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module MergeRequests
class BuildService < MergeRequests::BaseService
def execute
@issue_iid = params.delete(:issue_iid)
self.merge_request = MergeRequest.new(params)
merge_request.compare_commits = []
merge_request.source_project = find_source_project
merge_request.target_project = find_target_project
merge_request.target_branch = find_target_branch
merge_request.can_be_created = branches_valid?
# compare branches only if branches are valid, otherwise
# compare_branches may raise an error
if merge_request.can_be_created
compare_branches
assign_title_and_description
end
merge_request
end
private
attr_accessor :merge_request
delegate :target_branch,
:target_branch_ref,
:target_project,
:source_branch,
:source_branch_ref,
:source_project,
:compare_commits,
:wip_title,
:description,
:errors,
to: :merge_request
def find_source_project
return source_project if source_project.present? && can?(current_user, :read_project, source_project)
project
end
def find_target_project
return target_project if target_project.present? && can?(current_user, :read_project, target_project)
project.default_merge_request_target
end
def find_target_branch
target_branch || target_project.default_branch
end
def source_branch_specified?
params[:source_branch].present?
end
def target_branch_specified?
params[:target_branch].present?
end
def branches_valid?
return false unless source_branch_specified? || target_branch_specified?
validate_branches
errors.blank?
end
def compare_branches
compare = CompareService.new(
source_project,
source_branch_ref
).execute(
target_project,
target_branch_ref
)
if compare
merge_request.compare_commits = compare.commits
merge_request.compare = compare
end
end
def validate_branches
add_error('You must select source and target branch') unless branches_present?
add_error('You must select different branches') if same_source_and_target?
add_error("Source branch \"#{source_branch}\" does not exist") unless source_branch_exists?
add_error("Target branch \"#{target_branch}\" does not exist") unless target_branch_exists?
end
def add_error(message)
errors.add(:base, message)
end
def branches_present?
target_branch.present? && source_branch.present?
end
def same_source_and_target?
source_project == target_project && target_branch == source_branch
end
def source_branch_exists?
source_branch.blank? || source_project.commit(source_branch)
end
def target_branch_exists?
target_branch.blank? || target_project.commit(target_branch)
end
# When your branch name starts with an iid followed by a dash this pattern will be
# interpreted as the user wants to close that issue on this project.
#
# For example:
# - Issue 112 exists, title: Emoji don't show up in commit title
# - Source branch is: 112-fix-mep-mep
#
# Will lead to:
# - Appending `Closes #112` to the description
# - Setting the title as 'Resolves "Emoji don't show up in commit title"' if there is
# more than one commit in the MR
#
def assign_title_and_description
assign_title_and_description_from_single_commit
assign_title_from_issue
merge_request.title ||= source_branch.titleize.humanize
merge_request.title = wip_title if compare_commits.empty?
append_closes_description
end
def append_closes_description
return unless issue_iid
closes_issue = "Closes ##{issue_iid}"
if description.present?
merge_request.description += closes_issue.prepend("\n\n")
else
merge_request.description = closes_issue
end
end
def assign_title_and_description_from_single_commit
commits = compare_commits
return unless commits&.count == 1
commit = commits.first
merge_request.title ||= commit.title
merge_request.description ||= commit.description.try(:strip)
end
def assign_title_from_issue
return unless issue && issue.is_a?(Issue)
merge_request.title = "Resolve \"#{issue.title}\""
end
def issue_iid
@issue_iid ||= source_branch.match(/\A(\d+)-/).try(:[], 1)
end
def issue
@issue ||= target_project.get_issue(issue_iid, current_user)
end
end
end
|
