diff --git a/entrypoint.sh b/entrypoint.sh
index df82332c..31adf014 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,3 +1,46 @@
 #!/usr/bin/env bash
 
 set -e
+
+if [[ -z $GITHUB_BASE_REF ]]; then
+  echo "Skipping: This should only run on pull_request.";
+  exit 0;
+fi
+
+GITHUB_TOKEN=$1
+TARGET_BRANCH=${GITHUB_BASE_REF}
+CURRENT_BRANCH=${GITHUB_HEAD_REF}
+
+git remote set-url origin https://${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}
+
+echo "Getting base branch..."
+git config --local remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
+git config --local --add remote.origin.fetch "+refs/tags/*:refs/tags/*"
+
+git fetch --depth=1 origin ${TARGET_BRANCH}:${TARGET_BRANCH}
+
+echo "Getting head sha..."
+HEAD_SHA=$(git rev-parse ${TARGET_BRANCH} || true)
+
+echo "Getting diff..."
+
+ADDED_FILES=$(git diff --diff-filter=A --name-only ${HEAD_SHA} || true)
+COPIED_FILES=$(git diff --diff-filter=C --name-only ${HEAD_SHA} || true)
+DELETED_FILES=$(git diff --diff-filter=D --name-only ${HEAD_SHA} || true)
+MODIFIED_FILES=$(git diff --diff-filter=M --name-only ${HEAD_SHA} || true)
+RENAMED_FILES=$(git diff --diff-filter=R --name-only ${HEAD_SHA} || true)
+CHANGED_FILES=$(git diff --diff-filter=T --name-only ${HEAD_SHA} || true)
+UNMERGED_FILES=$(git diff --diff-filter=R --name-only ${HEAD_SHA} || true)
+UNKNOWN_FILES=$(git diff --diff-filter=X --name-only ${HEAD_SHA} || true)
+ALL_CHANGED_FILES=$(git diff --diff-filter="*" --name-only ${HEAD_SHA} || true)
+
+
+echo "::set-output name=added_files::$ADDED_FILES"
+echo "::set-output name=copied_files::$COPIED_FILES"
+echo "::set-output name=deleted_files::$DELETED_FILES"
+echo "::set-output name=modified_files::$MODIFIED_FILES"
+echo "::set-output name=renamed_files::$RENAMED_FILES"
+echo "::set-output name=changed_files::$CHANGED_FILES"
+echo "::set-output name=unmerged_files::$UNMERGED_FILES"
+echo "::set-output name=unknown_files::$UNKNOWN_FILES"
+echo "::set-output name=all_changed_files::$ALL_CHANGED_FILES"