Add --exclude-pods option for pod update command

Allows to skip the update operation for specific pods
E.g.: pod update --exclude-pods=Alamofire will update all
installed pods from the lockfile except Alamofire

CHANGELOG.md

@@ -8,6 +8,11 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
 
 ##### Enhancements
 
+
+* Add `--exclude-pods` option to `pod update` to allow excluding specific pods from update  
+  [Oleksandr Kruk](https://github.com/0mega)
+  [#7334](https://github.com/CocoaPods/CocoaPods/issues/7334)
+
 * Improve `pod install` performance for pods with exact file paths rather than glob patterns  
   [Muhammed Yavuz Nuzumlalı](https://github.com/manuyavuz)
   [#7473](https://github.com/CocoaPods/CocoaPods/pull/7473)

lib/cocoapods/command/update.rb

@@ -23,6 +23,7 @@ module Pod
         [
           ['--sources=https://github.com/artsy/Specs,master', 'The sources from which to update dependent pods. ' \
            'Multiple sources must be comma-delimited. The master repo will not be included by default with this option.'],
+          ['--exclude-pods=podName', 'Pods to exclude during update. Multiple pods must be comma-delimited.'],
         ].concat(super)
       end
 
@@ -30,6 +31,7 @@ module Pod
         @pods = argv.arguments! unless argv.arguments.empty?
 
         source_urls = argv.option('sources', '').split(',')
+        excluded_pods = argv.option('exclude-pods', '').split(',')
         unless source_urls.empty?
           source_pods = source_urls.flat_map { |url| config.sources_manager.source_with_name_or_url(url).pods }
           unless source_pods.empty?
@@ -42,6 +44,20 @@ module Pod
           end
         end
 
+        unless excluded_pods.empty?
+          @pods ||= config.lockfile.pod_names.dup
+
+          non_installed_pods = (excluded_pods - @pods)
+          unless non_installed_pods.empty?
+            pluralized_words = non_installed_pods.length > 1 ? %w(Pods are) : %w(Pod is)
+            message = "Trying to skip `#{non_installed_pods.join('`, `')}` #{pluralized_words.first} " \
+                    "which #{pluralized_words.last} not installed"
+            raise Informative, message
+          end
+
+          @pods.delete_if { |pod| excluded_pods.include?(pod) }
+        end
+
         super
       end
 

spec/functional/command/update_spec.rb

@@ -15,6 +15,8 @@ module Pod
         File.open(file, 'w') do |f|
           f.puts('platform :ios')
           f.puts('pod "BananaLib", "1.0"')
+          f.puts('pod "CoconutLib", "1.0"')
+          f.puts('pod "OCMock", "3.4"')
         end
       end
 
@@ -22,12 +24,22 @@ module Pod
         podfile = Podfile.new do
           platform :ios
           pod 'BananaLib', '1.0'
+          pod 'CoconutLib', '1.0'
+          pod 'OCMock', '3.4'
         end
         specs = [
           Specification.new do |s|
             s.name = 'BananaLib'
             s.version = '1.0'
           end,
+          Specification.new do |s|
+            s.name = 'CoconutLib'
+            s.version = '2.0'
+          end,
+          Specification.new do |s|
+            s.name = 'OCMock'
+            s.version = '3.4'
+          end,
         ]
         external_sources = {}
         specs_by_source = {
@@ -90,7 +102,7 @@ module Pod
           end
 
           it 'updates pods in repo and in lockfile' do
-            Installer.any_instance.expects(:update=).with(:pods => ['BananaLib'])
+            Installer.any_instance.expects(:update=).with(:pods => %w(BananaLib CoconutLib OCMock))
             run_command('update', '--sources=master')
           end
         end
@@ -118,6 +130,45 @@ module Pod
           exception.message.should.include 'Pods `Reachability`, `BananaLib2` are not installed and cannot be updated'
         end
       end
+
+      describe 'ignored pods' do
+        before do
+          generate_lockfile
+        end
+
+        describe 'successfully ignores skipped pods' do
+          before do
+            Installer.any_instance.expects(:install!)
+          end
+
+          it 'ignores skiped pod' do
+            Installer.any_instance.expects(:update=).with(:pods => %w(BananaLib CoconutLib))
+            run_command('update', '--exclude-pods=OCMock')
+          end
+
+          it 'ignores multiple skipped pods' do
+            Installer.any_instance.expects(:update=).with(:pods => ['OCMock'])
+            run_command('update', '--exclude-pods=BananaLib,CoconutLib')
+          end
+        end
+
+        describe 'when a single supplied Pod is not installed' do
+          it 'raises with single message' do
+            should.raise Informative do
+              run_command('update', '--exclude-pods=Reachability,BananaLib')
+            end.message.should.include 'Trying to skip `Reachability` Pod which is not installed'
+          end
+        end
+
+        describe 'when multiple supplied Pods are not installed' do
+          it 'raises with plural message' do
+            should.raise Informative do
+              run_command('update', '--exclude-pods=Reachability,Alamofire')
+            end.message.should.include 'Trying to skip `Reachability`, `Alamofire` ' \
+            'Pods which are not installed'
+          end
+        end
+      end
     end
   end
 end