Initial commit

.editorconfig

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+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

.gitignore

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+.DS_Store
+*.log
+.nyc_output/
+coverage/
+node_modules/
+yarn.lock

.npmrc

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+package-lock=false

.prettierignore

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+coverage/

.travis.yml

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+language: node_js
+node_js:
+  - lts/dubnium
+  - node
+after_success: bash <(curl -s https://codecov.io/bash)

build.js

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+'use strict'
+
+var fs = require('fs')
+var path = require('path')
+var fetch = require('node-fetch')
+var fromXml = require('xast-util-from-xml')
+var visit = require('unist-util-visit')
+var normalize = require('bcp-47/lib/normalize')
+
+var own = {}.hasOwnProperty
+
+var endpoint =
+  'https://raw.githubusercontent.com/unicode-org/cldr/master/common/supplemental/supplementalMetadata.xml'
+
+fetch(endpoint)
+  .then(res => res.text())
+  .then(onbody, console.error)
+
+function onbody(doc) {
+  var fields = []
+  var match = []
+  var defaults = []
+  var many = {}
+  var suffix = 'Alias'
+  var seenHeploc = false
+  var ignore = [
+    // Subdivisions (ISO 3166-2) are not used in BCP 47 tags.
+    'subdivision',
+    // Timezones.
+    'zone'
+  ]
+
+  visit(fromXml(doc), 'element', onelement)
+
+  write('defaults', defaults)
+  write('fields', fields)
+  write('many', many)
+  write('matches', match)
+
+  /* eslint-disable-next-line complexity */
+  function onelement(node) {
+    var name = node.name
+    var pos = name.indexOf(suffix)
+    var from
+    var to
+
+    if (name === 'defaultContent') {
+      defaults = defaults.concat(clean(node.attributes.locales))
+    }
+
+    if (pos === -1) {
+      return
+    }
+
+    name = name.slice(0, pos)
+
+    if (name === 'territory') {
+      name = 'region'
+    }
+
+    if (name === 'variant') {
+      name = 'variants'
+    }
+
+    if (ignore.includes(name)) {
+      return
+    }
+
+    from = clean(node.attributes.type)
+    to = clean(node.attributes.replacement)
+
+    if (from.length === 1) {
+      from = from[0]
+    } else {
+      throw new Error('Cannot map from many: ' + from)
+    }
+
+    if (to.length === 1) {
+      to = to[0]
+    } else {
+      if (!many[name]) {
+        many[name] = {}
+      }
+
+      many[name][from] = to
+      return
+    }
+
+    if (name === 'region' && from.length === 3 && isNaN(from)) {
+      console.log(
+        'ISO 3166-1 alpha 3 codes cannot be represented in BCP 47: %s',
+        from
+      )
+      return
+    }
+
+    if (name === 'language') {
+      if (own.call(normalize, from)) {
+        console.warn('Ignoring normalized value: %s -> %s', from, to)
+        return
+      }
+
+      match.push({from, to})
+    } else if (name === 'variants') {
+      if (from === 'aaland' && to === 'ax') {
+        fields.push({
+          from: {field: name, value: from},
+          to: {field: 'region', value: to}
+        })
+      } else if (from === 'heploc' && to === 'alalc97') {
+        if (seenHeploc) {
+          console.warn('Ignoring double heploc alias')
+          return
+        }
+
+        seenHeploc = true
+        fields.push({
+          from: {field: name, value: from},
+          to: {field: name, value: to}
+        })
+      } else if (from === 'polytoni' && to === 'polyton') {
+        fields.push({
+          from: {field: name, value: from},
+          to: {field: name, value: to}
+        })
+      } else if (
+        (from === 'arevela' && to === 'hy') ||
+        (from === 'arevmda' && to === 'hyw')
+      ) {
+        fields.push({
+          from: {field: name, value: from},
+          to: {field: 'language', value: to}
+        })
+      } else {
+        console.warn('Ignoring unknown variant alias', from, to)
+      }
+    } else {
+      fields.push({
+        from: {field: name, value: from},
+        to: {field: name, value: to}
+      })
+    }
+  }
+}
+
+function clean(value) {
+  return value
+    .toLowerCase()
+    .replace(/_/g, '-')
+    .replace(/\s+/g, ' ')
+    .trim()
+    .split(' ')
+}
+
+function write(name, values) {
+  fs.writeFileSync(
+    path.join('lib', name + '.json'),
+    JSON.stringify(values, null, 2) + '\n'
+  )
+}

funding.yml

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+github: wooorm

index.js

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+'use strict'
+
+module.exports = require('./lib')