Custom actions to preserve file permissions when uploading and downloading artifacts in a Github Workflow

download-tar-action.yml

# File: .github/actions/download-tar/action.yml
name: Download Tar Artifact
description: >
  Download and extract a tar artifact that was previously uploaded in the workflow by the upload-tar
  action

inputs:
  name:
    description: Artifact name
  path:
    description: Destination path
    required: false

runs:
  using: composite
  steps:
    - uses: actions/[email protected]
      with:
        name: ${{ inputs.name }}
        path: ${{ inputs.path }}

    - run: ${{ github.action_path }}/untar.sh "${{ inputs.name }}"
      working-directory: ${{ inputs.path }}
      shell: bash

untar.sh

#!/usr/bin/env bash
# File: .github/actions/download-tar/untar.sh
set -x
name="$1"

if [[ "$name" == '' ]]; then
  dirs=(*/)
else
  dirs=(.)
fi

for dir in ${dirs[@]}; do
  echo "> Extracting: $dir"
  pushd "$dir" > /dev/null
  tar xvf artifact.tar
  rm artifact.tar
  popd > /dev/null
done

upload-tar-action.yml

# File: .github/actions/upload-tar/action.yml
name: Upload Tar Artifact
description: Compress files with tar prior to artifacting to keep file privileges.

inputs:
  name:
    description: Artifact name
  path:
    description: A directory path. The contents of that directory will be tarballed and uploaded.
    required: true

runs:
  using: composite
  steps:

    - run: tar cvf artifact.tar *
      shell: bash
      working-directory: ${{ inputs.path }}

    - uses: actions/[email protected]
      with:
        name: ${{ inputs.name }}
        path: ${{ inputs.path }}/artifact.tar
        overwrite: true

    - run: rm artifact.tar
      shell: bash
      working-directory: ${{ inputs.path }}