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module MergeRequests
class BuildService < MergeRequests::BaseService
def execute
merge_request = MergeRequest.new(params)
# Set MR attributes
merge_request.can_be_created = false
merge_request.compare_failed = false
merge_request.compare_commits = []
merge_request.compare_diffs = []
merge_request.source_project = project unless merge_request.source_project
merge_request.target_project ||= (project.forked_from_project || project)
merge_request.target_branch ||= merge_request.target_project.default_branch
unless merge_request.target_branch && merge_request.source_branch
return build_failed(merge_request, nil)
end
compare_result = CompareService.new.execute(
current_user,
merge_request.source_project,
merge_request.source_branch,
merge_request.target_project,
merge_request.target_branch,
)
commits = compare_result.commits
# At this point we decide if merge request can be created
# If we have at least one commit to merge -> creation allowed
if commits.present?
merge_request.compare_commits = Commit.decorate(commits, merge_request.source_project)
merge_request.can_be_created = true
merge_request.compare_failed = false
# Try to collect diff for merge request.
diffs = compare_result.diffs
if diffs.present?
merge_request.compare_diffs = diffs
elsif diffs == false
merge_request.can_be_created = false
merge_request.compare_failed = true
end
else
merge_request.can_be_created = false
merge_request.compare_failed = false
end
commits = merge_request.compare_commits
if commits && commits.count == 1
commit = commits.first
merge_request.title = commit.title
merge_request.description = commit.description.try(:strip)
else
merge_request.title = merge_request.source_branch.titleize.humanize
end
merge_request
end
def build_failed(merge_request, message)
merge_request.errors.add(:base, message) unless message.nil?
merge_request.compare_commits = []
merge_request.can_be_created = false
merge_request
end
end
end
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