[PATCH/RFC 3/7] Mark builtins that create .git/ directories

[Johannes Schindelin <johannes.schindelin@gmx.de>]

To refactor read_early_config() so that it discovers .git/config
properly, we have to make certain that commands such as `git init` (i.e.
commands that create their own .git/ and therefore do *not* want to
be affected by any other .git/ directory) skip this discovery.

Let's introduce a flag that states for every builtin whether it creates
its own .git/ directory or not.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 git.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/git.c b/git.c
index dce529fcbf..61df78afc8 100644
--- a/git.c
+++ b/git.c
@@ -318,12 +318,13 @@ static int handle_alias(int *argcp, const char ***argv)
 #define RUN_SETUP		(1<<0)
 #define RUN_SETUP_GENTLY	(1<<1)
 #define USE_PAGER		(1<<2)
+#define CREATES_GIT_DIR         (1<<3)
 /*
  * require working tree to be present -- anything uses this needs
  * RUN_SETUP for reading from the configuration file.
  */
-#define NEED_WORK_TREE		(1<<3)
-#define SUPPORT_SUPER_PREFIX	(1<<4)
+#define NEED_WORK_TREE		(1<<4)
+#define SUPPORT_SUPER_PREFIX	(1<<5)
 
 struct cmd_struct {
 	const char *cmd;
@@ -412,7 +413,7 @@ static struct cmd_struct commands[] = {
 	{ "cherry", cmd_cherry, RUN_SETUP },
 	{ "cherry-pick", cmd_cherry_pick, RUN_SETUP | NEED_WORK_TREE },
 	{ "clean", cmd_clean, RUN_SETUP | NEED_WORK_TREE },
-	{ "clone", cmd_clone },
+	{ "clone", cmd_clone, CREATES_GIT_DIR },
 	{ "column", cmd_column, RUN_SETUP_GENTLY },
 	{ "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
 	{ "commit-tree", cmd_commit_tree, RUN_SETUP },
@@ -438,7 +439,7 @@ static struct cmd_struct commands[] = {
 	{ "hash-object", cmd_hash_object },
 	{ "help", cmd_help },
 	{ "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
-	{ "init", cmd_init_db },
+	{ "init", cmd_init_db, CREATES_GIT_DIR },
 	{ "init-db", cmd_init_db },
 	{ "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
 	{ "log", cmd_log, RUN_SETUP },
-- 
2.11.0.rc3.windows.1