trunk-io · EliSchleifer · Jun 9, 2025 · Apr 13, 2025 · Apr 13, 2025 · Apr 14, 2025
diff --git a/README.md b/README.md
@@ -90,7 +90,7 @@ trunk check enable {linter}
 | Textproto       | [txtpbfmt]                                                                                                                 |
 | TOML            | [taplo]                                                                                                                    |
 | Typescript      | [deno], [eslint], [prettier], [rome], [semgrep]                                                                            |
-| YAML            | [prettier], [semgrep], [yamllint]                                                                                          |
+| YAML            | [prettier], [semgrep], [yamlfmt], [yamllint]                                                                               |

 [actionlint]: https://trunk.io/linters/infra/actionlint
 [ansible-lint]: https://github.com/ansible/ansible-lint#readme
@@ -197,6 +197,7 @@ trunk check enable {linter}
 [txtpbfmt]: https://github.com/protocolbuffers/txtpbfmt#readme
 [ty]: https://github.com/astral-sh/ty#readme
 [vale]: https://vale.sh/docs/
+[yamlfmt]: https://github.com/google/yamlfmt#readme
 [yamllint]: https://trunk.io/linters/yaml/yamllint
 [yapf]: https://github.com/google/yapf#readme


diff --git a/linters/yamlfmt/plugin.yaml b/linters/yamlfmt/plugin.yaml
@@ -0,0 +1,45 @@
+version: 0.1
+downloads:
+  - name: yamlfmt
+    downloads:
+      - os:
+          linux: Linux
+          macos: Darwin
+          windows: Windows
+        cpu:
+          x86_64: x86_64
+          arm_64: arm64
+        url: https://github.com/google/yamlfmt/releases/download/v${version}/yamlfmt_${version}_${os}_${cpu}.tar.gz
+tools:
+  definitions:
+    - name: yamlfmt
+      download: yamlfmt
+      known_good_version: 0.1.0
+      shims: [yamlfmt]
+lint:
+  definitions:
+    - name: yamlfmt
+      files: [yaml]
+      description: Formats yaml files
+      commands:
+        - name: format
+          output: rewrite
+          run: yamlfmt ${target}
+          run_from: ${parent}
+          success_codes: [0, 1]
+          cache_results: true
+          formatter: true
+          in_place: true
+          batch: true
+      tools: [yamlfmt]
+      direct_configs:
+        - .yamlfmt
+        - .yamlfmt.yaml
+        - .yamlfmt.yml
+        - yamlfmt.yaml
+        - yamlfmt.yml
+      suggest_if: config_present
+      version_command:
+        parse_regex: ${semver}
+        run: yamlfmt -version
+      known_good_version: 0.1.0
diff --git a/linters/yamlfmt/test_data/basic.in.yaml b/linters/yamlfmt/test_data/basic.in.yaml
@@ -0,0 +1,3 @@
+yaml:
+  array:
+  - item
diff --git a/linters/yamlfmt/test_data/yamlfmt_v0.1.0_basic.fmt.shot b/linters/yamlfmt/test_data/yamlfmt_v0.1.0_basic.fmt.shot
@@ -0,0 +1,8 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Testing formatter yamlfmt test basic 1`] = `
+"yaml:
+  array:
+    - item
+"
+`;
diff --git a/linters/yamlfmt/yamlfmt.test.ts b/linters/yamlfmt/yamlfmt.test.ts
@@ -0,0 +1,9 @@
+import { linterCheckTest, linterFmtTest } from "tests";
+import { osTimeoutMultiplier } from "tests/utils";
+
+// This install is quite slow on some Linux machines.
+jest.setTimeout(600000 * osTimeoutMultiplier);
+
+linterCheckTest({ linterName: "yamlfmt", namedTestPrefixes: ["empty"] });
+
+linterFmtTest({ linterName: "yamlfmt", namedTestPrefixes: ["basic"] });
-Original file line number
+Diff line change
@@ -0,0 +1,3 @@
+    yaml:
+      array:
+      - item