117 lines
3.7 KiB
Ruby
117 lines
3.7 KiB
Ruby
# frozen_string_literal: true
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module Repositories
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# A service class for generating a changelog section.
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class ChangelogService
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DEFAULT_TRAILER = 'Changelog'
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DEFAULT_FILE = 'CHANGELOG.md'
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# The `project` specifies the `Project` to generate the changelog section
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# for.
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#
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# The `user` argument specifies a `User` to use for committing the changes
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# to the Git repository.
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#
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# The `version` arguments must be a version `String` using semantic
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# versioning as the format.
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#
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# The arguments `from` and `to` must specify a Git ref or SHA to use for
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# fetching the commits to include in the changelog. The SHA/ref set in the
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# `from` argument isn't included in the list.
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#
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# The `date` argument specifies the date of the release, and defaults to the
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# current time/date.
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#
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# The `branch` argument specifies the branch to commit the changes to. The
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# branch must already exist.
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#
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# The `trailer` argument is the Git trailer to use for determining what
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# commits to include in the changelog.
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#
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# The `file` arguments specifies the name/path of the file to commit the
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# changes to. If the file doesn't exist, it's created automatically.
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#
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# The `message` argument specifies the commit message to use when committing
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# the changelog changes.
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#
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# rubocop: disable Metrics/ParameterLists
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def initialize(
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project,
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user,
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version:,
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branch: project.default_branch_or_main,
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from: nil,
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to: branch,
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date: DateTime.now,
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trailer: DEFAULT_TRAILER,
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file: DEFAULT_FILE,
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message: "Add changelog for version #{version}"
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)
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@project = project
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@user = user
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@version = version
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@from = from
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@to = to
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@date = date
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@branch = branch
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@trailer = trailer
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@file = file
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@message = message
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end
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# rubocop: enable Metrics/ParameterLists
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def execute
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config = Gitlab::Changelog::Config.from_git(@project, @user)
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from = start_of_commit_range(config)
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# For every entry we want to only include the merge request that
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# originally introduced the commit, which is the oldest merge request that
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# contains the commit. We fetch there merge requests in batches, reducing
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# the number of SQL queries needed to get this data.
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mrs_finder = MergeRequests::OldestPerCommitFinder.new(@project)
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release = Gitlab::Changelog::Release
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.new(version: @version, date: @date, config: config)
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commits =
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ChangelogCommitsFinder.new(project: @project, from: from, to: @to)
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commits.each_page(@trailer) do |page|
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mrs = mrs_finder.execute(page)
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# Preload the authors. This ensures we only need a single SQL query per
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# batch of commits, instead of needing a query for every commit.
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page.each(&:lazy_author)
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page.each do |commit|
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release.add_entry(
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title: commit.title,
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commit: commit,
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category: commit.trailers.fetch(@trailer),
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author: commit.author,
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merge_request: mrs[commit.id]
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)
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end
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end
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Gitlab::Changelog::Committer
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.new(@project, @user)
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.commit(release: release, file: @file, branch: @branch, message: @message)
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end
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def start_of_commit_range(config)
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return @from if @from
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finder = ChangelogTagFinder.new(@project, regex: config.tag_regex)
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if (prev_tag = finder.execute(@version))
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return prev_tag.target_commit.id
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end
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raise(
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Gitlab::Changelog::Error,
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'The commit start range is unspecified, and no previous tag ' \
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'could be found to use instead'
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)
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end
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end
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end
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