feat: add option to exclude submodules when detecting changes

.github/workflows/test.yml

@@ -682,6 +682,27 @@ jobs:
           echo "${{ toJSON(steps.changed-files.outputs) }}"
         shell:
           bash
+
+      - name: Run changed-files excluding submodule
+        id: changed-files-exclude-submodule
+        uses: ./
+        with:
+          base_sha: "85bd869"
+          sha: "adde7bb"
+          fetch_depth: 60000
+          exclude_submodules: true
+
+      - name: Verify no added files
+        if: steps.changed-files-exclude-submodule.outputs.added_files != ''
+        run: |
+          echo "Expected: ('') got ${{ steps.changed-files-exclude-submodule.outputs.added_files }}"
+          exit 1
+
+      - name: Show output
+        run: |
+          echo "${{ toJSON(steps.changed-files-exclude-submodule.outputs) }}"
+        shell:
+          bash
   test-yaml:
     name: Test changed-files with yaml
     runs-on: ubuntu-latest

action.yml

@@ -223,6 +223,10 @@ inputs:
     description: "Output changed files in a format that can be used for matrix jobs. Alias for setting inputs `json` to `true` and `escape_json` to `false`."
     required: false
     default: "false"
+  exclude_submodules:
+    description: "Exclude changes to submodules."
+    required: false
+    default: "false"
 
 outputs:
   added_files:

package.json

@@ -14,6 +14,7 @@
     "lint:fix": "eslint --fix src/*.ts src/**/*.ts",
     "package": "ncc build lib/main.js --source-map --license licenses.txt",
     "test": "jest --coverage",
+    "update-snapshot": "jest -u",
     "all": "yarn build && yarn format && yarn lint && yarn package && yarn test"
   },
   "repository": {