Replace custom action by shell script

.github/workflows/python.yml

@@ -26,11 +26,7 @@ jobs:
       - name: Register matcher
         run: echo ::add-matcher::./.github/python_matcher.json
       - name: Test code with pylint
-        uses: ./github_actions/pylint
-        with:
-          config-file: .pylintrc
-          files: '**/*.py'
-          exclude-path: third_party
+        runs: ./tools/run_pylint.sh
 
   yapf:
     runs-on: ubuntu-18.04

github_actions/pylint/Dockerfile

-FROM python:3.7-alpine
-
-RUN apk add --no-cache bash build-base gcc
-RUN pip install --upgrade pip
-RUN pip install pylint
-RUN python --version ; pip --version ; pylint --version
-
-COPY entrypoint.sh /entrypoint.sh
-RUN chmod +x /entrypoint.sh
-ENTRYPOINT ["/entrypoint.sh"]

github_actions/pylint/action.yml

----
-name: 'Pylint'
-description: 'Runs pylint across multiple files/modules'
-author: 'Jean-Michel Picod <jmichel@google.com>'
-inputs:
-  config-file:
-    description: pylintrc configuration file
-    required: false
-  files:
-    description: files, directories, or globs
-    required: true
-  ignore-files:
-    description: files to ignore/exclude
-    required: false
-  exclude-path:
-    description: paths to ignore/exclude
-    required: false
-runs:
-  using: docker
-  image: Dockerfile

github_actions/pylint/entrypoint.sh

-#!/bin/bash
-
-env
-
-PYLINT_CMD="pylint --score=n${INPUT_CONFIG_FILE:+ --rcfile=${INPUT_CONFIG_FILE}}"
-EXCLUDE_PATH=${INPUT_EXCLUDE_PATH:-}
-EXCLUDE_FILES=${INPUT_EXCLUDE_PATH:-}
-
-SUCCESS=0
-for file in ${FILES}
-do
-  fname=$(basename $file)
-  directory=$(dirname $file)
-  if [[ "$directory" =~ "^${EXCLUDE_PATH}" ]]
-  then
-    echo "Ignoring file '$file' (reason: matching exclude-path parameter)"
-    continue
-  fi
-  if [[ "$fname" =~ "${EXCLUDE_FILES}" ]]
-  then
-    echo "Ignoring file '$file' (reason: matching exclude-files parameter)"
-    continue
-  fi
-  # Just to trigger the custom matcher
-  echo PYLINT:$file
-  if ! $PYLINT_CMD $file
-  then
-    SUCCESS=1
-  fi
-done
-
-exit $SUCCESS

tools/run_pylint.sh

+#!/usr/bin/env bash
+
+SUCCESS=0
+
+# Ensure we are at the project root directory
+cd $(readlink -f $(dirname $0))/..
+
+for file in `find . ! -path "./third_party/*" -type f -name '*.py'`
+do
+  # Output header for our custom matcher on Github workflow
+  echo "PYLINT:${file}"
+  if ! pylint --rcfile=.pylintrc --score=n "$file"
+  then
+    SUCCESS=1
+  fi
+done
+
+exit $SUCCESS