Post commit hook to increment version of JSON file

post-commit

#!/bin/bash

# Install command:
# curl https://gist.githubusercontent.com/florianpasteur/f1cc272815f08d133ead0ddd2c21e421/raw -o .git/hooks/post-commit &&  chmod +x .git/hooks/post-commit


IS_AMEND=$(ps -ocommand= -p $PPID | grep -e '--amend');

if [ -n "$IS_AMEND" ]; then
  exit 0;
fi

FULL_VERSION=$(jq -r '.version' manifest.json)
IFS='.' read -ra VER <<< $FULL_VERSION

edit_json() {
  file=$1
  shift
  jq "$*" "${file}" >/tmp/jq-tmp.json && cat /tmp/jq-tmp.json >"${file}"
}

get_new_version() {
  VER_INCREMENTED=$(($3+1))
  echo $1"."$2"."$VER_INCREMENTED
}


NEW_VER=$(get_new_version $VER)

if git diff manifest.json; then
  git stash
  edit_json manifest.json '.version="'$NEW_VER'"'
  git add manifest.json
  git commit --amend --no-edit --no-verify
  git stash pop
else
  edit_json manifest.json '.version="'$NEW_VER'"'
  git add manifest.json
  git commit --amend --no-edit --no-verify
fi