--check option to see if a repo exists and can be decrypted

This is to allow programs to determine if a repo uses gcrypt, per #6.

Since this program already knows the name of the manifest file and how to
download it and decrypt it, it makes sense to do the check here rather than
in, eg, git-annex.

1 files changed, 25 insertions, 8 deletions

diff --git a/git-remote-gcrypt b/git-remote-gcrypt
index bf75777..67b0f67 100755
--- a/git-remote-gcrypt
+++ b/git-remote-gcrypt
@@ -779,14 +779,8 @@ cleanup_tmpfiles()
 	rm -r -f -- "${Tempdir}" >&2
 }
 
-# handle git-remote-helpers protocol
-gcrypt_main_loop()
+setup()
 {
-	local input_= input_inner= r_args= temp_key=
-
-	NAME=$1  # Remote name
-	URL=$2   # Remote URL
-
 	mkdir -p "$Localdir"
 
 	# Set up a subdirectory in /tmp
@@ -798,6 +792,17 @@ gcrypt_main_loop()
 	trap 'exit 1' 1 2 3 15
 
 	echo_info "Development version -- Repository format MAY CHANGE"
+}
+
+# handle git-remote-helpers protocol
+gcrypt_main_loop()
+{
+	local input_= input_inner= r_args= temp_key=
+
+	NAME=$1  # Remote name
+	URL=$2   # Remote URL
+
+	setup
 
 	while read input_
 	do
@@ -849,4 +854,16 @@ gcrypt_main_loop()
 	done
 }
 
-gcrypt_main_loop "$@"
+if [ "x$1" = x--check ]
+then
+	NAME=dummy-gcrypt-check
+	URL=$2
+	setup
+	ensure_connected
+	if iseq "$Did_find_repo" "no"
+	then
+		exit 100
+	fi
+else
+	gcrypt_main_loop "$@"
+fi