Add working directory flag to allow use of action from non-root directory

.github/workflows/reviewdog.yml

@@ -11,17 +11,30 @@ jobs:
         with:
           github_token: ${{ secrets.github_token }}
           reporter: github-pr-check
-          eslint_flags: 'testdata/'
+          eslint_flags: 'testdata/ --ignore-pattern /test-subproject/'
       - name: eslint-github-check
         uses: ./
         with:
           github_token: ${{ secrets.github_token }}
           reporter: github-check
           level: warning
-          eslint_flags: 'testdata/'
+          eslint_flags: 'testdata/ --ignore-pattern /test-subproject/'
       - name: eslint-github-pr-review
         uses: ./
         with:
           github_token: ${{ secrets.github_token }}
           reporter: github-pr-review
-          eslint_flags: 'testdata/'
+          eslint_flags: 'testdata/ --ignore-pattern /test-subproject/'
+      - name: eslint-subproject-github-pr-review
+        uses: ./
+        with:
+          github_token: ${{ secrets.github_token }}
+          reporter: github-pr-review
+          workdir: ./test-subproject
+          eslint_flags: 'test-subproject/sub-testdata/'
+      - name: eslint-subproject
+        uses: ./
+        with:
+          github_token: ${{ secrets.github_token }}
+          workdir: ./test-subproject
+          eslint_flags: 'test-subproject/sub-testdata/'

README.md

@@ -36,6 +36,10 @@ github-pr-review can use Markdown and add a link to rule page in reviewdog repor
 
 Optional. Flags and args of eslint command. Default: '.'
 
+### `workdir`
+
+Optional. The directory from which look for and run eslint. Default '.'
+
 ## Example usage
 
 You also need to install [eslint](https://github.com/eslint/eslint).

action.yml

@@ -17,6 +17,9 @@ inputs:
   eslint_flags:
     description: "flags and args of eslint command. Default: '.'"
     default: '.'
+  workdir:
+    description: "The directory from which look for and run eslint. Default '.'"
+    default: '.'
 runs:
   using: 'docker'
   image: 'Dockerfile'

entrypoint.sh

@@ -4,19 +4,23 @@ cd "$GITHUB_WORKSPACE"
 
 export REVIEWDOG_GITHUB_API_TOKEN="${INPUT_GITHUB_TOKEN}"
 
-if [ ! -f "$(npm bin)/eslint" ]; then
-  npm install
+ESLINT_COMMAND="$(npm bin --prefix $INPUT_WORKDIR)/eslint"
+
+if [ ! -f $ESLINT_COMMAND ]; then
+  npm install --prefix $INPUT_WORKDIR
 fi
 
-$(npm bin)/eslint --version
+eval $ESLINT_COMMAND --version
 
 if [ "${INPUT_REPORTER}" == 'github-pr-review' ]; then
   # Use jq and github-pr-review reporter to format result to include link to rule page.
-  $(npm bin)/eslint -f="json" ${INPUT_ESLINT_FLAGS:-'.'} \
+  eval $ESLINT_COMMAND --resolve-plugins-relative-to $INPUT_WORKDIR \
+    -f="json" -c $INPUT_WORKDIR/.eslintrc.* ${INPUT_ESLINT_FLAGS:-$INPUT_WORKDIR} \
     | jq -r '.[] | {filePath: .filePath, messages: .messages[]} | "\(.filePath):\(.messages.line):\(.messages.column):\(.messages.message) [\(.messages.ruleId)](https://eslint.org/docs/rules/\(.messages.ruleId))"' \
     | reviewdog -efm="%f:%l:%c:%m" -name="eslint" -reporter=github-pr-review -level="${INPUT_LEVEL}"
 else
   # github-pr-check,github-check (GitHub Check API) doesn't support markdown annotation.
-  $(npm bin)/eslint -f="stylish" ${INPUT_ESLINT_FLAGS:-'.'} \
+  eval $ESLINT_COMMAND --resolve-plugins-relative-to $INPUT_WORKDIR \
+    -f="stylish" -c $INPUT_WORKDIR/.eslintrc.* ${INPUT_ESLINT_FLAGS:-$INPUT_WORKDIR} \
     | reviewdog -f="eslint" -reporter="${INPUT_REPORTER:-github-pr-check}" -level="${INPUT_LEVEL}"
 fi

test-subproject/.eslintrc.js

@@ -0,0 +1,19 @@
+module.exports = {
+    "env": {
+        "browser": true,
+        "es6": true
+    },
+    "extends": [
+        "standard"
+    ],
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaVersion": 2018,
+        "sourceType": "module"
+    },
+    "rules": {
+    }
+};

test-subproject/.gitignore

@@ -0,0 +1 @@
+/node_modules/