Add core files

entrypoint.sh

@@ -0,0 +1,48 @@
+#!/bin/sh
+set -eu
+
+# Set up .netrc file with GitHub credentials
+git_setup ( ) {
+  cat <<- EOF > $HOME/.netrc
+        machine github.com
+        login $GITHUB_ACTOR
+        password $GITHUB_TOKEN
+
+        machine api.github.com
+        login $GITHUB_ACTOR
+        password $GITHUB_TOKEN
+EOF
+    chmod 600 $HOME/.netrc
+
+    git config --global user.email "actions@github.com"
+    git config --global user.name "Add & Commit GitHub Action"
+}
+
+# This is needed to make the check work for untracked files
+echo "Staging files in commit path..."
+git add "${INPUT_PATH}"
+
+echo "Checking for uncommitted changes in the git working tree..."
+# This section only runs if there have been file changes
+if ! git diff --cached --exit-code
+then
+    git_setup
+
+    git fetch 
+
+    # Switch to branch from current Workflow run
+    echo "Creating and switching branch..."
+    git branch "${GITHUB_REF:11}"
+    git checkout "${GITHUB_REF:11}"
+
+    echo "Adding files..."
+    git add "${INPUT_PATH}"
+
+    echo "Creating commit..."
+    git commit -m "$INPUT_MESSAGE" --author="$INPUT_AUTHOR_NAME <$INPUT_AUTHOR_EMAIL>"
+
+    echo "Pushing to repo..."
+    git push --set-upstream origin "${GITHUB_REF:11}"
+else
+    echo "Working tree clean. Nothing to commit."
+fi