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![Nguyễn Thái Ngọc Duy](/assets/img/avatar_default.png)
It does not make sense that generic repository code contains handling of environment variables, which are specific for the main repository only. Refactor repo_set_gitdir() function to take $GIT_DIR and optionally _all_ other customizable paths. These optional paths can be NULL and will be calculated according to the default directory layout. Note that some dead functions are left behind to reduce diff noise. They will be deleted in the next patch. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
271 lines
6.1 KiB
C
271 lines
6.1 KiB
C
#include "cache.h"
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#include "repository.h"
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#include "config.h"
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#include "submodule-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;
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void initialize_the_repository(void)
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{
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the_repository = &the_repo;
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the_repo.index = &the_index;
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repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
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}
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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 expand_base_dir(char **out, const char *in,
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const char *base_dir, const char *def_in)
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{
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free(*out);
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if (in)
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*out = xstrdup(in);
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else
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*out = xstrfmt("%s/%s", base_dir, def_in);
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}
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static void repo_set_commondir(struct repository *repo,
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const char *commondir)
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{
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struct strbuf sb = STRBUF_INIT;
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free(repo->commondir);
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if (commondir) {
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repo->different_commondir = 1;
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repo->commondir = xstrdup(commondir);
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return;
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}
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repo->different_commondir = get_common_dir_noenv(&sb, repo->gitdir);
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repo->commondir = strbuf_detach(&sb, NULL);
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}
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void repo_set_gitdir(struct repository *repo,
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const char *root,
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const struct set_gitdir_args *o)
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{
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const char *gitfile = read_gitfile(root);
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/*
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* repo->gitdir is saved because the caller could pass "root"
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* that also points to repo->gitdir. We want to keep it alive
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* until after xstrdup(root). Then we can free it.
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*/
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char *old_gitdir = repo->gitdir;
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repo->gitdir = xstrdup(gitfile ? gitfile : root);
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free(old_gitdir);
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repo_set_commondir(repo, o->commondir);
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expand_base_dir(&repo->objectdir, o->object_dir,
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repo->commondir, "objects");
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expand_base_dir(&repo->graft_file, o->graft_file,
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repo->commondir, "info/grafts");
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expand_base_dir(&repo->index_file, o->index_file,
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repo->gitdir, "index");
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}
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void repo_set_hash_algo(struct repository *repo, int hash_algo)
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{
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repo->hash_algo = &hash_algos[hash_algo];
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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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struct set_gitdir_args args = { NULL };
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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, &args);
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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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static int repo_init(struct repository *repo,
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const char *gitdir,
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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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repo_set_hash_algo(repo, format.hash_algo);
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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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/*
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* Initialize 'submodule' as the submodule given by 'path' in parent repository
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* 'superproject'.
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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_submodule_init(struct repository *submodule,
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struct repository *superproject,
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const char *path)
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{
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const struct submodule *sub;
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struct strbuf gitdir = STRBUF_INIT;
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struct strbuf worktree = STRBUF_INIT;
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int ret = 0;
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sub = submodule_from_cache(superproject, &null_oid, path);
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if (!sub) {
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ret = -1;
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goto out;
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}
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strbuf_repo_worktree_path(&gitdir, superproject, "%s/.git", path);
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strbuf_repo_worktree_path(&worktree, superproject, "%s", path);
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if (repo_init(submodule, gitdir.buf, worktree.buf)) {
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/*
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* If initilization fails then it may be due to the submodule
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* not being populated in the superproject's worktree. Instead
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* we can try to initilize the submodule by finding it's gitdir
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* in the superproject's 'modules' directory. In this case the
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* submodule would not have a worktree.
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*/
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strbuf_reset(&gitdir);
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strbuf_repo_git_path(&gitdir, superproject,
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"modules/%s", sub->name);
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if (repo_init(submodule, gitdir.buf, NULL)) {
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ret = -1;
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goto out;
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}
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}
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submodule->submodule_prefix = xstrfmt("%s%s/",
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superproject->submodule_prefix ?
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superproject->submodule_prefix :
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"", path);
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out:
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strbuf_release(&gitdir);
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strbuf_release(&worktree);
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return ret;
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}
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void repo_clear(struct repository *repo)
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{
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FREE_AND_NULL(repo->gitdir);
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FREE_AND_NULL(repo->commondir);
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FREE_AND_NULL(repo->objectdir);
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FREE_AND_NULL(repo->graft_file);
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FREE_AND_NULL(repo->index_file);
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FREE_AND_NULL(repo->worktree);
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FREE_AND_NULL(repo->submodule_prefix);
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if (repo->config) {
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git_configset_clear(repo->config);
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FREE_AND_NULL(repo->config);
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}
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if (repo->submodule_cache) {
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submodule_cache_free(repo->submodule_cache);
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repo->submodule_cache = 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_AND_NULL(repo->index);
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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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return read_index_from(repo->index, repo->index_file, repo->gitdir);
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}
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