releng: add hacky commit log generator

releng/make-commit-log.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+
+cleanup() {
+  [ -f "${MASTER_COMMITS}" ] && rm "${MASTER_COMMITS}"
+  [ -f "${RELEASE_COMMITS}" ] && rm "${RELEASE_COMMITS}"
+  git checkout "${CUR_BRANCH}"
+}
+
+usage() {
+  cat <<-EOF
+
+Usage: $0 [OPTIONS]
+
+OPTIONS
+  -m  <master branch>
+      Set the master branch, otherwise default to 'master'
+
+  -r  <release branch>
+      Set the release tracking branch
+
+  -t  <common tag>
+      Set the tag where commits diverged
+
+  -h  Show this message and exit
+EOF
+exit
+}
+
+MASTER="master"
+RELEASE=
+TAG=
+
+while getopts "m:r:t:h" opt; do
+  case "${opt}" in
+    m)
+      MASTER="${OPTARG}"
+      ;;
+    r)
+      RELEASE="${OPTARG}"
+      ;;
+    t)
+      TAG="${OPTARG}"
+      ;;
+    h|*)
+      usage
+      ;;
+  esac
+done
+
+[ -z "${RELEASE}" ] && usage
+[ -z "${TAG}" ] && usage
+
+trap cleanup EXIT INT TERM
+
+MASTER_COMMITS="$( mktemp )"
+RELEASE_COMMITS="$( mktemp )"
+CUR_BRANCH="$( git rev-parse --abbrev-ref HEAD )"
+
+(
+  git checkout "${MASTER}" && git log --format="%h;%s (%an)" "${TAG}..HEAD" > "${MASTER_COMMITS}"
+  git checkout "${RELEASE}" && git log --format="%h;%s (%an)" "${TAG}..HEAD" > "${RELEASE_COMMITS}"
+  git checkout "${CUR_BRANCH}"
+) >/dev/null 2>&1 
+
+while IFS=';' read -r sha message; do
+  if grep -q "${message}" "${RELEASE_COMMITS}" ; then
+    continue
+  else
+    echo "* ${sha} ${message}"
+  fi
+done < "${MASTER_COMMITS}"