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![Brandon Williams](/assets/img/avatar_default.png)
Teach the config machinery to read config information from a repository object. This involves storing a 'struct config_set' inside the repository object and adding a number of functions (repo_config*) to be able to query a repository's config. The current config API enables lazy-loading of the config. This means that when 'git_config_get_int()' is called, if the_config_set hasn't been populated yet, then it will be populated and properly initialized by reading the necessary config files (system wide .gitconfig, user's home .gitconfig, and the repository's config). To maintain this paradigm, the new API to read from a repository object's config will also perform this lazy-initialization. Since both APIs (git_config_get* and repo_config_get*) have the same semantics we can migrate the default config to be stored within 'the_repository' and just have the 'git_config_get*' family of functions redirect to the 'repo_config_get*' functions. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
167 lines
3.8 KiB
C
167 lines
3.8 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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}
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