chore(version-info): disable remote requests when offline

lib/versions/is-online.js

@@ -0,0 +1,7 @@
+"use strict";
+
+var isOnlineAsync = require('is-online');
+
+isOnlineAsync(function(err, isOnline) {
+  console.log(isOnline ? 'online' : 'offline');
+});

lib/versions/version-info.js

@@ -1,13 +1,16 @@
 'use strict';
 
+var childProcess = require('child_process');
 var fs = require('fs');
 var path = require('path');
 var shell = require('shelljs');
 var semver = require('semver');
 var _ = require('lodash');
 
 var currentPackage, previousVersions, cdnVersion, gitRepoInfo;
-
+var connectivityStatus = childProcess.execSync('node is-online.js', { cwd: __dirname, encoding: 'utf8' }).trim();
+var isOnline = connectivityStatus == 'online';
+console.log('Running ' + connectivityStatus);
 
 /**
  * Load information about this project from the package.json
@@ -100,58 +103,68 @@ var getPreviousVersions =  function() {
   // not contain all commits when cloned with git clone --depth=...
   // Needed e.g. for Travis
   var repo_url = currentPackage.repository.url;
-  var tagResults = shell.exec('git ls-remote --tags ' + repo_url,
-                              {silent: true});
-  if (tagResults.code === 0) {
-    return _(tagResults.output.match(/v[0-9].*[0-9]$/mg))
-      .map(function(tag) {
-        var version = semver.parse(tag);
-        return version;
-      })
-      .filter()
-      .map(function(version) {
-        // angular.js didn't follow semantic version until 1.20rc1
-        if ((version.major === 1 && version.minor === 0 && version.prerelease.length > 0) || (version.major === 1 && version.minor === 2 && version.prerelease[0] === 'rc1')) {
-          version.version = [version.major, version.minor, version.patch].join('.') + version.prerelease.join('');
-          version.raw = 'v' + version.version;
-        }
-        version.docsUrl = 'http://code.angularjs.org/' + version.version + '/docs';
-        // Versions before 1.0.2 had a different docs folder name
-        if (version.major < 1 || (version.major === 1 && version.minor === 0 && version.patch < 2)) {
-          version.docsUrl += '-' + version.version;
-          version.isOldDocsUrl = true;
-        }
-        return version;
-      })
-      .sort(semver.compare)
-      .value();
+  if (isOnline) {
+    console.log('looking up remote git tags...');
+    var tagResults = shell.exec('git ls-remote --tags ' + repo_url,
+                                {silent: true});
+    if (tagResults.code === 0) {
+      return _(tagResults.output.match(/v[0-9].*[0-9]$/mg))
+        .map(function(tag) {
+          var version = semver.parse(tag);
+          return version;
+        })
+        .filter()
+        .map(function(version) {
+          // angular.js didn't follow semantic version until 1.20rc1
+          if ((version.major === 1 && version.minor === 0 && version.prerelease.length > 0) || (version.major === 1 && version.minor === 2 && version.prerelease[0] === 'rc1')) {
+            version.version = [version.major, version.minor, version.patch].join('.') + version.prerelease.join('');
+            version.raw = 'v' + version.version;
+          }
+          version.docsUrl = 'http://code.angularjs.org/' + version.version + '/docs';
+          // Versions before 1.0.2 had a different docs folder name
+          if (version.major < 1 || (version.major === 1 && version.minor === 0 && version.patch < 2)) {
+            version.docsUrl += '-' + version.version;
+            version.isOldDocsUrl = true;
+          }
+          return version;
+        })
+        .sort(semver.compare)
+        .value();
+    }
   } else {
-    return [];
+    console.log('-- skipping remote git tag lookup');
   }
+  return [];
 };
 
 var getCdnVersion = function() {
-  return _(previousVersions)
-    .filter(function(tag) {
-      return semver.satisfies(tag, currentPackage.branchVersion);
-    })
-    .reverse()
-    .reduce(function(cdnVersion, version) {
-      if (!cdnVersion) {
-        // Note: need to use shell.exec and curl here
-        // as version-infos returns its result synchronously...
-        var cdnResult = shell.exec('curl http://ajax.googleapis.com/ajax/libs/angularjs/' + version + '/angular.min.js ' +
-                  '--head --write-out "%{http_code}" -o /dev/null -silent',
-                                    {silent: true});
-        if (cdnResult.code === 0) {
-          var statusCode = cdnResult.output.trim();
-          if (statusCode === '200') {
-            cdnVersion = version;
+  if (isOnline) {
+    console.log('searching for CDN versions...');
+    return _(previousVersions)
+      .filter(function(tag) {
+        return semver.satisfies(tag, currentPackage.branchVersion);
+      })
+      .reverse()
+      .reduce(function(cdnVersion, version) {
+        if (!cdnVersion) {
+          // Note: need to use shell.exec and curl here
+          // as version-infos returns its result synchronously...
+          var cdnResult = shell.exec('curl http://ajax.googleapis.com/ajax/libs/angularjs/' + version + '/angular.min.js ' +
+                    '--head --write-out "%{http_code}" -o /dev/null -silent',
+                                      {silent: true});
+          if (cdnResult.code === 0) {
+            var statusCode = cdnResult.output.trim();
+            if (statusCode === '200') {
+              console.log('-- found CDN version ' + version);
+              cdnVersion = version;
+            }
           }
         }
-      }
-      return cdnVersion;
-    }, null);
+        return cdnVersion;
+      }, null);
+  } else {
+    console.log('-- skipping CDN version lookup');
+  }
 };
 
 /**
@@ -198,7 +211,6 @@ var getSnapshotVersion = function() {
   return version;
 };
 
-
 exports.currentPackage = currentPackage = getPackage();
 exports.gitRepoInfo = gitRepoInfo = getGitRepoInfo();
 exports.previousVersions = previousVersions = getPreviousVersions();