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Add improved Windows UNC path support in std/os (#20281)

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* Add improved Windows UNC path support in std/os

Original issue: `std/os.createDir` tries to create every component of
the given path as a directory. The problem is that `createDir`
interprets every backslash/slash as a path separator. For a UNC path
this is incorrect. E.g. one UNC form is `\\Server\Volume\Path`. It's an
error to create the `\\Server` directory, as well as creating
`\\Server\Volume`.

Add `ntpath.nim` module with `splitDrive` proc. This implements UNC path
parsing as implemented in the Python `ntpath.py` module. The following
UNC forms are supported:

* `\\Server\Volume\Path`
* `\\?\Volume\Path`
* `\\?\UNC\Server\Volume\Path`

Improves support for UNC paths in various procs in `std/os`:
---

* pathnorm.addNormalizePath
  * Issue: This had incomplete support for UNC paths
    * The UNC prefix (first 2 characters of a UNC path) was assumed to
      be exactly `\\`, but it can be `//` and `\/`, etc. as well
    * Also, the UNC prefix must be normalized to the `dirSep` argument
      of `addNormalizePath`
  * Resolution: Changed to account for different UNC prefixes, and
    normalizing the prefixes according to `dirSep`
    * Affected procs that get tests: `relativePath`, `joinPath`
  * Issue: The server/volume part of UNC paths can be stripped when
    normalizing `..` path components
    * This error should be negligable, so ignoring this
* splitPath
  * Now make sure the UNC drive is not split; return the UNC drive as
    `head` if the UNC drive is the only component of the path
  * Consequently fixes `extractFilename`, `lastPathPart`
* parentDir / `/../`
  * Strip away drive before working on the path, prepending the drive
    after all work is done - prevents stripping UNC components
  * Return empty string if drive component is the only component; this
    is the behavior for POSIX paths as well
  * Alternative implementation: Just call something like
    `pathnorm.normalizePath(path & "/..")` for the whole proc - maybe
    too big of a change
* tailDir
  * If drive is present in path, just split that from path and return
    path
* parentDirs iterator
  * Uses `parentDir` for going backwards
  * When going forwards, first `splitDrive`, yield the drive field, and
    then iterate over path field as normal
* splitFile
  * Make sure path parsing stops at end of drive component
* createDir
  * Fixed by skipping drive part before creating directories
  * Alternative implementation: use `parentDirs` iterator instead of
    iterating over characters
    * Consequence is that it will try to create the root directory
* isRootDir
  * Changed to treat UNC drive alone as root (e.g. "//?/c:" is root)
  * This change prevents the empty string being yielded by the
    `parentDirs` iterator with `fromRoot = false`
* Internal `sameRoot`
  * The "root" refers to the drive, so `splitDrive` can be used here

This adds UNC path support to all procs that could use it in std/os. I
don't think any more work has to be done to support UNC paths. For the
future, I believe the path handling code can be refactored due to
duplicate code. There are multiple ways of manipulating paths, such as
manually searching string for path separator and also having a path
normalizer (pathnorm.nim). If all path manipulation used `pathnorm.nim`,
and path component splitting used `parentDirs` iterator, then a lot of
code could be removed.

Tests
---

Added test file for `pathnorm.nim` and `ntpath.nim`.
`pathnorm.normalizePath` has no tests, so I'm adding a few unit tests.
`ntpath.nim` contains tests copied from Python's test suite.

Added integration tests to `tos.nim` that tests UNC paths.

Removed incorrect `relativePath` runnableExamples from being tested on Windows:
---

`relativePath("/Users///me/bar//z.nim", "//Users/", '/') == "me/bar/z.nim"`

This is incorrect on Windows because the `/` and `//` are not the same
root. `/` (or `\`) is expanded to the drive in the current working
directory (e.g. `C:\`). `//` (or `\\`), however, are the first two
characters of a UNC path. The following holds true for normal Windows
installations:

* `dirExists("/Users") != dirExists("//Users")`
* `dirExists("\\Users") != dirExists("\\\\Users")`

Fixes #19103

Questions:
---

* Should the `splitDrive` proc be in `os.nim` instead with copyright
  notice above the proc?
* Is it fine to put most of the new tests into the `runnableExamples`
  section of the procs in std/os?

* [skipci] Apply suggestions from code review

Co-authored-by: Clay Sweetser <Varriount@users.noreply.github.com>

* [skip ci] Update lib/pure/os.nim

Co-authored-by: Clay Sweetser <Varriount@users.noreply.github.com>

* Move runnableExamples tests in os.nim to tos.nim

* tests/topt_no_cursor: Change from using splitFile to splitDrive

`splitFile` can no longer be used in the test, because it generates
different ARC code on Windows and Linux. This replaces `splitFile` with
`splitDrive`, because it generates same ARC code on Windows and Linux,
and returns a tuple. I assume the test wants a proc that returns a
tuple.

* Drop copyright attribute to Python

Co-authored-by: Clay Sweetser <Varriount@users.noreply.github.com>
This commit is contained in:
havardjohn
2022-09-04 02:47:09 +02:00
committed by GitHub
parent a6189fbb98
commit 23e0160af2
7 changed files with 301 additions and 69 deletions
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105
lib/pure/os.nim
View File

@@ -236,6 +236,9 @@ proc `/`*(head, tail: string): string {.noSideEffect, inline.} =
result = joinPath(head, tail)
when doslikeFileSystem:
import std/private/ntpath
proc splitPath*(path: string): tuple[head, tail: string] {.
noSideEffect, rtl, extern: "nos$1".} =
## Splits a directory into `(head, tail)` tuple, so that
@@ -258,8 +261,14 @@ proc splitPath*(path: string): tuple[head, tail: string] {.
assert splitPath("bin") == ("", "bin")
assert splitPath("") == ("", "")
when doslikeFileSystem:
let (drive, splitpath) = splitDrive(path)
let stop = drive.len
else:
const stop = 0
var sepPos = -1
for i in countdown(len(path)-1, 0):
for i in countdown(len(path)-1, stop):
if path[i] in {DirSep, AltSep}:
sepPos = i
break
@@ -272,8 +281,12 @@ proc splitPath*(path: string): tuple[head, tail: string] {.
)
result.tail = substr(path, sepPos+1)
else:
result.head = ""
result.tail = path
when doslikeFileSystem:
result.head = drive
result.tail = splitpath
else:
result.head = ""
result.tail = path
proc isAbsolute*(path: string): bool {.rtl, noSideEffect, extern: "nos$1", raises: [].} =
## Checks whether a given `path` is absolute.
@@ -318,9 +331,6 @@ when doslikeFileSystem:
(path[0] == DirSep and
(path.len == 1 or path[1] notin {DirSep, AltSep, ':'})))
proc isUNCPrefix(path: string): bool {.noSideEffect, raises: [].} =
path[0] == DirSep and path[1] == DirSep
proc sameRoot(path1, path2: string): bool {.noSideEffect, raises: [].} =
## Return true if path1 and path2 have a same root.
##
@@ -330,40 +340,12 @@ when doslikeFileSystem:
assert(isAbsolute(path1))
assert(isAbsolute(path2))
let
len1 = path1.len
len2 = path2.len
assert(len1 != 0 and len2 != 0)
if isAbsFromCurrentDrive(path1) and isAbsFromCurrentDrive(path2):
return true
elif len1 == 1 or len2 == 1:
return false
result = true
elif cmpIgnoreCase(splitDrive(path1).drive, splitDrive(path2).drive) == 0:
result = true
else:
if path1[1] == ':' and path2[1] == ':':
return path1[0].toLowerAscii() == path2[0].toLowerAscii()
else:
var
p1, p2: PathIter
pp1 = next(p1, path1)
pp2 = next(p2, path2)
if pp1[1] - pp1[0] == 1 and pp2[1] - pp2[0] == 1 and
isUNCPrefix(path1) and isUNCPrefix(path2):
#UNC
var h = 0
while p1.hasNext(path1) and p2.hasNext(path2) and h < 2:
pp1 = next(p1, path1)
pp2 = next(p2, path2)
let diff = pp1[1] - pp1[0]
if diff != pp2[1] - pp2[0]:
return false
for i in 0..diff:
if path1[i + pp1[0]] !=? path2[i + pp2[0]]:
return false
inc h
return h == 2
else:
return false
result = false
proc relativePath*(path, base: string, sep = DirSep): string {.
rtl, extern: "nos$1".} =
@@ -384,7 +366,8 @@ proc relativePath*(path, base: string, sep = DirSep): string {.
runnableExamples:
assert relativePath("/Users/me/bar/z.nim", "/Users/other/bad", '/') == "../../me/bar/z.nim"
assert relativePath("/Users/me/bar/z.nim", "/Users/other", '/') == "../me/bar/z.nim"
assert relativePath("/Users///me/bar//z.nim", "//Users/", '/') == "me/bar/z.nim"
when not doslikeFileSystem: # On Windows, UNC-paths start with `//`
assert relativePath("/Users///me/bar//z.nim", "//Users/", '/') == "me/bar/z.nim"
assert relativePath("/Users/me/bar/z.nim", "/Users/me", '/') == "bar/z.nim"
assert relativePath("", "/users/moo", '/') == ""
assert relativePath("foo", ".", '/') == "foo"
@@ -497,6 +480,9 @@ proc parentDir*(path: string): string {.
assert parentDir("a//./") == "."
assert parentDir("a/b/c/..") == "a"
result = pathnorm.normalizePath(path)
when doslikeFileSystem:
let (drive, splitpath) = splitDrive(result)
result = splitpath
var sepPos = parentDirPos(result)
if sepPos >= 0:
result = substr(result, 0, sepPos)
@@ -507,6 +493,13 @@ proc parentDir*(path: string): string {.
result = ""
else:
result = "."
when doslikeFileSystem:
if result.len == 0:
discard
elif drive.len > 0 and result.len == 1 and result[0] in {DirSep, AltSep}:
result = drive
else:
result = drive & result
proc tailDir*(path: string): string {.
noSideEffect, rtl, extern: "nos$1".} =
@@ -526,6 +519,10 @@ proc tailDir*(path: string): string {.
assert tailDir("usr/local/bin") == "local/bin"
var i = 0
when doslikeFileSystem:
let (drive, splitpath) = path.splitDrive
if drive != "":
return splitpath.strip(chars = {DirSep, AltSep}, trailing = false)
while i < len(path):
if path[i] in {DirSep, AltSep}:
while i < len(path) and path[i] in {DirSep, AltSep}: inc i
@@ -544,6 +541,9 @@ proc isRootDir*(path: string): bool {.
assert not isRootDir("/a")
assert not isRootDir("a/b/c")
when doslikeFileSystem:
if splitDrive(path).path == "":
return true
result = parentDirPos(path) < 0
iterator parentDirs*(path: string, fromRoot=false, inclusive=true): string =
@@ -588,7 +588,11 @@ iterator parentDirs*(path: string, fromRoot=false, inclusive=true): string =
current = current.parentDir
yield current
else:
for i in countup(0, path.len - 2): # ignore the last /
when doslikeFileSystem:
let start = path.splitDrive.drive.len
else:
const start = 0
for i in countup(start, path.len - 2): # ignore the last /
# deal with non-normalized paths such as /foo//bar//baz
if path[i] in {DirSep, AltSep} and
(i == 0 or path[i-1] notin {DirSep, AltSep}):
@@ -608,11 +612,15 @@ proc `/../`*(head, tail: string): string {.noSideEffect.} =
assert "a/b/c" /../ "d/e" == "a/b/d/e"
assert "a" /../ "d/e" == "a/d/e"
when doslikeFileSystem:
let (drive, head) = splitDrive(head)
let sepPos = parentDirPos(head)
if sepPos >= 0:
result = substr(head, 0, sepPos-1) / tail
else:
result = head / tail
when doslikeFileSystem:
result = drive / result
proc normExt(ext: string): string =
if ext == "" or ext[0] == ExtSep: result = ext # no copy needed here
@@ -680,7 +688,13 @@ proc splitFile*(path: string): tuple[dir, name, ext: string] {.
var namePos = 0
var dotPos = 0
for i in countdown(len(path) - 1, 0):
when doslikeFileSystem:
let (drive, _) = splitDrive(path)
let stop = len(drive)
result.dir = drive
else:
const stop = 0
for i in countdown(len(path) - 1, stop):
if path[i] in {DirSep, AltSep} or i == 0:
if path[i] in {DirSep, AltSep}:
result.dir = substr(path, 0, if likely(i >= 1): i - 1 else: 0)
@@ -2541,8 +2555,13 @@ proc createDir*(dir: string) {.rtl, extern: "nos$1",
## * `moveDir proc`_
var omitNext = false
when doslikeFileSystem:
omitNext = isAbsolute(dir)
for i in 1.. dir.len-1:
var start = 1
if isAbsolute(dir):
omitNext = true
start = dir.splitDrive.drive.len + 1
else:
let start = 1
for i in start.. dir.len-1:
if dir[i] in {DirSep, AltSep}:
if omitNext:
omitNext = false

17
lib/pure/pathnorm.nim
View File

@@ -29,10 +29,6 @@ proc next*(it: var PathIter; x: string): (int, int) =
if not it.notFirst and x[it.i] in {DirSep, AltSep}:
# absolute path:
inc it.i
when doslikeFileSystem: # UNC paths have leading `\\`
if hasNext(it, x) and x[it.i] == DirSep and
it.i+1 < x.len and x[it.i+1] != DirSep:
inc it.i
else:
while it.i < x.len and x[it.i] notin {DirSep, AltSep}: inc it.i
if it.i > it.prev:
@@ -56,10 +52,23 @@ proc isDotDot(x: string; bounds: (int, int)): bool =
proc isSlash(x: string; bounds: (int, int)): bool =
bounds[1] == bounds[0] and x[bounds[0]] in {DirSep, AltSep}
when doslikeFileSystem:
import std/private/ntpath
proc addNormalizePath*(x: string; result: var string; state: var int;
dirSep = DirSep) =
## Low level proc. Undocumented.
when doslikeFileSystem: # Add Windows drive at start without normalization
var x = x
if result == "":
let (drive, file) = splitDrive(x)
x = file
result.add drive
for c in result.mitems:
if c in {DirSep, AltSep}:
c = dirSep
# state: 0th bit set if isAbsolute path. Other bits count
# the number of path components.
var it: PathIter

61
lib/std/private/ntpath.nim Normal file
View File

@@ -0,0 +1,61 @@
# This module is inspired by Python's `ntpath.py` module.
import std/[
strutils,
]
# Adapted `splitdrive` function from the following commits in Python source
# code:
# 5a607a3ee5e81bdcef3f886f9d20c1376a533df4 (2009): Initial UNC handling (by Mark Hammond)
# 2ba0fd5767577954f331ecbd53596cd8035d7186 (2022): Support for "UNC"-device paths (by Barney Gale)
#
# FAQ: Why use `strip` below? `\\?\UNC` is the start of a "UNC symbolic link",
# which is a special UNC form. Running `strip` differentiates `\\?\UNC\` (a UNC
# symbolic link) from e.g. `\\?\UNCD` (UNCD is the server in the UNC path).
func splitDrive*(p: string): tuple[drive, path: string] =
## Splits a Windows path into a drive and path part. The drive can be e.g.
## `C:`. It can also be a UNC path (`\\server\drive\path`).
##
## The equivalent `splitDrive` for POSIX systems always returns empty drive.
## Therefore this proc is only necessary on DOS-like file systems (together
## with Nim's `doslikeFileSystem` conditional variable).
##
## This proc's use case is to extract `path` such that it can be manipulated
## like a POSIX path.
runnableExamples:
doAssert splitDrive("C:") == ("C:", "")
doAssert splitDrive(r"C:\") == (r"C:", r"\")
doAssert splitDrive(r"\\server\drive\foo\bar") == (r"\\server\drive", r"\foo\bar")
doAssert splitDrive(r"\\?\UNC\server\share\dir") == (r"\\?\UNC\server\share", r"\dir")
result = ("", p)
if p.len < 2:
return
const sep = '\\'
let normp = p.replace('/', sep)
if p.len > 2 and normp[0] == sep and normp[1] == sep and normp[2] != sep:
# is a UNC path:
# vvvvvvvvvvvvvvvvvvvv drive letter or UNC path
# \\machine\mountpoint\directory\etc\...
# directory ^^^^^^^^^^^^^^^
let start = block:
const unc = "\\\\?\\UNC" # Length is 7
let idx = min(8, normp.len)
if unc == normp[0..<idx].strip(chars = {sep}, leading = false).toUpperAscii:
8
else:
2
let index = normp.find(sep, start)
if index == -1:
return
var index2 = normp.find(sep, index + 1)
# a UNC path can't have two slashes in a row (after the initial two)
if index2 == index + 1:
return
if index2 == -1:
index2 = p.len
return (p[0..<index2], p[index2..^1])
if p[1] == ':':
return (p[0..1], p[2..^1])

35
tests/arc/topt_no_cursor.nim
View File

@@ -1,5 +1,5 @@
discard """
output: '''(repo: "", package: "meo", ext: "")
output: '''(package: "", ext: "meo")
doing shady stuff...
3
6
@@ -11,24 +11,17 @@ doing shady stuff...
cmd: '''nim c --gc:arc --expandArc:newTarget --expandArc:delete --expandArc:p1 --expandArc:tt --hint:Performance:off --assertions:off --expandArc:extractConfig --expandArc:mergeShadowScope --expandArc:check $file'''
nimout: '''--expandArc: newTarget
var
splat
:tmp
:tmp_1
:tmp_2
splat = splitFile(path)
:tmp = splat.dir
wasMoved(splat.dir)
:tmp_1 = splat.name
wasMoved(splat.name)
:tmp_2 = splat.ext
wasMoved(splat.ext)
splat = splitDrive do:
let blitTmp = path
blitTmp
:tmp = splat.drive
wasMoved(splat.drive)
:tmp_1 = splat.path_1
wasMoved(splat.path_1)
result = (
let blitTmp = :tmp
blitTmp,
let blitTmp_1 = :tmp_1
let blitTmp_1 = :tmp
blitTmp_1,
let blitTmp_2 = :tmp_2
let blitTmp_2 = :tmp_1
blitTmp_2)
`=destroy`(splat)
-- end of expandArc ------------------------
@@ -160,13 +153,13 @@ else:
-- end of expandArc ------------------------'''
"""
import os
import os, std/private/ntpath
type Target = tuple[repo, package, ext: string]
type Target = tuple[package, ext: string]
proc newTarget*(path: string): Target =
let splat = path.splitFile
result = (repo: splat.dir, package: splat.name, ext: splat.ext)
let splat = path.splitDrive
result = (package: splat.drive, ext: splat.path)
echo newTarget("meo")

48
tests/stdlib/tntpath.nim Normal file
View File

@@ -0,0 +1,48 @@
discard """
"""
import std/private/ntpath
block: # From Python's `Lib/test/test_ntpath.py`
doAssert splitDrive(r"c:\foo\bar") == (r"c:", r"\foo\bar")
doAssert splitDrive(r"c:/foo/bar") == (r"c:", r"/foo/bar")
doAssert splitDrive(r"\\conky\mountpoint\foo\bar") == (r"\\conky\mountpoint", r"\foo\bar")
doAssert splitDrive(r"//conky/mountpoint/foo/bar") == (r"//conky/mountpoint", r"/foo/bar")
doAssert splitDrive(r"\\\conky\mountpoint\foo\bar") == (r"", r"\\\conky\mountpoint\foo\bar")
doAssert splitDrive(r"///conky/mountpoint/foo/bar") == (r"", r"///conky/mountpoint/foo/bar")
doAssert splitDrive(r"\\conky\\mountpoint\foo\bar") == (r"", r"\\conky\\mountpoint\foo\bar")
doAssert splitDrive(r"//conky//mountpoint/foo/bar") == (r"", r"//conky//mountpoint/foo/bar")
# Issue #19911: UNC part containing U+0130
doAssert splitDrive(r"//conky/MOUNTPOİNT/foo/bar") == (r"//conky/MOUNTPOİNT", r"/foo/bar")
# gh-81790: support device namespace, including UNC drives.
doAssert splitDrive(r"//?/c:") == (r"//?/c:", r"")
doAssert splitDrive(r"//?/c:/") == (r"//?/c:", r"/")
doAssert splitDrive(r"//?/c:/dir") == (r"//?/c:", r"/dir")
doAssert splitDrive(r"//?/UNC") == (r"", r"//?/UNC")
doAssert splitDrive(r"//?/UNC/") == (r"", r"//?/UNC/")
doAssert splitDrive(r"//?/UNC/server/") == (r"//?/UNC/server/", r"")
doAssert splitDrive(r"//?/UNC/server/share") == (r"//?/UNC/server/share", r"")
doAssert splitDrive(r"//?/UNC/server/share/dir") == (r"//?/UNC/server/share", r"/dir")
doAssert splitDrive(r"//?/VOLUME{00000000-0000-0000-0000-000000000000}/spam") == (r"//?/VOLUME{00000000-0000-0000-0000-000000000000}", r"/spam")
doAssert splitDrive(r"//?/BootPartition/") == (r"//?/BootPartition", r"/")
doAssert splitDrive(r"\\?\c:") == (r"\\?\c:", r"")
doAssert splitDrive(r"\\?\c:\") == (r"\\?\c:", r"\")
doAssert splitDrive(r"\\?\c:\dir") == (r"\\?\c:", r"\dir")
doAssert splitDrive(r"\\?\UNC") == (r"", r"\\?\UNC")
doAssert splitDrive(r"\\?\UNC\") == (r"", r"\\?\UNC\")
doAssert splitDrive(r"\\?\UNC\server\") == (r"\\?\UNC\server\", r"")
doAssert splitDrive(r"\\?\UNC\server\share") == (r"\\?\UNC\server\share", r"")
doAssert splitDrive(r"\\?\UNC\server\share\dir") == (r"\\?\UNC\server\share", r"\dir")
doAssert splitDrive(r"\\?\VOLUME{00000000-0000-0000-0000-000000000000}\spam") == (r"\\?\VOLUME{00000000-0000-0000-0000-000000000000}", r"\spam")
doAssert splitDrive(r"\\?\BootPartition\") == (r"\\?\BootPartition", r"\")
block:
doAssert splitDrive(r"C:") == (r"C:", r"")
doAssert splitDrive(r"C:\") == (r"C:", r"\")
doAssert splitDrive(r"non/absolute/path") == (r"", r"non/absolute/path")
# Special for `\`-rooted paths on Windows. I don't know if this is correct,
# rbut `\` is not recognized as a drive, in contrast to `C:` or `\?\c:`.
# This behavior is the same for Python's `splitdrive` function.
doAssert splitDrive(r"\\") == (r"", r"\\")

70
tests/stdlib/tos.nim
View File

@@ -508,7 +508,11 @@ block ospaths:
doAssert relativePath("/Users/me/bar/z.nim", "/Users/other/bad", '/') == "../../me/bar/z.nim"
doAssert relativePath("/Users/me/bar/z.nim", "/Users/other", '/') == "../me/bar/z.nim"
doAssert relativePath("/Users///me/bar//z.nim", "//Users/", '/') == "me/bar/z.nim"
# `//` is a UNC path, `/` is the current working directory's drive, so can't
# run this test on Windows.
when not doslikeFileSystem:
doAssert relativePath("/Users///me/bar//z.nim", "//Users/", '/') == "me/bar/z.nim"
doAssert relativePath("/Users/me/bar/z.nim", "/Users/me", '/') == "bar/z.nim"
doAssert relativePath("", "/users/moo", '/') == ""
doAssert relativePath("foo", "", '/') == "foo"
@@ -707,3 +711,67 @@ block: # isAdmin
if isAzure and defined(windows): doAssert isAdmin()
# In Azure on POSIX tests run as a normal user
if isAzure and defined(posix): doAssert not isAdmin()
when doslikeFileSystem:
import std/[sequtils, private/ntpath]
block: # Bug #19103 UNC paths
# Easiest way of generating a valid, readable and writable UNC path
let tempDir = r"\\?\" & getTempDir()
doAssert dirExists tempDir
createDir tempDir / "test"
removeDir tempDir / "test"
createDir tempDir / "recursive" / "test"
removeDir tempDir / "recursive" / "test"
let tempDir2 = getTempDir()
let (drive, pathNoDrive) = splitDrive(tempDir2)
setCurrentDir drive
doAssert cmpIgnoreCase(getCurrentDir().splitDrive.drive, drive) == 0
# Test `\Users` path syntax on Windows by stripping away drive. `\`
# resolves to the drive in current working directory. This drive will be
# the same as `tempDir2` because of the `setCurrentDir` above.
doAssert pathNoDrive[0] == '\\'
createDir pathNoDrive / "test"
doAssert dirExists pathNoDrive / "test"
removeDir pathNoDrive / "test"
doAssert splitPath("//?/c:") == ("//?/c:", "")
doAssert relativePath("//?/c:///Users//me", "//?/c:", '/') == "Users/me"
doAssert parentDir(r"\\?\c:") == r""
doAssert parentDir(r"//?/c:/Users") == r"\\?\c:"
doAssert parentDir(r"\\localhost\c$") == r""
doAssert parentDir(r"\Users") == r"\"
doAssert tailDir("//?/c:") == ""
doAssert tailDir("//?/c:/Users") == "Users"
doAssert tailDir(r"\\localhost\c$\Windows\System32") == r"Windows\System32"
doAssert isRootDir("//?/c:")
doAssert isRootDir("//?/UNC/localhost/c$")
doAssert not isRootDir(r"\\?\c:\Users")
doAssert parentDirs(r"C:\Users", fromRoot = true).toSeq == @[r"C:\", r"C:\Users"]
doAssert parentDirs(r"C:\Users", fromRoot = false).toSeq == @[r"C:\Users", r"C:"]
doAssert parentDirs(r"\\?\c:\Users", fromRoot = true).toSeq ==
@[r"\\?\c:\", r"\\?\c:\Users"]
doAssert parentDirs(r"\\?\c:\Users", fromRoot = false).toSeq ==
@[r"\\?\c:\Users", r"\\?\c:"]
doAssert parentDirs(r"//localhost/c$/Users", fromRoot = true).toSeq ==
@[r"//localhost/c$/", r"//localhost/c$/Users"]
doAssert parentDirs(r"//?/UNC/localhost/c$/Users", fromRoot = false).toSeq ==
@[r"//?/UNC/localhost/c$/Users", r"\\?\UNC\localhost\c$"]
doAssert parentDirs(r"\Users", fromRoot = true).toSeq == @[r"\", r"\Users"]
doAssert parentDirs(r"\Users", fromRoot = false).toSeq == @[r"\Users", r"\"]
doAssert r"//?/c:" /../ "d/e" == r"\\?\c:\d\e"
doAssert r"//?/c:/Users" /../ "d/e" == r"\\?\c:\d\e"
doAssert r"\\localhost\c$" /../ "d/e" == r"\\localhost\c$\d\e"
doAssert splitFile("//?/c:") == ("//?/c:", "", "")
doAssert splitFile("//?/c:/Users") == ("//?/c:", "Users", "")
doAssert splitFile(r"\\localhost\c$\test.txt") == (r"\\localhost\c$", "test", ".txt")

34
tests/stdlib/tpathnorm.nim Normal file
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@@ -0,0 +1,34 @@
discard """
"""
import std/os
when doslikeFileSystem:
import std/pathnorm
template initVars =
var state {.inject.} = 0
var result {.inject.}: string
block: # / -> /
initVars
addNormalizePath("//?/c:/./foo//bar/../baz", result, state, '/')
doAssert result == "//?/c:/foo/baz"
addNormalizePath("me", result, state, '/')
doAssert result == "//?/c:/foo/baz/me"
block: # / -> \
initVars
addNormalizePath(r"//?/c:/./foo//bar/../baz", result, state, '\\')
doAssert result == r"\\?\c:\foo\baz"
addNormalizePath("me", result, state, '\\')
doAssert result == r"\\?\c:\foo\baz\me"
block: # Append path component to UNC drive
initVars
addNormalizePath(r"//?/c:", result, state, '\\')
doAssert result == r"\\?\c:"
addNormalizePath("Users", result, state, '\\')
doAssert result == r"\\?\c:\Users"
addNormalizePath("me", result, state, '\\')
doAssert result == r"\\?\c:\Users\me"