#!/bin/bash

FEATURE_BRANCH=

# https://docs.github.com/en/actions/reference/environment-variables#default-environment-variables

# skip default branch and tags
if [[ $GITHUB_REF =~ ^refs/heads/master$ ]] || [[ $GITHUB_REF =~ ^refs/tags/ ]]; then
  exit 0;
fi

# GITHUB_HEAD_REF is set for pull request
FEATURE_BRANCH=$([ $GITHUB_HEAD_REF != "" ] && echo $GITHUB_HEAD_REF || echo "$GITHUB_REF" | cut -d"/" -f3)

echo "Attempting to install diagram-js@$FEATURE_BRANCH";

npm install "diagram-js@bpmn-io/diagram-js#$FEATURE_BRANCH";

if [ $? -ne 0 ]; then
  echo "Falling back to diagram-js@develop";

  npm install "diagram-js@bpmn-io/diagram-js#develop";
fi