This has never been built and shipped as part of git-annex,
and including it as a pedagolical example in
the source code doesn't have much benefit. The program was not currently
buildable after recent OsPath changes.
Of course, Git/UnionMerge.hs is still available and can be used.
The test suite was failing because of a bug in the Database/* modules.
I had replaced doesPathExist with doesDirectoryExist, but it was
checking the database file.
I have audited commit f1ba21d698 for
other changes to doesPathExist, and checked that doesDirectoryExist and
doesFileExist were used correctly.
The only change I found is in youtubeDl', where it used to return
directories that might have been created by youtube-dl. But it was
supposed to return media files, so changing it to use doesFileExist is
actually an improvement. Although only of theoretical benefit.
Note that it would actually be possible to keep using doesPathExist,
there is a version of that for OsPath as well. But the rest of these
changes seem safe.
Sponsored-by: Nicholas Golder-Manning
And without ospath build flag as a consequence.
This is a temporary fix to build failures on the github CI for Windows
and OSX, which use too old a version of stack to support the nightly
ghc.
I have sent a patch to those workflows, and after it is applied, this
can be reverted.
However, filepath-bytestring is still in Setup-Depends.
That's because Utility.OsPath uses it when not built with OsPath.
It would be maybe possible to make Utility.OsPath fall back to using
filepath, and eliminate that dependency too, but it would mean either
wrapping all of System.FilePath's functions, or using `type OsPath = FilePath`
Annex.Import uses ifdefs to avoid converting back to FilePath when not
on windows. On windows it's a bit slower due to that conversion.
Utility.Path.Windows.convertToWindowsNativeNamespace got a bit
slower too, but not really worth optimising I think.
Note that importing Utility.FileSystemEncoding at the same time as
System.Posix.ByteString will result in conflicting definitions for
RawFilePath. filepath-bytestring avoids that by importing RawFilePath
from System.Posix.ByteString, but that's not possible in
Utility.FileSystemEncoding, since Setup-Depends does not include unix.
This turned out not to affect any code in git-annex though.
Sponsored-by: Leon Schuermann
While some RawFilePath and FilePath remain, this converts most of
git-annex to using OsPath.
(When built without the OsPath build flag, is falls back to using
type OsPath = RawFilePath.)
The goals are
1) improved performance by using OsPath end-to-end when possible
2) potentially avoiding memory use problems caused by pinned strict
ByteString, since OsPath uses ShortByteString
3) eventually eliminating the filepath-bytestring dependency so I don't
need to keep maintaining that library
(this doesn't get all the way, but close)
4) generally improved type safety, since OsPath is a newtype, while
FilePath and RawFilePath are just type aliaes.
This is the result of a type checker driven process. I started by
converting from System.Directory to System.Directory.OsPath, and from
System.FilePath to System.OsPath. Then I fixed all the compile errors,
which took 3 weeks of work.
Unfortunately, there are several test suite failures at this point.
Also, it only has been built on linux, on windows and OSX there are
probably ifdefs whose code still needs to be converted.
Note that there is a parallel line of commits, starting with
05bdce328d
which is the incremental progress as I worked on this. It will be merged
with this commit. In some cases, commits in that line explain in more
details the reasons for some specific changes.
Oops, in 0b9e9cbf70 I lost takeDirectory
in several places.
With this fixed, the test suite no longer utterly blows up, but still
fails in 7 places due to other bugs introduced in the OsPath conversion.
Sponsored-by: Graham Spencer
