first commit

build/node_modules/prebuild-install/util.js

@@ -0,0 +1,94 @@
+var path = require('path')
+var github = require('github-from-package')
+var home = require('os-homedir')
+var expandTemplate = require('expand-template')()
+
+function getDownloadUrl (opts) {
+  var pkgName = opts.pkg.name.replace(/^@\w+\//, '')
+  return expandTemplate(urlTemplate(opts), {
+    name: pkgName,
+    package_name: pkgName,
+    version: opts.pkg.version,
+    major: opts.pkg.version.split('.')[0],
+    minor: opts.pkg.version.split('.')[1],
+    patch: opts.pkg.version.split('.')[2],
+    prerelease: opts.pkg.version.split('-')[1],
+    build: opts.pkg.version.split('+')[1],
+    abi: opts.abi || process.versions.modules,
+    node_abi: process.versions.modules,
+    runtime: opts.runtime || 'node',
+    platform: opts.platform,
+    arch: opts.arch,
+    libc: opts.libc || process.env.LIBC || '',
+    configuration: (opts.debug ? 'Debug' : 'Release'),
+    module_name: opts.pkg.binary && opts.pkg.binary.module_name
+  })
+}
+
+function urlTemplate (opts) {
+  if (typeof opts.download === 'string') {
+    return opts.download
+  }
+
+  var packageName = '{name}-v{version}-{runtime}-v{abi}-{platform}{libc}-{arch}.tar.gz'
+  var hostMirrorUrl = getHostMirrorUrl(opts)
+
+  if (hostMirrorUrl) {
+    return hostMirrorUrl + '/v{version}/' + packageName
+  }
+
+  if (opts.pkg.binary) {
+    return [
+      opts.pkg.binary.host,
+      opts.pkg.binary.remote_path,
+      opts.pkg.binary.package_name || packageName
+    ].map(function (path) {
+      return trimSlashes(path)
+    }).filter(Boolean).join('/')
+  }
+
+  return github(opts.pkg) + '/releases/download/v{version}/' + packageName
+}
+
+function getHostMirrorUrl (opts) {
+  var propName = 'npm_config_' + opts.pkg.name + '_binary_host'
+  return process.env[propName] || process.env[propName + '_mirror']
+}
+
+function trimSlashes (str) {
+  if (str) return str.replace(/^\.\/|^\/|\/$/g, '')
+}
+
+function cachedPrebuild (url) {
+  return path.join(prebuildCache(), url.replace(/[^a-zA-Z0-9.]+/g, '-'))
+}
+
+function npmCache () {
+  var env = process.env
+  return env.npm_config_cache || (env.APPDATA ? path.join(env.APPDATA, 'npm-cache') : path.join(home(), '.npm'))
+}
+
+function prebuildCache () {
+  return path.join(npmCache(), '_prebuilds')
+}
+
+function tempFile (cached) {
+  return cached + '.' + process.pid + '-' + Math.random().toString(16).slice(2) + '.tmp'
+}
+
+function localPrebuild (url) {
+  return path.join('prebuilds', path.basename(url))
+}
+
+function isYarnPath (execPath) {
+  return execPath ? /^yarn/.test(path.basename(execPath)) : false
+}
+
+exports.getDownloadUrl = getDownloadUrl
+exports.urlTemplate = urlTemplate
+exports.cachedPrebuild = cachedPrebuild
+exports.localPrebuild = localPrebuild
+exports.prebuildCache = prebuildCache
+exports.npmCache = npmCache
+exports.tempFile = tempFile
+exports.isYarnPath = isYarnPath