branch-blaster

#!/usr/bin/env bash

# Ensure you install somewhere on your path.
# I prefer creating a symlink to /usr/local/bin/branch_blaster

manifestPath="/tmp/branches-in-master.txt"
branchBlasterLog="/tmp/branch-blaster.log"

initLog() {
  touch "${branchBlasterLog}"
}

timestamp() {
  date +"%y%m%dT%H%M%S"
}

getMergedBranchesFromMaster() {
  git branch --merged master | grep -vE "dev|master" | awk '{print $1}'
}

generateBranchManifest() {
  $1 > "${manifestPath}"
}

branchCount() {
  wc -l "${manifestPath}" | awk '{print $1}'
}

deleteLocalBranches() {
  while read -r branch; do
    git branch -D "${branch}" > /dev/null
    echo "$(timestamp) - Removed Branch: ${branch}" | tee -a "${branchBlasterLog}"
  done < "${manifestPath}"
}

main() {
  initLog
  echo "$(timestamp) - Run Started" | tee -a "${branchBlasterLog}"

  echo "$(timestamp) - Identifying branches merged into master..."
  generateBranchManifest getMergedBranchesFromMaster
  echo "$(timestamp) - Found $(branchCount) branch(es)" | tee -a "${branchBlasterLog}"
  echo -e "\r\n$(timestamp) - Manifest can be viewed here: ${manifestPath}"


  echo -e "\r\n$(timestamp) - Would you like to delete these branches?\r\n"
  echo "Press [ENTER] to PROCEED"
  echo "Press [CTRL+C] to EXIT"

  read -r

  echo "$(timestamp) - Cleanup Started" | tee -a "${branchBlasterLog}"
  deleteLocalBranches
  echo "$(timestamp) - Cleanup Finished" | tee -a "${branchBlasterLog}"
}

main