[git] shellcheck, minor changes

git/git-changelog

@@ -43,21 +43,21 @@ if [ "$HEADER" != "" ] ; then
 fi
 
 for TAG in $(git tag -l | sort -r) ; do
-	if echo $TAG | egrep '^v[0-9]+(\.[0-9]+)+$' >/dev/null ; then
+	if echo "$TAG" | grep -Eq '^v[0-9]+(\.[0-9]+)+$' ; then
 		# Display current tag's name
-		echo $TAG >&2
+		echo "$TAG" >&2
 
 		# Print empty lines if needed
 		if [ $PRINTNL -eq 1 ] ; then
 			i=0
 			while [ $i -lt $NEWLINES ] ; do
 				echo
-				i=`expr $i + 1`
+				i=$((i + 1))
 			done
 		fi
 
 		# Print the tag message
-		git tag -l $TAG -n$NBLINES | sed 's/ \+$//'
+		git tag -l "$TAG" -n$NBLINES | sed 's/ \+$//'
 
 		PRINTNL=1
 	else

git/git-cherry-move

@@ -11,9 +11,16 @@
 # This script moves a commit from a branch head to another. It is
 # the equivalent of git cherry-pick followed by git reset.
 
-
 set -e
 
+USAGE=$(cat <<EOF
+Usage:
+  $0 <src-branch> <dst-branch> [ reset-arg ]
+
+'reset-arg' is passed to the final reset (can be --hard for example).
+EOF
+)
+
 assert_branch_exists()
 {
 	if ! git for-each-ref refs/heads | grep "/${1}$" >/dev/null ; then
@@ -23,14 +30,10 @@ assert_branch_exists()
 }
 
 if [ $# -lt 2 ] ; then
-	echo "Usage:"
-	echo "  $0 <src-branch> <dst-branch> [ reset-arg ]"
-	echo -n "'reset-arg' is passed to the final reset"
-	echo    " (can be --hard for example)."
+	printf '%s\n' "$USAGE" >&2
 	exit 1
 fi
 
-
 assert_branch_exists "$1"
 SRC="$1"
 shift
@@ -43,4 +46,4 @@ shift
 git checkout "$DST"
 git cherry-pick "$SRC"
 git checkout "$SRC"
-git reset $1 HEAD^
+git reset "$1" HEAD^

git/git-merge-ff-only

@@ -16,9 +16,16 @@
 
 set -e
 
+USAGE=$(cat <<EOF
+Usage:
+  $0 <main_branch> <topic_branch>"
+
+<main_branch> will be fast-forwarded to <topic_branch> if possible."
+EOF
+)
+
 if [ $# -ne 2 ] ; then
-	echo "Usage: $0 <main_branch> <topic_branch>"
-	echo "<main_branch> will be fast-forwarded to <topic_branch> if possible."
+	printf '%s\n' "$USAGE" >&2
 	exit 1
 fi
 
@@ -29,10 +36,10 @@ echo "Trying to merge $TOPIC_BRANCH into $MAIN_BRANCH..."
 
 DIFF="$(git rev-list "$TOPIC_BRANCH".."$MAIN_BRANCH")"
 if [ -z "$DIFF" ] ; then
-	echo "$TOPIC_BRANCH contains all the commits of $MAIN_BRANCH."
+	echo -- "$TOPIC_BRANCH contains all the commits of $MAIN_BRANCH."
 	echo "Fast-forwarding $MAIN_BRANCH to $TOPIC_BRANCH."
 	git branch -f "$MAIN_BRANCH" "$TOPIC_BRANCH"
 else
-	echo "$TOPIC_BRANCH does not contain all the commits of $MAIN_BRANCH."
+	echo -- "$TOPIC_BRANCH does not contain all the commits of $MAIN_BRANCH."
 	echo "Fast-forward impossible, aborting."
 fi

git/git-tag-update

@@ -17,16 +17,21 @@ set -e
 #set -x
 
 if [ $# -ne 1 ] ; then
-	echo "Usage: $0 <tag-name>"
+	echo "Usage: $0 <tag-name>" >&2
 	exit 1
 fi
 
-TAG=$1
+commiter_date()
+{
+	git tag -v "$TAG" 2>/dev/null | grep ^tagger | cut -f5- -d' '
+}
 
-GIT_COMMITTER_DATE="$(git tag -v $TAG 2>/dev/null|grep ^tagger | cut -f5- -d' ')"
+TAG="$1"
+
+GIT_COMMITTER_DATE="$(commiter_date)"
 export GIT_COMMITTER_DATE
-git tag -sf $TAG $TAG
+git tag -sf "$TAG" "$TAG"
 
 echo "Old tag commiter date: $GIT_COMMITTER_DATE"
-GIT_COMMITTER_DATE="$(git tag -v $TAG 2>/dev/null|grep ^tagger | cut -f5- -d' ')"
+GIT_COMMITTER_DATE="$(commiter_date)"
 echo "New tag commiter date: $GIT_COMMITTER_DATE"