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130 lines
4.5 KiB
Plaintext
130 lines
4.5 KiB
Plaintext
/**
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* @author Toru Nagashima
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* See LICENSE file in root directory for full license.
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*/
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"use strict"
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const path = require("path")
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const fs = require("fs")
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const getTryExtensions = require("../util/get-try-extensions")
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const visitImport = require("../util/visit-import")
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const packageNamePattern = /^(?:@[^/\\]+[/\\])?[^/\\]+$/u
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const corePackageOverridePattern = /^(?:assert|async_hooks|buffer|child_process|cluster|console|constants|crypto|dgram|dns|domain|events|fs|http|http2|https|inspector|module|net|os|path|perf_hooks|process|punycode|querystring|readline|repl|stream|string_decoder|sys|timers|tls|trace_events|tty|url|util|v8|vm|worker_threads|zlib)[/\\]$/u
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/**
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* Get all file extensions of the files which have the same basename.
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* @param {string} filePath The path to the original file to check.
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* @returns {string[]} File extensions.
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*/
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function getExistingExtensions(filePath) {
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const basename = path.basename(filePath, path.extname(filePath))
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try {
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return fs
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.readdirSync(path.dirname(filePath))
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.filter(
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filename =>
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path.basename(filename, path.extname(filename)) === basename
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)
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.map(filename => path.extname(filename))
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} catch (_error) {
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return []
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}
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}
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module.exports = {
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meta: {
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docs: {
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description:
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"enforce the style of file extensions in `import` declarations",
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category: "Stylistic Issues",
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recommended: false,
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url:
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"https://github.com/mysticatea/eslint-plugin-node/blob/v11.1.0/docs/rules/file-extension-in-import.md",
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},
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fixable: "code",
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messages: {
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requireExt: "require file extension '{{ext}}'.",
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forbidExt: "forbid file extension '{{ext}}'.",
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},
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schema: [
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{
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enum: ["always", "never"],
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},
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{
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type: "object",
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properties: {
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tryExtensions: getTryExtensions.schema,
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},
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additionalProperties: {
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enum: ["always", "never"],
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},
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},
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],
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type: "suggestion",
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},
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create(context) {
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if (context.getFilename().startsWith("<")) {
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return {}
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}
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const defaultStyle = context.options[0] || "always"
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const overrideStyle = context.options[1] || {}
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function verify({ filePath, name, node }) {
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// Ignore if it's not resolved to a file or it's a bare module.
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if (
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!filePath ||
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packageNamePattern.test(name) ||
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corePackageOverridePattern.test(name)
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) {
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return
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}
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// Get extension.
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const originalExt = path.extname(name)
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const resolvedExt = path.extname(filePath)
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const existingExts = getExistingExtensions(filePath)
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if (!resolvedExt && existingExts.length !== 1) {
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// Ignore if the file extension could not be determined one.
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return
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}
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const ext = resolvedExt || existingExts[0]
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const style = overrideStyle[ext] || defaultStyle
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// Verify.
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if (style === "always" && ext !== originalExt) {
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context.report({
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node,
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messageId: "requireExt",
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data: { ext },
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fix(fixer) {
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if (existingExts.length !== 1) {
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return null
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}
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const index = node.range[1] - 1
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return fixer.insertTextBeforeRange([index, index], ext)
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},
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})
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} else if (style === "never" && ext === originalExt) {
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context.report({
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node,
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messageId: "forbidExt",
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data: { ext },
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fix(fixer) {
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if (existingExts.length !== 1) {
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return null
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}
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const index = name.lastIndexOf(ext)
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const start = node.range[0] + 1 + index
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const end = start + ext.length
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return fixer.removeRange([start, end])
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},
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})
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}
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}
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return visitImport(context, { optionIndex: 1 }, targets => {
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targets.forEach(verify)
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})
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},
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}
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