Merge pull request #24 from KyleFin/addDeleteBranchCommand

Add a Teardown command

lib/git_chain/commands.rb

@@ -8,6 +8,7 @@ module Commands
     autoload :Prune, "git_chain/commands/prune"
     autoload :Push, "git_chain/commands/push"
     autoload :Setup, "git_chain/commands/setup"
+    autoload :Teardown, "git_chain/commands/teardown"
 
     ArgError = Class.new(ArgumentError)
 

lib/git_chain/commands/teardown.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+require "optparse"
+
+module GitChain
+  module Commands
+    class Teardown < Command
+      include Options::ChainName
+
+      def description
+        "Teardown chain"
+      end
+
+      def run(options)
+        if Git.rebase_in_progress?
+          raise(Abort, "A rebase is in progress. Please finish the rebase first and run 'git chain rebase' after.")
+        end
+
+        chain = current_chain(options)
+
+        puts_debug("Tearing down chain #{chain.formatted}}}")
+
+        chain.branch_names.each do |b|
+          Git.set_config("branch.#{b}.chain", nil, scope: :local)
+          Git.set_config("branch.#{b}.parentBranch", nil, scope: :local)
+          Git.set_config("branch.#{b}.branchPoint", nil, scope: :local)
+        end
+
+        puts_success("Removed chain #{chain.formatted}")
+      end
+    end
+  end
+end

test/git_chain/command/teardown_test.rb

@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+require "test_helper"
+
+module GitChain
+  module Commands
+    class TeardownTest < MiniTest::Test
+      include RepositoryTestHelper
+
+      def test_tearing_down_a_clean_chain
+        capture_io do
+          with_test_repository("a-b-chain") do
+            assert_equal(%w(master a b), Models::Chain.from_config("default").branch_names)
+
+            Teardown.new.call
+
+            assert(Models::Chain.from_config("default").empty?)
+          end
+        end
+      end
+
+      def test_rebase_in_progress
+        capture_io do
+          with_test_repository("a-b-conflicts") do
+            %x(git rebase --onto a b^ b)
+            exception = assert_raises(Abort) do
+              Teardown.new.call
+            end
+
+            assert_match(/rebase is in progress/, exception.message)
+          end
+        end
+      end
+    end
+  end
+end