entrypoint.sh

#!/bin/bash

set -e

FOLDER=$1
GITHUB_USERNAME=$2
STARTER_NAME="${3:-name}"
BRANCH_NAME="${4:-main}"
BASE=$(pwd)

git config --global user.email "johno-actions-push-subdirectories@example.org"
git config --global user.name "$GITHUB_USERNAME"

echo "Cloning folders in $FOLDER and pushing to $GITHUB_USERNAME"
echo "Using $STARTER_NAME as the package.json key"

# sync to read-only clones
for folder in $FOLDER/*; do
  [ -d "$folder" ] || continue # only directories
  cd $BASE

  echo "$folder"

  NAME=$(cat $folder/package.json | jq --arg name "$STARTER_NAME" -r '.[$name]')
  echo "  Name: $NAME"
  IS_WORKSPACE=$(cat $folder/package.json | jq -r '.workspaces')
  CLONE_DIR="__${NAME}__clone__"
  echo "  Clone dir: $CLONE_DIR"

  # clone, delete files in the clone, and copy (new) files over
  # this handles file deletions, additions, and changes seamlessly
  git clone --depth 1 https://$API_TOKEN_GITHUB@github.com/$GITHUB_USERNAME/$NAME.git $CLONE_DIR &> /dev/null
  cd $CLONE_DIR
  find . | grep -v ".git" | grep -v "^\.*$" | xargs rm -rf # delete all files (to handle deletions in monorepo)
  cp -r $BASE/$folder/. .

  # generate a new yarn.lock file based on package-lock.json unless you're in a workspace
  if [ "$IS_WORKSPACE" = null ]; then
    echo "  Regenerating yarn.lock"
    rm -rf yarn.lock
    yarn
  fi

  # Commit if there is anything to
  if [ -n "$(git status --porcelain)" ]; then
    echo  "  Committing $NAME to $GITHUB_REPOSITORY"
    git add .
    git commit --message "Update $NAME from $GITHUB_REPOSITORY"
    git push origin $BRANCH_NAME
    echo  "  Completed $NAME"
  else
    echo "  No changes, skipping $NAME"
  fi

  cd $BASE
done