@__DIR__ and @__FILE__ should use upercase drive letter on Windows

[davidanthoff]

Both macros currently seem to return paths that use lowercase drive letters, i.e. something like c:\\bla\\bla. Functions like homedir() and abspath on the other hand return paths with uppercase drive letters. Things then break when one tries to mix paths returned from these macros with paths returned from things like homedir with the relpath function because it is case-sensitive.

I guess another option would be to make relpath on Windows case-insensitive. But it might be easier to just change the two macros?

[StefanKarpinski]

Probably both should be done. When comparing drive letters I think that the drive comparison should be case insensitive since the underlying file system considers c: and C: to be the same thing. However, the @__DIR__ and @__FILE__ macros should return whatever the standard capitalization is, which presumably is uppercase?

[ihnorton]

Related to #9436 (making samefile work correctly on case-insensitive FS)

[davidanthoff]

I just tried to figure out how this could be fixed, but I think the string with that path is constructed somewhere in the non-Julia parts, as far as I can tell. Which means it is above my pay grade :) Having said that, it would be fantastic if this could be fixed, this is constantly tripping up code on Windows that is comparing paths...

[2005m]

Hi,
abspath does not return paths with uppercase drive letters for me.
what about changing the function cd to something like this (not tested):

function cd(dir::AbstractString)
    if Sys.iswindows()
        m = match(r"[a-z]:", dir)
        if typeof(m) != Nothing
            dir = replace(dir, m.match => uppercase(m.match))
        end
    end
    err = ccall(:uv_chdir, Cint, (Cstring,), dir)
    err < 0 && uv_error("cd($(repr(dir)))", err)
    return nothing
end

[inkydragon]

It seems that this issue has been fixed?
Or maybe I didn't find the right way to reproduce it.

Current LTS version on Win 11:

julia> versioninfo()
Julia Version 1.10.6
Commit 67dffc4a8a (2024-10-28 12:23 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 32 × 13th Gen Intel(R) Core(TM) i9-13900HX
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-15.0.7 (ORCJIT, goldmont)
Threads: 1 default, 0 interactive, 1 GC (on 32 virtual cores)

julia> @info "Julia v$(VERSION):" (@__DIR__) (@__FILE__)
┌ Info: Julia v1.10.6:
│   #= REPL[2]:1 =# @__DIR__ = "T:\\jl-testall"
└   #= REPL[2]:1 =# @__FILE__ = "REPL[2]"

Test across versions:

test code

# bugs.jl
@info "Julia v$(VERSION):" (@__DIR__) (@__FILE__)

test script

# test-all-versions.ps1
Set-PSDebug -Trace 1

julia +1.0      bugs.jl
julia +1.6      bugs.jl

julia +1.10.0   bugs.jl
julia +1.10     bugs.jl

julia +1.11.0   bugs.jl
julia +1.11     bugs.jl

julia +nightly  bugs.jl

Output:

PS T:\jl-testall> .\test-all-versions.ps1
DEBUG:    1+  >>>> .\test-all-versions.ps1
DEBUG:    2+  >>>> Set-PSDebug -Trace 1

DEBUG:    4+  >>>> julia +1.0      bugs.jl

┌ Info: Julia v1.0.5:
│   #= T:\jl-testall\bugs.jl:2 =# @__DIR__ = "T:\\jl-testall"
└   #= T:\jl-testall\bugs.jl:2 =# @__FILE__ = "T:\\jl-testall\\bugs.jl"

DEBUG:    5+  >>>> julia +1.6      bugs.jl

┌ Info: Julia v1.6.7:
│   #= T:\jl-testall\bugs.jl:2 =# @__DIR__ = "T:\\jl-testall"
└   #= T:\jl-testall\bugs.jl:2 =# @__FILE__ = "T:\\jl-testall\\bugs.jl"

DEBUG:    7+  >>>> julia +1.10.0   bugs.jl

┌ Info: Julia v1.10.0:
│   #= T:\jl-testall\bugs.jl:2 =# @__DIR__ = "T:\\jl-testall"
└   #= T:\jl-testall\bugs.jl:2 =# @__FILE__ = "T:\\jl-testall\\bugs.jl"

DEBUG:    8+  >>>> julia +1.10     bugs.jl

┌ Info: Julia v1.10.6:
│   #= T:\jl-testall\bugs.jl:2 =# @__DIR__ = "T:\\jl-testall"
└   #= T:\jl-testall\bugs.jl:2 =# @__FILE__ = "T:\\jl-testall\\bugs.jl"

DEBUG:   10+  >>>> julia +1.11.0   bugs.jl

┌ Info: Julia v1.11.0:
│   #= T:\jl-testall\bugs.jl:2 =# @__DIR__ = "T:\\jl-testall"
└   #= T:\jl-testall\bugs.jl:2 =# @__FILE__ = "T:\\jl-testall\\bugs.jl"

DEBUG:   11+  >>>> julia +1.11     bugs.jl

┌ Info: Julia v1.11.1:
│   #= T:\jl-testall\bugs.jl:2 =# @__DIR__ = "T:\\jl-testall"
└   #= T:\jl-testall\bugs.jl:2 =# @__FILE__ = "T:\\jl-testall\\bugs.jl"

DEBUG:   13+  >>>> julia +nightly  bugs.jl

A new `nightly` version is available. Install with `juliaup update`.
┌ Info: Julia v1.12.0-DEV.1542:
│   #= T:\jl-testall\bugs.jl:2 =# @__DIR__ = "T:\\jl-testall"
└   #= T:\jl-testall\bugs.jl:2 =# @__FILE__ = "T:\\jl-testall\\bugs.jl"