config.c: remove current_parsing_scope

Add ".parsing_scope" to "struct config_reader" and replace
"current_parsing_scope" with "the_reader.parsing_scope. Adjust the
comment slightly to make it clearer that the scope applies to the config
source (not the current value), and should only be set when parsing a
config source.

As such, ".parsing_scope" (only set when parsing config sources) and
".config_kvi" (only set when iterating a config set) should not be
set together, so enforce this with a setter function.

Unlike previous commits, "populate_remote_urls()" still needs to store
and restore the 'scope' value because it could have touched
"current_parsing_scope" ("config_with_options()" can set the scope).

Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/config.c b/config.c
index 71ee36f069b263e6791ed4e5f9c6f0d91a9927bf..3756322ec966f23b784e08601928f80ec0027051 100644 (file)
--- a/config.c
+++ b/config.c
@@ -70,6 +70,16 @@ struct config_reader {
         */
        struct config_source *source;
        struct key_value_info *config_kvi;
+       /*
+        * The "scope" of the current config source being parsed (repo, global,
+        * etc). Like "source", this is only set when parsing a config source.
+        * It's not part of "source" because it transcends a single file (i.e.,
+        * a file included from .git/config is still in "repo" scope).
+        *
+        * When iterating through a configset, the equivalent value is
+        * "config_kvi.scope" (see above).
+        */
+       enum config_scope parsing_scope;
 };
 /*
  * Where possible, prefer to accept "struct config_reader" as an arg than to use
@@ -78,16 +88,6 @@ struct config_reader {
  */
 static struct config_reader the_reader;
 
-/*
- * Similar to the variables above, this gives access to the "scope" of the
- * current value (repo, global, etc). For cached values, it can be found via
- * the current_config_kvi as above. During parsing, the current value can be
- * found in this variable. It's not part of "cf_global" because it transcends a
- * single file (i.e., a file included from .git/config is still in "repo"
- * scope).
- */
-static enum config_scope current_parsing_scope;
-
 static inline void config_reader_push_source(struct config_reader *reader,
                                             struct config_source *top)
 {
@@ -110,11 +110,19 @@ static inline struct config_source *config_reader_pop_source(struct config_reade
 static inline void config_reader_set_kvi(struct config_reader *reader,
                                         struct key_value_info *kvi)
 {
-       if (kvi && reader->source)
+       if (kvi && (reader->source || reader->parsing_scope))
                BUG("kvi should not be set while parsing a config source");
        reader->config_kvi = kvi;
 }
 
+static inline void config_reader_set_scope(struct config_reader *reader,
+                                          enum config_scope scope)
+{
+       if (scope && reader->config_kvi)
+               BUG("scope should only be set when iterating through a config source");
+       reader->parsing_scope = scope;
+}
+
 static int pack_compression_seen;
 static int zlib_compression_seen;
 
@@ -383,18 +391,18 @@ static void populate_remote_urls(struct config_include_data *inc)
 {
        struct config_options opts;
 
-       enum config_scope store_scope = current_parsing_scope;
+       enum config_scope store_scope = inc->config_reader->parsing_scope;
 
        opts = *inc->opts;
        opts.unconditional_remote_url = 1;
 
-       current_parsing_scope = 0;
+       config_reader_set_scope(inc->config_reader, 0);
 
        inc->remote_urls = xmalloc(sizeof(*inc->remote_urls));
        string_list_init_dup(inc->remote_urls);
        config_with_options(add_remote_url, inc->remote_urls, inc->config_source, &opts);
 
-       current_parsing_scope = store_scope;
+       config_reader_set_scope(inc->config_reader, store_scope);
 }
 
 static int forbid_remote_url(const char *var, const char *value UNUSED,
@@ -2159,7 +2167,8 @@ int git_config_system(void)
        return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
 }
 
-static int do_git_config_sequence(const struct config_options *opts,
+static int do_git_config_sequence(struct config_reader *reader,
+                                 const struct config_options *opts,
                                  config_fn_t fn, void *data)
 {
        int ret = 0;
@@ -2167,7 +2176,7 @@ static int do_git_config_sequence(const struct config_options *opts,
        char *xdg_config = NULL;
        char *user_config = NULL;
        char *repo_config;
-       enum config_scope prev_parsing_scope = current_parsing_scope;
+       enum config_scope prev_parsing_scope = reader->parsing_scope;
 
        if (opts->commondir)
                repo_config = mkpathdup("%s/config", opts->commondir);
@@ -2176,13 +2185,13 @@ static int do_git_config_sequence(const struct config_options *opts,
        else
                repo_config = NULL;
 
-       current_parsing_scope = CONFIG_SCOPE_SYSTEM;
+       config_reader_set_scope(reader, CONFIG_SCOPE_SYSTEM);
        if (git_config_system() && system_config &&
            !access_or_die(system_config, R_OK,
                           opts->system_gently ? ACCESS_EACCES_OK : 0))
                ret += git_config_from_file(fn, system_config, data);
 
-       current_parsing_scope = CONFIG_SCOPE_GLOBAL;
+       config_reader_set_scope(reader, CONFIG_SCOPE_GLOBAL);
        git_global_config(&user_config, &xdg_config);
 
        if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
@@ -2191,12 +2200,12 @@ static int do_git_config_sequence(const struct config_options *opts,
        if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
                ret += git_config_from_file(fn, user_config, data);
 
-       current_parsing_scope = CONFIG_SCOPE_LOCAL;
+       config_reader_set_scope(reader, CONFIG_SCOPE_LOCAL);
        if (!opts->ignore_repo && repo_config &&
            !access_or_die(repo_config, R_OK, 0))
                ret += git_config_from_file(fn, repo_config, data);
 
-       current_parsing_scope = CONFIG_SCOPE_WORKTREE;
+       config_reader_set_scope(reader, CONFIG_SCOPE_WORKTREE);
        if (!opts->ignore_worktree && repository_format_worktree_config) {
                char *path = git_pathdup("config.worktree");
                if (!access_or_die(path, R_OK, 0))
@@ -2204,11 +2213,11 @@ static int do_git_config_sequence(const struct config_options *opts,
                free(path);
        }
 
-       current_parsing_scope = CONFIG_SCOPE_COMMAND;
+       config_reader_set_scope(reader, CONFIG_SCOPE_COMMAND);
        if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
                die(_("unable to parse command-line config"));
 
-       current_parsing_scope = prev_parsing_scope;
+       config_reader_set_scope(reader, prev_parsing_scope);
        free(system_config);
        free(xdg_config);
        free(user_config);
@@ -2221,6 +2230,7 @@ int config_with_options(config_fn_t fn, void *data,
                        const struct config_options *opts)
 {
        struct config_include_data inc = CONFIG_INCLUDE_INIT;
+       enum config_scope prev_scope = the_reader.parsing_scope;
        int ret;
 
        if (opts->respect_includes) {
@@ -2234,7 +2244,7 @@ int config_with_options(config_fn_t fn, void *data,
        }
 
        if (config_source)
-               current_parsing_scope = config_source->scope;
+               config_reader_set_scope(&the_reader, config_source->scope);
 
        /*
         * If we have a specific filename, use it. Otherwise, follow the
@@ -2250,13 +2260,14 @@ int config_with_options(config_fn_t fn, void *data,
                ret = git_config_from_blob_ref(fn, repo, config_source->blob,
                                                data);
        } else {
-               ret = do_git_config_sequence(opts, fn, data);
+               ret = do_git_config_sequence(&the_reader, opts, fn, data);
        }
 
        if (inc.remote_urls) {
                string_list_clear(inc.remote_urls, 0);
                FREE_AND_NULL(inc.remote_urls);
        }
+       config_reader_set_scope(&the_reader, prev_scope);
        return ret;
 }
 
@@ -2390,7 +2401,7 @@ static int configset_add_value(struct config_reader *reader,
                kv_info->linenr = -1;
                kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
        }
-       kv_info->scope = current_parsing_scope;
+       kv_info->scope = reader->parsing_scope;
        si->util = kv_info;
 
        return 0;
@@ -3891,7 +3902,7 @@ enum config_scope current_config_scope(void)
        if (the_reader.config_kvi)
                return the_reader.config_kvi->scope;
        else
-               return current_parsing_scope;
+               return the_reader.parsing_scope;
 }
 
 int current_config_line(void)