSITORY_INIT_NO_DOTGIT_DIR) == 0 &&
1537
		!is_bare &&
1538 1539
		git__suffixcmp(given_repo, "/" DOT_GIT) != 0 &&
		git__suffixcmp(given_repo, "/" GIT_DIR) != 0;
1540

1541 1542
	if (git_buf_joinpath(repo_path, given_repo, add_dotgit ? GIT_DIR : "") < 0)
		return -1;
1543

1544 1545 1546 1547 1548 1549
	has_dotgit = (git__suffixcmp(repo_path->ptr, "/" GIT_DIR) == 0);
	if (has_dotgit)
		opts->flags |= GIT_REPOSITORY_INIT__HAS_DOTGIT;

	/* set up workdir path */

1550
	if (!is_bare) {
1551
		if (opts->workdir_path) {
1552 1553 1554
			if (git_path_join_unrooted(
					wd_path, opts->workdir_path, repo_path->ptr, NULL) < 0)
				return -1;
1555 1556 1557 1558 1559 1560 1561 1562
		} else if (has_dotgit) {
			if (git_path_dirname_r(wd_path, repo_path->ptr) < 0)
				return -1;
		} else {
			giterr_set(GITERR_REPOSITORY, "Cannot pick working directory"
				" for non-bare repository that isn't a '.git' directory");
			return -1;
		}
1563

1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579
		if (git_path_to_dir(wd_path) < 0)
			return -1;
	} else {
		git_buf_clear(wd_path);
	}

	natural_wd =
		has_dotgit &&
		wd_path->size > 0 &&
		wd_path->size + strlen(GIT_DIR) == repo_path->size &&
		memcmp(repo_path->ptr, wd_path->ptr, wd_path->size) == 0;
	if (natural_wd)
		opts->flags |= GIT_REPOSITORY_INIT__NATURAL_WD;

	/* create directories as needed / requested */

1580
	dirmode = pick_dir_mode(opts);
1581

1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599
	if ((opts->flags & GIT_REPOSITORY_INIT_MKPATH) != 0) {
		/* create path #5 */
		if (wd_path->size > 0 &&
			(error = mkdir_parent(wd_path, dirmode, false)) < 0)
			return error;

		/* create path #3 (if not the same as #5) */
		if (!natural_wd &&
			(error = mkdir_parent(repo_path, dirmode, has_dotgit)) < 0)
			return error;
	}

	if ((opts->flags & GIT_REPOSITORY_INIT_MKDIR) != 0 ||
		(opts->flags & GIT_REPOSITORY_INIT_MKPATH) != 0)
	{
		/* create path #4 */
		if (wd_path->size > 0 &&
			(error = git_futils_mkdir(
1600
				wd_path->ptr, dirmode & ~S_ISGID,
1601 1602 1603 1604 1605 1606
				GIT_MKDIR_VERIFY_DIR)) < 0)
			return error;

		/* create path #2 (if not the same as #4) */
		if (!natural_wd &&
			(error = git_futils_mkdir(
1607
				repo_path->ptr, dirmode & ~S_ISGID,
1608 1609
				GIT_MKDIR_VERIFY_DIR | GIT_MKDIR_SKIP_LAST)) < 0)
			return error;
1610 1611
	}

1612 1613 1614 1615
	if ((opts->flags & GIT_REPOSITORY_INIT_MKDIR) != 0 ||
		(opts->flags & GIT_REPOSITORY_INIT_MKPATH) != 0 ||
		has_dotgit)
	{
1616
		/* create path #1 */
1617
		error = git_futils_mkdir(repo_path->ptr, dirmode,
1618
			GIT_MKDIR_VERIFY_DIR | ((dirmode & S_ISGID) ? GIT_MKDIR_CHMOD : 0));
1619
	}
1620

1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637
	/* prettify both directories now that they are created */

	if (!error) {
		error = git_path_prettify_dir(repo_path, repo_path->ptr, NULL);

		if (!error && wd_path->size > 0)
			error = git_path_prettify_dir(wd_path, wd_path->ptr, NULL);
	}

	return error;
}

static int repo_init_create_origin(git_repository *repo, const char *url)
{
	int error;
	git_remote *remote;

Ben Straub committed
1638
	if (!(error = git_remote_create(&remote, repo, GIT_REMOTE_ORIGIN, url))) {
1639 1640 1641 1642 1643 1644 1645 1646 1647
		git_remote_free(remote);
	}

	return error;
}

int git_repository_init(
	git_repository **repo_out, const char *path, unsigned is_bare)
{
1648
	git_repository_init_options opts = GIT_REPOSITORY_INIT_OPTIONS_INIT;
1649 1650 1651 1652 1653 1654 1655 1656 1657

	opts.flags = GIT_REPOSITORY_INIT_MKPATH; /* don't love this default */
	if (is_bare)
		opts.flags |= GIT_REPOSITORY_INIT_BARE;

	return git_repository_init_ext(repo_out, path, &opts);
}

int git_repository_init_ext(
1658
	git_repository **out,
1659 1660 1661 1662 1663
	const char *given_repo,
	git_repository_init_options *opts)
{
	int error;
	git_buf repo_path = GIT_BUF_INIT, wd_path = GIT_BUF_INIT;
1664
	const char *wd;
1665

1666
	assert(out && given_repo && opts);
1667

Ben Straub committed
1668
	GITERR_CHECK_VERSION(opts, GIT_REPOSITORY_INIT_OPTIONS_VERSION, "git_repository_init_options");
1669

1670 1671
	error = repo_init_directories(&repo_path, &wd_path, given_repo, opts);
	if (error < 0)
1672
		goto cleanup;
1673

1674
	wd = (opts->flags & GIT_REPOSITORY_INIT_BARE) ? NULL : git_buf_cstr(&wd_path);
1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685
	if (valid_repository_path(&repo_path)) {

		if ((opts->flags & GIT_REPOSITORY_INIT_NO_REINIT) != 0) {
			giterr_set(GITERR_REPOSITORY,
				"Attempt to reinitialize '%s'", given_repo);
			error = GIT_EEXISTS;
			goto cleanup;
		}

		opts->flags |= GIT_REPOSITORY_INIT__IS_REINIT;

1686
		error = repo_init_config(
1687
			repo_path.ptr, wd, opts->flags, opts->mode);
1688 1689 1690 1691 1692

		/* TODO: reinitialize the templates */
	}
	else {
		if (!(error = repo_init_structure(
1693
				repo_path.ptr, wd, opts)) &&
1694
			!(error = repo_init_config(
1695
				repo_path.ptr, wd, opts->flags, opts->mode)))
1696
			error = repo_init_create_head(
1697
				repo_path.ptr, opts->initial_head);
1698
	}
1699 1700 1701
	if (error < 0)
		goto cleanup;

1702
	error = git_repository_open(out, repo_path.ptr);
1703

1704
	if (!error && opts->origin_url)
1705
		error = repo_init_create_origin(*out, opts->origin_url);
1706 1707

cleanup:
1708 1709 1710 1711
	git_buf_free(&repo_path);
	git_buf_free(&wd_path);

	return error;
1712
}
1713

1714
int git_repository_head_detached(git_repository *repo)
1715 1716
{
	git_reference *ref;
1717
	git_odb *odb = NULL;
1718
	int exists;
1719

1720 1721
	if (git_repository_odb__weakptr(&odb, repo) < 0)
		return -1;
1722

1723 1724
	if (git_reference_lookup(&ref, repo, GIT_HEAD_FILE) < 0)
		return -1;
1725

1726 1727
	if (git_reference_type(ref) == GIT_REF_SYMBOLIC) {
		git_reference_free(ref);
1728
		return 0;
1729
	}
1730

1731
	exists = git_odb_exists(odb, git_reference_target(ref));
1732 1733

	git_reference_free(ref);
1734
	return exists;
1735 1736
}

1737
int git_repository_head(git_reference **head_out, git_repository *repo)
1738
{
1739
	git_reference *head;
1740 1741
	int error;

1742 1743 1744 1745 1746 1747 1748 1749
	if ((error = git_reference_lookup(&head, repo, GIT_HEAD_FILE)) < 0)
		return error;

	if (git_reference_type(head) == GIT_REF_OID) {
		*head_out = head;
		return 0;
	}

1750
	error = git_reference_lookup_resolved(head_out, repo, git_reference_symbolic_target(head), -1);
1751
	git_reference_free(head);
1752

1753
	return error == GIT_ENOTFOUND ? GIT_EUNBORNBRANCH : error;
1754 1755
}

1756
int git_repository_head_unborn(git_repository *repo)
1757
{
1758
	git_reference *ref = NULL;
1759 1760 1761
	int error;

	error = git_repository_head(&ref, repo);
1762
	git_reference_free(ref);
1763

1764 1765
	if (error == GIT_EUNBORNBRANCH) {
		giterr_clear();
1766
		return 1;
1767
	}
1768

1769 1770 1771 1772
	if (error < 0)
		return -1;

	return 0;
1773
}
1774

1775
static int at_least_one_cb(const char *refname, void *payload)
1776
{
1777 1778
	GIT_UNUSED(refname);
	GIT_UNUSED(payload);
1779
	return GIT_PASSTHROUGH;
1780
}
1781

1782 1783
static int repo_contains_no_reference(git_repository *repo)
{
1784
	int error = git_reference_foreach_name(repo, &at_least_one_cb, NULL);
1785

1786
	if (error == GIT_PASSTHROUGH)
1787
		return 0;
1788

1789 1790
	if (!error)
		return 1;
1791

1792
	return error;
1793
}
1794

1795 1796 1797
int git_repository_is_empty(git_repository *repo)
{
	git_reference *head = NULL;
1798
	int is_empty = 0;
1799

1800
	if (git_reference_lookup(&head, repo, GIT_HEAD_FILE) < 0)
1801 1802
		return -1;

1803 1804 1805 1806 1807
	if (git_reference_type(head) == GIT_REF_SYMBOLIC)
		is_empty =
			(strcmp(git_reference_symbolic_target(head),
					GIT_REFS_HEADS_DIR "master") == 0) &&
			repo_contains_no_reference(repo);
1808 1809

	git_reference_free(head);
1810 1811

	return is_empty;
1812 1813
}

1814
const char *git_repository_path(git_repository *repo)
1815 1816
{
	assert(repo);
1817 1818
	return repo->path_repository;
}
1819

1820 1821 1822
const char *git_repository_workdir(git_repository *repo)
{
	assert(repo);
1823

1824 1825
	if (repo->is_bare)
		return NULL;
1826

1827 1828
	return repo->workdir;
}
1829

1830 1831
int git_repository_set_workdir(
	git_repository *repo, const char *workdir, int update_gitlink)
1832
{
1833
	int error = 0;
1834 1835
	git_buf path = GIT_BUF_INIT;

1836
	assert(repo && workdir);
1837

1838 1839
	if (git_path_prettify_dir(&path, workdir, NULL) < 0)
		return -1;
1840

1841 1842
	if (repo->workdir && strcmp(repo->workdir, path.ptr) == 0)
		return 0;
1843

1844 1845 1846 1847 1848 1849
	if (update_gitlink) {
		git_config *config;

		if (git_repository_config__weakptr(&config, repo) < 0)
			return -1;

1850
		error = repo_write_gitlink(path.ptr, git_repository_path(repo), false);
1851 1852 1853

		/* passthrough error means gitlink is unnecessary */
		if (error == GIT_PASSTHROUGH)
Ben Straub committed
1854
			error = git_config_delete_entry(config, "core.worktree");
1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871
		else if (!error)
			error = git_config_set_string(config, "core.worktree", path.ptr);

		if (!error)
			error = git_config_set_bool(config, "core.bare", false);
	}

	if (!error) {
		char *old_workdir = repo->workdir;

		repo->workdir = git_buf_detach(&path);
		repo->is_bare = 0;

		git__free(old_workdir);
	}

	return error;
1872
}
1873 1874 1875 1876 1877 1878

int git_repository_is_bare(git_repository *repo)
{
	assert(repo);
	return repo->is_bare;
}
1879

1880 1881 1882 1883 1884 1885 1886 1887 1888 1889
int git_repository_set_bare(git_repository *repo)
{
	int error;
	git_config *config;

	assert(repo);

	if (repo->is_bare)
		return 0;

1890 1891 1892
	if ((error = git_repository_config__weakptr(&config, repo)) < 0)
		return error;

1893
	if ((error = git_config_set_bool(config, "core.bare", true)) < 0)
1894
		return error;
1895

1896 1897
	if ((error = git_config__update_entry(config, "core.worktree", NULL, true, true)) < 0)
		return error;
1898 1899 1900 1901 1902

	git__free(repo->workdir);
	repo->workdir = NULL;
	repo->is_bare = 1;

1903
	return 0;
1904 1905
}

1906 1907
int git_repository_head_tree(git_tree **tree, git_repository *repo)
{
1908 1909 1910
	git_reference *head;
	git_object *obj;
	int error;
1911

1912 1913
	if ((error = git_repository_head(&head, repo)) < 0)
		return error;
1914

1915 1916
	if ((error = git_reference_peel(&obj, head, GIT_OBJ_TREE)) < 0)
		goto cleanup;
1917 1918

	*tree = (git_tree *)obj;
1919 1920 1921 1922

cleanup:
	git_reference_free(head);
	return error;
1923
}
1924

1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946
int git_repository__set_orig_head(git_repository *repo, const git_oid *orig_head)
{
	git_filebuf file = GIT_FILEBUF_INIT;
	git_buf file_path = GIT_BUF_INIT;
	char orig_head_str[GIT_OID_HEXSZ];
	int error = 0;

	git_oid_fmt(orig_head_str, orig_head);

	if ((error = git_buf_joinpath(&file_path, repo->path_repository, GIT_ORIG_HEAD_FILE)) == 0 &&
		(error = git_filebuf_open(&file, file_path.ptr, GIT_FILEBUF_FORCE, GIT_MERGE_FILE_MODE)) == 0 &&
		(error = git_filebuf_printf(&file, "%.*s\n", GIT_OID_HEXSZ, orig_head_str)) == 0)
		error = git_filebuf_commit(&file);

	if (error < 0)
		git_filebuf_cleanup(&file);

	git_buf_free(&file_path);

	return error;
}

1947
int git_repository_message(git_buf *out, git_repository *repo)
1948
{
1949
	git_buf path = GIT_BUF_INIT;
Vicent Marti committed
1950 1951
	struct stat st;
	int error;
1952

1953
	git_buf_sanitize(out);
1954

Edward Thomson committed
1955
	if (git_buf_joinpath(&path, repo->path_repository, GIT_MERGE_MSG_FILE) < 0)
Vicent Marti committed
1956
		return -1;
1957

1958
	if ((error = p_stat(git_buf_cstr(&path), &st)) < 0) {
1959 1960
		if (errno == ENOENT)
			error = GIT_ENOTFOUND;
1961
		giterr_set(GITERR_OS, "Could not access message file");
1962 1963
	} else {
		error = git_futils_readbuffer(out, git_buf_cstr(&path));
Vicent Marti committed
1964
	}
1965

1966
	git_buf_free(&path);
1967 1968

	return error;
1969 1970 1971 1972
}

int git_repository_message_remove(git_repository *repo)
{
Vicent Marti committed
1973 1974
	git_buf path = GIT_BUF_INIT;
	int error;
1975

Edward Thomson committed
1976
	if (git_buf_joinpath(&path, repo->path_repository, GIT_MERGE_MSG_FILE) < 0)
Vicent Marti committed
1977
		return -1;
1978 1979 1980 1981 1982 1983

	error = p_unlink(git_buf_cstr(&path));
	git_buf_free(&path);

	return error;
}
1984 1985

int git_repository_hashfile(
Linquize committed
1986 1987 1988 1989 1990
	git_oid *out,
	git_repository *repo,
	const char *path,
	git_otype type,
	const char *as_path)
1991 1992
{
	int error;
1993
	git_filter_list *fl = NULL;
1994
	git_file fd = -1;
1995 1996 1997
	git_off_t len;
	git_buf full_path = GIT_BUF_INIT;

1998 1999 2000 2001 2002 2003
	assert(out && path && repo); /* as_path can be NULL */

	/* At some point, it would be nice if repo could be NULL to just
	 * apply filter rules defined in system and global files, but for
	 * now that is not possible because git_filters_load() needs it.
	 */
2004 2005

	error = git_path_join_unrooted(
2006
		&full_path, path, git_repository_workdir(repo), NULL);
2007 2008 2009 2010 2011 2012 2013 2014
	if (error < 0)
		return error;

	if (!as_path)
		as_path = path;

	/* passing empty string for "as_path" indicated --no-filters */
	if (strlen(as_path) > 0) {
Russell Belfer committed
2015
		error = git_filter_list_load(
2016
			&fl, repo, NULL, as_path,
2017
			GIT_FILTER_TO_ODB, GIT_FILTER_DEFAULT);
2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033
		if (error < 0)
			return error;
	} else {
		error = 0;
	}

	/* at this point, error is a count of the number of loaded filters */

	fd = git_futils_open_ro(full_path.ptr);
	if (fd < 0) {
		error = fd;
		goto cleanup;
	}

	len = git_futils_filesize(fd);
	if (len < 0) {
2034
		error = (int)len;
2035 2036 2037 2038 2039 2040 2041 2042 2043
		goto cleanup;
	}

	if (!git__is_sizet(len)) {
		giterr_set(GITERR_OS, "File size overflow for 32-bit systems");
		error = -1;
		goto cleanup;
	}

2044
	error = git_odb__hashfd_filtered(out, fd, (size_t)len, type, fl);
2045 2046

cleanup:
2047 2048
	if (fd >= 0)
		p_close(fd);
2049
	git_filter_list_free(fl);
2050 2051 2052 2053 2054
	git_buf_free(&full_path);

	return error;
}

2055
static int checkout_message(git_buf *out, git_reference *old, const char *new)
2056
{
2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
	git_buf_puts(out, "checkout: moving from ");

	if (git_reference_type(old) == GIT_REF_SYMBOLIC)
		git_buf_puts(out, git_reference__shorthand(git_reference_symbolic_target(old)));
	else
		git_buf_puts(out, git_oid_tostr_s(git_reference_target(old)));

	git_buf_puts(out, " to ");

	if (git_reference__is_branch(new))
		git_buf_puts(out, git_reference__shorthand(new));
	else
		git_buf_puts(out, new);

	if (git_buf_oom(out))
		return -1;

	return 0;
2075 2076 2077 2078
}

int git_repository_set_head(
	git_repository* repo,
2079
	const char* refname)
2080
{
2081 2082
	git_reference *ref = NULL, *current = NULL, *new_head = NULL;
	git_buf log_message = GIT_BUF_INIT;
2083 2084 2085 2086
	int error;

	assert(repo && refname);

2087 2088 2089 2090 2091 2092
	if ((error = git_reference_lookup(&current, repo, GIT_HEAD_FILE)) < 0)
		return error;

	if ((error = checkout_message(&log_message, current, refname)) < 0)
		goto cleanup;

2093 2094
	error = git_reference_lookup(&ref, repo, refname);
	if (error < 0 && error != GIT_ENOTFOUND)
2095
		goto cleanup;
2096 2097

	if (!error) {
2098 2099
		if (git_reference_is_branch(ref)) {
			error = git_reference_symbolic_create(&new_head, repo, GIT_HEAD_FILE,
2100
					git_reference_name(ref), true, git_buf_cstr(&log_message));
2101
		} else {
2102
			error = git_repository_set_head_detached(repo, git_reference_target(ref));
2103
		}
2104
	} else if (git_reference__is_branch(refname)) {
2105
		error = git_reference_symbolic_create(&new_head, repo, GIT_HEAD_FILE, refname,
2106
				true, git_buf_cstr(&log_message));
2107
	}
2108

2109
cleanup:
2110
	git_buf_free(&log_message);
2111
	git_reference_free(current);
2112 2113 2114 2115 2116
	git_reference_free(ref);
	git_reference_free(new_head);
	return error;
}

2117
static int detach(git_repository *repo, const git_oid *id, const char *from)
2118 2119
{
	int error;
2120 2121 2122
	git_buf log_message = GIT_BUF_INIT;
	git_object *object = NULL, *peeled = NULL;
	git_reference *new_head = NULL, *current = NULL;
2123

2124
	assert(repo && id);
2125

2126
	if ((error = git_reference_lookup(&current, repo, GIT_HEAD_FILE)) < 0)
2127 2128
		return error;

2129
	if ((error = git_object_lookup(&object, repo, id, GIT_OBJ_ANY)) < 0)
2130 2131
		goto cleanup;

2132 2133 2134
	if ((error = git_object_peel(&peeled, object, GIT_OBJ_COMMIT)) < 0)
		goto cleanup;

2135 2136 2137 2138
	if (from == NULL)
		from = git_oid_tostr_s(git_object_id(peeled));

	if ((error = checkout_message(&log_message, current, from)) < 0)
2139 2140 2141
		goto cleanup;

	error = git_reference_create(&new_head, repo, GIT_HEAD_FILE, git_object_id(peeled), true, git_buf_cstr(&log_message));
2142 2143

cleanup:
2144
	git_buf_free(&log_message);
2145 2146
	git_object_free(object);
	git_object_free(peeled);
2147
	git_reference_free(current);
2148 2149 2150 2151
	git_reference_free(new_head);
	return error;
}

2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167
int git_repository_set_head_detached(
	git_repository* repo,
	const git_oid* commitish)
{
	return detach(repo, commitish, NULL);
}

int git_repository_set_head_detached_from_annotated(
	git_repository *repo,
	const git_annotated_commit *commitish)
{
	assert(repo && commitish);

	return detach(repo, git_annotated_commit_id(commitish), commitish->ref_name);
}

2168
int git_repository_detach_head(git_repository* repo)
2169
{
2170
	git_reference *old_head = NULL,	*new_head = NULL, *current = NULL;
2171
	git_object *object = NULL;
2172
	git_buf log_message = GIT_BUF_INIT;
2173
	int error;
2174 2175 2176

	assert(repo);

2177
	if ((error = git_reference_lookup(&current, repo, GIT_HEAD_FILE)) < 0)
2178
		return error;
2179

2180 2181 2182
	if ((error = git_repository_head(&old_head, repo)) < 0)
		goto cleanup;

2183
	if ((error = git_object_lookup(&object, repo, git_reference_target(old_head), GIT_OBJ_COMMIT)) < 0)
2184 2185
		goto cleanup;

2186 2187 2188
	if ((error = checkout_message(&log_message, current, git_oid_tostr_s(git_object_id(object)))) < 0)
		goto cleanup;

2189
	error = git_reference_create(&new_head, repo, GIT_HEAD_FILE, git_reference_target(old_head),
2190
			1, git_buf_cstr(&log_message));
2191 2192

cleanup:
2193
	git_buf_free(&log_message);
2194 2195 2196
	git_object_free(object);
	git_reference_free(old_head);
	git_reference_free(new_head);
2197
	git_reference_free(current);
2198 2199
	return error;
}
Edward Thomson committed
2200

2201 2202 2203 2204
/**
 * Loosely ported from git.git
 * https://github.com/git/git/blob/master/contrib/completion/git-prompt.sh#L198-289
 */
Edward Thomson committed
2205 2206 2207 2208 2209 2210 2211 2212 2213 2214
int git_repository_state(git_repository *repo)
{
	git_buf repo_path = GIT_BUF_INIT;
	int state = GIT_REPOSITORY_STATE_NONE;

	assert(repo);

	if (git_buf_puts(&repo_path, repo->path_repository) < 0)
		return -1;

2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225
	if (git_path_contains_file(&repo_path, GIT_REBASE_MERGE_INTERACTIVE_FILE))
		state = GIT_REPOSITORY_STATE_REBASE_INTERACTIVE;
	else if (git_path_contains_dir(&repo_path, GIT_REBASE_MERGE_DIR))
		state = GIT_REPOSITORY_STATE_REBASE_MERGE;
	else if (git_path_contains_file(&repo_path, GIT_REBASE_APPLY_REBASING_FILE))
		state = GIT_REPOSITORY_STATE_REBASE;
	else if (git_path_contains_file(&repo_path, GIT_REBASE_APPLY_APPLYING_FILE))
		state = GIT_REPOSITORY_STATE_APPLY_MAILBOX;
	else if (git_path_contains_dir(&repo_path, GIT_REBASE_APPLY_DIR))
		state = GIT_REPOSITORY_STATE_APPLY_MAILBOX_OR_REBASE;
	else if (git_path_contains_file(&repo_path, GIT_MERGE_HEAD_FILE))
Edward Thomson committed
2226
		state = GIT_REPOSITORY_STATE_MERGE;
2227
	else if (git_path_contains_file(&repo_path, GIT_REVERT_HEAD_FILE)) {
Edward Thomson committed
2228
		state = GIT_REPOSITORY_STATE_REVERT;
2229 2230 2231 2232
		if (git_path_contains_file(&repo_path, GIT_SEQUENCER_TODO_FILE)) {
			state = GIT_REPOSITORY_STATE_REVERT_SEQUENCE;
		}
	} else if (git_path_contains_file(&repo_path, GIT_CHERRYPICK_HEAD_FILE)) {
2233
		state = GIT_REPOSITORY_STATE_CHERRYPICK;
2234 2235 2236 2237
		if (git_path_contains_file(&repo_path, GIT_SEQUENCER_TODO_FILE)) {
			state = GIT_REPOSITORY_STATE_CHERRYPICK_SEQUENCE;
		}
	} else if (git_path_contains_file(&repo_path, GIT_BISECT_LOG_FILE))
2238
		state = GIT_REPOSITORY_STATE_BISECT;
Edward Thomson committed
2239 2240 2241 2242

	git_buf_free(&repo_path);
	return state;
}
Ben Straub committed
2243

2244 2245
int git_repository__cleanup_files(
	git_repository *repo, const char *files[], size_t files_len)
2246
{
2247
	git_buf buf = GIT_BUF_INIT;
2248
	size_t i;
2249
	int error;
2250

2251 2252
	for (error = 0, i = 0; !error && i < files_len; ++i) {
		const char *path;
2253

2254 2255
		if (git_buf_joinpath(&buf, repo->path_repository, files[i]) < 0)
			return -1;
2256

2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267
		path = git_buf_cstr(&buf);

		if (git_path_isfile(path)) {
			error = p_unlink(path);
		} else if (git_path_isdir(path)) {
			error = git_futils_rmdir_r(path, NULL,
				GIT_RMDIR_REMOVE_FILES | GIT_RMDIR_REMOVE_BLOCKERS);
		}
			
		git_buf_clear(&buf);
	}
2268

2269
	git_buf_free(&buf);
2270 2271 2272 2273 2274 2275 2276 2277
	return error;
}

static const char *state_files[] = {
	GIT_MERGE_HEAD_FILE,
	GIT_MERGE_MODE_FILE,
	GIT_MERGE_MSG_FILE,
	GIT_REVERT_HEAD_FILE,
2278
	GIT_CHERRYPICK_HEAD_FILE,
2279 2280 2281
	GIT_BISECT_LOG_FILE,
	GIT_REBASE_MERGE_DIR,
	GIT_REBASE_APPLY_DIR,
2282
	GIT_SEQUENCER_DIR,
2283 2284 2285 2286 2287 2288 2289 2290 2291
};

int git_repository_state_cleanup(git_repository *repo)
{
	assert(repo);

	return git_repository__cleanup_files(repo, state_files, ARRAY_SIZE(state_files));
}

Ben Straub committed
2292 2293 2294 2295
int git_repository_is_shallow(git_repository *repo)
{
	git_buf path = GIT_BUF_INIT;
	struct stat st;
Ben Straub committed
2296
	int error;
Ben Straub committed
2297

2298 2299 2300
	if ((error = git_buf_joinpath(&path, repo->path_repository, "shallow")) < 0)
		return error;

Ben Straub committed
2301 2302
	error = git_path_lstat(path.ptr, &st);
	git_buf_free(&path);
Ben Straub committed
2303

2304 2305
	if (error == GIT_ENOTFOUND) {
		giterr_clear();
Ben Straub committed
2306
		return 0;
2307 2308
	}

Ben Straub committed
2309 2310 2311
	if (error < 0)
		return error;
	return st.st_size == 0 ? 0 : 1;
Ben Straub committed
2312
}
2313

2314 2315
int git_repository_init_init_options(
	git_repository_init_options *opts, unsigned int version)
2316
{
2317 2318 2319 2320
	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
		opts, version, git_repository_init_options,
		GIT_REPOSITORY_INIT_OPTIONS_INIT);
	return 0;
2321
}
2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352

int git_repository_ident(const char **name, const char **email, const git_repository *repo)
{
	*name = repo->ident_name;
	*email = repo->ident_email;

	return 0;
}

int git_repository_set_ident(git_repository *repo, const char *name, const char *email)
{
	char *tmp_name = NULL, *tmp_email = NULL;

	if (name) {
		tmp_name = git__strdup(name);
		GITERR_CHECK_ALLOC(tmp_name);
	}

	if (email) {
		tmp_email = git__strdup(email);
		GITERR_CHECK_ALLOC(tmp_email);
	}

	tmp_name = git__swap(repo->ident_name, tmp_name);
	tmp_email = git__swap(repo->ident_email, tmp_email);

	git__free(tmp_name);
	git__free(tmp_email);

	return 0;
}