nix: temporarily vendor yarn2nix

nix/yarn2nix/internal/fixup_bin.js

@@ -0,0 +1,53 @@
+#!/usr/bin/env node
+
+/* Usage:
+ * node fixup_bin.js <bin_dir> <modules_dir> [<bin_pkg_1>, <bin_pkg_2> ... ]
+ */
+
+const fs = require('fs')
+const path = require('path')
+
+const derivationBinPath = process.argv[2]
+const nodeModules = process.argv[3]
+const packagesToPublishBin = process.argv.slice(4)
+
+function processPackage(name) {
+  console.log('fixup_bin: Processing ', name)
+
+  const packagePath = `${nodeModules}/${name}`
+  const packageJsonPath = `${packagePath}/package.json`
+  const packageJson = JSON.parse(fs.readFileSync(packageJsonPath))
+
+  if (!packageJson.bin) {
+    console.log('fixup_bin: No binaries provided')
+    return
+  }
+
+  // There are two alternative syntaxes for `bin`
+  // a) just a plain string, in which case the name of the package is the name of the binary.
+  // b) an object, where key is the name of the eventual binary, and the value the path to that binary.
+  if (typeof packageJson.bin === 'string') {
+    const binName = packageJson.bin
+    packageJson.bin = {}
+    packageJson.bin[packageJson.name] = binName
+  }
+
+  // eslint-disable-next-line no-restricted-syntax, guard-for-in
+  for (const binName in packageJson.bin) {
+    const binPath = packageJson.bin[binName]
+    const normalizedBinName = binName.replace('@', '').replace('/', '-')
+
+    const targetPath = path.normalize(`${packagePath}/${binPath}`)
+    const createdPath = `${derivationBinPath}/${normalizedBinName}`
+
+    console.log(
+      `fixup_bin: creating link ${createdPath} that points to ${targetPath}`,
+    )
+
+    fs.symlinkSync(targetPath, createdPath)
+  }
+}
+
+packagesToPublishBin.forEach(pkg => {
+  processPackage(pkg)
+})

nix/yarn2nix/internal/fixup_yarn_lock.js

@@ -0,0 +1,49 @@
+#!/usr/bin/env node
+
+/* Usage:
+ * node fixup_yarn_lock.js yarn.lock
+ */
+
+const fs = require('fs')
+const readline = require('readline')
+
+const urlToName = require('../lib/urlToName')
+
+const yarnLockPath = process.argv[2]
+
+const readFile = readline.createInterface({
+  input: fs.createReadStream(yarnLockPath, { encoding: 'utf8' }),
+
+  // Note: we use the crlfDelay option to recognize all instances of CR LF
+  // ('\r\n') in input.txt as a single line break.
+  crlfDelay: Infinity,
+
+  terminal: false, // input and output should be treated like a TTY
+})
+
+const result = []
+
+readFile
+  .on('line', line => {
+    const arr = line.match(/^ {2}resolved "([^#]+)#([^"]+)"$/)
+
+    if (arr !== null) {
+      const [_, url, shaOrRev] = arr
+
+      const fileName = urlToName(url)
+
+      result.push(`  resolved "${fileName}#${shaOrRev}"`)
+    } else {
+      result.push(line)
+    }
+  })
+  .on('close', () => {
+    fs.writeFile(yarnLockPath, result.join('\n'), 'utf8', err => {
+      if (err) {
+        console.error(
+          'fixup_yarn_lock: fatal error when trying to write to yarn.lock',
+          err,
+        )
+      }
+    })
+  })