Added rudimentary gitlab support

.gitignore

@@ -1,6 +1,7 @@
-bin/
+bin/*
 !bin/git-generate-changelog
 !bin/github_changelog_generator
+!bin/gitlab_changelog_generator
 pkg/
 coverage/
 .bundle

bin/gitlab_changelog_generator

@@ -0,0 +1,5 @@
+#! /usr/bin/env ruby
+# frozen_string_literal: true
+
+require_relative "../lib/gitlab_changelog_generator"
+GitLabChangelogGenerator::ChangelogGenerator.new.run

lib/github_changelog_generator/generator/generator.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require "github_changelog_generator/octo_fetcher"
+require "github_changelog_generator/gitlab_fetcher"
 require "github_changelog_generator/generator/generator_fetcher"
 require "github_changelog_generator/generator/generator_processor"
 require "github_changelog_generator/generator/generator_tags"
@@ -34,7 +35,7 @@ class Generator
  def initialize(options = {})
  @options = options
  @tag_times_hash = {}
- @fetcher = GitHubChangelogGenerator::OctoFetcher.new(options)
+ @fetcher = options[:gitlab] ? GitLabChangelogGenerator::GitlabFetcher.new(options) : GitHubChangelogGenerator::OctoFetcher.new(options)
  @sections = []
  end
 

lib/github_changelog_generator/generator/generator_fetcher.rb

@@ -10,7 +10,8 @@ def fetch_events_for_issues_and_pr
  print "Fetching events for issues and PR: 0/#{@issues.count + @pull_requests.count}\r" if options[:verbose]
 
  # Async fetching events:
- @fetcher.fetch_events_async(@issues + @pull_requests)
+ @fetcher.fetch_events_async(@issues)
+ @fetcher.fetch_events_async(@pull_requests)
  end
 
  # Async fetching of all tags dates
@@ -73,9 +74,11 @@ def associate_tagged_prs(tags, prs, total)
  # fetch that. See
  # https://developer.github.com/v3/pulls/#get-a-single-pull-request vs.
  # https://developer.github.com/v3/pulls/#list-pull-requests
- if pr["events"] && (event = pr["events"].find { |e| e["event"] == "merged" })
+ # gitlab API has this
+ merge_commit_sha = try_merge_commit_sha_from_gitlab(pr)
+ if merge_commit_sha
  # Iterate tags.reverse (oldest to newest) to find first tag of each PR.
- if (oldest_tag = tags.reverse.find { |tag| tag["shas_in_tag"].include?(event["commit_id"]) })
+ if (oldest_tag = tags.reverse.find { |tag| tag["shas_in_tag"].include?(merge_commit_sha) })
  pr["first_occurring_tag"] = oldest_tag["name"]
  found = true
  i += 1
@@ -95,6 +98,16 @@ def associate_tagged_prs(tags, prs, total)
  end
  end
 
+ def try_merge_commit_sha_from_gitlab(merge_request)
+ merge_commit_sha = nil
+ if merge_request.key?("merge_commit_sha")
+ merge_commit_sha = merge_request["merge_commit_sha"]
+ elsif merge_request["events"] && (event = merge_request["events"].find { |e| e["event"] == "merged" })
+ merge_commit_sha = event["commit_id"]
+ end
+ merge_commit_sha
+ end
+
  # Associate merged PRs by the HEAD of the release branch. If no
  # --release-branch was specified, then the github default branch is used.
  #
@@ -157,7 +170,7 @@ def associate_rebase_comment_prs(tags, prs_left, total)
  # @param [Hash] issue
  def find_closed_date_by_commit(issue)
  unless issue["events"].nil?
- # if it's PR -> then find "merged event", in case of usual issue -> fond closed date
+ # if it's PR -> then find "merged event", in case of usual issue -> find closed date
  compare_string = issue["merged_at"].nil? ? "closed" : "merged"
  # reverse! - to find latest closed event. (event goes in date order)
  issue["events"].reverse!.each do |event|