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# frozen_string_literal: true
module MergeRequests
class SquashService
include BaseServiceUtility
include MergeRequests::ErrorLogger
def initialize(merge_request:, current_user:, commit_message:)
@merge_request = merge_request
@target_project = merge_request.target_project
@current_user = current_user
@commit_message = commit_message
end
def execute
# If performing a squash would result in no change, then
# immediately return a success message without performing a squash
if merge_request.commits_count == 1 && message&.strip == merge_request.first_commit.safe_message&.strip
return success(squash_sha: merge_request.diff_head_sha)
end
return error(s_("MergeRequests|Squashing not allowed: This project doesn't allow you to squash commits when merging.")) if squash_forbidden?
squash! || error(s_('MergeRequests|Squashing failed: Squash the commits locally, resolve any conflicts, then push the branch.'))
end
private
attr_reader :merge_request, :target_project, :current_user, :commit_message
def squash!
squash_sha = repository.squash(current_user, merge_request, message)
success(squash_sha: squash_sha)
rescue StandardError => e
log_error(exception: e, message: 'Failed to squash merge request')
false
end
def squash_forbidden?
target_project.squash_never?
end
def repository
target_project.repository
end
def message
commit_message.presence || merge_request.default_squash_commit_message(user: current_user)
end
end
end
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