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module Gitlab
module Git
module Conflict
class Resolver
ConflictSideMissing = Class.new(StandardError)
ResolutionError = Class.new(StandardError)
def initialize(repository, our_commit, target_repository, their_commit)
@repository = repository
@our_commit = our_commit.rugged_commit
@target_repository = target_repository
@their_commit = their_commit.rugged_commit
end
def conflicts
@conflicts ||= begin
target_index = @target_repository.rugged.merge_commits(@our_commit, @their_commit)
# We don't need to do `with_repo_branch_commit` here, because the target
# project always fetches source refs when creating merge request diffs.
target_index.conflicts.map do |conflict|
raise ConflictSideMissing unless conflict[:theirs] && conflict[:ours]
Gitlab::Git::Conflict::File.new(
@target_repository,
@our_commit.oid,
conflict,
target_index.merge_file(conflict[:ours][:path])[:data]
)
end
end
end
def resolve_conflicts(user, files, source_branch:, target_branch:, commit_message:)
@repository.with_repo_branch_commit(@target_repository, target_branch) do
files.each do |file_params|
conflict_file = conflict_for_path(file_params[:old_path], file_params[:new_path])
write_resolved_file_to_index(conflict_file, file_params)
end
unless index.conflicts.empty?
missing_files = index.conflicts.map { |file| file[:ours][:path] }
raise ResolutionError, "Missing resolutions for the following files: #{missing_files.join(', ')}"
end
commit_params = {
message: commit_message,
parents: [@our_commit, @their_commit].map(&:oid)
}
@repository.commit_index(user, source_branch, index, commit_params)
end
end
def conflict_for_path(old_path, new_path)
conflicts.find do |conflict|
conflict.their_path == old_path && conflict.our_path == new_path
end
end
private
# We can only write when getting the merge index from the source
# project, because we will write to that project. We don't use this all
# the time because this fetches a ref into the source project, which
# isn't needed for reading.
def index
@index ||= @repository.rugged.merge_commits(@our_commit, @their_commit)
end
def write_resolved_file_to_index(file, params)
if params[:sections]
resolved_lines = file.resolve_lines(params[:sections])
new_file = resolved_lines.map { |line| line[:full_line] }.join("\n")
new_file << "\n" if file.our_blob.data.end_with?("\n")
elsif params[:content]
new_file = file.resolve_content(params[:content])
end
our_path = file.our_path
index.add(path: our_path, oid: @repository.rugged.write(new_file, :blob), mode: file.our_mode)
index.conflict_remove(our_path)
end
end
end
end
end
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