add typesafe std/paths, std/files, std/dirs, std/symlinks (#20582)
* split std/os; add typesafe std/paths * add more files, dirs, paths * add documentation * add testcase * remove tryRemoveFile * clean up * Delete test.nim * apply changes * add `add` and fixes
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177
lib/std/dirs.nim
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177
lib/std/dirs.nim
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from paths import Path, ReadDirEffect, WriteDirEffect
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from std/private/osdirs import dirExists, createDir, existsOrCreateDir, removeDir,
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moveDir, walkPattern, walkFiles, walkDirs, walkDir,
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walkDirRec, PathComponent
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export PathComponent
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proc dirExists*(dir: Path): bool {.inline, tags: [ReadDirEffect].} =
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## Returns true if the directory `dir` exists. If `dir` is a file, false
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## is returned. Follows symlinks.
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result = dirExists(dir.string)
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proc createDir*(dir: Path) {.inline, tags: [WriteDirEffect, ReadDirEffect].} =
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## Creates the `directory`:idx: `dir`.
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##
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## The directory may contain several subdirectories that do not exist yet.
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## The full path is created. If this fails, `OSError` is raised.
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##
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## It does **not** fail if the directory already exists because for
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## most usages this does not indicate an error.
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##
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## See also:
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## * `removeDir proc`_
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## * `existsOrCreateDir proc`_
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## * `copyDir proc`_
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## * `copyDirWithPermissions proc`_
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## * `moveDir proc`_
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createDir(dir.string)
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proc existsOrCreateDir*(dir: Path): bool {.inline, tags: [WriteDirEffect, ReadDirEffect].} =
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## Checks if a `directory`:idx: `dir` exists, and creates it otherwise.
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##
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## Does not create parent directories (raises `OSError` if parent directories do not exist).
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## Returns `true` if the directory already exists, and `false` otherwise.
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##
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## See also:
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## * `removeDir proc`_
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## * `createDir proc`_
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## * `copyDir proc`_
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## * `copyDirWithPermissions proc`_
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## * `moveDir proc`_
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result = existsOrCreateDir(dir.string)
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proc removeDir*(dir: Path, checkDir = false
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) {.inline, tags: [WriteDirEffect, ReadDirEffect].} =
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## Removes the directory `dir` including all subdirectories and files
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## in `dir` (recursively).
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##
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## If this fails, `OSError` is raised. This does not fail if the directory never
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## existed in the first place, unless `checkDir` = true.
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##
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## See also:
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## * `removeFile proc`_
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## * `existsOrCreateDir proc`_
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## * `createDir proc`_
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## * `copyDir proc`_
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## * `copyDirWithPermissions proc`_
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## * `moveDir proc`_
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removeDir(dir.string, checkDir)
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proc moveDir*(source, dest: Path) {.inline, tags: [ReadIOEffect, WriteIOEffect].} =
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## Moves a directory from `source` to `dest`.
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##
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## Symlinks are not followed: if `source` contains symlinks, they themself are
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## moved, not their target.
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##
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## If this fails, `OSError` is raised.
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##
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## See also:
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## * `moveFile proc`_
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## * `copyDir proc`_
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## * `copyDirWithPermissions proc`_
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## * `removeDir proc`_
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## * `existsOrCreateDir proc`_
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## * `createDir proc`_
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moveDir(source.string, dest.string)
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iterator walkPattern*(pattern: Path): Path {.tags: [ReadDirEffect].} =
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## Iterate over all the files and directories that match the `pattern`.
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##
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## On POSIX this uses the `glob`:idx: call.
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## `pattern` is OS dependent, but at least the `"*.ext"`
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## notation is supported.
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##
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## See also:
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## * `walkFiles iterator`_
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## * `walkDirs iterator`_
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## * `walkDir iterator`_
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## * `walkDirRec iterator`_
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for p in walkPattern(pattern.string):
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yield Path(p)
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iterator walkFiles*(pattern: Path): Path {.tags: [ReadDirEffect].} =
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## Iterate over all the files that match the `pattern`.
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##
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## On POSIX this uses the `glob`:idx: call.
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## `pattern` is OS dependent, but at least the `"*.ext"`
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## notation is supported.
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##
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## See also:
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## * `walkPattern iterator`_
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## * `walkDirs iterator`_
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## * `walkDir iterator`_
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## * `walkDirRec iterator`_
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for p in walkFiles(pattern.string):
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yield Path(p)
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iterator walkDirs*(pattern: Path): Path {.tags: [ReadDirEffect].} =
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## Iterate over all the directories that match the `pattern`.
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##
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## On POSIX this uses the `glob`:idx: call.
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## `pattern` is OS dependent, but at least the `"*.ext"`
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## notation is supported.
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##
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## See also:
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## * `walkPattern iterator`_
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## * `walkFiles iterator`_
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## * `walkDir iterator`_
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## * `walkDirRec iterator`_
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for p in walkDirs(pattern.string):
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yield Path(p)
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iterator walkDir*(dir: Path; relative = false, checkDir = false):
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tuple[kind: PathComponent, path: Path] {.tags: [ReadDirEffect].} =
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## Walks over the directory `dir` and yields for each directory or file in
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## `dir`. The component type and full path for each item are returned.
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##
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## Walking is not recursive. If ``relative`` is true (default: false)
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## the resulting path is shortened to be relative to ``dir``.
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##
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## If `checkDir` is true, `OSError` is raised when `dir`
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## doesn't exist.
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for (k, p) in walkDir(dir.string, relative, checkDir):
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yield (k, Path(p))
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iterator walkDirRec*(dir: Path,
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yieldFilter = {pcFile}, followFilter = {pcDir},
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relative = false, checkDir = false): Path {.tags: [ReadDirEffect].} =
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## Recursively walks over the directory `dir` and yields for each file
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## or directory in `dir`.
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##
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## If ``relative`` is true (default: false) the resulting path is
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## shortened to be relative to ``dir``, otherwise the full path is returned.
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##
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## If `checkDir` is true, `OSError` is raised when `dir`
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## doesn't exist.
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##
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## .. warning:: Modifying the directory structure while the iterator
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## is traversing may result in undefined behavior!
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##
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## Walking is recursive. `followFilter` controls the behaviour of the iterator:
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##
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## ===================== =============================================
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## yieldFilter meaning
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## ===================== =============================================
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## ``pcFile`` yield real files (default)
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## ``pcLinkToFile`` yield symbolic links to files
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## ``pcDir`` yield real directories
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## ``pcLinkToDir`` yield symbolic links to directories
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## ===================== =============================================
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##
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## ===================== =============================================
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## followFilter meaning
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## ===================== =============================================
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## ``pcDir`` follow real directories (default)
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## ``pcLinkToDir`` follow symbolic links to directories
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## ===================== =============================================
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##
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##
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## See also:
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## * `walkPattern iterator`_
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## * `walkFiles iterator`_
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## * `walkDirs iterator`_
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## * `walkDir iterator`_
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for p in walkDirRec(dir.string, yieldFilter, followFilter, relative, checkDir):
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yield Path(p)
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45
lib/std/files.nim
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lib/std/files.nim
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from paths import Path, ReadDirEffect, WriteDirEffect
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from std/private/osfiles import fileExists, removeFile,
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moveFile
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proc fileExists*(filename: Path): bool {.inline, tags: [ReadDirEffect].} =
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## Returns true if `filename` exists and is a regular file or symlink.
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##
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## Directories, device files, named pipes and sockets return false.
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result = fileExists(filename.string)
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proc removeFile*(file: Path) {.inline, tags: [WriteDirEffect].} =
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## Removes the `file`.
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##
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## If this fails, `OSError` is raised. This does not fail
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## if the file never existed in the first place.
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##
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## On Windows, ignores the read-only attribute.
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##
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## See also:
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## * `removeDir proc`_
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## * `copyFile proc`_
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## * `copyFileWithPermissions proc`_
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## * `moveFile proc`_
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removeFile(file.string)
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proc moveFile*(source, dest: Path) {.inline,
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tags: [ReadDirEffect, ReadIOEffect, WriteIOEffect].} =
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## Moves a file from `source` to `dest`.
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##
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## Symlinks are not followed: if `source` is a symlink, it is itself moved,
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## not its target.
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##
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## If this fails, `OSError` is raised.
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## If `dest` already exists, it will be overwritten.
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##
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## Can be used to `rename files`:idx:.
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##
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## See also:
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## * `moveDir proc`_
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## * `copyFile proc`_
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## * `copyFileWithPermissions proc`_
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## * `removeFile proc`_
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moveFile(source.string, dest.string)
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270
lib/std/paths.nim
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lib/std/paths.nim
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import std/private/osseps
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export osseps
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import pathnorm
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from std/private/ospaths2 import joinPath, splitPath,
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ReadDirEffect, WriteDirEffect,
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isAbsolute, relativePath,
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normalizePathEnd, isRelativeTo, parentDir,
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tailDir, isRootDir, parentDirs, `/../`,
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extractFilename, lastPathPart,
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changeFileExt, addFileExt, cmpPaths, splitFile,
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unixToNativePath, absolutePath, normalizeExe,
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normalizePath
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export ReadDirEffect, WriteDirEffect
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type
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Path* = distinct string
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template endsWith(a: string, b: set[char]): bool =
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a.len > 0 and a[^1] in b
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func add(x: var string, tail: string) =
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var state = 0
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let trailingSep = tail.endsWith({DirSep, AltSep}) or tail.len == 0 and x.endsWith({DirSep, AltSep})
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normalizePathEnd(x, trailingSep=false)
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addNormalizePath(tail, x, state, DirSep)
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normalizePathEnd(x, trailingSep=trailingSep)
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func add*(x: var Path, y: Path) {.borrow.}
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func `/`*(head, tail: Path): Path {.inline.} =
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## Joins two directory names to one.
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##
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## returns normalized path concatenation of `head` and `tail`, preserving
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## whether or not `tail` has a trailing slash (or, if tail if empty, whether
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## head has one).
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##
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## See also:
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## * `splitPath proc`_
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## * `uri.combine proc <uri.html#combine,Uri,Uri>`_
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## * `uri./ proc <uri.html#/,Uri,string>`_
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Path(joinPath(head.string, tail.string))
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func splitPath*(path: Path): tuple[head, tail: Path] {.inline.} =
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## Splits a directory into `(head, tail)` tuple, so that
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## ``head / tail == path`` (except for edge cases like "/usr").
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##
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## See also:
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## * `add proc`_
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## * `/ proc`_
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## * `/../ proc`_
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## * `relativePath proc`_
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let res = splitPath(path.string)
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result = (Path(res.head), Path(res.tail))
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func splitFile*(path: Path): tuple[dir, name: Path, ext: string] {.inline.} =
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## Splits a filename into `(dir, name, extension)` tuple.
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##
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## `dir` does not end in DirSep_ unless it's `/`.
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## `extension` includes the leading dot.
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##
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## If `path` has no extension, `ext` is the empty string.
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## If `path` has no directory component, `dir` is the empty string.
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## If `path` has no filename component, `name` and `ext` are empty strings.
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##
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## See also:
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## * `extractFilename proc`_
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## * `lastPathPart proc`_
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## * `changeFileExt proc`_
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## * `addFileExt proc`_
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let res = splitFile(path.string)
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result = (Path(res.dir), Path(res.name), res.ext)
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func isAbsolute*(path: Path): bool {.inline, raises: [].} =
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## Checks whether a given `path` is absolute.
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##
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## On Windows, network paths are considered absolute too.
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result = isAbsolute(path.string)
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proc relativePath*(path, base: Path, sep = DirSep): Path {.inline.} =
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## Converts `path` to a path relative to `base`.
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##
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## The `sep` (default: DirSep_) is used for the path normalizations,
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## this can be useful to ensure the relative path only contains `'/'`
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## so that it can be used for URL constructions.
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##
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## On Windows, if a root of `path` and a root of `base` are different,
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## returns `path` as is because it is impossible to make a relative path.
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## That means an absolute path can be returned.
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##
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## See also:
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## * `splitPath proc`_
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## * `parentDir proc`_
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## * `tailDir proc`_
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result = Path(relativePath(path.string, base.string, sep))
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proc isRelativeTo*(path: Path, base: Path): bool {.inline.} =
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## Returns true if `path` is relative to `base`.
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result = isRelativeTo(path.string, base.string)
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func parentDir*(path: Path): Path {.inline.} =
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## Returns the parent directory of `path`.
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##
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## This is similar to ``splitPath(path).head`` when ``path`` doesn't end
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## in a dir separator, but also takes care of path normalizations.
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## The remainder can be obtained with `lastPathPart(path) proc`_.
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##
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## See also:
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## * `relativePath proc`_
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## * `splitPath proc`_
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## * `tailDir proc`_
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## * `parentDirs iterator`_
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result = Path(parentDir(path.string))
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func tailDir*(path: Path): Path {.inline.} =
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## Returns the tail part of `path`.
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##
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## See also:
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## * `relativePath proc`_
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## * `splitPath proc`_
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## * `parentDir proc`_
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result = Path(tailDir(path.string))
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func isRootDir*(path: Path): bool {.inline.} =
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## Checks whether a given `path` is a root directory.
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result = isRootDir(path.string)
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iterator parentDirs*(path: Path, fromRoot=false, inclusive=true): Path =
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## Walks over all parent directories of a given `path`.
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##
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## If `fromRoot` is true (default: false), the traversal will start from
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## the file system root directory.
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## If `inclusive` is true (default), the original argument will be included
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## in the traversal.
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##
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## Relative paths won't be expanded by this iterator. Instead, it will traverse
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## only the directories appearing in the relative path.
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##
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## See also:
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## * `parentDir proc`_
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##
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for p in parentDirs(path.string, fromRoot, inclusive):
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yield Path(p)
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func `/../`*(head, tail: Path): Path {.inline.} =
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## The same as ``parentDir(head) / tail``, unless there is no parent
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## directory. Then ``head / tail`` is performed instead.
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##
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## See also:
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## * `/ proc`_
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## * `parentDir proc`_
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Path(`/../`(head.string, tail.string))
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func extractFilename*(path: Path): Path {.inline.} =
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## Extracts the filename of a given `path`.
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##
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## This is the same as ``name & ext`` from `splitFile(path) proc`_.
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##
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## See also:
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## * `splitFile proc`_
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## * `lastPathPart proc`_
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## * `changeFileExt proc`_
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## * `addFileExt proc`_
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result = Path(extractFilename(path.string))
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func lastPathPart*(path: Path): Path {.inline.} =
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## Like `extractFilename proc`_, but ignores
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## trailing dir separator; aka: `baseName`:idx: in some other languages.
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##
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## See also:
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## * `splitFile proc`_
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## * `extractFilename proc`_
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## * `changeFileExt proc`_
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## * `addFileExt proc`_
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result = Path(lastPathPart(path.string))
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func changeFileExt*(filename: Path, ext: string): Path {.inline.} =
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## Changes the file extension to `ext`.
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##
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## If the `filename` has no extension, `ext` will be added.
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## If `ext` == "" then any extension is removed.
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##
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## `Ext` should be given without the leading `'.'`, because some
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## filesystems may use a different character. (Although I know
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## of none such beast.)
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##
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## See also:
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## * `splitFile proc`_
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## * `extractFilename proc`_
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## * `lastPathPart proc`_
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## * `addFileExt proc`_
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result = Path(changeFileExt(filename.string, ext))
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func addFileExt*(filename: Path, ext: string): Path {.inline.} =
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## Adds the file extension `ext` to `filename`, unless
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## `filename` already has an extension.
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##
|
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## `Ext` should be given without the leading `'.'`, because some
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## filesystems may use a different character.
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## (Although I know of none such beast.)
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##
|
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## See also:
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## * `splitFile proc`_
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## * `extractFilename proc`_
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## * `lastPathPart proc`_
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## * `changeFileExt proc`_
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result = Path(addFileExt(filename.string, ext))
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func cmpPaths*(pathA, pathB: Path): int {.inline.} =
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## Compares two paths.
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##
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## On a case-sensitive filesystem this is done
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## case-sensitively otherwise case-insensitively. Returns:
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##
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## | 0 if pathA == pathB
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## | < 0 if pathA < pathB
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## | > 0 if pathA > pathB
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result = cmpPaths(pathA.string, pathB.string)
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|
||||
func unixToNativePath*(path: Path, drive=Path("")): Path {.inline.} =
|
||||
## Converts an UNIX-like path to a native one.
|
||||
##
|
||||
## On an UNIX system this does nothing. Else it converts
|
||||
## `'/'`, `'.'`, `'..'` to the appropriate things.
|
||||
##
|
||||
## On systems with a concept of "drives", `drive` is used to determine
|
||||
## which drive label to use during absolute path conversion.
|
||||
## `drive` defaults to the drive of the current working directory, and is
|
||||
## ignored on systems that do not have a concept of "drives".
|
||||
result = Path(unixToNativePath(path.string, drive.string))
|
||||
|
||||
proc getCurrentDir*(): Path {.inline, tags: [].} =
|
||||
## Returns the `current working directory`:idx: i.e. where the built
|
||||
## binary is run.
|
||||
##
|
||||
## So the path returned by this proc is determined at run time.
|
||||
##
|
||||
## See also:
|
||||
## * `getHomeDir proc`_
|
||||
## * `getConfigDir proc`_
|
||||
## * `getTempDir proc`_
|
||||
## * `setCurrentDir proc`_
|
||||
## * `currentSourcePath template <system.html#currentSourcePath.t>`_
|
||||
## * `getProjectPath proc <macros.html#getProjectPath>`_
|
||||
result = Path(ospaths2.getCurrentDir())
|
||||
|
||||
proc setCurrentDir*(newDir: Path) {.inline, tags: [].} =
|
||||
## Sets the `current working directory`:idx:; `OSError`
|
||||
## is raised if `newDir` cannot been set.
|
||||
##
|
||||
## See also:
|
||||
## * `getCurrentDir proc`_
|
||||
ospaths2.setCurrentDir(newDir.string)
|
||||
|
||||
proc normalizeExe*(file: var Path) {.borrow.}
|
||||
|
||||
proc normalizePath*(path: var Path) {.borrow.}
|
||||
|
||||
proc normalizePathEnd*(path: var Path, trailingSep = false) {.borrow.}
|
||||
|
||||
proc absolutePath*(path: Path, root = getCurrentDir()): Path =
|
||||
## Returns the absolute path of `path`, rooted at `root` (which must be absolute;
|
||||
## default: current directory).
|
||||
## If `path` is absolute, return it, ignoring `root`.
|
||||
##
|
||||
## See also:
|
||||
## * `normalizePath proc`_
|
||||
result = Path(absolutePath(path.string, root.string))
|
||||
30
lib/std/symlinks.nim
Normal file
30
lib/std/symlinks.nim
Normal file
|
|
@ -0,0 +1,30 @@
|
|||
from paths import Path, ReadDirEffect
|
||||
|
||||
from std/private/ossymlinks import symlinkExists, createSymlink, expandSymlink
|
||||
|
||||
|
||||
proc symlinkExists*(link: Path): bool {.inline, tags: [ReadDirEffect].} =
|
||||
## Returns true if the symlink `link` exists. Will return true
|
||||
## regardless of whether the link points to a directory or file.
|
||||
result = symlinkExists(link.string)
|
||||
|
||||
proc createSymlink*(src, dest: Path) {.inline.} =
|
||||
## Create a symbolic link at `dest` which points to the item specified
|
||||
## by `src`. On most operating systems, will fail if a link already exists.
|
||||
##
|
||||
## .. warning:: Some OS's (such as Microsoft Windows) restrict the creation
|
||||
## of symlinks to root users (administrators) or users with developer mode enabled.
|
||||
##
|
||||
## See also:
|
||||
## * `createHardlink proc`_
|
||||
## * `expandSymlink proc`_
|
||||
createSymlink(src.string, dest.string)
|
||||
|
||||
proc expandSymlink*(symlinkPath: Path): Path {.inline.} =
|
||||
## Returns a string representing the path to which the symbolic link points.
|
||||
##
|
||||
## On Windows this is a noop, `symlinkPath` is simply returned.
|
||||
##
|
||||
## See also:
|
||||
## * `createSymlink proc`_
|
||||
result = Path(expandSymlink(symlinkPath.string))
|
||||
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Reference in a new issue