Linting: formatting code to suit RuboCop (#611)

Add option --configure-sections, --add-sections, --include-merged

.rubocop.yml

@@ -80,3 +80,10 @@ Metrics/BlockLength:
 Lint/InterpolationCheck:
   Enabled: false
 
+Style/FormatStringToken:
+  Exclude:
+    - lib/github_changelog_generator/parser.rb
+
+Style/MixinUsage:
+  Exclude:
+    - lib/github_changelog_generator/task.rb

.travis.yml

@@ -17,7 +17,7 @@ matrix:
       after_success: true # This skips 'codeclimate-test-reporter'
     - rvm: 2.3.4
     - rvm: 2.4.1
-    - rvm: jruby-9.1.13.0
+    - rvm: jruby-9.1.15.0
       jdk: oraclejdk8
       env:
         - JRUBY_OPTS=--debug

CHANGELOG.md

@@ -1,4 +1,4 @@
-# Change Log
+# Changelog
 
 ## [v1.15.0-rc](https://github.com/skywinder/github-changelog-generator/tree/v1.15.0-rc) (2017-10-29)
 [Full Changelog](https://github.com/skywinder/github-changelog-generator/compare/v1.15.0.pre.beta...v1.15.0-rc)
@@ -591,7 +591,7 @@
 
 **Implemented enhancements:**
 
-- Parsing of existing Change Log file [\#212](https://github.com/skywinder/github-changelog-generator/issues/212)
+- Parsing of existing Changelog file [\#212](https://github.com/skywinder/github-changelog-generator/issues/212)
 - Warn users about 0 tags in repo. [\#208](https://github.com/skywinder/github-changelog-generator/issues/208)
 - Cleanup [\#220](https://github.com/skywinder/github-changelog-generator/pull/220) ([tuexss](https://github.com/tuexss))
 
@@ -855,4 +855,4 @@
 ## [0.0.1](https://github.com/skywinder/github-changelog-generator/tree/0.0.1) (2014-11-06)
 
 
-\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*
+\* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # How to contribute
 
-Bug reports and pull requests from users is what keeps this project working.
+Bug reports and pull requests from users are what keep this project working.
 
 ## Basics
 
@@ -43,7 +43,7 @@ API documentation is written as [YARD] docblocks in the Ruby code.
 
 This is rendered as Web pages on [Rubydoc.info][github-changelog-generator on Rubydoc.info].
 
-The completeness of the API documentation is measured on [our page on the Inch CI Web site][github-changelog-generator on Inch CI]
+The completeness of the API documentation is measured on [our page on the Inch CI website][github-changelog-generator on Inch CI].
 
 ### man page
 

LICENSE

@@ -1,5 +1,5 @@
 The MIT License (MIT)
-Copyright (c) 2016-2017 Petr Korolev
+Copyright (c) 2016-2018 Petr Korolev
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

README.md

@@ -43,20 +43,20 @@ release (or version) of the project."
 
 ## Installation
 
-    gem install github_changelog_generator
+    $ [sudo] gem install github_changelog_generator
 
 See also Troubleshooting.
 
 ## Running with Docker
 
-    docker run -it --rm -v "$(pwd)":/usr/local/src/your-app skywinder/github-changelog-generator
+    $ docker run -it --rm -v "$(pwd)":/usr/local/src/your-app skywinder/github-changelog-generator
 
 ## Output example
 
 - Look at **[CHANGELOG.md](https://github.com/skywinder/Github-Changelog-Generator/blob/master/CHANGELOG.md)** for this project
 - [ActionSheetPicker-3.0/CHANGELOG.md](https://github.com/skywinder/ActionSheetPicker-3.0/blob/master/CHANGELOG.md)  was generated by command:
 
-      github_changelog_generator -u skywinder -p ActionSheetPicker-3.0
+      $ github_changelog_generator -u skywinder -p ActionSheetPicker-3.0
 
 - In general, it looks like this:
 
@@ -83,19 +83,25 @@ See also Troubleshooting.
 
 -  Run this:
 
-      `github_changelog_generator -u github_username -p github_project`
+	   $ github_changelog_generator -u github_username -p github_project
-      `github_changelog_generator  github_username/github_project`
+	   
+	or, on the 1.14.x (current stable release)
+
+	   $ github_changelog_generator github_username/github_project
+	   
 
 - For Github Enterprise repos, specify *both* `--github-site` and `--github-api` options:
 
-      github_changelog_generator --github-site="https://github.yoursite.com" \
+       $ github_changelog_generator --github-site="https://github.yoursite.com" \
                                   --github-api="https://github.yoursite.com/api/v3/"
 
 This generates a `CHANGELOG.md`, with pretty Markdown formatting.
 
 ### Params
 
-Type `github_changelog_generator --help` for details.
+Print help for all command-line options to learn more details:
+
+    $ github_changelog_generator --help
 
 For more details about params, read the Wiki page: [**Advanced changelog generation examples**](https://github.com/skywinder/github-changelog-generator/wiki/Advanced-change-log-generation-examples)
 
@@ -230,15 +236,15 @@ For example:
 When you find a closed bug, it is very useful to know which release fixed it.
 So that you can easily find the issue by \# in `CHANGELOG.md`.
 
-- it's not quite as easy to find this in handwritten releases notes
+- It's not quite as easy to find this in handwritten releases notes.
-- a generated file saves you the trouble of remembering everything;
+- A generated file saves you the trouble of remembering everything;
-  sometimes people forget to add things to a handwritten file
+  sometimes people forget to add things to a handwritten file.
 
 Ultimately, I think GitHub Releases are ideal for end-users.
 Meanwhile, `CHANGELOG.md` lives right in the repository, with its detailed list of changes, which is handy for developers.
 Finally, there's nothing wrong with using GitHub Releases alongside `CHANGELOG.md` in this combination.
 
-- ***I received a warning: "GitHub API rate limit exceed"  What does this mean?***
+- ***I got an "API rate limit exceeded" error message. What does this mean?***
 
 GitHub [limits the number of API requests](https://developer.github.com/v3/#rate-limiting) you can make in an hour. You can make up to 5,000 requests per hour. For unauthenticated requests, the rate limit is only up to 60 requests per hour. Unauthenticated requests are associated with your IP address (not the user making requests).
 

github_changelog_generator.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |spec|
   spec.version            = GitHubChangelogGenerator::VERSION
   spec.default_executable = "github_changelog_generator"
 
-  spec.required_ruby_version = ">= 1.9.3"
+  spec.required_ruby_version = ">= 2.2.2"
   spec.authors = ["Petr Korolev", "Olle Jonsson"]
   spec.email = "sky4winder+github_changelog_generator@gmail.com"
 

lib/github_changelog_generator/generator/entry.rb

@@ -0,0 +1,237 @@
+require "github_changelog_generator/generator/section"
+
+module GitHubChangelogGenerator
+  # This class generates the content for a single changelog entry. An entry is
+  # generally either for a specific tagged release or the collection of
+  # unreleased changes.
+  #
+  # An entry is comprised of header text followed by a series of sections
+  # relating to the entry.
+  #
+  # @see GitHubChangelogGenerator::Generator
+  # @see GitHubChangelogGenerator::Section
+  class Entry
+    attr_reader :content
+
+    def initialize(options = Options.new({}))
+      @content = ""
+      @options = Options.new(options)
+    end
+
+    # Generates log entry with header and body
+    #
+    # @param [Array] pull_requests List or PR's in new section
+    # @param [Array] issues List of issues in new section
+    # @param [String] newer_tag_name Name of the newer tag. Could be nil for `Unreleased` section.
+    # @param [String] newer_tag_link Name of the newer tag. Could be "HEAD" for `Unreleased` section.
+    # @param [Time] newer_tag_time Time of the newer tag
+    # @param [Hash, nil] older_tag Older tag, used for the links. Could be nil for last tag.
+    # @return [String] Ready and parsed section
+    def create_entry_for_tag(pull_requests, issues, newer_tag_name, newer_tag_link, newer_tag_time, older_tag_name) # rubocop:disable Metrics/ParameterLists
+      github_site = @options[:github_site] || "https://github.com"
+      project_url = "#{github_site}/#{@options[:user]}/#{@options[:project]}"
+
+      set_sections_and_maps
+
+      @content = generate_header(newer_tag_name, newer_tag_link, newer_tag_time, older_tag_name, project_url)
+
+      @content += generate_body(pull_requests, issues)
+
+      @content
+    end
+
+    private
+
+    # Creates section objects and the label and section maps needed for
+    # sorting
+    def set_sections_and_maps
+      @sections = if @options.configure_sections?
+                    parse_sections(@options[:configure_sections])
+                  elsif @options.add_sections?
+                    default_sections.concat parse_sections(@options[:add_sections])
+                  else
+                    default_sections
+                  end
+
+      @lmap = label_map
+      @smap = section_map
+    end
+
+    # Turns a string from the commandline into an array of Section objects
+    #
+    # @param [String, Hash] either string or hash describing sections
+    # @return [Array] array of Section objects
+    def parse_sections(sections_desc)
+      require "json"
+
+      sections_desc = sections_desc.to_json if sections_desc.class == Hash
+
+      begin
+        sections_json = JSON.parse(sections_desc)
+      rescue JSON::ParserError => e
+        raise "There was a problem parsing your JSON string for sections: #{e}"
+      end
+
+      sections_json.collect do |name, v|
+        Section.new(name: name.to_s, prefix: v["prefix"], labels: v["labels"], options: @options)
+      end
+    end
+
+    # Creates a hash map of labels => section objects
+    #
+    # @return [Hash] map of labels => section objects
+    def label_map
+      @sections.each_with_object({}) do |section_obj, memo|
+        section_obj.labels.each do |label|
+          memo[label] = section_obj.name
+        end
+      end
+    end
+
+    # Creates a hash map of 'section name' => section object
+    #
+    # @return [Hash] map of 'section name' => section object
+    def section_map
+      @sections.each_with_object({}) do |section, memo|
+        memo[section.name] = section
+      end
+    end
+
+    # It generates header text for an entry with specific parameters.
+    #
+    # @param [String] newer_tag_name - name of newer tag
+    # @param [String] newer_tag_link - used for links. Could be same as #newer_tag_name or some specific value, like HEAD
+    # @param [Time] newer_tag_time - time, when newer tag created
+    # @param [String] older_tag_name - tag name, used for links.
+    # @param [String] project_url - url for current project.
+    # @return [String] - Header text for a changelog entry.
+    def generate_header(newer_tag_name, newer_tag_link, newer_tag_time, older_tag_name, project_url)
+      header = ""
+
+      # Generate date string:
+      time_string = newer_tag_time.strftime(@options[:date_format])
+
+      # Generate tag name and link
+      release_url = if @options[:release_url]
+                      format(@options[:release_url], newer_tag_link)
+                    else
+                      "#{project_url}/tree/#{newer_tag_link}"
+                    end
+      header += if newer_tag_name.equal?(@options[:unreleased_label])
+                  "## [#{newer_tag_name}](#{release_url})\n\n"
+                else
+                  "## [#{newer_tag_name}](#{release_url}) (#{time_string})\n\n"
+                end
+
+      if @options[:compare_link] && older_tag_name
+        # Generate compare link
+        header += "[Full Changelog](#{project_url}/compare/#{older_tag_name}...#{newer_tag_link})\n\n"
+      end
+
+      header
+    end
+
+    # Generates complete body text for a tag (without a header)
+    #
+    # @param [Array] pull_requests
+    # @param [Array] issues
+    # @returns [String] ready-to-go tag body
+    def generate_body(pull_requests, issues)
+      body = ""
+      body += main_sections_to_log(pull_requests, issues)
+      body += merged_section_to_log(pull_requests) if @options[:pulls] && @options[:add_pr_wo_labels]
+      body
+    end
+
+    # Generates main sections for a tag
+    #
+    # @param [Array] pull_requests
+    # @param [Array] issues
+    # @return [string] ready-to-go sub-sections
+    def main_sections_to_log(pull_requests, issues)
+      if @options[:issues]
+        sections_to_log = parse_by_sections(pull_requests, issues)
+
+        sections_to_log.map(&:generate_content).join
+      end
+    end
+
+    # Generates section for prs with no labels (for a tag)
+    #
+    # @param [Array] pull_requests
+    # @return [string] ready-to-go sub-section
+    def merged_section_to_log(pull_requests)
+      merged = Section.new(name: "merged", prefix: @options[:merge_prefix], labels: [], issues: pull_requests, options: @options)
+      @sections << merged unless @sections.find { |section| section.name == "merged" }
+      merged.generate_content
+    end
+
+    # Set of default sections for backwards-compatibility/defaults
+    #
+    # @return [Array] array of Section objects
+    def default_sections
+      [
+        Section.new(name: "breaking", prefix: @options[:breaking_prefix], labels: @options[:breaking_labels], options: @options),
+        Section.new(name: "enhancements", prefix: @options[:enhancement_prefix], labels: @options[:enhancement_labels], options: @options),
+        Section.new(name: "bugs", prefix: @options[:bug_prefix], labels: @options[:bug_labels], options: @options),
+        Section.new(name: "issues", prefix: @options[:issue_prefix], labels: @options[:issue_labels], options: @options)
+      ]
+    end
+
+    # This method sorts issues by types
+    # (bugs, features, or just closed issues) by labels
+    #
+    # @param [Array] pull_requests
+    # @param [Array] issues
+    # @return [Hash] Mapping of filtered arrays: (Bugs, Enhancements, Breaking stuff, Issues)
+    def parse_by_sections(pull_requests, issues)
+      issues.each do |dict|
+        added = false
+
+        dict["labels"].each do |label|
+          break if @lmap[label["name"]].nil?
+          @smap[@lmap[label["name"]]].issues << dict
+          added = true
+
+          break if added
+        end
+        if @smap["issues"]
+          @sections.find { |sect| sect.name == "issues" }.issues << dict unless added
+        end
+      end
+      sort_pull_requests(pull_requests)
+    end
+
+    # This method iterates through PRs and sorts them into sections
+    #
+    # @param [Array] pull_requests
+    # @param [Hash] sections
+    # @return [Hash] sections
+    def sort_pull_requests(pull_requests)
+      added_pull_requests = []
+      pull_requests.each do |pr|
+        added = false
+
+        pr["labels"].each do |label|
+          break if @lmap[label["name"]].nil?
+          @smap[@lmap[label["name"]]].issues << pr
+          added_pull_requests << pr
+          added = true
+
+          break if added
+        end
+      end
+      added_pull_requests.each { |req| pull_requests.delete(req) }
+      @sections
+    end
+
+    def line_labels_for(issue)
+      labels = if @options[:issue_line_labels] == ["ALL"]
+                 issue["labels"]
+               else
+                 issue["labels"].select { |label| @options[:issue_line_labels].include?(label["name"]) }
+               end
+      labels.map { |label| " \[[#{label['name']}](#{label['url'].sub('api.github.com/repos', 'github.com')})\]" }.join("")
+    end
+  end
+end

lib/github_changelog_generator/generator/generator.rb

@@ -1,18 +1,30 @@
 # frozen_string_literal: true
 
 require "github_changelog_generator/octo_fetcher"
-require "github_changelog_generator/generator/generator_generation"
 require "github_changelog_generator/generator/generator_fetcher"
 require "github_changelog_generator/generator/generator_processor"
 require "github_changelog_generator/generator/generator_tags"
+require "github_changelog_generator/generator/entry"
+require "github_changelog_generator/generator/section"
 
 module GitHubChangelogGenerator
   # Default error for ChangelogGenerator
   class ChangelogGeneratorError < StandardError
   end
 
+  # This class is the high-level code for gathering issues and PRs for a github
+  # repository and generating a CHANGELOG.md file. A changelog is made up of a
+  # series of "entries" of all tagged releases, plus an extra entry for the
+  # unreleased changes. Entries are made up of various organizational
+  # "sections," and sections contain the github issues and PRs.
+  #
+  # So the changelog contains entries, entries contain sections, and sections
+  # contain issues and PRs.
+  #
+  # @see GitHubChangelogGenerator::Entry
+  # @see GitHubChangelogGenerator::Section
   class Generator
-    attr_accessor :options, :filtered_tags, :github, :tag_section_mapping, :sorted_tags
+    attr_accessor :options, :filtered_tags, :tag_section_mapping, :sorted_tags
 
     # A Generator responsible for all logic, related with changelog generation from ready-to-parse issues
     #
@@ -23,6 +35,104 @@ module GitHubChangelogGenerator
       @options        = options
       @tag_times_hash = {}
       @fetcher        = GitHubChangelogGenerator::OctoFetcher.new(options)
+      @sections       = []
+    end
+
+    # Main function to start changelog generation
+    #
+    # @return [String] Generated changelog file
+    def compound_changelog
+      options.load_custom_ruby_files
+      fetch_and_filter_tags
+      fetch_issues_and_pr
+
+      log = ""
+      log += options[:frontmatter] if options[:frontmatter]
+      log += "#{options[:header]}\n\n"
+
+      log += if options[:unreleased_only]
+               generate_entry_between_tags(filtered_tags[0], nil)
+             else
+               generate_entries_for_all_tags
+             end
+
+      log += File.read(options[:base]) if File.file?(options[:base])
+
+      credit_line = "\n\n\\* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*"
+      log.gsub!(credit_line, "") # Remove old credit lines
+      log += credit_line
+
+      @log = log
+    end
+
+    private
+
+    # Generate log only between 2 specified tags
+    # @param [String] older_tag all issues before this tag date will be excluded. May be nil, if it's first tag
+    # @param [String] newer_tag all issue after this tag will be excluded. May be nil for unreleased section
+    def generate_entry_between_tags(older_tag, newer_tag)
+      filtered_issues, filtered_pull_requests = filter_issues_for_tags(newer_tag, older_tag)
+
+      if newer_tag.nil? && filtered_issues.empty? && filtered_pull_requests.empty?
+        # do not generate empty unreleased section
+        return ""
+      end
+
+      newer_tag_link, newer_tag_name, newer_tag_time = detect_link_tag_time(newer_tag)
+
+      # If the older tag is nil, go back in time from the latest tag and find
+      # the SHA for the first commit.
+      older_tag_name =
+        if older_tag.nil?
+          @fetcher.commits_before(newer_tag_time).last["sha"]
+        else
+          older_tag["name"]
+        end
+
+      Entry.new(options).create_entry_for_tag(filtered_pull_requests, filtered_issues, newer_tag_name, newer_tag_link, newer_tag_time, older_tag_name)
+    end
+
+    # Filters issues and pull requests based on, respectively, `closed_at` and `merged_at`
+    #  timestamp fields.
+    #
+    # @return [Array] filtered issues and pull requests
+    def filter_issues_for_tags(newer_tag, older_tag)
+      filtered_pull_requests = delete_by_time(@pull_requests, "merged_at", older_tag, newer_tag)
+      filtered_issues        = delete_by_time(@issues, "closed_at", older_tag, newer_tag)
+
+      newer_tag_name = newer_tag.nil? ? nil : newer_tag["name"]
+
+      if options[:filter_issues_by_milestone]
+        # delete excess irrelevant issues (according milestones). Issue #22.
+        filtered_issues = filter_by_milestone(filtered_issues, newer_tag_name, @issues)
+        filtered_pull_requests = filter_by_milestone(filtered_pull_requests, newer_tag_name, @pull_requests)
+      end
+      [filtered_issues, filtered_pull_requests]
+    end
+
+    # The full cycle of generation for whole project
+    # @return [String] All entries in the changelog
+    def generate_entries_for_all_tags
+      puts "Generating entry..." if options[:verbose]
+
+      entries = generate_unreleased_entry
+
+      @tag_section_mapping.each_pair do |_tag_section, left_right_tags|
+        older_tag, newer_tag = left_right_tags
+        entries += generate_entry_between_tags(older_tag, newer_tag)
+      end
+
+      entries
+    end
+
+    def generate_unreleased_entry
+      entry = ""
+      if options[:unreleased]
+        start_tag        = filtered_tags[0] || sorted_tags.last
+        unreleased_entry = generate_entry_between_tags(start_tag, nil)
+        entry           += unreleased_entry if unreleased_entry
+      end
+      entry
     end
 
     def fetch_issues_and_pr
@@ -35,144 +145,5 @@ module GitHubChangelogGenerator
       fetch_events_for_issues_and_pr
       detect_actual_closed_dates(@issues + @pull_requests)
     end
-
-    ENCAPSULATED_CHARACTERS = %w(< > * _ \( \) [ ] #)
-
-    # Encapsulate characters to make Markdown look as expected.
-    #
-    # @param [String] string
-    # @return [String] encapsulated input string
-    def encapsulate_string(string)
-      string = string.gsub('\\', '\\\\')
-
-      ENCAPSULATED_CHARACTERS.each do |char|
-        string = string.gsub(char, "\\#{char}")
-      end
-
-      string
-    end
-
-    # Generates log for section with header and body
-    #
-    # @param [Array] pull_requests List or PR's in new section
-    # @param [Array] issues List of issues in new section
-    # @param [String] newer_tag Name of the newer tag. Could be nil for `Unreleased` section
-    # @param [Hash, nil] older_tag Older tag, used for the links. Could be nil for last tag.
-    # @return [String] Ready and parsed section
-    def create_log_for_tag(pull_requests, issues, newer_tag, older_tag = nil)
-      newer_tag_link, newer_tag_name, newer_tag_time = detect_link_tag_time(newer_tag)
-
-      github_site = options[:github_site] || "https://github.com"
-      project_url = "#{github_site}/#{options[:user]}/#{options[:project]}"
-
-      # If the older tag is nil, go back in time from the latest tag and find
-      # the SHA for the first commit.
-      older_tag_name =
-        if older_tag.nil?
-          @fetcher.commits_before(newer_tag_time).last["sha"]
-        else
-          older_tag["name"]
-        end
-
-      log = generate_header(newer_tag_name, newer_tag_link, newer_tag_time, older_tag_name, project_url)
-
-      if options[:issues]
-        # Generate issues:
-        log += issues_to_log(issues, pull_requests)
-      end
-
-      if options[:pulls] && options[:add_pr_wo_labels]
-        # Generate pull requests:
-        log += generate_sub_section(pull_requests, options[:merge_prefix])
-      end
-
-      log
-    end
-
-    # Generate ready-to-paste log from list of issues and pull requests.
-    #
-    # @param [Array] issues
-    # @param [Array] pull_requests
-    # @return [String] generated log for issues
-    def issues_to_log(issues, pull_requests)
-      sections = parse_by_sections(issues, pull_requests)
-
-      log = ""
-      log += generate_sub_section(sections[:breaking], options[:breaking_prefix])
-      log += generate_sub_section(sections[:enhancements], options[:enhancement_prefix])
-      log += generate_sub_section(sections[:bugs], options[:bug_prefix])
-      log += generate_sub_section(sections[:issues], options[:issue_prefix])
-      log
-    end
-
-    # This method sort issues by types
-    # (bugs, features, or just closed issues) by labels
-    #
-    # @param [Array] issues
-    # @param [Array] pull_requests
-    # @return [Hash] Mapping of filtered arrays: (Bugs, Enhancements, Breaking stuff, Issues)
-    def parse_by_sections(issues, pull_requests)
-      sections = {
-        issues: [],
-        enhancements: [],
-        bugs: [],
-        breaking: []
-      }
-
-      issues.each do |dict|
-        added = false
-
-        dict["labels"].each do |label|
-          if options[:bug_labels].include?(label["name"])
-            sections[:bugs] << dict
-            added = true
-          elsif options[:enhancement_labels].include?(label["name"])
-            sections[:enhancements] << dict
-            added = true
-          elsif options[:breaking_labels].include?(label["name"])
-            sections[:breaking] << dict
-            added = true
-          end
-
-          break if added
-        end
-
-        sections[:issues] << dict unless added
-      end
-
-      sort_pull_requests(pull_requests, sections)
-    end
-
-    # This method iterates through PRs and sorts them into sections
-    #
-    # @param [Array] pull_requests
-    # @param [Hash] sections
-    # @return [Hash] sections
-    def sort_pull_requests(pull_requests, sections)
-      added_pull_requests = []
-      pull_requests.each do |pr|
-        added = false
-
-        pr["labels"].each do |label|
-          if options[:bug_labels].include?(label["name"])
-            sections[:bugs] << pr
-            added_pull_requests << pr
-            added = true
-          elsif options[:enhancement_labels].include?(label["name"])
-            sections[:enhancements] << pr
-            added_pull_requests << pr
-            added = true
-          elsif options[:breaking_labels].include?(label["name"])
-            sections[:breaking] << pr
-            added_pull_requests << pr
-            added = true
-          end
-
-          break if added
-        end
-      end
-      added_pull_requests.each { |p| pull_requests.delete(p) }
-      sections
-    end
   end
 end

lib/github_changelog_generator/generator/generator_generation.rb

@@ -1,181 +0,0 @@
-# frozen_string_literal: true
-
-module GitHubChangelogGenerator
-  class Generator
-    # Main function to start change log generation
-    #
-    # @return [String] Generated change log file
-    def compound_changelog
-      options.load_custom_ruby_files
-      fetch_and_filter_tags
-      fetch_issues_and_pr
-
-      log = ""
-      log += options[:frontmatter] if options[:frontmatter]
-      log += "#{options[:header]}\n\n"
-
-      log += if options[:unreleased_only]
-               generate_log_between_tags(filtered_tags[0], nil)
-             else
-               generate_log_for_all_tags
-             end
-
-      log += File.read(options[:base]) if File.file?(options[:base])
-
-      credit_line = "\n\n\\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*"
-      log.gsub!(credit_line, "") # Remove old credit lines
-      log += credit_line
-
-      @log = log
-    end
-
-    # @param [Array] issues List of issues on sub-section
-    # @param [String] prefix Name of sub-section
-    # @return [String] Generate ready-to-go sub-section
-    def generate_sub_section(issues, prefix)
-      log = ""
-
-      if issues.any?
-        log += "#{prefix}\n\n" unless options[:simple_list]
-        issues.each do |issue|
-          merge_string = get_string_for_issue(issue)
-          log += "- #{merge_string}\n"
-        end
-        log += "\n"
-      end
-      log
-    end
-
-    # It generate one header for section with specific parameters.
-    #
-    # @param [String] newer_tag_name - name of newer tag
-    # @param [String] newer_tag_link - used for links. Could be same as #newer_tag_name or some specific value, like HEAD
-    # @param [Time] newer_tag_time - time, when newer tag created
-    # @param [String] older_tag_link - tag name, used for links.
-    # @param [String] project_url - url for current project.
-    # @return [String] - Generate one ready-to-add section.
-    def generate_header(newer_tag_name, newer_tag_link, newer_tag_time, older_tag_link, project_url)
-      log = ""
-
-      # Generate date string:
-      time_string = newer_tag_time.strftime(options[:date_format])
-
-      # Generate tag name and link
-      release_url = if options[:release_url]
-                      format(options[:release_url], newer_tag_link)
-                    else
-                      "#{project_url}/tree/#{newer_tag_link}"
-                    end
-      log += if newer_tag_name.equal?(options[:unreleased_label])
-               "## [#{newer_tag_name}](#{release_url})\n\n"
-             else
-               "## [#{newer_tag_name}](#{release_url}) (#{time_string})\n\n"
-             end
-
-      if options[:compare_link] && older_tag_link
-        # Generate compare link
-        log += "[Full Changelog](#{project_url}/compare/#{older_tag_link}...#{newer_tag_link})\n\n"
-      end
-
-      log
-    end
-
-    # Generate log only between 2 specified tags
-    # @param [String] older_tag all issues before this tag date will be excluded. May be nil, if it's first tag
-    # @param [String] newer_tag all issue after this tag will be excluded. May be nil for unreleased section
-    def generate_log_between_tags(older_tag, newer_tag)
-      filtered_issues, filtered_pull_requests = filter_issues_for_tags(newer_tag, older_tag)
-
-      if newer_tag.nil? && filtered_issues.empty? && filtered_pull_requests.empty?
-        # do not generate empty unreleased section
-        return ""
-      end
-
-      create_log_for_tag(filtered_pull_requests, filtered_issues, newer_tag, older_tag)
-    end
-
-    # Filters issues and pull requests based on, respectively, `closed_at` and `merged_at`
-    #  timestamp fields.
-    #
-    # @return [Array] filtered issues and pull requests
-    def filter_issues_for_tags(newer_tag, older_tag)
-      filtered_pull_requests = delete_by_time(@pull_requests, "merged_at", older_tag, newer_tag)
-      filtered_issues        = delete_by_time(@issues, "closed_at", older_tag, newer_tag)
-
-      newer_tag_name = newer_tag.nil? ? nil : newer_tag["name"]
-
-      if options[:filter_issues_by_milestone]
-        # delete excess irrelevant issues (according milestones). Issue #22.
-        filtered_issues = filter_by_milestone(filtered_issues, newer_tag_name, @issues)
-        filtered_pull_requests = filter_by_milestone(filtered_pull_requests, newer_tag_name, @pull_requests)
-      end
-      [filtered_issues, filtered_pull_requests]
-    end
-
-    # The full cycle of generation for whole project
-    # @return [String] The complete change log
-    def generate_log_for_all_tags
-      puts "Generating log..." if options[:verbose]
-
-      log = generate_unreleased_section
-
-      @tag_section_mapping.each_pair do |_tag_section, left_right_tags|
-        older_tag, newer_tag = left_right_tags
-        log += generate_log_between_tags(older_tag, newer_tag)
-      end
-
-      log
-    end
-
-    def generate_unreleased_section
-      log = ""
-      if options[:unreleased]
-        start_tag      = filtered_tags[0] || sorted_tags.last
-        unreleased_log = generate_log_between_tags(start_tag, nil)
-        log           += unreleased_log if unreleased_log
-      end
-      log
-    end
-
-    # Parse issue and generate single line formatted issue line.
-    #
-    # Example output:
-    # - Add coveralls integration [\#223](https://github.com/skywinder/github-changelog-generator/pull/223) (@skywinder)
-    #
-    # @param [Hash] issue Fetched issue from GitHub
-    # @return [String] Markdown-formatted single issue
-    def get_string_for_issue(issue)
-      encapsulated_title = encapsulate_string issue["title"]
-
-      title_with_number = "#{encapsulated_title} [\\##{issue['number']}](#{issue['html_url']})"
-      if options[:issue_line_labels].present?
-        title_with_number = "#{title_with_number}#{line_labels_for(issue)}"
-      end
-      issue_line_with_user(title_with_number, issue)
-    end
-
-    private
-
-    def line_labels_for(issue)
-      labels = if options[:issue_line_labels] == ["ALL"]
-                 issue["labels"]
-               else
-                 issue["labels"].select { |label| options[:issue_line_labels].include?(label["name"]) }
-               end
-      labels.map { |label| " \[[#{label['name']}](#{label['url'].sub('api.github.com/repos', 'github.com')})\]" }.join("")
-    end
-
-    def issue_line_with_user(line, issue)
-      return line if !options[:author] || issue["pull_request"].nil?
-
-      user = issue["user"]
-      return "#{line} ({Null user})" unless user
-
-      if options[:usernames_as_github_logins]
-        "#{line} (@#{user['login']})"
-      else
-        "#{line} ([#{user['login']}](#{user['html_url']}))"
-      end
-    end
-  end
-end

lib/github_changelog_generator/generator/section.rb

@@ -0,0 +1,83 @@
+module GitHubChangelogGenerator
+  # This class generates the content for a single section of a changelog entry.
+  # It turns the tagged issues and PRs into a well-formatted list of changes to
+  # be later incorporated into a changelog entry.
+  #
+  # @see GitHubChangelogGenerator::Entry
+  class Section
+    attr_accessor :name, :prefix, :issues, :labels
+
+    def initialize(opts = {})
+      @name = opts[:name]
+      @prefix = opts[:prefix]
+      @labels = opts[:labels] || []
+      @issues = opts[:issues] || []
+      @options = opts[:options] || Options.new({})
+    end
+
+    # @param [Array] issues List of issues on sub-section
+    # @param [String] prefix Name of sub-section
+    # @return [String] Generate section content
+    def generate_content
+      content = ""
+
+      if @issues.any?
+        content += "#{@prefix}\n\n" unless @options[:simple_list]
+        @issues.each do |issue|
+          merge_string = get_string_for_issue(issue)
+          content += "- #{merge_string}\n"
+        end
+        content += "\n"
+      end
+      content
+    end
+
+    private
+
+    # Parse issue and generate single line formatted issue line.
+    #
+    # Example output:
+    # - Add coveralls integration [\#223](https://github.com/skywinder/github-changelog-generator/pull/223) (@skywinder)
+    #
+    # @param [Hash] issue Fetched issue from GitHub
+    # @return [String] Markdown-formatted single issue
+    def get_string_for_issue(issue)
+      encapsulated_title = encapsulate_string issue["title"]
+
+      title_with_number = "#{encapsulated_title} [\\##{issue['number']}](#{issue['html_url']})"
+      if @options[:issue_line_labels].present?
+        title_with_number = "#{title_with_number}#{line_labels_for(issue)}"
+      end
+      issue_line_with_user(title_with_number, issue)
+    end
+
+    def issue_line_with_user(line, issue)
+      return line if !@options[:author] || issue["pull_request"].nil?
+
+      user = issue["user"]
+      return "#{line} ({Null user})" unless user
+
+      if @options[:usernames_as_github_logins]
+        "#{line} (@#{user['login']})"
+      else
+        "#{line} ([#{user['login']}](#{user['html_url']}))"
+      end
+    end
+
+    ENCAPSULATED_CHARACTERS = %w(< > * _ \( \) [ ] #)
+
+    # Encapsulate characters to make Markdown look as expected.
+    #
+    # @param [String] string
+    # @return [String] encapsulated input string
+    def encapsulate_string(string)
+      string = string.gsub('\\', '\\\\')
+
+      ENCAPSULATED_CHARACTERS.each do |char|
+        string = string.gsub(char, "\\#{char}")
+      end
+
+      string
+    end
+  end
+end

lib/github_changelog_generator/options.rb

@@ -15,6 +15,7 @@ module GitHubChangelogGenerator
     KNOWN_OPTIONS = %i[
       add_issues_wo_labels
       add_pr_wo_labels
+      add_sections
       author
       base
       between_tags
@@ -29,6 +30,7 @@ module GitHubChangelogGenerator
       enhancement_prefix
       breaking_labels
       breaking_prefix
+      configure_sections
       exclude_labels
       exclude_tags
       exclude_tags_regex
@@ -100,6 +102,16 @@ module GitHubChangelogGenerator
       puts ""
     end
 
+    # Boolean method for whether the user is using configure_sections
+    def configure_sections?
+      !self[:configure_sections].nil? && !self[:configure_sections].empty?
+    end
+
+    # Boolean method for whether the user is using add_sections
+    def add_sections?
+      !self[:add_sections].nil? && !self[:add_sections].empty?
+    end
+
     private
 
     def values

lib/github_changelog_generator/parser.rb

@@ -68,9 +68,15 @@ module GitHubChangelogGenerator
         opts.on("--issues-label [LABEL]", "Setup custom label for closed-issues section. Default is \"**Closed issues:**\"") do |v|
           options[:issue_prefix] = v
         end
-        opts.on("--header-label [LABEL]", "Setup custom header label. Default is \"# Change Log\"") do |v|
+        opts.on("--header-label [LABEL]", "Setup custom header label. Default is \"# Changelog\"") do |v|
           options[:header] = v
         end
+        opts.on("--configure-sections [Hash, String]", "Define your own set of sections which overrides all default sections") do |v|
+          options[:configure_sections] = v
+        end
+        opts.on("--add-sections [Hash, String]", "Add new sections but keep the default sections") do |v|
+          options[:add_sections] = v
+        end
         opts.on("--front-matter [JSON]", "Add YAML front matter. Formatted as JSON because it's easier to add on the command line") do |v|
           options[:frontmatter] = JSON.parse(v).to_yaml + "---\n"
         end
@@ -209,12 +215,14 @@ module GitHubChangelogGenerator
         bug_labels: ["bug", "Bug", "Type: Bug"],
         exclude_labels: ["duplicate", "question", "invalid", "wontfix", "Duplicate", "Question", "Invalid", "Wontfix", "Meta: Exclude From Changelog"],
         breaking_labels: %w[backwards-incompatible breaking],
+        configure_sections: {},
+        add_sections: {},
         issue_line_labels: [],
         max_issues: nil,
         simple_list: false,
         ssl_ca_file: nil,
         verbose: true,
-        header: "# Change Log",
+        header: "# Changelog",
         merge_prefix: "**Merged pull requests:**",
         issue_prefix: "**Closed issues:**",
         bug_prefix: "**Fixed bugs:**",

lib/github_changelog_generator/task.rb

@@ -10,7 +10,6 @@ module GitHubChangelogGenerator
 
     OPTIONS = %w[ user project token date_format output
                   bug_prefix enhancement_prefix issue_prefix
-                  breaking_labels issue_line_labels
                   header merge_prefix issues
                   add_issues_wo_labels add_pr_wo_labels
                   pulls filter_issues_by_milestone author
@@ -20,7 +19,7 @@ module GitHubChangelogGenerator
                   between_tags exclude_tags exclude_tags_regex since_tag max_issues
                   github_site github_endpoint simple_list
                   future_release release_branch verbose release_url
-                  base ]
+                  base configure_sections add_sections]
 
     OPTIONS.each do |o|
       attr_accessor o.to_sym

man/git-generate-changelog.1

@@ -1,7 +1,7 @@
 .\" generated with Ronn/v0.7.3
 .\" http://github.com/rtomayko/ronn/tree/0.7.3
 .
-.TH "GIT\-GENERATE\-CHANGELOG" "1" "October 2017" "" ""
+.TH "GIT\-GENERATE\-CHANGELOG" "1" "December 2017" "" ""
 .
 .SH "NAME"
 \fBgit\-generate\-changelog\fR \- Generate changelog from github
@@ -70,7 +70,7 @@ Setup custom label for closed\-issues section\. Default is "\fBClosed issues:\fR
 \-\-header\-label [LABEL]
 .
 .P
-Setup custom header label\. Default is "# Change Log"
+Setup custom header label\. Default is "# Changelog"
 .
 .P
 \-\-front\-matter [JSON]
@@ -284,6 +284,18 @@ Paths to Ruby file(s) to require before generating changelog\.
 Run verbosely\. Default is true
 .
 .P
+\-\-configure\-sections [HASH, STRING]
+.
+.P
+Define your own set of sections which overrides all default sections") do |v|
+.
+.P
+\-\-add\-sections [HASH, STRING]
+.
+.P
+Add new sections but keep the default sections"
+.
+.P
 \-v, \-\-version
 .
 .P

man/git-generate-changelog.1.html

@@ -122,7 +122,7 @@
 
 <p>   --header-label [LABEL]</p>
 
-<p>   Setup custom header label. Default is "# Change Log"</p>
+<p>   Setup custom header label. Default is "# Changelog"</p>
 
 <p>   --front-matter [JSON]</p>
 
@@ -261,6 +261,14 @@
 
 <p>   Run verbosely. Default is true</p>
 
+<p>   --configure-sections [HASH, STRING]</p>
+
+<p>   Define your own set of sections which overrides all default sections") do |v|</p>
+
+<p>   --add-sections [HASH, STRING]</p>
+
+<p>   Add new sections but keep the default sections"</p>
+
 <p>   -v, --version</p>
 
 <p>   Print version number</p>
@@ -286,7 +294,7 @@
 
   <ol class='man-decor man-foot man foot'>
     <li class='tl'></li>
-    <li class='tc'>October 2017</li>
+    <li class='tc'>December 2017</li>
     <li class='tr'>git-generate-changelog(1)</li>
   </ol>
 

man/git-generate-changelog.html

@@ -122,7 +122,7 @@
 
 <p>   --header-label [LABEL]</p>
 
-<p>   Setup custom header label. Default is "# Change Log"</p>
+<p>   Setup custom header label. Default is "# Changelog"</p>
 
 <p>   --pr-label [LABEL]</p>
 
@@ -220,6 +220,18 @@
 
 <p>   Put the unreleased changes in the specified release number.</p>
 
+<p>   --configure-sections [HASH, STRING]</p>
+
+<p>   Define your own set of sections which overrides all default sections") do |v|</p>
+
+<p>   --add-sections [HASH, STRING]</p>
+
+<p>   Add new sections but keep the default sections"</p>
+
+<p>   --include-merged</p>
+
+<p>   If configure_sections is set, use this to restore the merged pull requests sections</p>
+
 <p>   --[no-]verbose</p>
 
 <p>   Run verbosely. Default is true</p>

man/git-generate-changelog.md

@@ -1,4 +1,4 @@
-git-generate-changelog(1) - Generate changelog from github
+git-generate-changelog(1) - Generate changelog from GitHub
 ================================
 
 ## SYNOPSIS
@@ -49,7 +49,7 @@ Automatically generate change log from your tags, issues, labels and pull reques
 
    --header-label [LABEL]
 
-   Setup custom header label. Default is "# Change Log"
+   Setup custom header label. Default is "# Changelog"
 
    --front-matter [JSON]
 
@@ -187,6 +187,14 @@ Automatically generate change log from your tags, issues, labels and pull reques
 
    Run verbosely. Default is true
 
+   --configure-sections [HASH, STRING]
+
+   Define your own set of sections which overrides all default sections") do |v|
+
+   --add-sections [HASH, STRING]
+
+   Add new sections but keep the default sections"
+
    -v, --version
 
    Print version number

spec/files/github-changelog-generator.md

@@ -1,4 +1,4 @@
-# Change Log
+# Changelog
 
 ## [1.3.10](https://github.com/skywinder/Github-Changelog-Generator/tree/1.3.10) (2015-03-18)
 
@@ -302,4 +302,4 @@
 
 
 
-\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*
+\* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*

spec/unit/generator/entry_spec.rb

@@ -0,0 +1,362 @@
+# frozen_string_literal: true
+
+# rubocop:disable Metrics/ModuleLength
+module GitHubChangelogGenerator
+  RSpec.describe Entry do
+    def label(name)
+      { "name" => name }
+    end
+
+    def issue(title, labels, number = "1", user = { "login" => "user" })
+      {
+        "title" => "issue #{title}",
+        "labels" => labels.map { |l| label(l) },
+        "number" => number,
+        "html_url" => "https://github.com/owner/repo/issue/#{number}",
+        "user" => user
+      }
+    end
+
+    def pr(title, labels, number = "1", user = { "login" => "user" })
+      {
+        "pull_request" => true,
+        "title" => "pr #{title}",
+        "labels" => labels.map { |l| label(l) },
+        "number" => number,
+        "html_url" => "https://github.com/owner/repo/pull/#{number}",
+        "user" => user.merge("html_url" => "https://github.com/#{user['login']}")
+      }
+    end
+
+    def titles_for(issues)
+      issues.map { |issue| issue["title"] }
+    end
+
+    def default_sections
+      %w[enhancements bugs breaking issues]
+    end
+
+    describe "#create_entry_for_tag" do
+      let(:options) do
+        Parser.default_options.merge(
+          user: "owner",
+          project: "repo",
+          bug_labels: ["bug"],
+          enhancement_labels: ["enhancement"],
+          breaking_labels: ["breaking"]
+        )
+      end
+
+      let(:issues) do
+        [
+          issue("no labels", [], "5", "login" => "user1"),
+          issue("enhancement", ["enhancement"], "6", "login" => "user2"),
+          issue("bug", ["bug"], "7", "login" => "user1"),
+          issue("breaking", ["breaking"], "8", "login" => "user5"),
+          issue("all the labels", %w[enhancement bug breaking], "9", "login" => "user9")
+        ]
+      end
+
+      let(:pull_requests) do
+        [
+          pr("no labels", [], "10", "login" => "user1"),
+          pr("enhancement", ["enhancement"], "11", "login" => "user5"),
+          pr("bug", ["bug"], "12", "login" => "user5"),
+          pr("breaking", ["breaking"], "13", "login" => "user5"),
+          pr("all the labels", %w[enhancement bug breaking], "14", "login" => "user5")
+        ]
+      end
+
+      subject { described_class.new(options) }
+      it "generates a header and body" do
+        changelog = <<-CHANGELOG.gsub(/^ {8}/, "")
+        ## [1.0.1](https://github.com/owner/repo/tree/1.0.1) (2017-12-04)
+
+        [Full Changelog](https://github.com/owner/repo/compare/1.0.0...1.0.1)
+
+        **Breaking changes:**
+
+        - issue breaking [\\#8](https://github.com/owner/repo/issue/8)
+        - pr breaking [\\#13](https://github.com/owner/repo/pull/13) ([user5](https://github.com/user5))
+
+        **Implemented enhancements:**
+
+        - issue enhancement [\\#6](https://github.com/owner/repo/issue/6)
+        - issue all the labels [\\#9](https://github.com/owner/repo/issue/9)
+        - pr enhancement [\\#11](https://github.com/owner/repo/pull/11) ([user5](https://github.com/user5))
+        - pr all the labels [\\#14](https://github.com/owner/repo/pull/14) ([user5](https://github.com/user5))
+
+        **Fixed bugs:**
+
+        - issue bug [\\#7](https://github.com/owner/repo/issue/7)
+        - pr bug [\\#12](https://github.com/owner/repo/pull/12) ([user5](https://github.com/user5))
+
+        **Closed issues:**
+
+        - issue no labels [\\#5](https://github.com/owner/repo/issue/5)
+
+        **Merged pull requests:**
+
+        - pr no labels [\\#10](https://github.com/owner/repo/pull/10) ([user1](https://github.com/user1))
+
+        CHANGELOG
+        expect(subject.create_entry_for_tag(pull_requests, issues, "1.0.1", "1.0.1", Time.new(2017, 12, 4), "1.0.0")).to eq(changelog)
+      end
+    end
+    describe "#parse_sections" do
+      before do
+        subject { described_class.new }
+      end
+      context "valid json" do
+        let(:sections_string) { "{ \"foo\": { \"prefix\": \"foofix\", \"labels\": [\"test1\", \"test2\"]}, \"bar\": { \"prefix\": \"barfix\", \"labels\": [\"test3\", \"test4\"]}}" }
+
+        let(:sections_array) do
+          [
+            Section.new(name: "foo", prefix: "foofix", labels: %w[test1 test2]),
+            Section.new(name: "bar", prefix: "barfix", labels: %w[test3 test4])
+          ]
+        end
+
+        it "returns an array with 2 objects" do
+          arr = subject.send(:parse_sections, sections_string)
+          expect(arr.size).to eq 2
+          arr.each { |section| expect(section).to be_an_instance_of Section }
+        end
+
+        it "returns correctly constructed sections" do
+          require "json"
+
+          sections_json = JSON.parse(sections_string)
+          sections_array.each_index do |i|
+            aggregate_failures "checks each component" do
+              expect(sections_array[i].name).to eq sections_json.first[0]
+              expect(sections_array[i].prefix).to eq sections_json.first[1]["prefix"]
+              expect(sections_array[i].labels).to eq sections_json.first[1]["labels"]
+              expect(sections_array[i].issues).to eq []
+            end
+            sections_json.shift
+          end
+        end
+      end
+      context "hash" do
+        let(:sections_hash) do
+          {
+            enhancements: {
+              prefix: "**Enhancements**",
+              labels: %w[feature enhancement]
+            },
+            breaking: {
+              prefix: "**Breaking**",
+              labels: ["breaking"]
+            },
+            bugs: {
+              prefix: "**Bugs**",
+              labels: ["bug"]
+            }
+          }
+        end
+
+        let(:sections_array) do
+          [
+            Section.new(name: "enhancements", prefix: "**Enhancements**", labels: %w[feature enhancement]),
+            Section.new(name: "breaking", prefix: "**Breaking**", labels: ["breaking"]),
+            Section.new(name: "bugs", prefix: "**Bugs**", labels: ["bug"])
+          ]
+        end
+
+        it "returns an array with 3 objects" do
+          arr = subject.send(:parse_sections, sections_hash)
+          expect(arr.size).to eq 3
+          arr.each { |section| expect(section).to be_an_instance_of Section }
+        end
+
+        it "returns correctly constructed sections" do
+          sections_array.each_index do |i|
+            aggregate_failures "checks each component" do
+              expect(sections_array[i].name).to eq sections_hash.first[0].to_s
+              expect(sections_array[i].prefix).to eq sections_hash.first[1][:prefix]
+              expect(sections_array[i].labels).to eq sections_hash.first[1][:labels]
+              expect(sections_array[i].issues).to eq []
+            end
+            sections_hash.shift
+          end
+        end
+      end
+    end
+
+    describe "#parse_by_sections" do
+      context "default sections" do
+        let(:options) do
+          {
+            bug_labels: ["bug"],
+            enhancement_labels: ["enhancement"],
+            breaking_labels: ["breaking"]
+          }
+        end
+
+        let(:issues) do
+          [
+            issue("no labels", []),
+            issue("enhancement", ["enhancement"]),
+            issue("bug", ["bug"]),
+            issue("breaking", ["breaking"]),
+            issue("all the labels", %w[enhancement bug breaking])
+          ]
+        end
+
+        let(:pull_requests) do
+          [
+            pr("no labels", []),
+            pr("enhancement", ["enhancement"]),
+            pr("bug", ["bug"]),
+            pr("breaking", ["breaking"]),
+            pr("all the labels", %w[enhancement bug breaking])
+          ]
+        end
+
+        subject { described_class.new(options) }
+
+        before do
+          subject.send(:set_sections_and_maps)
+          @arr = subject.send(:parse_by_sections, pull_requests, issues)
+        end
+
+        it "returns 4 sections" do
+          expect(@arr.size).to eq 4
+        end
+
+        it "returns default sections" do
+          default_sections.each { |default_section| expect(@arr.select { |section| section.name == default_section }.size).to eq 1 }
+        end
+
+        it "assigns issues to the correct sections" do
+          breaking_section = @arr.select { |section| section.name == "breaking" }[0]
+          enhancement_section = @arr.select { |section| section.name == "enhancements" }[0]
+          issue_section = @arr.select { |section| section.name == "issues" }[0]
+          bug_section = @arr.select { |section| section.name == "bugs" }[0]
+
+          expect(titles_for(breaking_section.issues)).to eq(["issue breaking", "pr breaking"])
+          expect(titles_for(enhancement_section.issues)).to eq(["issue enhancement", "issue all the labels", "pr enhancement", "pr all the labels"])
+          expect(titles_for(issue_section.issues)).to eq(["issue no labels"])
+          expect(titles_for(bug_section.issues)).to eq(["issue bug", "pr bug"])
+          expect(titles_for(pull_requests)).to eq(["pr no labels"])
+        end
+      end
+      context "configure sections" do
+        let(:options) do
+          {
+            configure_sections: "{ \"foo\": { \"prefix\": \"foofix\", \"labels\": [\"test1\", \"test2\"]}, \"bar\": { \"prefix\": \"barfix\", \"labels\": [\"test3\", \"test4\"]}}"
+          }
+        end
+
+        let(:issues) do
+          [
+            issue("no labels", []),
+            issue("test1", ["test1"]),
+            issue("test3", ["test3"]),
+            issue("test4", ["test4"]),
+            issue("all the labels", %w[test1 test2 test3 test4])
+          ]
+        end
+
+        let(:pull_requests) do
+          [
+            pr("no labels", []),
+            pr("test1", ["test1"]),
+            pr("test3", ["test3"]),
+            pr("test4", ["test4"]),
+            pr("all the labels", %w[test1 test2 test3 test4])
+          ]
+        end
+
+        subject { described_class.new(options) }
+
+        before do
+          subject.send(:set_sections_and_maps)
+          @arr = subject.send(:parse_by_sections, pull_requests, issues)
+        end
+
+        it "returns 2 sections" do
+          expect(@arr.size).to eq 2
+        end
+
+        it "returns only configured sections" do
+          expect(@arr.select { |section| section.name == "foo" }.size).to eq 1
+          expect(@arr.select { |section| section.name == "bar" }.size).to eq 1
+        end
+
+        it "assigns issues to the correct sections" do
+          foo_section = @arr.select { |section| section.name == "foo" }[0]
+          bar_section = @arr.select { |section| section.name == "bar" }[0]
+
+          aggregate_failures "checks all sections" do
+            expect(titles_for(foo_section.issues)).to eq(["issue test1", "issue all the labels", "pr test1", "pr all the labels"])
+            expect(titles_for(bar_section.issues)).to eq(["issue test3", "issue test4", "pr test3", "pr test4"])
+            expect(titles_for(pull_requests)).to eq(["pr no labels"])
+          end
+        end
+      end
+      context "add sections" do
+        let(:options) do
+          {
+            bug_labels: ["bug"],
+            enhancement_labels: ["enhancement"],
+            breaking_labels: ["breaking"],
+            add_sections: "{ \"foo\": { \"prefix\": \"foofix\", \"labels\": [\"test1\", \"test2\"]}}"
+          }
+        end
+
+        let(:issues) do
+          [
+            issue("no labels", []),
+            issue("test1", ["test1"]),
+            issue("bugaboo", ["bug"]),
+            issue("all the labels", %w[test1 test2 enhancement bug])
+          ]
+        end
+
+        let(:pull_requests) do
+          [
+            pr("no labels", []),
+            pr("test1", ["test1"]),
+            pr("enhance", ["enhancement"]),
+            pr("all the labels", %w[test1 test2 enhancement bug])
+          ]
+        end
+
+        subject { described_class.new(options) }
+
+        before do
+          subject.send(:set_sections_and_maps)
+          @arr = subject.send(:parse_by_sections, pull_requests, issues)
+        end
+
+        it "returns 5 sections" do
+          expect(@arr.size).to eq 5
+        end
+
+        it "returns default sections" do
+          default_sections.each { |default_section| expect(@arr.select { |section| section.name == default_section }.size).to eq 1 }
+        end
+
+        it "returns added section" do
+          expect(@arr.select { |section| section.name == "foo" }.size).to eq 1
+        end
+
+        it "assigns issues to the correct sections" do
+          foo_section = @arr.select { |section| section.name == "foo" }[0]
+          enhancement_section = @arr.select { |section| section.name == "enhancements" }[0]
+          bug_section = @arr.select { |section| section.name == "bugs" }[0]
+
+          aggregate_failures "checks all sections" do
+            expect(titles_for(foo_section.issues)).to eq(["issue test1", "issue all the labels", "pr test1", "pr all the labels"])
+            expect(titles_for(enhancement_section.issues)).to eq(["pr enhance"])
+            expect(titles_for(bug_section.issues)).to eq(["issue bugaboo"])
+            expect(titles_for(pull_requests)).to eq(["pr no labels"])
+          end
+        end
+      end
+    end
+  end
+end
+# rubocop:enable Metrics/ModuleLength

spec/unit/generator/generator_generation_spec.rb

@@ -1,73 +0,0 @@
-# frozen_string_literal: true
-
-module GitHubChangelogGenerator
-  describe Generator do
-    describe "#get_string_for_issue" do
-      let(:issue) do
-        { "title" => "Bug in code" }
-      end
-
-      it "formats an issue according to options" do
-        expect do
-          described_class.new.get_string_for_issue(issue)
-        end.not_to raise_error
-      end
-    end
-
-    describe "#parse_by_sections" do
-      def label(name)
-        { "name" => name }
-      end
-
-      def issue(title, labels)
-        { "title" => "issue #{title}", "labels" => labels.map { |l| label(l) } }
-      end
-
-      def pr(title, labels)
-        { "title" => "pr #{title}", "labels" => labels.map { |l| label(l) } }
-      end
-
-      def get_titles(issues)
-        issues.map { |issue| issue["title"] }
-      end
-
-      let(:options) do
-        {
-          bug_labels: ["bug"],
-          enhancement_labels: ["enhancement"],
-          breaking_labels: ["breaking"]
-        }
-      end
-
-      let(:issues) do
-        [
-          issue("no labels", []),
-          issue("enhancement", ["enhancement"]),
-          issue("bug", ["bug"]),
-          issue("breaking", ["breaking"]),
-          issue("all the labels", %w[enhancement bug breaking])
-        ]
-      end
-
-      let(:pull_requests) do
-        [
-          pr("no labels", []),
-          pr("enhancement", ["enhancement"]),
-          pr("bug", ["bug"]),
-          pr("breaking", ["breaking"]),
-          pr("all the labels", %w[enhancement bug breaking])
-        ]
-      end
-
-      it "works" do
-        sections = described_class.new(options).parse_by_sections(issues, pull_requests)
-
-        expect(get_titles(sections[:issues])).to eq(["issue no labels"])
-        expect(get_titles(sections[:enhancements])).to eq(["issue enhancement", "issue all the labels", "pr enhancement", "pr all the labels"])
-        expect(get_titles(sections[:bugs])).to eq(["issue bug", "pr bug"])
-        expect(get_titles(sections[:breaking])).to eq(["issue breaking", "pr breaking"])
-        expect(get_titles(pull_requests)).to eq(["pr no labels"])
-      end
-    end
-  end
-end

spec/unit/reader_spec.rb

@@ -51,7 +51,7 @@ describe GitHubChangelogGenerator::Reader do
       it { is_expected.to be_empty }
     end
     context "when file has only the header" do
-      subject { @reader.parse("# Change Log") }
+      subject { @reader.parse("# Changelog") }
       it { is_expected.to be_an(Array) }
       it { is_expected.to be_empty }
     end