Version 1

[yaffs-website] / node_modules / phantomjs-prebuilt / lib / util.js

diff --git a/node_modules/phantomjs-prebuilt/lib/util.js b/node_modules/phantomjs-prebuilt/lib/util.js
new file mode 100644 (file)
index 0000000..7a3c17d
--- /dev/null
+++ b/node_modules/phantomjs-prebuilt/lib/util.js
@@ -0,0 +1,161 @@
+/**
+ * @fileoverview Package-private helpers for the installer.
+ */
+
+'use strict'
+
+var cp = require('child_process')
+var fs = require('fs-extra')
+var hasha = require('hasha')
+var helper = require('./phantomjs')
+var kew = require('kew')
+var path = require('path')
+
+var DEFAULT_CDN = 'https://github.com/Medium/phantomjs/releases/download/v2.1.1'
+var libPath = __dirname
+
+/**
+ * Given a lib/location file of a PhantomJS previously installed with NPM,
+ * is there a valid PhantomJS binary at this lib/location.
+ * @return {Promise<string>} resolved location of phantomjs binary on success
+ */
+function findValidPhantomJsBinary(libPath) {
+  return kew.fcall(function () {
+    var libModule = require(libPath)
+    if (libModule.location &&
+        getTargetPlatform() == libModule.platform &&
+        getTargetArch() == libModule.arch) {
+      var resolvedLocation = path.resolve(path.dirname(libPath), libModule.location)
+      if (fs.statSync(resolvedLocation)) {
+        return checkPhantomjsVersion(resolvedLocation).then(function (matches) {
+          if (matches) {
+            return kew.resolve(resolvedLocation)
+          }
+        })
+      }
+    }
+    return false
+  }).fail(function () {
+    return false
+  })
+}
+
+/**
+ * Check to make sure a given binary is the right version.
+ * @return {kew.Promise.<boolean>}
+ */
+function checkPhantomjsVersion(phantomPath) {
+  console.log('Found PhantomJS at', phantomPath, '...verifying')
+  return kew.nfcall(cp.execFile, phantomPath, ['--version']).then(function (stdout) {
+    var version = stdout.trim()
+    if (helper.version == version) {
+      return true
+    } else {
+      console.log('PhantomJS detected, but wrong version', stdout.trim(), '@', phantomPath + '.')
+      return false
+    }
+  }).fail(function (err) {
+    console.error('Error verifying phantomjs, continuing', err)
+    return false
+  })
+}
+
+/**
+ * Writes the location file with location and platform/arch metadata about the
+ * binary.
+ */
+function writeLocationFile(location) {
+  console.log('Writing location.js file')
+  if (getTargetPlatform() === 'win32') {
+    location = location.replace(/\\/g, '\\\\')
+  }
+
+  var platform = getTargetPlatform()
+  var arch = getTargetArch()
+
+  var contents = 'module.exports.location = "' + location + '"\n'
+
+  if (/^[a-zA-Z0-9]*$/.test(platform) && /^[a-zA-Z0-9]*$/.test(arch)) {
+    contents +=
+        'module.exports.platform = "' + getTargetPlatform() + '"\n' +
+        'module.exports.arch = "' + getTargetArch() + '"\n'
+  }
+
+  fs.writeFileSync(path.join(libPath, 'location.js'), contents)
+}
+
+/**
+ * @return {?{url: string, checksum: string}} Get the download URL and expected
+ *     SHA-256 checksum for phantomjs.  May return null if no download url exists.
+ */
+function getDownloadSpec() {
+  var cdnUrl = process.env.npm_config_phantomjs_cdnurl ||
+      process.env.PHANTOMJS_CDNURL ||
+      DEFAULT_CDN
+  var downloadUrl = cdnUrl + '/phantomjs-' + helper.version + '-'
+  var checksum = ''
+
+  var platform = getTargetPlatform()
+  var arch = getTargetArch()
+  if (platform === 'linux' && arch === 'x64') {
+    downloadUrl += 'linux-x86_64.tar.bz2'
+    checksum = '86dd9a4bf4aee45f1a84c9f61cf1947c1d6dce9b9e8d2a907105da7852460d2f'
+  } else if (platform === 'linux' && arch == 'ia32') {
+    downloadUrl += 'linux-i686.tar.bz2'
+    checksum = '80e03cfeb22cc4dfe4e73b68ab81c9fdd7c78968cfd5358e6af33960464f15e3'
+  } else if (platform === 'darwin') {
+    downloadUrl += 'macosx.zip'
+    checksum = '538cf488219ab27e309eafc629e2bcee9976990fe90b1ec334f541779150f8c1'
+  } else if (platform === 'win32') {
+    downloadUrl += 'windows.zip'
+    checksum = 'd9fb05623d6b26d3654d008eab3adafd1f6350433dfd16138c46161f42c7dcc8'
+  } else {
+    return null
+  }
+  return {url: downloadUrl, checksum: checksum}
+}
+
+/**
+ * Check to make sure that the file matches the checksum.
+ * @param {string} fileName
+ * @param {string} checksum
+ * @return {Promise.<boolean>}
+ */
+function verifyChecksum(fileName, checksum) {
+  return kew.resolve(hasha.fromFile(fileName, {algorithm: 'sha256'})).then(function (hash) {
+    var result = checksum == hash
+    if (result) {
+      console.log('Verified checksum of previously downloaded file')
+    } else {
+      console.log('Checksum did not match')
+    }
+    return result
+  }).fail(function (err) {
+    console.error('Failed to verify checksum: ', err)
+    return false
+  })
+}
+
+/**
+ * @return {string}
+ */
+function getTargetPlatform() {
+  return process.env.PHANTOMJS_PLATFORM || process.platform
+}
+
+/**
+ * @return {string}
+ */
+function getTargetArch() {
+  return process.env.PHANTOMJS_ARCH || process.arch
+}
+
+module.exports = {
+  checkPhantomjsVersion: checkPhantomjsVersion,
+  getDownloadSpec: getDownloadSpec,
+  getTargetPlatform: getTargetPlatform,
+  getTargetArch: getTargetArch,
+  findValidPhantomJsBinary: findValidPhantomJsBinary,
+  verifyChecksum: verifyChecksum,
+  writeLocationFile: writeLocationFile
+}