[PATCH 3/3] stash: reject stash name starting with a dash.

[Matthieu Moy <Matthieu.Moy@imag.fr>]

This avoids typos like 'git stash save --invalid-option', particularly
nasty since one can omit the 'save' subcommand. The syntax
'git stash save -- "-name starting with dash" still allows such stash name.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
---
Jeff King <peff@peff.net> writes:

>> But I may have missed its drawbacks ;-)
>
> The only I can think of is that bogus input will provoke 'save'. So
> something like:
>
>   git stash --apply
>
> will invoke "git stash save --apply", which doesn't even complain. It
> just tries to make a stash with message --apply. Now of course this
> input is obviously bogus, but probably the right thing to do is
> complain.
>
> OTOH, I think it is the fault of "git stash save --apply" for not doing
> the complaining, so your patch really isn't making it worse. Probably it
> should barf on anything unrecognized starting with a '-', and allow '--'
> to separate the message from the rest of the options (in the rare case
> that you want a message starting with '-').
>
> -Peff

So, here it is!

 Documentation/git-stash.txt |    2 +-
 git-stash.sh                |   10 +++++++++-
 t/t3903-stash.sh            |   10 ++++++++++
 3 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-stash.txt b/Documentation/git-stash.txt
index 7e515ce..ded62e0 100644
--- a/Documentation/git-stash.txt
+++ b/Documentation/git-stash.txt
@@ -13,7 +13,7 @@ SYNOPSIS
 'git stash' drop [-q|--quiet] [<stash>]
 'git stash' ( pop | apply ) [--index] [-q|--quiet] [<stash>]
 'git stash' branch <branchname> [<stash>]
-'git stash' [save] [--patch] [--[no-]keep-index|-k] [-q|--quiet] [<message>]
+'git stash' [save] [--patch] [--[no-]keep-index|-k] [-q|--quiet] [--] [<message>]
 'git stash' clear
 'git stash' create
 
diff --git a/git-stash.sh b/git-stash.sh
index bb36bc7..642e265 100755
--- a/git-stash.sh
+++ b/git-stash.sh
@@ -7,7 +7,7 @@ USAGE="list [<options>]
    or: $dashless drop [-q|--quiet] [<stash>]
    or: $dashless ( pop | apply ) [--index] [-q|--quiet] [<stash>]
    or: $dashless branch <branchname> [<stash>]
-   or: $dashless [save] [-k|--keep-index] [-q|--quiet] [<message>]
+   or: $dashless [save] [-k|--keep-index] [-q|--quiet] [--] [<message>]
    or: $dashless clear"
 
 SUBDIRECTORY_OK=Yes
@@ -145,6 +145,14 @@ save_stash () {
 		-q|--quiet)
 			GIT_QUIET=t
 			;;
+		--)
+			shift
+			break
+			;;
+		-*)
+			echo "error: unknown option for 'stash save': $1"
+			usage
+			;;
 		*)
 			break
 			;;
diff --git a/t/t3903-stash.sh b/t/t3903-stash.sh
index 0e831e0..87e5a14 100755
--- a/t/t3903-stash.sh
+++ b/t/t3903-stash.sh
@@ -208,4 +208,14 @@ test_expect_success 'stash -k' '
        test bar,bar4 = $(cat file),$(cat file2)
 '
 
+test_expect_success 'stash --invalid-option' '
+       echo bar5 > file &&
+       echo bar6 > file2 &&
+       git add file2 &&
+       ! git stash --invalid-option &&
+       test bar5,bar6 = $(cat file),$(cat file2) &&
+       git stash -- -message-starting-with-dash &&
+       test bar,bar2 = $(cat file),$(cat file2)
+'
+
 test_done
-- 
1.6.4.rc2.31.g2d7d7