applications and for being read by end users, it requires at least two
formats: one for being read by humans and other for being read by
machines. Some other Git commands also have two output formats, notably
git-config which was the inspiration for the two formats that were
chosen here:

- keyvalue, where the retrieved data is printed one per line, using =
  for delimiting the key and the value. This is the default format,
  targeted for end users.
- null, where the retrieved data is separated by null characters, using
  the newline character for delimiting the key and the value. This
  format is targeted for being read by machines.

Helped-by: Phillip Wood [off-list ref]
Helped-by: Junio C Hamano [off-list ref]
Helped-by: Justin Tobler [off-list ref]
Mentored-by: Karthik Nayak [off-list ref]
Mentored-by: Patrick Steinhardt [off-list ref]
Signed-off-by: Lucas Seiki Oshiro <redacted>
---
 Documentation/git-repo.adoc | 13 +++++++++-
 builtin/repo.c              | 49 ++++++++++++++++++++++++++++++++++---
 t/t1900-repo.sh             | 13 ++++++++--
 3 files changed, 68 insertions(+), 7 deletions(-)

diff --git a/Documentation/git-repo.adoc b/Documentation/git-repo.adoc
index 375b956d3f..5bdc3831a7 100644
--- a/Documentation/git-repo.adoc
+++ b/Documentation/git-repo.adoc

@@ -18,10 +18,21 @@ THIS COMMAND IS EXPERIMENTAL. THE BEHAVIOR MAY CHANGE.

 COMMANDS
 --------
-info [<key>...]::
+info [--format=<format>] [<key>...]::
 	Retrieve metadata-related information about the current repository. Only
 	the requested data will be returned based on their keys (see "INFO KEYS"
 	section below).
++
+The output format can be chosen through the flag `--format`. Two formats are
+supported:
++

 int cmd_repo(int argc, const char **argv, const char *prefix,

diff --git a/t/t1900-repo.sh b/t/t1900-repo.sh
index c46ace1fd3..fdd3491429 100755
--- a/t/t1900-repo.sh
+++ b/t/t1900-repo.sh

@@ -20,11 +20,20 @@ test_repo_info () {
 	key=$3
 	expected_value=$4

-	test_expect_success "$label" '
+	test_expect_success "null-terminated: $label" '
+		test_when_finished "rm -rf repo" &&
+		eval "$init_command" &&
+		echo "$expected_value" | lf_to_nul >expected &&
+		git -C repo repo info --format=null "$key" >output &&
+		tail -n 1 output >actual &&
+		test_cmp expected actual
+	'
+
+	test_expect_success "key-value: $label" '
 		test_when_finished "rm -rf repo" &&
 		eval "$init_command" &&
 		echo "$expected_value" >expected &&
-		git -C repo repo info "$key" >output &&
+		git -C repo repo info --format=keyvalue "$key" >output &&
 		cut -d "=" -f 2 <output >actual &&
 		test_cmp expected actual
 	'