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require 'zlib'
class BareRepoOperations
# The ID of empty tree.
# See http://stackoverflow.com/a/40884093/1856239 and https://github.com/git/git/blob/3ad8b5bf26362ac67c9020bf8c30eee54a84f56d/cache.h#L1011-L1012
EMPTY_TREE_ID = '4b825dc642cb6eb9a060e54bf8d69288fbee4904'.freeze
include Gitlab::Popen
def initialize(path_to_repo)
@path_to_repo = path_to_repo
end
# Based on https://stackoverflow.com/a/25556917/1856239
def commit_file(file, dst_path, branch = 'master')
head_id = execute(['show', '--format=format:%H', '--no-patch', branch], allow_failure: true)[0] || EMPTY_TREE_ID
execute(['read-tree', '--empty'])
execute(['read-tree', head_id])
blob_id = execute(['hash-object', '--stdin', '-w']) do |stdin|
stdin.write(file.read)
end
execute(['update-index', '--add', '--cacheinfo', '100644', blob_id[0], dst_path])
tree_id = execute(['write-tree'])
commit_tree_args = ['commit-tree', tree_id[0], '-m', "Add #{dst_path}"]
commit_tree_args += ['-p', head_id] unless head_id == EMPTY_TREE_ID
commit_id = execute(commit_tree_args)
execute(['update-ref', "refs/heads/#{branch}", commit_id[0]])
end
private
def execute(args, allow_failure: false)
output, status = popen(base_args + args, nil) do |stdin|
yield stdin if block_given?
end
unless status.zero?
if allow_failure
return []
else
raise "Got a non-zero exit code while calling out `#{args.join(' ')}`: #{output}"
end
end
output.split("\n")
end
def base_args
[
Gitlab.config.git.bin_path,
"--git-dir=#{@path_to_repo}"
]
end
end
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