git-annex/Utility/CopyFile.hs
Joey Hess 38d691a10f
removed the old Android app
Running git-annex linux builds in termux seems to work well enough that the
only reason to keep the Android app would be to support Android 4-5, which
the old Android app supported, and which I don't know if the termux method
works on (although I see no reason why it would not).
According to [1], Android 4-5 remains on around 29% of devices, down from
51% one year ago.

[1] https://www.statista.com/statistics/271774/share-of-android-platforms-on-mobile-devices-with-android-os/

This is a rather large commit, but mostly very straightfoward removal of
android ifdefs and patches and associated cruft.

Also, removed support for building with very old ghc < 8.0.1, and with
yesod < 1.4.3, and without concurrent-output, which were only being used
by the cross build.

Some documentation specific to the Android app (screenshots etc) needs
to be updated still.

This commit was sponsored by Brett Eisenberg on Patreon.
2018-10-13 01:41:11 -04:00

51 lines
1.4 KiB
Haskell

{- file copying
-
- Copyright 2010-2014 Joey Hess <id@joeyh.name>
-
- License: BSD-2-clause
-}
module Utility.CopyFile (
copyFileExternal,
createLinkOrCopy,
CopyMetaData(..)
) where
import Common
import qualified BuildInfo
data CopyMetaData
-- Copy timestamps when possible, but no other metadata, and
-- when copying a symlink, makes a copy of its content.
= CopyTimeStamps
-- Copy all metadata when possible.
| CopyAllMetaData
deriving (Eq)
{- The cp command is used, because I hate reinventing the wheel,
- and because this allows easy access to features like cp --reflink. -}
copyFileExternal :: CopyMetaData -> FilePath -> FilePath -> IO Bool
copyFileExternal meta src dest = do
whenM (doesFileExist dest) $
removeFile dest
boolSystem "cp" $ params ++ [File src, File dest]
where
params = map snd $ filter fst
[ (BuildInfo.cp_reflink_auto, Param "--reflink=auto")
, (allmeta && BuildInfo.cp_a, Param "-a")
, (allmeta && BuildInfo.cp_p && not BuildInfo.cp_a
, Param "-p")
, (not allmeta && BuildInfo.cp_preserve_timestamps
, Param "--preserve=timestamps")
]
allmeta = meta == CopyAllMetaData
{- Create a hard link if the filesystem allows it, and fall back to copying
- the file. -}
createLinkOrCopy :: FilePath -> FilePath -> IO Bool
createLinkOrCopy src dest = go `catchIO` const fallback
where
go = do
createLink src dest
return True
fallback = copyFileExternal CopyAllMetaData src dest