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|
module Gitlab
module Satellite
# GitLab server-side merge
class MergeAction < Action
attr_accessor :merge_request
def initialize(user, merge_request)
super user, merge_request.target_project
@merge_request = merge_request
end
# Checks if a merge request can be executed without user interaction
def can_be_merged?
in_locked_and_timed_satellite do |merge_repo|
prepare_satellite!(merge_repo)
merge_in_satellite!(merge_repo)
end
end
# Merges the source branch into the target branch in the satellite and
# pushes it back to the repository.
# It also removes the source branch if requested in the merge request (and this is permitted by the merge request).
#
# Returns false if the merge produced conflicts
# Returns false if pushing from the satellite to the repository failed or was rejected
# Returns true otherwise
def merge!(merge_commit_message = nil)
in_locked_and_timed_satellite do |merge_repo|
prepare_satellite!(merge_repo)
if merge_in_satellite!(merge_repo, merge_commit_message)
# push merge back to bare repo
# will raise CommandFailed when push fails
merge_repo.git.push(default_options, :origin, merge_request.target_branch)
# remove source branch
if merge_request.should_remove_source_branch && !project.root_ref?(merge_request.source_branch) && !merge_request.for_fork?
# will raise CommandFailed when push fails
merge_repo.git.push(default_options, :origin, ":#{merge_request.source_branch}")
end
# merge, push and branch removal successful
true
end
end
rescue Grit::Git::CommandFailed => ex
handle_exception(ex)
end
def diff_in_satellite
in_locked_and_timed_satellite do |merge_repo|
prepare_satellite!(merge_repo)
update_satellite_source_and_target!(merge_repo)
# Only show what is new in the source branch compared to the target branch, not the other way around.
# The line below with merge_base is equivalent to diff with three dots (git diff branch1...branch2)
# From the git documentation: "git diff A...B" is equivalent to "git diff $(git-merge-base A B) B"
common_commit = merge_repo.git.native(:merge_base, default_options, ["origin/#{merge_request.target_branch}", "source/#{merge_request.source_branch}"]).strip
merge_repo.git.native(:diff, default_options, common_commit, "source/#{merge_request.source_branch}")
end
rescue Grit::Git::CommandFailed => ex
handle_exception(ex)
end
def diffs_between_satellite
in_locked_and_timed_satellite do |merge_repo|
prepare_satellite!(merge_repo)
update_satellite_source_and_target!(merge_repo)
if merge_request.for_fork?
repository = Gitlab::Git::Repository.new(merge_repo.path)
diffs = Gitlab::Git::Diff.between(
repository,
"source/#{merge_request.source_branch}",
"origin/#{merge_request.target_branch}"
)
else
raise "Attempt to determine diffs between for a non forked merge request in satellite MergeRequest.id:[#{merge_request.id}]"
end
return diffs
end
rescue Grit::Git::CommandFailed => ex
handle_exception(ex)
end
# Get commit as an email patch
def format_patch
in_locked_and_timed_satellite do |merge_repo|
prepare_satellite!(merge_repo)
update_satellite_source_and_target!(merge_repo)
patch = merge_repo.git.format_patch(default_options({ stdout: true }), "origin/#{merge_request.target_branch}..source/#{merge_request.source_branch}")
end
rescue Grit::Git::CommandFailed => ex
handle_exception(ex)
end
# Retrieve an array of commits between the source and the target
def commits_between
in_locked_and_timed_satellite do |merge_repo|
prepare_satellite!(merge_repo)
update_satellite_source_and_target!(merge_repo)
if merge_request.for_fork?
repository = Gitlab::Git::Repository.new(merge_repo.path)
commits = Gitlab::Git::Commit.between(
repository,
"origin/#{merge_request.target_branch}",
"source/#{merge_request.source_branch}"
)
else
raise "Attempt to determine commits between for a non forked merge request in satellite MergeRequest.id:[#{merge_request.id}]"
end
return commits
end
rescue Grit::Git::CommandFailed => ex
handle_exception(ex)
end
private
# Merges the source_branch into the target_branch in the satellite.
#
# Note: it will clear out the satellite before doing anything
#
# Returns false if the merge produced conflicts
# Returns true otherwise
def merge_in_satellite!(repo, message = nil)
update_satellite_source_and_target!(repo)
message ||= "Merge branch '#{merge_request.source_branch}' into '#{merge_request.target_branch}'"
# merge the source branch into the satellite
# will raise CommandFailed when merge fails
repo.git.merge(default_options({ no_ff: true }), "-m#{message}", "source/#{merge_request.source_branch}")
rescue Grit::Git::CommandFailed => ex
handle_exception(ex)
end
# Assumes a satellite exists that is a fresh clone of the projects repo, prepares satellite for merges, diffs etc
def update_satellite_source_and_target!(repo)
repo.remote_add('source', merge_request.source_project.repository.path_to_repo)
repo.remote_fetch('source')
repo.git.checkout(default_options({ b: true }), merge_request.target_branch, "origin/#{merge_request.target_branch}")
rescue Grit::Git::CommandFailed => ex
handle_exception(ex)
end
end
end
end
|
