[PATCH v6 7/9] detached-stash: simplify git stash show

[Jon Seymour <jon.seymour@gmail.com>]

This commit refactors git stash show to make use of the assert_stash_like function.

git show now dies if the presented argument is non-stash-like.

Previous behaviour was to tolerate commits that were not even stash-like.

Previously, git stash show would accept stash-like arguments, but
only if there was a stash on the stack.

Now, git stash accepts stash-like arguments always and only fails
if no stash-like argument is specified and there is no stash stack.

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
---
 git-stash.sh |   14 ++------------
 1 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/git-stash.sh b/git-stash.sh
index ff1edc9..7ce818b 100755
--- a/git-stash.sh
+++ b/git-stash.sh
@@ -210,19 +210,9 @@ list_stash () {
 }
 
 show_stash () {
-	have_stash || die 'No stash found'
-
-	flags=$(git rev-parse --no-revs --flags "$@")
-	if test -z "$flags"
-	then
-		flags=--stat
-	fi
-
-	w_commit=$(git rev-parse --quiet --verify --default $ref_stash "$@") &&
-	b_commit=$(git rev-parse --quiet --verify "$w_commit^") ||
-		die "'$*' is not a stash"
+	assert_stash_like "$@"
 
-	git diff $flags $b_commit $w_commit
+	git diff ${FLAGS:---stat} $b_commit $w_commit
 }
 
 #
-- 
1.7.2.1.110.g34f32