feat: case-insensitive scope grouping in changelog and filtering

Normalize scope names to lowercase when grouping commits in the
changelog and when matching include_scopes/ignore_scopes filters.
Scopes like Login, login, and LOGIN are now treated as the same
scope. The display uses the casing from the first commit seen.

Closes #52

Author: xotahal

lib/fastlane/plugin/semantic_release/actions/conventional_changelog.rb

@@ -84,15 +84,16 @@ def self.note_builder(format, commits, version, commit_url, params)
 
       def self.build_scope_lines(type_commits, format, commit_url, params)
         result = ""
-        grouped = type_commits.group_by { |commit| commit[:scope] }
+        grouped = type_commits.group_by { |commit| commit[:scope]&.downcase }
 
         grouped.each do |scope, scope_commits|
           if scope.nil? || scope_commits.length == 1
             scope_commits.each do |commit|
               result += build_commit_line("-", commit, format, commit_url, params, include_scope: true)
             end
           else
-            result += "- #{style_text("#{scope}:", format, 'bold')}\n"
+            display_scope = scope_commits.first[:scope]
+            result += "- #{style_text("#{display_scope}:", format, 'bold')}\n"
             scope_commits.each do |commit|
               result += build_commit_line("  -", commit, format, commit_url, params, include_scope: false)
             end

lib/fastlane/plugin/semantic_release/helper/semantic_release_helper.rb

@@ -25,9 +25,9 @@ def self.git_log(params)
       end
 
       def self.should_exclude_commit(params)
-        commit_scope = params[:commit_scope]
-        scopes_to_include = params[:include_scopes]
-        scopes_to_ignore = params[:ignore_scopes]
+        commit_scope = params[:commit_scope]&.downcase
+        scopes_to_include = params[:include_scopes].map(&:downcase)
+        scopes_to_ignore = params[:ignore_scopes].map(&:downcase)
 
         return !scopes_to_include.include?(commit_scope) unless scopes_to_include.empty?
         return scopes_to_ignore.include?(commit_scope) unless commit_scope.nil?

spec/conventional_changelog_spec.rb

@@ -395,6 +395,33 @@ def execute_lane_test_no_links_slack
       end
     end
 
+    describe 'case-insensitive scope grouping' do
+      commits = [
+        "feat(Login): add biometric auth||long_hash|short_hash|Jiri Otahal|time",
+        "fix(login): fix session timeout||long_hash|short_hash|Jiri Otahal|time",
+        "feat(LOGIN): add SSO support||long_hash|short_hash|Jiri Otahal|time"
+      ]
+
+      it "should group scopes case-insensitively in markdown format" do
+        allow(Fastlane::Actions::ConventionalChangelogAction).to receive(:get_commits_from_hash).and_return(commits)
+        allow(Date).to receive(:today).and_return(Date.new(2019, 5, 25))
+
+        result = [
+          "# 1.0.2 (2019-05-25)",
+          "",
+          "### Features",
+          "- **Login:**",
+          "  - add biometric auth ([short_hash](/long_hash))",
+          "  - add SSO support ([short_hash](/long_hash))",
+          "",
+          "### Bug fixes",
+          "- **login:** fix session timeout ([short_hash](/long_hash))"
+        ].join("\n")
+
+        expect(execute_lane_test).to eq(result)
+      end
+    end
+
     describe 'revert commits in changelog' do
       it "should display reverted fix under Bug fixes section" do
         commits = [