[PATCHv5 2/5] rev-parse: --local-env-vars option

[Giuseppe Bilotta <giuseppe.bilotta@gmail.com>]

This prints the list of repo-local environment variables.

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
---
 Documentation/git-rev-parse.txt |    6 ++++++
 builtin-rev-parse.c             |    8 ++++++++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index 1a613aa..8db600f 100644
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -148,6 +148,12 @@ shown.  If the pattern does not contain a globbing character (`?`,
 --is-bare-repository::
 	When the repository is bare print "true", otherwise "false".
 
+--local-env-vars::
+	List the GIT_* environment variables that are local to the
+	repository (e.g. GIT_DIR or GIT_WORK_TREE, but not GIT_EDITOR).
+	Only the names of the variables are listed, not their value,
+	even if they are set.
+
 --short::
 --short=number::
 	Instead of outputting the full SHA1 values of object names try to
diff --git a/builtin-rev-parse.c b/builtin-rev-parse.c
index a8c5043..ab7b520 100644
--- a/builtin-rev-parse.c
+++ b/builtin-rev-parse.c
@@ -455,7 +455,15 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 	if (argc > 1 && !strcmp("--sq-quote", argv[1]))
 		return cmd_sq_quote(argc - 2, argv + 2);
 
+	if (argc > 0 && !strcmp("--local-env-vars", argv[1])) {
+		unsigned int i = 0;
+		const char *var;
+		while (var = local_repo_env[i++])
+			printf("%s\n", var);
+		return 0;
+	}
 	if (argc > 1 && !strcmp("-h", argv[1]))
+
 		usage(builtin_rev_parse_usage);
 
 	prefix = setup_git_directory();
-- 
1.7.0.212.g5b851b.dirty