Merge pull request #34 from scpwiki/stylelint

Add stylelint

.github/workflows/stylelint.yaml

@@ -0,0 +1,15 @@
+on:
+  push:
+    paths:
+      - '*.css'
+
+name: Stylelint
+
+jobs:
+  lint:
+    name: Check CSS
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-hub/stylelint@master

.stylelintrc.yaml

@@ -0,0 +1,101 @@
+---
+
+extends: stylelint-config-standard
+
+rules:
+  linebreaks: unix
+  indentation: tab
+  unicode-bom: never
+
+  max-empty-lines: 2
+  max-line-length: 80
+  max-nesting-depth: 2
+  no-eol-whitespace: true
+  no-empty-first-line: true
+  no-missing-end-of-source-newline: true
+
+  no-unknown-animations: true
+
+  number-leading-zero: never
+  rule-empty-line-before:
+    - always
+    - except: ['after-single-line-comment', 'first-nested']
+  property-case: lower
+  value-keyword-case: lower
+  string-quotes: single
+  color-hex-case: lower
+  font-family-name-quotes: always-where-recommended
+
+  comment-empty-line-before:
+    - always
+    - except: ['first-nested']
+  comment-whitespace-inside: always
+  comment-word-disallowed-list: ['TODO', 'FIXME']
+
+  value-list-comma-newline-after: always-multi-line
+  value-list-comma-newline-before: never-multi-line
+  value-list-comma-space-after: always-single-line
+  value-list-comma-space-before: never
+  value-list-max-empty-lines: 0
+
+  declaration-block-semicolon-newline-after: always-multi-line
+  declaration-block-semicolon-newline-before: never-multi-line
+  declaration-block-semicolon-space-after: always-single-line
+  declaration-block-semicolon-space-before: never
+  declaration-block-trailing-semicolon: always
+
+  declaration-bang-space-after: never
+  declaration-bang-space-before: always
+  declaration-colon-newline-after: always-multi-line
+  declaration-colon-space-after: always-single-line
+  declaration-colon-space-before: never
+  declaration-empty-line-before: never
+
+  custom-property-empty-line-before: never
+
+  block-closing-brace-empty-line-before: never
+  block-closing-brace-newline-after: always
+  block-closing-brace-newline-before: always
+  block-closing-brace-space-after: never-single-line
+  block-closing-brace-space-before: always-single-line
+  block-opening-brace-newline-after: always-multi-line
+  block-opening-brace-newline-before: never-single-line
+  block-opening-brace-space-after: always-single-line
+  block-opening-brace-space-before: always
+
+  selector-list-comma-newline-after: always-multi-line
+  selector-list-comma-newline-before: never-multi-line
+  selector-list-comma-space-after: always-single-line
+  selector-list-comma-space-before: never-single-line
+
+  selector-attribute-brackets-space-inside: never
+  selector-attribute-operator-space-after: never
+  selector-attribute-operator-space-before: never
+  selector-combinator-space-after: always
+  selector-combinator-space-before: always
+  selector-descendant-combinator-no-non-space: true
+  selector-pseudo-class-case: lower
+  selector-pseudo-class-parentheses-space-inside: never
+  selector-pseudo-element-case: lower
+  selector-type-case: lower
+
+  at-rule-name-case: lower
+  at-rule-name-space-after: always-single-line
+  at-rule-semicolon-newline-after: always
+  at-rule-semicolon-space-before: never
+
+  media-query-list-comma-newline-after: always-multi-line
+  media-query-list-comma-newline-before: never-multi-line
+  media-query-list-comma-space-after: always
+  media-query-list-comma-space-before: never
+
+  media-feature-colon-space-after: always
+  media-feature-colon-space-before: never
+  media-feature-name-case: lower
+  media-feature-parentheses-space-inside: never
+  media-feature-range-operator-space-after: always
+  media-feature-range-operator-space-before: always
+
+  # Disable this rule for now, it produces hundreds of incidents
+  # and would require significant refactoring to resolve.
+  no-descending-specificity: null

README.md

@@ -1,5 +1,12 @@
 ## Sigma-9
 
+<p>
+  <a href="https://github.com/scpwiki/sigma9/actions?query=workflow%3A%22Stylelint%22">
+    <img src="https://github.com/scpwiki/sigma9/workflows/Stylelint/badge.svg"
+         alt="Rust CI badge">
+  </a>
+</p>
+
 This is the repository for the Sigma-9 theme, the default CSS used to style the [SCP Wiki](http://www.scpwiki.com). It was originally created by [Aelanna](http://www.wikidot.com/user:info/aelanna) and is presently maintained by the SCP Wiki Technical Team.
 
 This theme is available under the wiki's [Creative Commons Attribution-ShareAlike 3.0 license (CC-BY-SA)](https://creativecommons.org/licenses/by-sa/3.0/).