TMPDIR doesn't appear to work on Windows

I'm using cmd.exe as the shell (I also tried git bash with not much luck).

E:\>set TMPDIR="E:\ghcup-work"

E:\>echo %TMPDIR%
"E:\ghcup-work"

E:\>ghcup install ghc 9.2.3
[ Info  ] verifying digest of: gs.exe
[ Warn  ] Possibly insufficient disk space on C:\Users\artem\AppData\Local\Temp. At least 5000 MB are recommended, but only 1102.73 are free. Consider freeing up disk space or setting TMPDIR env variable.
[ Warn  ] ...waiting for 10 seconds before continuing anyway, you can still abort...

Why does it mention C:\Users\artem\AppData\Local\Temp when it's supposed to use E:\ghcup-work (the latter does exist if it matters).

This is not how you set env variables in windows.

https://www.tutorialspoint.com/how-to-set-environment-variables-using-powershell#:~:text=To%20set%20the%20environmental%20variable,environment%20variable%20will%20be%20created.

closed

added typesupport label

You're referencing a PowerShell tutorial. I'm not using PowerShell. I'm using the default Windows command-line interpreter called cmd.exe. Its documentation says that set (or setx or setx /m, which I also tried to no avail) is the way to set environment variables.

Does it mean that ghcup is only able to fetch environment variables set in PowerShell? Would it be possible to add this point to the documentation?

I just tried PowerShell and the method described in the tutorial you referenced. With the same exact result as before.

Windows PowerShell
Copyright (C) 2015 Microsoft Corporation. All rights reserved.

PS C:\Users\artem> E:
PS E:\> $env:TMPDIR = 'E:\ghcup-work'
PS E:\> ghcup install ghc 9.4.0.20220623
[ Info  ] downloading: https://raw.githubusercontent.com/haskell/ghcup-metadata/master/ghcup-0.0.7.yaml as file E:\ghcup
\cache\ghcup-0.0.7.yaml
curl: (6) Could not resolve host: raw.githubusercontent.com
[1m[93m[ Warn  ][0m[0m Could not get download info, trying cached version (this may not be recent!)
[1m[93m[ ...   ] [0m[0mIf this problem persists, consider switching downloader via:
[1m[93m[ ...   ] [0m[0m    ghcup config set downloader Wget
[1m[92m[ Info  ][0m[0m downloading: https://raw.githubusercontent.com/haskell/ghcup-metadata/master/ghcup-prerelease
s-0.0.7.yaml as file E:\ghcup\cache\ghcup-prereleases-0.0.7.yaml
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0curl: (6) Could not resolve host: raw.gith
ubusercontent.com
[1m[93m[ Warn  ][0m[0m Could not get download info, trying cached version (this may not be recent!)
[1m[93m[ ...   ] [0m[0mIf this problem persists, consider switching downloader via:
[1m[93m[ ...   ] [0m[0m    ghcup config set downloader Wget
[1m[92m[ Info  ][0m[0m verifying digest of: gs.exe
[1m[93m[ Warn  ][0m[0m Possibly insufficient disk space on C:\Users\artem\AppData\Local\Temp. At least 5000 MB are r
ecommended, but only 1085.87 are free. Consider freeing up disk space or setting TMPDIR env variable.
[1m[93m[ Warn  ][0m[0m ...waiting for 10 seconds before continuing anyway, you can still abort...
PS E:\>

reopened

This issue will be gone in the next release, because we won't use tmpdir anymore. So I'm not sure it's worth investigating. You can build from master branch if you like.

added typebug label and removed typesupport label

What will be the alternative to TMPDIR? I have a (hopefully) simple use case: my C: drive is too small, and I want ghcup to store everything on another drive (E:). Is that supported on master?

On master, it will just use the drive where you installed ghcup into. If ghcup is on E:\ghcup, then tmp is E:\ghcup\tmp

I'm gonna close since I assume it works on master.

closed