Re: Obtaining the path of the application program?

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Usually, if you want to refer to data files etc relative to the current
module's file, a good solution is to use `define-runtime-path`. It uses
`#%variable-reference` as the basis for its implementation, but adds other
features like cooperation with `raco exe` (see docs for
`define-runtime-path` near "an executable creator").

Ryan


On Thu, Aug 26, 2021 at 4:51 PM Jeff Henrikson <[email protected]> wrote:

> Racket users,
>
> Many software applications use their location in the filesystem to
> establish filesystem relationships between their executable file, their
> configuration and their data.  For this purpose, C provides the first
> element of the string array provided to main, python provides __file__,
> bash provides ${BASH_SOURCE[0]}, etc.
>
> Racket strips said value before current-command-line-arguments receives
> the subsequent command-line arguments from the operating system.
>
> A related value can be pulled from syntax-source as follows:
>
> (define-syntax (get-current-source stx)
>   (datum->syntax
>    (quote-syntax here)
>    (syntax-source stx)
>    stx))
>
> Macro get-current-source works as intended if called at program startup
> and the program is compiled on the fly with:
>
> racket program.rkt
>
> However get-current-source has the unintended property of memorizing the
> original source location if the program is compiled with raco exe (and then
> moved).
> Is there a way in racket to obtain the path of the application program?
>
>
> Jeff Henrikson
>
>
> --
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> .
>

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<div dir=3D"ltr"><div>Usually, if you want to refer to data files etc relat=
ive to the current module&#39;s file, a good solution is to use `define-run=
time-path`. It uses `#%variable-reference` as the basis for its implementat=
ion, but adds other features like cooperation with `raco exe` (see docs for=
 `define-runtime-path` near &quot;an executable creator&quot;).</div><div><=
br></div><div>Ryan</div><div><br></div></div><br><div class=3D"gmail_quote"=
><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Aug 26, 2021 at 4:51 PM Jeff=
 Henrikson &lt;<a href=3D"mailto:[email protected]">[email protected]=
</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:=
0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
 =20

   =20
 =20
  <div>
    <div lang=3D"x-unicode">
      <p>Racket users,<br>
        <br>
        Many software applications use their location in the filesystem
        to establish filesystem relationships between their executable
        file, their configuration and their data.=C2=A0 For this purpose, C
        provides the first element of the string array provided to main,
        python provides __file__, bash provides ${BASH_SOURCE[0]}, etc.<br>
        <br>
        Racket strips said value before current-command-line-arguments
        receives the subsequent command-line arguments from the
        operating system.<br>
        <br>
        A related value can be pulled from syntax-source as follows:<br>
      </p>
      <blockquote>(define-syntax (get-current-source stx)<br>
        =C2=A0 (datum-&gt;syntax<br>
        =C2=A0=C2=A0 (quote-syntax here)<br>
        =C2=A0=C2=A0 (syntax-source stx)<br>
        =C2=A0=C2=A0 stx))<br>
      </blockquote>
      <p>Macro get-current-source works as intended if called at program
        startup and the program is compiled on the fly with:<br>
      </p>
      <blockquote>racket program.rkt<br>
      </blockquote>
      <p>However get-current-source has the unintended property of
        memorizing the original source location if the program is
        compiled with raco exe (and then moved).</p>
      Is there a way in racket to obtain the path of the application
      program?
      <p><br>
      </p>
      <p>Jeff Henrikson</p>
      <p><br>
      </p>
    </div>
  </div>


<p></p>

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</blockquote></div>

<p></p>

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