Changelog for path-io-1.6.1

Path IO 1.6.1

Changed how copyDirRecur and copyDirRecur' functions work. Previously, the functions created empty directories in the destination directory when the source directory contained directory symlinks. The symlinked directories were not recursively traversed. It also copied symlinked files creating normal regular files in the target directory as the result. This is fixed so that the function now behaves much like the cp utility, not traversing symlinked directories, but recreating symlinks in the target directory according to their targets in the source directory.
Fixed a bug in createDirLink which would always fail complaining that its destination location does not exist.
Dropped support for GHC 8.2.

Dropped support for GHC 8.0 and older.
Added new functions: getXdgDirList, createFileLink, createDirLink, removeDirLink, getSymlinkTarget.

Fixed various bugs in listDirRecurRel, walkDirRel, and walkDirAccumRel and clarified their behavior in the docs.

Fixed a bug in walkDirRel that resulted in NotAProperPrefix exception every time the function was called.

Added relative versions of some actions: listDirRel, listDirRecurRel, walkDirRel, and walkDirAccumRel.
Dropped support for GHC 7.8.

Reduce a number of (MonadIO m, MonadThrow m) constraints to just MonadIO m #27

Change the default behavior of recursive traversal APIs to not follow symbolic links. The change affects the following functions: listDirRecur, copyDirRecur, and copyDirRecur'.
Add isSymlink which allows to test whether a path is a symbolic link.
Move the type functions AbsPath and RelPath to the AnyPath type class (previously they were standalone closed type families, now they are associated types of AnyPath).
Improved the documentation and metadata.

Fixed a bug in setModificationTime function that previously called setAccessTime instead of setModificationTime from directory.
Added notes to all pieces of API that are conditional (some functions are only available if directory-1.2.3.0 or later is used, now it's mentioned for every such function explicitely).

Added walkDir function to traverse a directory tree with a handler.
Added walkDirAccum function which is like walkDir but also accepts an output writer and returns the accumulated output.
All recursive traversal functions (existing and new) now safely handle directory loops due to symbolic or hard links.
Added “since” notes to public functions in API.

Fixed bug in copyDirRecur when it was unable to fully copy read-only directories.
Added copyDirRecur' function that works just like copyDirRecur, but does not preserve directory permissions.

Fixed bug in copyDirRecur for non-existing destination paths when directory to copy does not contain sub-directories.
Made copyDirRecur try to copy permissions for destination directory too (previously it only tried to copy them for sub-directories).

Changed signature of getAppUserDataDir, so it takes String as the first argument.
Removed deprecated forgivingAbsence' function.
Made findFile lazier, it stops searching as soon as a file is found.
Added some tests.

Introduced synonym for forgivingAbsence' — ignoringAbsence. forgivingAbsence' is deprecated now, but it's still there.
Added a handy shortcut ensureDir that is defined as ensureDir = createDirIfMissing True.
Made getHomeDir and getTempDir more robust when they are influenced by values of environment variables.

Added forgivingAbsence, resolveFile, and resolveDir functions, so the package now provides all functionality that Path.IO module in Stack has.
Added closed type family RelPath, makeRelative, and makeRelativeToCurrentDir functions.
Fixed signature of getAppUserDataDir.

Added functions from temporary: withTempFile, withTempDir, withSystemTempFile, withSystemTempDir, openTempFile, openBinaryTempFile, and createTempDir. temporary is a lightweight and ubiquitous package, so depending on it should be OK.