ci(docs): add markdown linters and editorconfig

.editorconfig

@@ -0,0 +1,20 @@
+# EditorConfig helps developers define and maintain consistent
+# coding styles between different editors and IDEs
+# editorconfig.org
+
+root = true
+
+[*]
+
+# Change these settings to your own preference
+indent_style = space
+indent_size = 2
+
+# We recommend you to keep these unchanged
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[Makefile]
+indent_style = tab

.github/ISSUE_TEMPLATE/---bug-report.md

@@ -20,6 +20,7 @@ assignees: ''
 **Anything else we need to know?**:
 
 **Environment**:
+
 - External-DNS version (use `external-dns --version`):
 - DNS provider:
 - Others:

.github/workflows/json-yaml-validate.yml

@@ -1,4 +1,4 @@
-name: json-yaml-validate 
+name: json-yaml-validate
 on:
   push:
     branches: [ master ]

.github/workflows/lint.yaml

@@ -1,29 +1,27 @@
 name: Lint
 
 on:
-  push:
-    branches: [ master ]
   pull_request:
     branches: [ master ]
 
-permissions:
-  contents: read  #  to fetch code (actions/checkout)
-  checks: write
-
 jobs:
-
-  build:
+  lint:
+    name: Markdown, Go and OAS
+    runs-on: ubuntu-latest
     permissions:
       contents: read  #  to fetch code (actions/checkout)
-      checks: write  #  to create a new check based on the results (shogo82148/actions-goveralls)
-
-    name: Build
-    runs-on: ubuntu-latest
+      checks: write
     steps:
 
     - name: Check out code into the Go module directory
       uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
+    - name: Lint markdown
+      uses: nosborn/[email protected]
+      with:
+        files: '.'
+        config_file: ".markdownlint.json"
+
     - name: Set up Go 1.x
       uses: actions/setup-go@v5
       with:

.markdownlint.json

@@ -0,0 +1,13 @@
+{
+    "default": true,
+    "MD010": { "code_blocks": false },
+    "MD013": { "line_length": "300" },
+    "MD033": false,
+    "MD036": false,
+    "MD024": false,
+    "MD041": false,
+    "MD029": false,
+    "MD034": false,
+    "MD038": false,
+    "MD046": false
+}

.pre-commit-config.yaml

@@ -0,0 +1,27 @@
+---
+default_language_version:
+  node: system
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: check-added-large-files
+      - id: check-case-conflict
+      - id: check-executables-have-shebangs
+      - id: check-merge-conflict
+      - id: check-shebang-scripts-are-executable
+      - id: check-symlinks
+      - id: destroyed-symlinks
+      - id: end-of-file-fixer
+      - id: fix-byte-order-marker
+      - id: forbid-new-submodules
+      - id: mixed-line-ending
+      - id: trailing-whitespace
+
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.44.0
+    hooks:
+    - id: markdownlint
+
+minimum_pre_commit_version: !!str 3.2

CONTRIBUTING.md

@@ -2,7 +2,7 @@
 
 Welcome to Kubernetes. We are excited about the prospect of you joining our [community](https://git.k8s.io/community)! The Kubernetes community abides by the CNCF [code of conduct](code-of-conduct.md). Here is an excerpt:
 
-_As contributors and maintainers of this project, and in the interest of fostering an open and welcoming community, we pledge to respect all people who contribute through reporting issues, posting feature requests, updating documentation, submitting pull requests or patches, and other activities._
+_In the interest of fostering an open and welcoming community, we pledge to respect all people who contribute through reporting issues, posting feature requests, updating documentation, submitting pull requests or other activities._
 
 ## Getting Started
 

Makefile

@@ -162,6 +162,16 @@ ko:
 	scripts/install-ko.sh
 
 # generate-flags-documentation: Generate documentation (docs/flags.md)
-.PHONE: generate-flags-documentation
+.PHONY: generate-flags-documentation
 generate-flags-documentation:
 	go run internal/gen/docs/flags/main.go
+
+pre-commit-install: ## Install pre-commit hooks
+	@pre-commit install
+	@pre-commit gc
+
+pre-commit-uninstall: ## Uninstall hooks
+	@pre-commit uninstall
+
+pre-commit-validate: ## Validate files with pre-commit hooks
+	@pre-commit run --all-files