ParserFile: support values with equals signs

lib/github_changelog_generator/parser_file.rb

@@ -4,33 +4,34 @@ module GitHubChangelogGenerator
       @options = options
     end
 
-    def file
-      File.expand_path(@options[:params_file] || ".github_changelog_generator")
-    end
-
-    def file?
-      File.exist?(file)
-    end
-
-    def file_open
-      File.open(file)
-    end
-
     def parse!
-      return unless file?
-      file_open.each do |line|
-        begin
-          key, value = line.split("=")
-          key_sym = key.sub("-", "_").to_sym
-          value = value.gsub(/[\n\r]+/, "")
-          value = true if value =~ (/^(true|t|yes|y|1)$/i)
-          value = false if value =~ (/^(false|f|no|n|0)$/i)
-          @options[key_sym] = value
-        rescue
-          raise "File #{file} is incorrect in line \"#{line.gsub(/[\n\r]+/, '')}\""
-        end
-      end
-      @options
+      return unless File.exist?(file)
+
+      File.readlines(file).each { |line| parse_line!(line) }
+    end
+
+    private
+
+    def file
+      @file ||= File.expand_path(@options[:params_file] || ".github_changelog_generator")
+    end
+
+    def parse_line!(line)
+      key_sym, value = extract_pair(line)
+      value = true if value =~ (/^(true|t|yes|y|1)$/i)
+      value = false if value =~ (/^(false|f|no|n|0)$/i)
+      @options[key_sym] = value
+    rescue
+      raise "Config file #{file} is incorrect in line \"#{line.gsub(/[\n\r]+/, '')}\""
+    end
+
+    # Returns a the setting as a symbol and its string value sans newlines.
+    #
+    # @param line [String] unparsed line from config file
+    # @return [Array<Symbol, String>]
+    def extract_pair(line)
+      key, value = line.split("=", 2)
+      [key.sub("-", "_").to_sym, value.gsub(/[\n\r]+/, "")]
     end
   end
 end

spec/files/github_changelog_params_override

@@ -1,2 +1,3 @@
 unreleased_label=staging
 unreleased=false
+header==== Changelog ===

spec/unit/parse_file_spec.rb

@@ -10,23 +10,32 @@ describe GitHubChangelogGenerator::ParserFile do
     context "when file is empty" do
       let(:options) { { params_file: "spec/files/github_changelog_params_empty" } }
       let(:parse) { GitHubChangelogGenerator::ParserFile.new(options) }
-      subject { parse.parse! }
-      it { is_expected.to be_a(Hash) }
-      it { is_expected.to eq(options) }
+
+      it "does not change the options" do
+        expect { parse.parse! }.to_not change { options }
+      end
     end
 
     context "when file is incorrect" do
       let(:options) { { params_file: "spec/files/github_changelog_params_incorrect" } }
+      let(:options_before_change) { options.dup }
       let(:parse) { GitHubChangelogGenerator::ParserFile.new(options) }
-      it { expect { fail.raise! }.to raise_error RuntimeError }
+      it { expect { parse.parse! }.to raise_error }
     end
 
     context "when override default values" do
-      let(:options) { { params_file: "spec/files/github_changelog_params_override" }.merge(GitHubChangelogGenerator::Parser.get_default_options) }
+      let(:default_options) { GitHubChangelogGenerator::Parser.get_default_options }
+      let(:options) { { params_file: "spec/files/github_changelog_params_override" }.merge(default_options) }
+      let(:options_before_change) { options.dup }
       let(:parse) { GitHubChangelogGenerator::ParserFile.new(options) }
-      subject { parse.parse! }
-      it { is_expected.to be_a(Hash) }
-      it { is_expected.to eq(options.merge(unreleased_label: "staging", unreleased: false)) }
+
+      it "changes the options" do
+        expect { parse.parse! }.to change { options }
+          .from(options_before_change)
+          .to(options_before_change.merge(unreleased_label: "staging",
+                                          unreleased: false,
+                                          header: "=== Changelog ==="))
+      end
     end
   end
 end