From 3e7685e7ff9ea5b334b9ffa00b99ef4f0532a315 Mon Sep 17 00:00:00 2001
From: Peter Bittner <peter.bittner@vshn.ch>
Date: Tue, 11 Aug 2020 09:36:26 +0200
Subject: [PATCH] Reduce visual complexity by early exit instead of indentation

Align implementation for GitHub PRs and GitLab MRs
---
 lib/modulesync/pr/github.rb | 35 ++++++++++++++++-------------
 lib/modulesync/pr/gitlab.rb | 44 +++++++++++++++++++------------------
 2 files changed, 43 insertions(+), 36 deletions(-)

diff --git a/lib/modulesync/pr/github.rb b/lib/modulesync/pr/github.rb
index 2791c060..2fd64041 100644
--- a/lib/modulesync/pr/github.rb
+++ b/lib/modulesync/pr/github.rb
@@ -22,23 +22,28 @@ def manage(namespace, module_name, options)
           $stdout.puts \
             "Using no-op. Would submit PR '#{options[:pr_title]}' to #{repo_path} " \
             "- merges #{options[:branch]} into #{target_branch}"
-        else
-          pull_requests = @api.pull_requests(repo_path, :state => 'open', :base => target_branch, :head => head)
-          if pull_requests.empty?
-            pr = @api.create_pull_request(repo_path,
-                                          target_branch,
-                                          options[:branch],
-                                          options[:pr_title],
-                                          options[:message])
-            $stdout.puts \
-              "Submitted PR '#{options[:pr_title]}' to #{repo_path} "\
-              "- merges #{options[:branch]} into #{target_branch}"
-          else
-            # Skip creating the PR if it exists already.
-            $stdout.puts "Skipped! #{pull_requests.length} PRs found for branch #{options[:branch]}"
-          end
+          return
+        end
+
+        pull_requests = @api.pull_requests(repo_path,
+                                           :state => 'open',
+                                           :base => target_branch,
+                                           :head => head)
+        unless pull_requests.empty?
+          # Skip creating the PR if it exists already.
+          $stdout.puts "Skipped! #{pull_requests.length} PRs found for branch #{options[:branch]}"
+          return
         end
 
+        pr = @api.create_pull_request(repo_path,
+                                      target_branch,
+                                      options[:branch],
+                                      options[:pr_title],
+                                      options[:message])
+        $stdout.puts \
+          "Submitted PR '#{options[:pr_title]}' to #{repo_path} "\
+          "- merges #{options[:branch]} into #{target_branch}"
+
         # PR labels can either be a list in the YAML file or they can pass in a comma
         # separated list via the command line argument.
         pr_labels = ModuleSync::Util.parse_list(options[:pr_labels])
diff --git a/lib/modulesync/pr/gitlab.rb b/lib/modulesync/pr/gitlab.rb
index 4a7b067c..597c9ff6 100644
--- a/lib/modulesync/pr/gitlab.rb
+++ b/lib/modulesync/pr/gitlab.rb
@@ -15,7 +15,6 @@ def initialize(token, endpoint)
 
       def manage(namespace, module_name, options)
         repo_path = File.join(namespace, module_name)
-
         head = "#{namespace}:#{options[:branch]}"
         target_branch = options[:pr_target_branch] || 'master'
 
@@ -23,27 +22,30 @@ def manage(namespace, module_name, options)
           $stdout.puts \
             "Using no-op. Would submit MR '#{options[:pr_title]}' to #{repo_path} " \
             "- merges #{options[:branch]} into #{target_branch}"
-        else
-          merge_requests = @api.merge_requests(repo_path,
-                                               :state => 'opened',
-                                               :source_branch => head,
-                                               :target_branch => target_branch)
-          if merge_requests.empty?
-            mr_labels = ModuleSync::Util.parse_list(options[:pr_labels])
-            mr = @api.create_merge_request(repo_path, options[:pr_title],
-                                           :source_branch => options[:branch],
-                                           :target_branch => target_branch,
-                                           :labels => mr_labels)
-            $stdout.puts \
-              "Submitted MR '#{options[:pr_title]}' to #{repo_path} " \
-              "- merges #{options[:branch]} into #{target_branch}"
-            return if mr_labels.empty?
-            $stdout.puts "Attached the following labels to MR #{mr.iid}: #{mr_labels.join(', ')}"
-          else
-            # Skip creating the MR if it exists already.
-            $stdout.puts "Skipped! #{merge_requests.length} MRs found for branch #{options[:branch]}"
-          end
+          return
+        end
+
+        merge_requests = @api.merge_requests(repo_path,
+                                             :state => 'opened',
+                                             :source_branch => head,
+                                             :target_branch => target_branch)
+        unless merge_requests.empty?
+          # Skip creating the MR if it exists already.
+          $stdout.puts "Skipped! #{merge_requests.length} MRs found for branch #{options[:branch]}"
+          return
         end
+
+        mr_labels = ModuleSync::Util.parse_list(options[:pr_labels])
+        mr = @api.create_merge_request(repo_path,
+                                       options[:pr_title],
+                                       :source_branch => options[:branch],
+                                       :target_branch => target_branch,
+                                       :labels => mr_labels)
+        $stdout.puts \
+          "Submitted MR '#{options[:pr_title]}' to #{repo_path} " \
+          "- merges #{options[:branch]} into #{target_branch}"
+        return if mr_labels.empty?
+        $stdout.puts "Attached the following labels to MR #{mr.iid}: #{mr_labels.join(', ')}"
       end
     end
   end