[Haskell-cafe] how to expand ~ in a filepath

[Mig Mit]

There is no “should” here. It might be what you want, but it's not a universal standard. In Bash, “~foo” is not expanded.

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> On 2025. Jul 22., at 15:13, Richard O'Keefe <raoknz at gmail.com> wrote:
> 
> But it's not just ~/ that should be expanded.
> All four of "~" "~/bar" "~foo" and "~foo/bar" should be expanded by a
> tilde-expander.
> 
>> On Tue, 22 Jul 2025 at 03:06, Brandon Allbery <allbery.b at gmail.com> wrote:
>> 
>> There's also https://github.com/xmonad/xmonad-contrib/blob/master/XMonad/Prelude.hs#L135-L156 although it also does a few other things.
>> 
>>> On Mon, Jul 21, 2025 at 7:57 AM Tristan Cacqueray via Haskell-Cafe <haskell-cafe at haskell.org> wrote:
>>> 
>>> 
>>> Hello, unfortunately there is no "expandHomePath" or "realpath" helpers
>>> in the standard libraries. Searching for "FilePath -> IO FilePath" in
>>> hoogle shows an implementation in the hledger project:
>>>  https://hackage-content.haskell.org/package/hledger-lib-1.43.2/docs/Hledger-Utils-IO.html#v:expandHomePath
>>> 
>>> … which check if the path begins with "~/", and replace that with the
>>> output of "getHomeDirectory"
>>> 
>>> -Tristan
>>> 
>>> On Mon, Jul 21, 2025 at 07:19 PICCA Frederic-Emmanuel wrote:
>>>> Hello, I am trying to open and read the content of this kind of filepath.
>>>> 
>>>> ~/debian/changelog
>>>> 
>>>> So is there a prefered way to expand the ~ into the real $HOME.
>>>> 
>>>> thanks for your help
>>>> 
>>>> Frédéric
>>>> 
>>>> 
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>> 
>> 
>> 
>> --
>> brandon s allbery kf8nh
>> allbery.b at gmail.com
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