action.yml

# Branch-Pruner | GitHub Action
# 
# Description: Truncates the old commit history of one/multiple selected target branch(es)
# Author: Sitdisch
# Version: v2.0
# Source: https://github.com/myactionway/branch-pruner-action
# License: MIT
# Copyright (c) 2021 Sitdisch
# 
# CAUTION: IT IS A POWERFUL TOOL AND YOU USE IT AT YOUR OWN RISK. CUTS CAN'T BE UNDONE.

name: 'Branch-Pruner'
author: 'Sitdisch'
description: "Reduces the repo-size by manually & automatically truncating a branch's history. Newer commits & file versions are preserved"
branding:
  icon: scissors
  color: red

inputs:
  new_first_commit:
    description: 'New first commit'
    required: true
  branch:
    description: 'Branch to be pruned'
    required: true
  user_name:
    description: 'User who should commit'
    default: 'github-actions[bot]'
  user_email:
    description: 'User e-mail address'
    default: '41898282+github-actions[bot]@users.noreply.github.com'

runs:
  using: "composite"
  steps:
    - run: |
        git config --local user.email ${{ inputs.user_email }}
        git config --local user.name ${{ inputs.user_name }}
        COMMIT_ID=$(git rev-parse ${{ inputs.new_first_commit }})
        COMMIT_MESSAGE=$(git log --format=%B -n 1 "$COMMIT_ID" )" [ Branch-Pruner[bot]: Earlier Commits Truncated ]"
        git checkout --orphan pruner_temp_branch "$COMMIT_ID"
        git commit -m "$COMMIT_MESSAGE"
        git rebase --onto pruner_temp_branch $COMMIT_ID ${{ inputs.branch }}
        git branch -D pruner_temp_branch
        git push origin HEAD --force
      shell: bash