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index.js
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index.js
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"use strict"
const path = require("path")
const extract = require("./extract")
const utils = require("./utils")
const splatSet = utils.splatSet
const getSettings = require("./settings").getSettings
const getFileMode = require("./getFileMode")
const PREPARE_RULE_NAME = "__eslint-plugin-html-prepare"
const LINTER_ISPATCHED_PROPERTY_NAME =
"__eslint-plugin-html-verify-function-is-patched"
// Disclaimer:
//
// This is not a long term viable solution. ESLint needs to improve its processor API to
// provide access to the configuration before actually preprocess files, but it's not
// planed yet. This solution is quite ugly but shouldn't alter eslint process.
//
// Related github issues:
// https://github.com/eslint/eslint/issues/3422
// https://github.com/eslint/eslint/issues/4153
const needles = [
path.join("lib", "linter", "linter.js"), // ESLint 6+
path.join("lib", "linter.js"), // ESLint 5-
]
iterateESLintModules(patch)
function getLinterFromModule(moduleExports) {
return moduleExports.Linter
? moduleExports.Linter // ESLint 6+
: moduleExports // ESLint 5-
}
function getModuleFromRequire() {
return getLinterFromModule(require("eslint/lib/linter"))
}
function getModuleFromCache(key) {
if (!needles.some((needle) => key.endsWith(needle))) return
const module = require.cache[key]
if (!module || !module.exports) return
const Linter = getLinterFromModule(module.exports)
if (
typeof Linter === "function" &&
typeof Linter.prototype.verify === "function"
) {
return Linter
}
}
function iterateESLintModules(fn) {
if (!require.cache || Object.keys(require.cache).length === 0) {
// Jest is replacing the node "require" function, and "require.cache" isn't available here.
fn(getModuleFromRequire())
return
}
let found = false
for (const key in require.cache) {
const Linter = getModuleFromCache(key)
if (Linter) {
fn(Linter)
found = true
}
}
if (!found) {
let eslintPath, eslintVersion
try {
eslintPath = require.resolve("eslint")
} catch (e) {
eslintPath = "(not found)"
}
try {
eslintVersion = require("eslint/package.json").version
} catch (e) {
eslintVersion = "n/a"
}
const parentPaths = (module) =>
module ? [module.filename].concat(parentPaths(module.parent)) : []
throw new Error(
`eslint-plugin-html error: It seems that eslint is not loaded.
If you think this is a bug, please file a report at https://github.com/BenoitZugmeyer/eslint-plugin-html/issues
In the report, please include *all* those informations:
* ESLint version: ${eslintVersion}
* ESLint path: ${eslintPath}
* Plugin version: ${require("../package.json").version}
* Plugin inclusion paths: ${parentPaths(module).join(", ")}
* NodeJS version: ${process.version}
* CLI arguments: ${JSON.stringify(process.argv)}
* Content of your lock file (package-lock.json or yarn.lock) or the output of \`npm list\`
* How did you run ESLint (via the command line? an editor plugin?)
* The following stack trace:
${new Error().stack.slice(10)}
`
)
}
}
function patch(Linter) {
const verifyMethodName = Linter.prototype._verifyWithoutProcessors
? "_verifyWithoutProcessors" // ESLint 6+
: "verify" // ESLint 5-
const verify = Linter.prototype[verifyMethodName]
// ignore if verify function is already been patched sometime before
if (Linter[LINTER_ISPATCHED_PROPERTY_NAME] === true) {
return
}
Linter[LINTER_ISPATCHED_PROPERTY_NAME] = true
Linter.prototype[verifyMethodName] = function (
textOrSourceCode,
config,
filenameOrOptions,
saveState
) {
if (typeof config.extractConfig === "function") {
return verify.call(this, textOrSourceCode, config, filenameOrOptions)
}
const pluginSettings = getSettings(config.settings || {})
const mode = getFileMode(pluginSettings, filenameOrOptions)
if (!mode || typeof textOrSourceCode !== "string") {
return verify.call(
this,
textOrSourceCode,
config,
filenameOrOptions,
saveState
)
}
const extractResult = extract(
textOrSourceCode,
pluginSettings.indent,
mode === "xml",
pluginSettings.isJavaScriptMIMEType
)
const messages = []
if (pluginSettings.reportBadIndent) {
messages.push(
...extractResult.badIndentationLines.map((line) => ({
message: "Bad line indentation.",
line,
column: 1,
ruleId: "(html plugin)",
severity: pluginSettings.reportBadIndent,
}))
)
}
// Save code parts parsed source code so we don't have to parse it twice
const sourceCodes = new WeakMap()
const verifyCodePart = (codePart, { prepare, ignoreRules } = {}) => {
this.defineRule(PREPARE_RULE_NAME, (context) => {
sourceCodes.set(codePart, context.getSourceCode())
return {
Program() {
if (prepare) {
prepare(context)
}
},
}
})
const localMessages = verify.call(
this,
sourceCodes.get(codePart) || String(codePart),
Object.assign({}, config, {
rules: Object.assign(
{ [PREPARE_RULE_NAME]: "error" },
!ignoreRules && config.rules
),
}),
ignoreRules && typeof filenameOrOptions === "object"
? Object.assign({}, filenameOrOptions, {
reportUnusedDisableDirectives: false,
})
: filenameOrOptions,
saveState
)
messages.push(
...remapMessages(localMessages, extractResult.hasBOM, codePart)
)
}
const parserOptions = config.parserOptions || {}
if (parserOptions.sourceType === "module") {
for (const codePart of extractResult.code) {
verifyCodePart(codePart)
}
} else {
verifyWithSharedScopes(extractResult.code, verifyCodePart, parserOptions)
}
messages.sort((ma, mb) => ma.line - mb.line || ma.column - mb.column)
return messages
}
}
function verifyWithSharedScopes(codeParts, verifyCodePart, parserOptions) {
// First pass: collect needed globals and declared globals for each script tags.
const firstPassValues = []
for (const codePart of codeParts) {
verifyCodePart(codePart, {
prepare(context) {
const globalScope = context.getScope()
// See https://github.com/eslint/eslint/blob/4b267a5c8a42477bb2384f33b20083ff17ad578c/lib/rules/no-redeclare.js#L67-L78
let scopeForDeclaredGlobals
if (
parserOptions.ecmaFeatures &&
parserOptions.ecmaFeatures.globalReturn
) {
scopeForDeclaredGlobals = globalScope.childScopes[0]
} else {
scopeForDeclaredGlobals = globalScope
}
firstPassValues.push({
codePart,
exportedGlobals: globalScope.through.map(
(node) => node.identifier.name
),
declaredGlobals: scopeForDeclaredGlobals.variables.map(
(variable) => variable.name
),
})
},
ignoreRules: true,
})
}
// Second pass: declare variables for each script scope, then run eslint.
for (let i = 0; i < firstPassValues.length; i += 1) {
verifyCodePart(firstPassValues[i].codePart, {
prepare(context) {
const exportedGlobals = splatSet(
firstPassValues
.slice(i + 1)
.map((nextValues) => nextValues.exportedGlobals)
)
for (const name of exportedGlobals) context.markVariableAsUsed(name)
const declaredGlobals = splatSet(
firstPassValues
.slice(0, i)
.map((previousValues) => previousValues.declaredGlobals)
)
const scope = context.getScope()
scope.through = scope.through.filter((variable) => {
return !declaredGlobals.has(variable.identifier.name)
})
},
})
}
}
function remapMessages(messages, hasBOM, codePart) {
const newMessages = []
for (const message of messages) {
if (remapMessage(message, hasBOM, codePart)) {
newMessages.push(message)
}
}
return newMessages
}
function remapMessage(message, hasBOM, codePart) {
if (!message.line || !message.column) {
// Some messages apply to the whole file instead of a particular code location. In particular:
// * @typescript-eslint/parser may send messages with no line/column
// * eslint-plugin-eslint-comments send messages with column=0 to bypass ESLint ignore comments.
// See https://github.com/BenoitZugmeyer/eslint-plugin-html/issues/70
// For now, just include them in the output. In the future, we should make sure those messages
// are not print twice.
return true
}
const location = codePart.originalLocation({
line: message.line,
column: message.column,
})
// Ignore messages if they were in transformed code
if (!location) {
return false
}
Object.assign(message, location)
message.source = codePart.getOriginalLine(location.line)
// Map fix range
if (message.fix && message.fix.range) {
const bomOffset = hasBOM ? -1 : 0
message.fix.range = [
codePart.originalIndex(message.fix.range[0]) + bomOffset,
// The range end is exclusive, meaning it should replace all characters with indexes from
// start to end - 1. We have to get the original index of the last targeted character.
codePart.originalIndex(message.fix.range[1] - 1) + 1 + bomOffset,
]
}
// Map end location
if (message.endLine && message.endColumn) {
const endLocation = codePart.originalLocation({
line: message.endLine,
column: message.endColumn,
})
if (endLocation) {
message.endLine = endLocation.line
message.endColumn = endLocation.column
}
}
return true
}