Add conventional-commit hook (#4)

* Add conventional-commit hook

* Update CHANGELOG

Author: slavcodev

CHANGELOG.md

@@ -17,6 +17,7 @@ Security - in case of vulnerabilities.
 ## [Unreleased]
 ### Added
 - Added hooks `disallow-commits`
+- Added hooks `conventional-commit`
 
 ## [1.1.0] 2019-03-01
 ### Added

conventional-commit/conventional-commit

@@ -0,0 +1,98 @@
+#!/bin/sh
+# Git `commit-msg` hook that looks for patterns the branch name
+# and uses the matches as prefix or suffix of every commit title.
+#
+# This is useful if you have convention to use issue number in the branch,
+# and want to add it automatically to the commit title.
+# For example, you have branch like `FOO-9999-add-hook`, on adding the commit `Add Hook`,
+# the hook may add suffix `Add Hook (FOO-9999)` or prefix `[FOO-9999] Add Hook`.
+#
+# Note: you can use `commit --no-verify` to skip `commit-msg` hooks.
+#
+# Example of config:
+# ~~~
+# [conventional-commit]
+#   excluded-branch = master
+#   excluded-branch = development
+#   prefix-pattern = "FOO-[0-9]+"
+#   suffix-pattern = "FOO-[0-9]+"
+# ~~~
+
+FCR='\033[1;31m' # Red
+FCG='\033[1;32m' # Green
+FCY='\033[0;33m' # Yellow
+FCS='\033[0;37m' # Light gray (silver)
+NC='\033[0m'
+
+report_start() {
+  echo "${FCG}$@${NC}"
+}
+
+report_error() {
+  echo "${FCR}$@${NC}"
+}
+
+report_done() {
+  [[ $# > 0 ]] && echo "${FCG}✓ $@${NC}" || echo "${FCG}✓ Done${NC}"
+}
+
+prefix_pattern=$(git config --get conventional-commit.prefix-pattern)
+suffix_pattern=$(git config --get conventional-commit.suffix-pattern)
+
+if [[ -z ${prefix_pattern} && -z ${suffix_pattern} ]]; then
+  exit
+fi
+
+branch_name=$(git rev-parse --abbrev-ref HEAD)
+
+excluded_branches=$(git config --get-all conventional-commit.excluded-branch)
+
+if [[ -z ${excluded_branches} ]]; then
+  excluded_branches="master"
+fi
+
+for excluded_branch in ${excluded_branches} ; do
+  if [[ "${branch_name}" =~ "${excluded_branch}" ]]; then
+    exit
+  fi
+done
+
+commit_file=$1
+commit_title=$(head -n 1 "${commit_file}")
+
+if [[ -z "${commit_title}" ]]; then
+  exit
+fi
+
+prefix=$(echo "${branch_name}" | grep -Eo "${prefix_pattern}")
+suffix=$(echo "${branch_name}" | grep -Eo "${suffix_pattern}")
+
+if [[ -z "${prefix}" && -z "${suffix}" ]]; then
+  exit
+fi
+
+prefix_exists=$(echo "${commit_title}" | grep -o "^\[${prefix}\] ")
+suffix_exists=$(echo "${commit_title}" | grep -o " (${suffix})$")
+
+commit_title=${commit_title#*]}  # remove prefix ending in "."
+commit_title=${commit_title%(*}  # remove suffix starting with "."
+
+if [[ -z "${prefix_exists}" ]]; then
+  echo "Adding prefix '${prefix}' to the commit title..."
+  sed -i -e 's/'"${commit_title}"'/'"[${prefix}] ${commit_title}"'/g' "${commit_file}"
+else
+  echo "Prefix '${prefix}' already exists, skipping..."
+fi
+
+if [[ -z "${suffix_exists}" ]]; then
+  echo "Adding suffix '${suffix}' to the commit title..."
+  sed -i -e 's/'"${commit_title}"'/'"${commit_title} (${suffix})"'/g' "${commit_file}"
+else
+  echo "Suffix '${suffix}' already exists, skipping..."
+fi
+
+echo "Title was changed to '$(head -n 1 "${commit_file}")'"
+
+report_done
+
+exit $?