%  Copyright (C) 2005 Florian Weimer
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\subsubsection{darcs show files}
\label{show-files}
\begin{code}
module Darcs.Commands.ShowFiles ( show_files, show_manifest ) where
import Darcs.Arguments ( DarcsFlag(..), working_repo_dir,
                        files, directories, pending, nullFlag )
import Darcs.Commands ( DarcsCommand(..), nodefaults, command_alias )
import Darcs.Repository ( Repository, amInRepository, slurp_pending, slurp_recorded,
                          withRepository )
import Darcs.Patch ( RepoPatch )
import Darcs.SlurpDirectory ( Slurpy, list_slurpy, list_slurpy_files, list_slurpy_dirs )
\end{code}

\options{show files}

\haskell{show_files_help}

By default (and if the \verb!--pending! option is specified),
the effect of pending patches on the repository is taken into account.
In other words, if you add a file using {\tt darcs add}, it
immediately appears in the output of {\tt query manifest}, even if it
is not yet recorded.  If you specify the \verb!--no-pending! option,
{\tt query manifest} will only list recorded files (and directories).

The \verb!--files! and \verb!--directories! options control whether
files and directories are included in the output.  The
\verb!--no-files!  and \verb!--no-directories! options have the
reverse effect.  The default is to include files, but not directories.

If you specify the \verb!--null! option, the file names are written to
standard output in unescaped form, and separated by ASCII NUL bytes.
This format is suitable for further automatic processing (for example,
using \verb!xargs -0!).

\begin{code}
show_files_description :: String
show_files_description = "Show version-controlled files in the working copy."
\end{code}

\begin{code}
show_files_help :: String
show_files_help =
 "The files command lists the version-controlled files in the\n"++
 "working copy.  The similar manifest command, lists the same\n"++
 "files, excluding any directories.\n"
\end{code}

\begin{code}
show_files :: DarcsCommand
show_files = DarcsCommand {
  command_name = "files",
  command_help = show_files_help,
  command_description = show_files_description,
  command_extra_args = 0,
  command_extra_arg_help = [],
  command_command = manifest_cmd to_list_files,
  command_prereq = amInRepository,
  command_get_arg_possibilities = return [],
  command_argdefaults = nodefaults,
  command_advanced_options = [],
  command_basic_options = [files, directories, pending, nullFlag,
                          working_repo_dir] }

show_manifest :: DarcsCommand
show_manifest = command_alias "manifest" show_files {
  command_command = manifest_cmd to_list_manifest
}

to_list_files, to_list_manifest :: [DarcsFlag] -> Slurpy -> [FilePath]
to_list_files    opts = files_dirs (NoFiles `notElem` opts) (NoDirectories `notElem` opts)
to_list_manifest opts = files_dirs (NoFiles `notElem` opts) (Directories `elem` opts)

files_dirs :: Bool -> Bool -> Slurpy -> [FilePath]
files_dirs False False = \_ -> []
files_dirs False True  = list_slurpy_dirs
files_dirs True  False = list_slurpy_files
files_dirs True  True  = list_slurpy

manifest_cmd :: ([DarcsFlag] -> Slurpy -> [FilePath]) -> [DarcsFlag] -> [String] -> IO ()
manifest_cmd to_list opts _ = do
    list <- (to_list opts) `fmap` withRepository opts slurp
    mapM_ output list
    where slurp :: RepoPatch p => Repository p -> IO Slurpy
          slurp = if NoPending `notElem` opts
                  then slurp_pending else slurp_recorded
          output_null name = do { putStr name ; putChar '\0' }
          output = if NullFlag `elem` opts then output_null else putStrLn
\end{code}