packfile: refactor hash search with fanout table

diff --git a/repository.c b/repository.c
index edca9074046ab1ca9826d2479bcca11018ba1873..bb2fae5446b7ea8d2bfac87faa30c165f714d121 100644 (file)
--- a/repository.c
+++ b/repository.c
@@ -4,7 +4,9 @@
 #include "submodule-config.h"
 
 /* The main repository */
-static struct repository the_repo;
+static struct repository the_repo = {
+       NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &the_index, 0, 0
+};
 struct repository *the_repository = &the_repo;
 
 static char *git_path_from_env(const char *envvar, const char *git_dir,
@@ -38,11 +40,15 @@ static void repo_setup_env(struct repository *repo)
 
        repo->different_commondir = find_common_dir(&sb, repo->gitdir,
                                                    !repo->ignore_env);
+       free(repo->commondir);
        repo->commondir = strbuf_detach(&sb, NULL);
+       free(repo->objectdir);
        repo->objectdir = git_path_from_env(DB_ENVIRONMENT, repo->commondir,
                                            "objects", !repo->ignore_env);
+       free(repo->graft_file);
        repo->graft_file = git_path_from_env(GRAFT_ENVIRONMENT, repo->commondir,
                                             "info/grafts", !repo->ignore_env);
+       free(repo->index_file);
        repo->index_file = git_path_from_env(INDEX_ENVIRONMENT, repo->gitdir,
                                             "index", !repo->ignore_env);
 }
@@ -50,16 +56,12 @@ static void repo_setup_env(struct repository *repo)
 void repo_set_gitdir(struct repository *repo, const char *path)
 {
        const char *gitfile = read_gitfile(path);
+       char *old_gitdir = repo->gitdir;
 
-       /*
-        * NEEDSWORK: Eventually we want to be able to free gitdir and the rest
-        * of the environment before reinitializing it again, but we have some
-        * crazy code paths where we try to set gitdir with the current gitdir
-        * and we don't want to free gitdir before copying the passed in value.
-        */
        repo->gitdir = xstrdup(gitfile ? gitfile : path);
-
        repo_setup_env(repo);
+
+       free(old_gitdir);
 }
 
 /*
@@ -158,7 +160,7 @@ int repo_submodule_init(struct repository *submodule,
        struct strbuf worktree = STRBUF_INIT;
        int ret = 0;
 
-       sub = submodule_from_cache(superproject, null_sha1, path);
+       sub = submodule_from_cache(superproject, &null_oid, path);
        if (!sub) {
                ret = -1;
                goto out;
@@ -198,25 +200,17 @@ int repo_submodule_init(struct repository *submodule,
 
 void repo_clear(struct repository *repo)
 {
-       free(repo->gitdir);
-       repo->gitdir = NULL;
-       free(repo->commondir);
-       repo->commondir = NULL;
-       free(repo->objectdir);
-       repo->objectdir = NULL;
-       free(repo->graft_file);
-       repo->graft_file = NULL;
-       free(repo->index_file);
-       repo->index_file = NULL;
-       free(repo->worktree);
-       repo->worktree = NULL;
-       free(repo->submodule_prefix);
-       repo->submodule_prefix = NULL;
+       FREE_AND_NULL(repo->gitdir);
+       FREE_AND_NULL(repo->commondir);
+       FREE_AND_NULL(repo->objectdir);
+       FREE_AND_NULL(repo->graft_file);
+       FREE_AND_NULL(repo->index_file);
+       FREE_AND_NULL(repo->worktree);
+       FREE_AND_NULL(repo->submodule_prefix);
 
        if (repo->config) {
                git_configset_clear(repo->config);
-               free(repo->config);
-               repo->config = NULL;
+               FREE_AND_NULL(repo->config);
        }
 
        if (repo->submodule_cache) {
@@ -226,8 +220,7 @@ void repo_clear(struct repository *repo)
 
        if (repo->index) {
                discard_index(repo->index);
-               free(repo->index);
-               repo->index = NULL;
+               FREE_AND_NULL(repo->index);
        }
 }
 
@@ -235,8 +228,6 @@ int repo_read_index(struct repository *repo)
 {
        if (!repo->index)
                repo->index = xcalloc(1, sizeof(*repo->index));
-       else
-               discard_index(repo->index);
 
        return read_index_from(repo->index, repo->index_file);
 }