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https://github.com/git/git
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![Brandon Williams](/assets/img/avatar_default.png)
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
183 lines
4.1 KiB
C
183 lines
4.1 KiB
C
#include "cache.h"
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#include "repository.h"
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#include "config.h"
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/* The main repository */
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static struct repository the_repo;
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struct repository *the_repository = &the_repo;
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static char *git_path_from_env(const char *envvar, const char *git_dir,
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const char *path, int fromenv)
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{
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if (fromenv) {
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const char *value = getenv(envvar);
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if (value)
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return xstrdup(value);
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}
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return xstrfmt("%s/%s", git_dir, path);
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}
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static int find_common_dir(struct strbuf *sb, const char *gitdir, int fromenv)
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{
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if (fromenv) {
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const char *value = getenv(GIT_COMMON_DIR_ENVIRONMENT);
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if (value) {
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strbuf_addstr(sb, value);
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return 1;
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}
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}
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return get_common_dir_noenv(sb, gitdir);
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}
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static void repo_setup_env(struct repository *repo)
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{
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struct strbuf sb = STRBUF_INIT;
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repo->different_commondir = find_common_dir(&sb, repo->gitdir,
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!repo->ignore_env);
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repo->commondir = strbuf_detach(&sb, NULL);
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repo->objectdir = git_path_from_env(DB_ENVIRONMENT, repo->commondir,
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"objects", !repo->ignore_env);
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repo->graft_file = git_path_from_env(GRAFT_ENVIRONMENT, repo->commondir,
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"info/grafts", !repo->ignore_env);
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repo->index_file = git_path_from_env(INDEX_ENVIRONMENT, repo->gitdir,
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"index", !repo->ignore_env);
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}
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void repo_set_gitdir(struct repository *repo, const char *path)
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{
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const char *gitfile = read_gitfile(path);
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/*
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* NEEDSWORK: Eventually we want to be able to free gitdir and the rest
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* of the environment before reinitializing it again, but we have some
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* crazy code paths where we try to set gitdir with the current gitdir
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* and we don't want to free gitdir before copying the passed in value.
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*/
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repo->gitdir = xstrdup(gitfile ? gitfile : path);
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repo_setup_env(repo);
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}
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/*
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* Attempt to resolve and set the provided 'gitdir' for repository 'repo'.
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* Return 0 upon success and a non-zero value upon failure.
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*/
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static int repo_init_gitdir(struct repository *repo, const char *gitdir)
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{
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int ret = 0;
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int error = 0;
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char *abspath = NULL;
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const char *resolved_gitdir;
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abspath = real_pathdup(gitdir, 0);
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if (!abspath) {
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ret = -1;
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goto out;
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}
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/* 'gitdir' must reference the gitdir directly */
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resolved_gitdir = resolve_gitdir_gently(abspath, &error);
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if (!resolved_gitdir) {
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ret = -1;
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goto out;
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}
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repo_set_gitdir(repo, resolved_gitdir);
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out:
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free(abspath);
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return ret;
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}
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void repo_set_worktree(struct repository *repo, const char *path)
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{
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repo->worktree = real_pathdup(path, 1);
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}
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static int read_and_verify_repository_format(struct repository_format *format,
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const char *commondir)
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{
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int ret = 0;
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struct strbuf sb = STRBUF_INIT;
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strbuf_addf(&sb, "%s/config", commondir);
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read_repository_format(format, sb.buf);
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strbuf_reset(&sb);
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if (verify_repository_format(format, &sb) < 0) {
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warning("%s", sb.buf);
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ret = -1;
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}
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strbuf_release(&sb);
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return ret;
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}
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/*
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* Initialize 'repo' based on the provided 'gitdir'.
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* Return 0 upon success and a non-zero value upon failure.
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*/
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int repo_init(struct repository *repo, const char *gitdir, const char *worktree)
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{
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struct repository_format format;
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memset(repo, 0, sizeof(*repo));
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repo->ignore_env = 1;
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if (repo_init_gitdir(repo, gitdir))
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goto error;
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if (read_and_verify_repository_format(&format, repo->commondir))
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goto error;
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if (worktree)
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repo_set_worktree(repo, worktree);
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return 0;
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error:
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repo_clear(repo);
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return -1;
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}
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void repo_clear(struct repository *repo)
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{
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free(repo->gitdir);
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repo->gitdir = NULL;
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free(repo->commondir);
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repo->commondir = NULL;
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free(repo->objectdir);
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repo->objectdir = NULL;
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free(repo->graft_file);
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repo->graft_file = NULL;
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free(repo->index_file);
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repo->index_file = NULL;
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free(repo->worktree);
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repo->worktree = NULL;
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if (repo->config) {
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git_configset_clear(repo->config);
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free(repo->config);
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repo->config = NULL;
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}
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if (repo->index) {
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discard_index(repo->index);
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free(repo->index);
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repo->index = NULL;
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}
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}
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int repo_read_index(struct repository *repo)
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{
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if (!repo->index)
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repo->index = xcalloc(1, sizeof(*repo->index));
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else
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discard_index(repo->index);
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return read_index_from(repo->index, repo->index_file);
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}
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