On 7/17/2014 3:31 PM, Matthieu Moy wrote:
> Tanay Abhra <tanay...@gmail.com> writes:
> 
>> I have a question about renaming git_config() to git_config_raw().
>> I was working on a patch and I am getting stuck here.
>> It fails in t1001, t1020 & t4018. The reason for the last test failure
>> is unknown right now. For the first two, it boils down to this,
>>
>>              git init --bare bare-ancestor-aliased.git &&
>>              cd bare-ancestor-aliased.git &&
>>              echo "[alias] aliasedinit = init" >>config &&
>>              mkdir plain-nested &&
>>              cd plain-nested &&
>>              git aliasedinit
> 
> Git tries to read .git/config relative to the current directory, and
> tries to resolve aliases from it. The problem is: if one tries to do
> this from a subdirectory inside the repo, .git/config is not the right
> path, and the alias lookup fails.
> 
> I'll investigate more later.
>

Hmn, this does the trick,
-- 8< --
diff --git a/cache.h b/cache.h
index c67639d..66b52f1 100644
--- a/cache.h
+++ b/cache.h
@@ -1272,6 +1272,7 @@ extern int git_config_from_buf(config_fn_t fn, const char 
*name,
                               const char *buf, size_t len, void *data);
 extern void git_config_push_parameter(const char *text);
 extern int git_config_from_parameters(config_fn_t fn, void *data);
+extern int git_config_raw(config_fn_t fn, void *);
 extern int git_config(config_fn_t fn, void *);
 extern int git_config_with_options(config_fn_t fn, void *,
                                   struct git_config_source *config_source,
diff --git a/config.c b/config.c
index d14f761..9e3f99a 100644
--- a/config.c
+++ b/config.c
@@ -1222,11 +1222,36 @@ int git_config_with_options(config_fn_t fn, void *data,
        return ret;
 }

-int git_config(config_fn_t fn, void *data)
+extern int git_config_raw(config_fn_t fn, void *data)
 {
        return git_config_with_options(fn, data, NULL, 1);
 }

+int git_configset_iter(struct config_set *cs, config_fn_t fn, void *data)
+{
+       int i;
+       struct string_list *strptr;
+       struct config_set_element *entry;
+       struct hashmap_iter iter;
+       hashmap_iter_init(&cs->config_hash, &iter);
+       while ((entry = hashmap_iter_next(&iter))) {
+               strptr = &entry->value_list;
+               for (i = 0; i < strptr->nr; i++) {
+                       if (fn(entry->key, strptr->items[i].string, data) < 0)
+                               die("bad config file");
+               }
+       }
+       return 0;
+}
+
+static void git_config_check_init(void);
+
+int git_config(config_fn_t fn, void *data)
+{
+       git_config_check_init();
+       return git_configset_iter(&the_config_set, fn, data);
+}
+
 static struct config_set_element *configset_find_element(struct config_set 
*cs, const char *key)
 {
        struct config_set_element k;
@@ -1409,7 +1434,7 @@ static void git_config_check_init(void)
        if (the_config_set.hash_initialized)
                return;
        git_configset_init(&the_config_set);
-       git_config(config_hash_callback, &the_config_set);
+       git_config_raw(config_hash_callback, &the_config_set);
 }

 void git_config_clear(void)
diff --git a/pager.c b/pager.c
index 8b5cbc5..b4237e6 100644
--- a/pager.c
+++ b/pager.c
@@ -177,7 +177,7 @@ int check_pager_config(const char *cmd)
        c.cmd = cmd;
        c.want = -1;
        c.value = NULL;
-       git_config(pager_command_config, &c);
+       git_config_raw(pager_command_config, &c);
        if (c.value)
                pager_program = c.value;
        return c.want;
-- 8< --

The offending part is in git.c, line number 540:

static void execv_dashed_external(const char **argv)
{
        struct strbuf cmd = STRBUF_INIT;
        const char *tmp;
        int status;

        if (use_pager == -1)
                use_pager = check_pager_config(argv[0]);
----------------------------^^^^^^^^^^^^^^^^^^^^^^^^^^^
        commit_pager_choice();


which cause git_config() to be called before handle_alias
can call it in git.c line no 587,

static int run_argv(int *argcp, const char ***argv)
{
        int done_alias = 0;

        while (1) {
                /* See if it's a builtin */
                handle_builtin(*argcp, *argv);

                /* .. then try the external ones */
                execv_dashed_external(*argv);
/* calls git_config() first, skips the .git/config file*/
                /* It could be an alias -- this works around the insanity
                 * of overriding "git log" with "git show" by having
                 * alias.log = show
                 */
                if (done_alias)
                        break;
                save_env();
                if (!handle_alias(argcp, argv))
/* does setup_git_directory_gently() before calling git_config() */
                        break;
                done_alias = 1;
        }

        return done_alias;
}

I am searching for a more elegant solution to this problem.
Thanks,
Tanay Abhra.
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