class Bundler::Source::Git::GitProxy

def allow?
  @git ? @git.allow_git_ops? : true
end

def allowed_in_path
  return in_path { yield } if allow?
  raise GitError, "The git source #{uri} is not yet checked out. Please run `bundle install` before trying to start your application"
end

def branch
  @branch ||= allowed_in_path do
    git("rev-parse --abbrev-ref HEAD").strip
  end
end

def capture_and_filter_stderr(uri)
  return_value, captured_err = ""
  backup_stderr = STDERR.dup
  begin
    Tempfile.open("captured_stderr") do |f|
      STDERR.reopen(f)
      return_value = yield
      f.rewind
      captured_err = f.read
    end
  ensure
    STDERR.reopen backup_stderr
  end
  $stderr.puts URICredentialsFilter.credential_filtered_string(captured_err, uri) if uri && !captured_err.empty?
  return_value
end

def checkout
  return if path.exist? && has_revision_cached?
  extra_ref = "#{Shellwords.shellescape(ref)}:#{Shellwords.shellescape(ref)}" if ref && ref.start_with?("refs/")
  Bundler.ui.info "Fetching #{URICredentialsFilter.credential_filtered_uri(uri)}"
  unless path.exist?
    SharedHelpers.filesystem_access(path.dirname) do |p|
      FileUtils.mkdir_p(p)
    end
    git_retry %(clone #{uri_escaped_with_configured_credentials} "#{path}" --bare --no-hardlinks --quiet)
    return unless extra_ref
  end
  in_path do
    git_retry %(fetch --force --quiet --tags #{uri_escaped_with_configured_credentials} "refs/heads/*:refs/heads/*" #{extra_ref})
  end
end

def configured_uri_for(uri)
  if /https?:/ =~ uri
    remote = URI(uri)
    config_auth = Bundler.settings[remote.to_s] || Bundler.settings[remote.host]
    remote.userinfo ||= config_auth
    remote.to_s
  else
    uri
  end
end

def contains?(commit)
  allowed_in_path do
    result = git_null("branch --contains #{commit}")
    $? == 0 && result =~ /^\* (.*)$/
  end
end

def copy_to(destination, submodules = false)
  # method 1
  unless File.exist?(destination.join(".git"))
    begin
      SharedHelpers.filesystem_access(destination.dirname) do |p|
        FileUtils.mkdir_p(p)
      end
      SharedHelpers.filesystem_access(destination) do |p|
        FileUtils.rm_rf(p)
      end
      git_retry %(clone --no-checkout --quiet "#{path}" "#{destination}")
      File.chmod(((File.stat(destination).mode | 0o777) & ~File.umask), destination)
    rescue Errno::EEXIST => e
      file_path = e.message[%r{.*?(/.*)}, 1]
      raise GitError, "Bundler could not install a gem because it needs to " \
        "create a directory, but a file exists - #{file_path}. Please delete " \
        "this file and try again."
    end
  end
  # method 2
  SharedHelpers.chdir(destination) do
    git_retry %(fetch --force --quiet --tags "#{path}")
    begin
      git "reset --hard #{@revision}"
    rescue GitCommandError
      raise MissingGitRevisionError.new(@revision, URICredentialsFilter.credential_filtered_uri(uri))
    end
    if submodules
      git_retry "submodule update --init --recursive"
    elsif Gem::Version.create(version) >= Gem::Version.create("2.9.0")
      git_retry "submodule deinit --all --force"
    end
  end
end

def find_local_revision
  allowed_in_path do
    git("rev-parse --verify #{Shellwords.shellescape(ref)}", true).strip
  end
end

def full_version
  git("--version").sub("git version", "").strip
end

def git(command, check_errors = true, error_msg = nil)
  command_with_no_credentials = URICredentialsFilter.credential_filtered_string(command, uri)
  raise GitNotAllowedError.new(command_with_no_credentials) unless allow?
  out = SharedHelpers.with_clean_git_env do
    capture_and_filter_stderr(uri) { `git #{command}` }
  end
  stdout_with_no_credentials = URICredentialsFilter.credential_filtered_string(out, uri)
  raise GitCommandError.new(command_with_no_credentials, path, error_msg) if check_errors && !$?.success?
  stdout_with_no_credentials
end

def git_null(command)
  git("#{command} 2>#{Bundler::NULL}", false)
end

def git_retry(command)
  Bundler::Retry.new("`git #{URICredentialsFilter.credential_filtered_string(command, uri)}`", GitNotAllowedError).attempts do
    git(command)
  end
end

def has_revision_cached?
  return unless @revision
  in_path { git("cat-file -e #{@revision}") }
  true
rescue GitError
  false
end

def in_path(&blk)
  checkout unless path.exist?
  _ = URICredentialsFilter # load it before we chdir
  SharedHelpers.chdir(path, &blk)
end

def initialize(path, uri, ref, revision = nil, git = nil)
  @path     = path
  @uri      = uri
  @ref      = ref
  @revision = revision
  @git      = git
  raise GitNotInstalledError.new if allow? && !Bundler.git_present?
end

def remove_cache
  FileUtils.rm_rf(path)
end

def revision
  return @revision if @revision
  begin
    @revision ||= find_local_revision
  rescue GitCommandError
    raise MissingGitRevisionError.new(ref, URICredentialsFilter.credential_filtered_uri(uri))
  end
  @revision
end

def uri_escaped_with_configured_credentials
  remote = configured_uri_for(uri)
  if Bundler::WINDOWS
    # Windows quoting requires double quotes only, with double quotes
    # inside the string escaped by being doubled.
    '"' + remote.gsub('"') { '""' } + '"'
  else
    # Bash requires single quoted strings, with the single quotes escaped
    # by ending the string, escaping the quote, and restarting the string.
    "'" + remote.gsub("'") { "'\\''" } + "'"
  end
end

def version
  git("--version").match(/(git version\s*)?((\.?\d+)+).*/)[2]
end