chore(ci): enforce 'yamllint' checks

.pre-commit-config.yaml

@@ -1,72 +1,81 @@
-ci:
-  autofix_commit_msg: "chore(ci): pre-commit auto fixes"
-  autoupdate_commit_msg: "chore(ci): pre-commit autoupdate"
-  autoupdate_schedule: quarterly
-repos:
-  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: 'v6.0.0'
-    hooks:
-      - id: end-of-file-fixer
-      - id: trailing-whitespace
-      - id: check-builtin-literals
-      - id: check-executables-have-shebangs
-      - id: check-json
-      - id: check-yaml
-      - id: debug-statements
-      - id: requirements-txt-fixer
-  - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: 'v2.3.0'
-    hooks:
-      - id: mypy
-        additional_dependencies: [types-PyYAML]
-        args: ["--config-file=pyproject.toml", "src/", "docs/"]
-        pass_filenames: false
-  - repo: https://github.com/asottile/pyupgrade
-    rev: 'v3.21.2'
-    hooks:
-      - id: pyupgrade
-        args:
-          - --py39-plus
-  - repo: https://github.com/python-jsonschema/check-jsonschema
-    rev: 0.37.4
-    hooks:
-        - id: check-metaschema
-          files: ^src/rapids_dependency_file_generator/schema.json$
-        - id: check-jsonschema
-          files: ^tests/examples/([^/]*)/dependencies.yaml$
-          args: ["--schemafile", "src/rapids_dependency_file_generator/schema.json"]
-        - id: check-github-workflows
-  - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.15.22
-    hooks:
-      - id: ruff
-        files: src/.*$
-      - id: ruff-format
-        files: src/.*$
-  - repo: https://github.com/rstcheck/rstcheck
-    rev: v6.2.5
-    hooks:
-      - id: rstcheck
-        args: ["--config", "pyproject.toml"]
-        additional_dependencies:
-          - 'rstcheck[sphinx,toml]'
-        exclude:
-          (?x)
-            ^docs/source/_templates/.*$
-  - repo: https://github.com/shellcheck-py/shellcheck-py
-    rev: v0.11.0.1
-    hooks:
-      - id: shellcheck
-  - repo: https://github.com/rapidsai/pre-commit-hooks
-    rev: v1.6.1
-    hooks:
-      - id: verify-pyproject-license
-        exclude:
-          (?x)
-            ^tests/.*$
-  - repo: https://github.com/zizmorcore/zizmor-pre-commit
-    rev: v1.27.0
-    hooks:
-      - id: zizmor
-default_language_version:
-    python: python3
+ci:
+  autofix_commit_msg: "chore(ci): pre-commit auto fixes"
+  autoupdate_commit_msg: "chore(ci): pre-commit autoupdate"
+  autoupdate_schedule: quarterly
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: 'v6.0.0'
+    hooks:
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+      - id: check-builtin-literals
+      - id: check-executables-have-shebangs
+      - id: check-json
+      - id: check-yaml
+      - id: debug-statements
+      - id: requirements-txt-fixer
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: 'v2.3.0'
+    hooks:
+      - id: mypy
+        additional_dependencies: [types-PyYAML]
+        args: ["--config-file=pyproject.toml", "src/", "docs/"]
+        pass_filenames: false
+  - repo: https://github.com/asottile/pyupgrade
+    rev: 'v3.21.2'
+    hooks:
+      - id: pyupgrade
+        args:
+          - --py39-plus
+  - repo: https://github.com/python-jsonschema/check-jsonschema
+    rev: 0.37.4
+    hooks:
+      - id: check-metaschema
+        files: ^src/rapids_dependency_file_generator/schema.json$
+      - id: check-jsonschema
+        files: ^tests/examples/([^/]*)/dependencies.yaml$
+        args: ["--schemafile", "src/rapids_dependency_file_generator/schema.json"]
+      - id: check-github-workflows
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.15.22
+    hooks:
+      - id: ruff
+        files: src/.*$
+      - id: ruff-format
+        files: src/.*$
+  - repo: https://github.com/rstcheck/rstcheck
+    rev: v6.2.5
+    hooks:
+      - id: rstcheck
+        args: ["--config", "pyproject.toml"]
+        additional_dependencies:
+          - 'rstcheck[sphinx,toml]'
+        exclude:
+          (?x)
+            ^docs/source/_templates/.*$
+  - repo: https://github.com/shellcheck-py/shellcheck-py
+    rev: v0.11.0.1
+    hooks:
+      - id: shellcheck
+  - repo: https://github.com/rapidsai/pre-commit-hooks
+    rev: v1.6.1
+    hooks:
+      - id: verify-pyproject-license
+        exclude:
+          (?x)
+            ^tests/.*$
+  - repo: https://github.com/adrienverge/yamllint
+    rev: v1.38.0
+    hooks:
+      - id: yamllint
+        additional_dependencies: [pyyaml]
+        exclude: |
+          (?x)^(
+            .*/output/expected/.*$
+          )
+  - repo: https://github.com/zizmorcore/zizmor-pre-commit
+    rev: v1.27.0
+    hooks:
+      - id: zizmor
+default_language_version:
+  python: python3

.pre-commit-hooks.yaml

@@ -1,8 +1,8 @@
--   id: rapids-dependency-file-generator
-    name: RAPIDS dependency file generator
-    description: Update dependency files according to the RAPIDS dependencies spec
-    entry: rapids-dependency-file-generator
-    language: python
-    files: "dependencies.yaml"
-    pass_filenames: false
-    args: [--warn-all, --strict]
+- id: rapids-dependency-file-generator
+  name: RAPIDS dependency file generator
+  description: Update dependency files according to the RAPIDS dependencies spec
+  entry: rapids-dependency-file-generator
+  language: python
+  files: "dependencies.yaml"
+  pass_filenames: false
+  args: [--warn-all, --strict]

.yamllint.yaml

@@ -0,0 +1,37 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+extends: default
+
+rules:
+  anchors:
+    forbid-undeclared-aliases: true
+    forbid-duplicated-anchors: true
+    forbid-unused-anchors: true
+  braces:
+    forbid: false
+    min-spaces-inside: 0
+    # allow 1 space for jinja templating in conda recipes
+    max-spaces-inside: 1
+    min-spaces-inside-empty: -1
+    max-spaces-inside-empty: -1
+  brackets: enable
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+  commas:
+    max-spaces-before: 0
+    min-spaces-after: 1
+    max-spaces-after: 1
+  comments: disable
+  comments-indentation: disable
+  document-end: disable
+  document-start: disable
+  key-duplicates:
+    forbid-duplicated-merge-keys: true
+  line-length: disable
+  truthy:
+    allowed-values: ['false', 'true']
+    # having problematic value in keys is rare... and also
+    # GitHub Actions' choie of 'on:' triggers this check
+    # ref: https://github.com/adrienverge/yamllint/issues/430
+    check-keys: false

tests/examples/overlapping-deps/dependencies.yaml

@@ -44,7 +44,7 @@ dependencies:
         packages:
           - pip
           - pip:
-            - numpy>=2.0
+              - numpy>=2.0
   depends_on_pandas:
     common:
       - output_types: [conda, requirements, pyproject]
@@ -67,9 +67,9 @@ dependencies:
           # intentional overlap (numpy) with depends_on_numpy's pip list, to
           # test that pip dependencies don't have duplicates
           - pip:
-            # intentionally not in alphabetical order
-            - numpy>=2.0
-            - folium
+              # intentionally not in alphabetical order
+              - numpy>=2.0
+              - folium
   rapids_build_skbuild:
     common:
       - output_types: [conda, requirements, pyproject]

tests/examples/requirements-pip-dict/dependencies.yaml

@@ -11,4 +11,4 @@ dependencies:
         packages:
           - fsspec>=0.6.0
           - pip:
-            - pandas<1.0
+              - pandas<1.0