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index.js
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index.js
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const { createPlugin } = require('stylelint')
const hasBlock = require('stylelint/lib/utils/hasBlock')
const optionsMatches = require('stylelint/lib/utils/optionsMatches')
const report = require('stylelint/lib/utils/report')
const ruleMessages = require('stylelint/lib/utils/ruleMessages')
const { isAtRule } = require('stylelint/lib/utils/typeGuards')
const validateOptions = require('stylelint/lib/utils/validateOptions')
const ruleName = 'stylistic/declaration-block-trailing-semicolon'
const messages = ruleMessages(ruleName, {
expected: 'Expected a trailing semicolon',
rejected: 'Unexpected trailing semicolon',
})
const meta = {
url: 'https://github.com/elirasza/stylelint-stylistic/tree/main/lib/rules/declaration-block-trailing-semicolon',
fixable: true,
}
/** @type {import('stylelint').Rule} */
const rule = (primary, secondaryOptions, context) => (root, result) => {
const validOptions = validateOptions(
result,
ruleName,
{
actual: primary,
possible: ['always', 'never'],
},
{
actual: secondaryOptions,
possible: {
ignore: ['single-declaration'],
},
optional: true,
},
)
if (!validOptions) {
return
}
root.walkAtRules((atRule) => {
if (!atRule.parent) throw new Error('A parent node must be present')
if (atRule.parent === root) {
return
}
if (atRule !== atRule.parent.last) {
return
}
if (hasBlock(atRule)) {
return
}
checkLastNode(atRule)
})
root.walkDecls((decl) => {
if (!decl.parent) throw new Error('A parent node must be present')
if (decl.parent.type === 'object') {
return
}
if (decl !== decl.parent.last) {
return
}
checkLastNode(decl)
})
/**
* @param {import('postcss').Node} node
*/
function checkLastNode(node) {
if (!node.parent) throw new Error('A parent node must be present')
const hasSemicolon = node.parent.raws.semicolon
const ignoreSingleDeclaration = optionsMatches(
secondaryOptions,
'ignore',
'single-declaration',
)
if (ignoreSingleDeclaration && node.parent.first === node) {
return
}
let message
if (primary === 'always') {
if (hasSemicolon) {
return
}
// auto-fix
if (context.fix) {
node.parent.raws.semicolon = true
if (isAtRule(node)) {
node.raws.between = ''
node.parent.raws.after = ' '
}
return
}
message = messages.expected
} else if (primary === 'never') {
if (!hasSemicolon) {
return
}
// auto-fix
if (context.fix) {
node.parent.raws.semicolon = false
return
}
message = messages.rejected
} else {
throw new Error(`Unexpected primary option: "${primary}"`)
}
report({
message,
node,
index: node.toString().trim().length - 1,
result,
ruleName,
})
}
}
rule.ruleName = ruleName
rule.messages = messages
rule.meta = meta
module.exports = { messages, meta, plugin: createPlugin(ruleName, rule), rule, ruleName }