Cleanup Builds Directory

cleanup.sh

#!/bin/bash

# Cleanup Builds
#
# Obtains latest Git commit SHAs from branches in remote origin
# and assembles an array of build filenames to retain in a build directory (e.g. app-build-$commit_sha.war)
# Runs command to remove all found files except those identified in array

readonly BUILD_DIR=./builds

git fetch origin
read -r -d '\n' -a remote_branches < <( git branch -r --format="%(refname:lstrip=3)" )

retain_build_commits=()

for branch_name in "${remote_branches[@]}"
do
  # exclude HEAD from branch references
  if [ $branch_name != 'HEAD' ]; then
    if [ $branch_name == 'main' ]; then
      read -r -d '\n' -a branch_commits < <( git log origin/$branch_name -n 5 --format="%h" )
    else
      read -r -d '\n' -a branch_commits < <( git log origin/$branch_name -n 3 --format="%h" )
    fi
    retain_build_commits+=( ${branch_commits[@]} )
  fi
done

keep_files=()
for commit_sha in "${retain_build_commits[@]}"
do
  keep_files+=("app-build-$commit_sha.war")
done

# delete all files in builds directory except those specified to keep
find $BUILD_DIR -type f -maxdepth 1 $(printf "! -name %s " ${keep_files[*]}) -exec rm {} \;