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module Gitlab
module Git
class Index
IndexError = Class.new(StandardError)
DEFAULT_MODE = 0o100644
ACTIONS = %w(create create_dir update move delete).freeze
attr_reader :repository, :raw_index
def initialize(repository)
@repository = repository
@raw_index = repository.rugged.index
end
delegate :read_tree, :get, to: :raw_index
def write_tree
raw_index.write_tree(repository.rugged)
end
def dir_exists?(path)
raw_index.find { |entry| entry[:path].start_with?("#{path}/") }
end
def create(options)
options = normalize_options(options)
if get(options[:file_path])
raise IndexError, "A file with this name already exists"
end
add_blob(options)
end
def create_dir(options)
options = normalize_options(options)
if get(options[:file_path])
raise IndexError, "A file with this name already exists"
end
if dir_exists?(options[:file_path])
raise IndexError, "A directory with this name already exists"
end
options = options.dup
options[:file_path] += '/.gitkeep'
options[:content] = ''
add_blob(options)
end
def update(options)
options = normalize_options(options)
file_entry = get(options[:file_path])
unless file_entry
raise IndexError, "A file with this name doesn't exist"
end
add_blob(options, mode: file_entry[:mode])
end
def move(options)
options = normalize_options(options)
file_entry = get(options[:previous_path])
unless file_entry
raise IndexError, "A file with this name doesn't exist"
end
if get(options[:file_path])
raise IndexError, "A file with this name already exists"
end
raw_index.remove(options[:previous_path])
add_blob(options, mode: file_entry[:mode])
end
def delete(options)
options = normalize_options(options)
unless get(options[:file_path])
raise IndexError, "A file with this name doesn't exist"
end
raw_index.remove(options[:file_path])
end
private
def normalize_options(options)
options = options.dup
options[:file_path] = normalize_path(options[:file_path]) if options[:file_path]
options[:previous_path] = normalize_path(options[:previous_path]) if options[:previous_path]
options
end
def normalize_path(path)
unless path
raise IndexError, "You must provide a file path"
end
pathname = Gitlab::Git::PathHelper.normalize_path(path.dup)
pathname.each_filename do |segment|
if segment == '..'
raise IndexError, 'Path cannot include directory traversal'
end
unless segment =~ Gitlab::Regex.file_name_regex
raise IndexError, "Path #{Gitlab::Regex.file_name_regex_message}"
end
end
pathname.to_s
end
def add_blob(options, mode: nil)
content = options[:content]
unless content
raise IndexError, "You must provide content"
end
content = Base64.decode64(content) if options[:encoding] == 'base64'
detect = CharlockHolmes::EncodingDetector.new.detect(content)
unless detect && detect[:type] == :binary
# When writing to the repo directly as we are doing here,
# the `core.autocrlf` config isn't taken into account.
content.gsub!("\r\n", "\n") if repository.autocrlf
end
oid = repository.rugged.write(content, :blob)
raw_index.add(path: options[:file_path], oid: oid, mode: mode || DEFAULT_MODE)
rescue Rugged::IndexError => e
raise IndexError, e.message
end
end
end
end
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