fix nativeToUnixPath (#18501)

1 files changed, 8 insertions, 3 deletions

diff --git a/lib/std/private/globs.nim b/lib/std/private/globs.nim
index 55f6a40bd..b3726c9c3 100644
--- a/lib/std/private/globs.nim
+++ b/lib/std/private/globs.nim
@@ -45,10 +45,15 @@ iterator walkDirRecFilter*(dir: string, follow: proc(entry: PathEntry): bool = n
 
 proc nativeToUnixPath*(path: string): string =
   # pending https://github.com/nim-lang/Nim/pull/13265
-  doAssert not path.isAbsolute # not implemented here; absolute files need more care for the drive
+  result = path
+  when defined(windows):
+    if path.len >= 2 and path[0] in {'a'..'z', 'A'..'Z'} and path[1] == ':':
+      result[0] = '/'
+      result[1] = path[0]
+      if path.len > 2 and path[2] != '\\':
+        doAssert false, "paths like `C:foo` are currently unsupported, path: " & path
   when DirSep == '\\':
-    result = replace(path, '\\', '/')
-  else: result = path
+    result = replace(result, '\\', '/')
 
 when isMainModule:
   import sugar