[RFC/PATCH] git: add --no-replace option to disable replacing

[Christian Couder <chriscool@tuxfamily.org>]

Commit dae556b (environment: add global variable to disable replacement)
adds a variable to enable/disable replacement, and it is enabled by
default for most commands.

So there is no way to disable it for some commands, which is annoying
when we want to get information about a commit that has been replaced.

For example:

$ git cat-file -p N

would output information about the replacement commit if commit N is
replaced.

With the "--no-replace" option that this patch adds it is possible to
get information about the original commit using:

$ git --no-replace cat-file -p N

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
---
 git.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

	Jakub Narebski wrote:

	> Wouldn't it be better for this option to be option for git
	> wrapper, i.e.
	>
	>  $ git --no-replace cat-file -p N
	>
	> and not
	>
	>  $ git cat-file --no-replace -p N

	You mean something like this patch?

	This is untested yet. I will add some tests and documentation
	later if it's ok to add this option.


diff --git a/git.c b/git.c
index 9883009..cfef7ac 100644
--- a/git.c
+++ b/git.c
@@ -6,7 +6,7 @@
 
 const char git_usage_string[] =
 	"git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n"
-	"           [-p|--paginate|--no-pager]\n"
+	"           [-p|--paginate|--no-pager] [--no-replace]\n"
 	"           [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n"
 	"           [--help] COMMAND [ARGS]";
 
@@ -87,6 +87,8 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
 			use_pager = 0;
 			if (envchanged)
 				*envchanged = 1;
+		} else if (!strcmp(cmd, "--no-replace")) {
+			read_replace_refs = 0;
 		} else if (!strcmp(cmd, "--git-dir")) {
 			if (*argc < 2) {
 				fprintf(stderr, "No directory given for --git-dir.\n" );
-- 
1.6.5.1.g31b53