[PATCH] contrib/subtree: added --no-show-signature to git log invocation

[Kieran Colford <kieran@kcolford.com>]

When having log.showSignature enabled by default (as is good practice
with signed commits), it still shows the signature when git-subtree
passes custom format specifiers to git-log.  This causes an error when
trying to push a subtree when signed commits are involved.

Adding this command line flag fixes the above bug.  The command line
flag was added to all invocations of git-log so that it would behave
as expected by the original developers.

The flag could be more judiciously applied, but that requires a deeper
understanding of the code.  It may be more desirable to disable
--show-signature when any custom format specifier is given, but that
change has far more wide reaching consequences, as well as a change to
the documentation.

Signed-off-by: Kieran Colford <kieran@kcolford.com>
---
 contrib/subtree/git-subtree.sh | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index dec085a..d9e89d1 100755
--- a/contrib/subtree/git-subtree.sh
+++ b/contrib/subtree/git-subtree.sh
@@ -296,7 +296,7 @@ find_latest_squash () {
 	sq=
 	main=
 	sub=
-	git log --grep="^git-subtree-dir: $dir/*\$" \
+	git log --no-show-signature --grep="^git-subtree-dir: $dir/*\$" \
 		--pretty=format:'START %H%n%s%n%n%b%nEND%n' HEAD |
 	while read a b junk
 	do
@@ -340,7 +340,7 @@ find_existing_splits () {
 	revs="$2"
 	main=
 	sub=
-	git log --grep="^git-subtree-dir: $dir/*\$" \
+	git log --no-show-signature --grep="^git-subtree-dir: $dir/*\$" \
 		--pretty=format:'START %H%n%s%n%n%b%nEND%n' $revs |
 	while read a b junk
 	do
@@ -382,7 +382,7 @@ copy_commit () {
 	# We're going to set some environment vars here, so
 	# do it in a subshell to get rid of them safely later
 	debug copy_commit "{$1}" "{$2}" "{$3}"
-	git log -1 --pretty=format:'%an%n%ae%n%aD%n%cn%n%ce%n%cD%n%B' "$1" |
+	git log --no-show-signature -1 --pretty=format:'%an%n%ae%n%aD%n%cn%n%ce%n%cD%n%B' "$1" |
 	(
 		read GIT_AUTHOR_NAME
 		read GIT_AUTHOR_EMAIL
@@ -462,8 +462,8 @@ squash_msg () {
 		oldsub_short=$(git rev-parse --short "$oldsub")
 		echo "Squashed '$dir/' changes from $oldsub_short..$newsub_short"
 		echo
-		git log --pretty=tformat:'%h %s' "$oldsub..$newsub"
-		git log --pretty=tformat:'REVERT: %h %s' "$newsub..$oldsub"
+		git log --no-show-signature --pretty=tformat:'%h %s' "$oldsub..$newsub"
+		git log --no-show-signature --pretty=tformat:'REVERT: %h %s' "$newsub..$oldsub"
 	else
 		echo "Squashed '$dir/' content from commit $newsub_short"
 	fi
@@ -475,7 +475,7 @@ squash_msg () {
 
 toptree_for_commit () {
 	commit="$1"
-	git log -1 --pretty=format:'%T' "$commit" -- || exit $?
+	git log --no-show-signature -1 --pretty=format:'%T' "$commit" -- || exit $?
 }
 
 subtree_for_commit () {
-- 
2.10.2