Implement dot option

README.md

@@ -67,7 +67,6 @@ repo:
 
 # Add '@domain/core' label to any change within the 'core' package
 @domain/core:
-- package/core/*
 - package/core/**/*
 
 # Add 'test' label to any change to *.spec.js files within the source dir
@@ -113,7 +112,23 @@ Various inputs are defined in [`action.yml`](action.yml) to let you configure th
 | `repo-token` | Token to use to authorize label changes. Typically the GITHUB_TOKEN secret | N/A |
 | `configuration-path` | The path to the label configuration file | `.github/labeler.yml` |
 | `sync-labels` | Whether or not to remove labels when matching files are reverted or no longer changed by the PR | `false`
+| `dot` | Whether or not to auto-include paths starting with dot (e.g. `.github`) | `false`
 
-# Contributions
+When `dot` is disabled and you want to include _all_ files in a folder:
+
+```yml
+label1:
+- path/to/folder/**/*
+- path/to/folder/**/.*
+```
+
+If `dot` is enabled:
+
+```yml
+label1:
+- path/to/folder/**/*
+```
+
+## Contributions
 
 Contributions are welcome! See the [Contributor's Guide](CONTRIBUTING.md).

__tests__/labeler.test.ts

@@ -15,15 +15,29 @@ const matchConfig = [{ any: ["*.txt"] }];
 describe("checkGlobs", () => {
   it("returns true when our pattern does match changed files", () => {
     const changedFiles = ["foo.txt", "bar.txt"];
-    const result = checkGlobs(changedFiles, matchConfig);
+    const result = checkGlobs(changedFiles, matchConfig, false);
 
     expect(result).toBeTruthy();
   });
 
   it("returns false when our pattern does not match changed files", () => {
     const changedFiles = ["foo.docx"];
-    const result = checkGlobs(changedFiles, matchConfig);
+    const result = checkGlobs(changedFiles, matchConfig, false);
 
     expect(result).toBeFalsy();
   });
+
+  it("returns false for a file starting with dot if `dot` option is false", () => {
+    const changedFiles = [".foo.txt"];
+    const result = checkGlobs(changedFiles, matchConfig, false);
+
+    expect(result).toBeFalsy();
+  });
+
+  it("returns false for a file starting with dot if `dot` option is true", () => {
+    const changedFiles = [".foo.txt"];
+    const result = checkGlobs(changedFiles, matchConfig, true);
+
+    expect(result).toBeTruthy();
+  });
 });

__tests__/main.test.ts

@@ -18,10 +18,24 @@ const yamlFixtures = {
   "only_pdfs.yml": fs.readFileSync("__tests__/fixtures/only_pdfs.yml"),
 };
 
+const configureInput = (
+  mockInput: Partial<{
+    "repo-token": string;
+    "configuration-path": string;
+    "sync-labels": boolean;
+    dot: boolean;
+  }>
+) => {
+  jest
+    .spyOn(core, "getInput")
+    .mockImplementation((name: string, ...opts) => mockInput[name]);
+};
+
 afterAll(() => jest.restoreAllMocks());
 
 describe("run", () => {
-  it("adds labels to PRs that match our glob patterns", async () => {
+  it("(with dot: false) adds labels to PRs that match our glob patterns", async () => {
+    configureInput({});
     usingLabelerConfigYaml("only_pdfs.yml");
     mockGitHubResponseChangedFiles("foo.pdf");
 
@@ -37,7 +51,36 @@ describe("run", () => {
     });
   });
 
-  it("does not add labels to PRs that do not match our glob patterns", async () => {
+  it("(with dot: true) adds labels to PRs that match our glob patterns", async () => {
+    configureInput({ dot: true });
+    usingLabelerConfigYaml("only_pdfs.yml");
+    mockGitHubResponseChangedFiles(".foo.pdf");
+
+    await run();
+
+    expect(removeLabelMock).toHaveBeenCalledTimes(0);
+    expect(addLabelsMock).toHaveBeenCalledTimes(1);
+    expect(addLabelsMock).toHaveBeenCalledWith({
+      owner: "monalisa",
+      repo: "helloworld",
+      issue_number: 123,
+      labels: ["touched-a-pdf-file"],
+    });
+  });
+
+  it("(with dot: false) does not add labels to PRs that do not match our glob patterns", async () => {
+    configureInput({});
+    usingLabelerConfigYaml("only_pdfs.yml");
+    mockGitHubResponseChangedFiles(".foo.pdf");
+
+    await run();
+
+    expect(removeLabelMock).toHaveBeenCalledTimes(0);
+    expect(addLabelsMock).toHaveBeenCalledTimes(0);
+  });
+
+  it("(with dot: true) does not add labels to PRs that do not match our glob patterns", async () => {
+    configureInput({ dot: true });
     usingLabelerConfigYaml("only_pdfs.yml");
     mockGitHubResponseChangedFiles("foo.txt");
 
@@ -48,15 +91,11 @@ describe("run", () => {
   });
 
   it("(with sync-labels: true) it deletes preexisting PR labels that no longer match the glob pattern", async () => {
-    let mockInput = {
+    configureInput({
       "repo-token": "foo",
       "configuration-path": "bar",
       "sync-labels": true,
-    };
-
-    jest
-      .spyOn(core, "getInput")
-      .mockImplementation((name: string, ...opts) => mockInput[name]);
+    });
 
     usingLabelerConfigYaml("only_pdfs.yml");
     mockGitHubResponseChangedFiles("foo.txt");
@@ -79,15 +118,11 @@ describe("run", () => {
   });
 
   it("(with sync-labels: false) it issues no delete calls even when there are preexisting PR labels that no longer match the glob pattern", async () => {
-    let mockInput = {
+    configureInput({
       "repo-token": "foo",
       "configuration-path": "bar",
       "sync-labels": false,
-    };
-
-    jest
-      .spyOn(core, "getInput")
-      .mockImplementation((name: string, ...opts) => mockInput[name]);
+    });
 
     usingLabelerConfigYaml("only_pdfs.yml");
     mockGitHubResponseChangedFiles("foo.txt");

action.yml

@@ -12,6 +12,10 @@ inputs:
     description: 'Whether or not to remove labels when matching files are reverted'
     default: false
     required: false
+  dot:
+    description: 'Whether or not to auto-include paths starting with dot (e.g. `.github`)'
+    default: false
+    required: false
 
 runs:
   using: 'node12'