Refactor action to be composite instead of docker based

.github/dependabot.yml

@@ -1,10 +1,6 @@
 version: 2
 
 updates:
-  - package-ecosystem: docker
-    directory: /
-    schedule:
-      interval: weekly
   - package-ecosystem: github-actions
     directory: /
     schedule:

action.yml

@@ -24,9 +24,33 @@ inputs:
     required: false
     default: '/home/runner/work'
 
+
 runs:
-  using: 'docker'
-  image: 'Dockerfile'
+  using: 'composite'
+  steps:
+    - name: Setup Python
+      uses: actions/setup-python@v5
+      id: setup-python
+      with:
+        python-version: "3.11"
+        update-environment: false
+    - name: Setup venv
+      run: ${{ steps.setup-python.outputs.python-path }} -m venv ${GITHUB_ACTION_PATH}/venv
+
+      shell: bash -l {0}
+    - name: Install dependencies
+      run: ${GITHUB_ACTION_PATH}/venv/bin/python -m pip install -r ${GITHUB_ACTION_PATH}/requirements.txt
+      shell: bash -l {0}
+    - name: Run action
+      run: ${GITHUB_ACTION_PATH}/action_launcher.bash
+      shell: bash -l {0}
+      env:
+        INPUT_GITHUB_TOKEN: ${{ inputs.github_token }}
+        INPUT_CLANG_TIDY_FIXES: ${{ inputs.clang_tidy_fixes }}
+        INPUT_PULL_REQUEST_ID: ${{ inputs.pull_request_id }}
+        INPUT_REQUEST_CHANGES: ${{ inputs.request_changes }}
+        INPUT_SUGGESTIONS_PER_COMMENT: ${{ inputs.suggestions_per_comment }}
+        INPUT_REPO_PATH_PREFIX: ${{ inputs.repo_path_prefix }}
 branding:
   icon: 'cpu'
   color: 'green'

entrypoint.sh → action_launcher.bash

@@ -2,7 +2,7 @@
 
 set -eu
 
-if [ -z "$INPUT_PULL_REQUEST_ID" ]; then
+if [ -z "${INPUT_PULL_REQUEST_ID:-}" ]; then
   pull_request_id="$(jq "if (.issue.number != null) then .issue.number else .number end" < "$GITHUB_EVENT_PATH")"
 
   if [ "$pull_request_id" == "null" ]; then
@@ -27,7 +27,7 @@ if [ ! -f "$INPUT_CLANG_TIDY_FIXES" ]; then
   exit 0
 fi
 
-/action/run_action.py \
+ "${GITHUB_ACTION_PATH}/venv/bin/python" "${GITHUB_ACTION_PATH}/run_action.py" \
   --clang-tidy-fixes "$INPUT_CLANG_TIDY_FIXES" \
   --pull-request-id "$pull_request_id" \
   --repository "$GITHUB_REPOSITORY" \