Update commit-msg hook

Modified in https://gerrit-review.googlesource.com/c/gerrit/+/394841.

Change-Id: I381e48fbdb92b33454219dd9d945a1756e551a77
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/395577
Reviewed-by: Mike Frysinger <vapier@google.com>
Tested-by: Orgad Shaneh <orgads@gmail.com>
Commit-Queue: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Ernesto Rodriguez <guez30nesto@gmail.com>

hooks/commit-msg

@@ -1,5 +1,5 @@
 #!/bin/sh
-# From Gerrit Code Review 3.6.1 c67916dbdc07555c44e32a68f92ffc484b9b34f0
+# From Gerrit Code Review 3.10.0 d5403dbf335ba7d48977fc95170c3f7027c34659
 #
 # Part of Gerrit Code Review (https://www.gerritcodereview.com/)
 #
@@ -31,14 +31,21 @@ if test ! -f "$1" ; then
 fi
 
 # Do not create a change id if requested
-if test "false" = "$(git config --bool --get gerrit.createChangeId)" ; then
-  exit 0
-fi
+create_setting=$(git config --get gerrit.createChangeId)
+case "$create_setting" in
+  false)
+    exit 0
+    ;;
+  always)
+    ;;
+  *)
+    # Do not create a change id for squash/fixup commits.
+    if head -n1 "$1" | LC_ALL=C grep -q '^[a-z][a-z]*! '; then
+      exit 0
+    fi
+    ;;
+esac
 
-# Do not create a change id for squash commits.
-if head -n1 "$1" | grep -q '^squash! '; then
-  exit 0
-fi
 
 if git rev-parse --verify HEAD >/dev/null 2>&1; then
   refhash="$(git rev-parse HEAD)"
@@ -51,7 +58,7 @@ dest="$1.tmp.${random}"
 
 trap 'rm -f "$dest" "$dest-2"' EXIT
 
-if ! git stripspace --strip-comments < "$1" > "${dest}" ; then
+if ! cat "$1" | sed -e '/>8/q' | git stripspace --strip-comments > "${dest}" ; then
    echo "cannot strip comments from $1"
    exit 1
 fi
@@ -65,7 +72,7 @@ reviewurl="$(git config --get gerrit.reviewUrl)"
 if test -n "${reviewurl}" ; then
   token="Link"
   value="${reviewurl%/}/id/I$random"
-  pattern=".*/id/I[0-9a-f]\{40\}$"
+  pattern=".*/id/I[0-9a-f]\{40\}"
 else
   token="Change-Id"
   value="I$random"
@@ -92,7 +99,7 @@ fi
 # Avoid the --where option which only appeared in Git 2.15
 if ! git -c trailer.where=before interpret-trailers \
          --trailer "Signed-off-by: $token: $value" < "$dest-2" |
-     sed -re "s/^Signed-off-by: ($token: )/\1/" \
+     sed -e "s/^Signed-off-by: \($token: \)/\1/" \
          -e "/^Signed-off-by: SENTINEL/d" > "$dest" ; then
   echo "cannot insert $token line in $1"
   exit 1