feat(scripts): add commit message template

scripts/git-commit-template.sh

@@ -0,0 +1,82 @@
+#! /bin/bash
+
+function debug_log() {
+  if [[ ! -z "${DEBUG:-}" ]];
+  then
+    echo "${[@]}"
+  fi
+}
+
+function head_2() {
+  local IFS=/
+  local foo
+  set -f # Disable glob expansion
+  foo=( $@ ) # Deliberately unquoted
+  set +f
+  #printf '%d\n' "${#foo[@]}"
+  if [[ ${#foo[@]} -gt 1 ]];
+  then
+    printf '%s/' "${foo[@]:0:2}"
+  elif [[ ${#foo[@]} -gt 0 ]];
+  then
+    printf "${foo[@]:0:1}"
+  else
+    printf ''
+  fi
+}
+
+set -x
+
+MESSAGE_FILE="$1"
+
+debug_log "$(printf 'message: %s\n' "$1")"
+
+# git ls-files -m for modified but unstaged
+MODIFIED_FILES="$(git diff --name-only --cached)"
+
+MODIFIED_PATHS=()
+
+while IFS= read -r file
+do
+  foo="$(head_2 "$file")"
+  debug_log "$(printf 'file: %s\n' "$file")"
+	debug_log "$(printf 'foo: %s\n' "$foo")"
+  MODIFIED_PATHS+=("$foo")
+done <<< "${MODIFIED_FILES}"
+
+debug_log "$(printf 'paths: %d\n' "${#MODIFIED_PATHS[@]}")"
+
+readarray -t UNIQUE_PATHS < <(printf '%s\n' "${MODIFIED_PATHS[@]}" | sort | uniq)
+
+debug_log "$(printf 'uniques: %s\n' "${UNIQUE_PATHS[@]}")"
+
+readarray -t UNIQUE_DIRS < <(for i in ${UNIQUE_PATHS[@]}; do echo $i; done | grep -e '.*/$')
+
+debug_log "$(printf 'dirs: %s\n' "${UNIQUE_DIRS[@]}")"
+
+# git prefix
+GIT_BRANCH="$(git rev-parse --abbrev-ref HEAD)"
+
+BRANCH_PREFIX="$(printf '%s\n' "${GIT_BRANCH}" | sed 's:/.*$::g')"
+
+debug_log "branch: $GIT_BRANCH"
+debug_log "prefix: $BRANCH_PREFIX"
+
+DEFAULT_MESSAGE="$(cat ${MESSAGE_FILE})"
+COMMIT_MESSAGE=""
+
+if [[ ${#UNIQUE_DIRS[@]} -gt 1 ]];
+then
+  debug_log "many paths"
+  COMMIT_MESSAGE="${BRANCH_PREFIX}: ${DEFAULT_MESSAGE}"
+else
+  debug_log "single path"
+  if [[ ! -z "${UNIQUE_DIRS[0]}" ]];
+  then
+    COMMIT_MESSAGE="${BRANCH_PREFIX}(${UNIQUE_DIRS[0]}): ${DEFAULT_MESSAGE}"
+  else
+    COMMIT_MESSAGE="${BRANCH_PREFIX}(???): ${DEFAULT_MESSAGE}"
+  fi
+fi
+
+echo "${COMMIT_MESSAGE}" > "${MESSAGE_FILE}"