p.s. If you wanted to do a general thing, for DrRacket, this is what I
was referring to. The README is probably enough of a hint, you don't
need to read the Emacs Lisp. :)

https://github.com/purcell/exec-path-from-shell

On Sat, Feb 16, 2019 at 10:07 PM Greg Hendershott
<greghendersh...@gmail.com> wrote:
>
> From unsophisticated searching the source, it looks like the code to
> implement deps checking is in setup/private/pkg-deps.rkt -- "private"
> meaning you're not supposed to use it directly.
>
> It seems to be called from the `setup-core` function provided by
> (non-private) setup/setup-core.rkt. That seems to be controlled by a
> variety of parameters, including `check-dependencies`. You could
> probably figure out which ones to set, to approximate `raco setup
> <specific-thing>` as opposed to `raco setup` everything.
>
> Or...  system* raco is sounding nicer. But how to find its path.
>
> Are you on macOS?  If so, that's probably why raco isn't on the PATH.
> Every OS has odd things. Windows has it's share. macOS has one, which
> is that GUI apps' PATH doesn't inherit what you see in bash. (That's
> why emacs has exec-path-from-shell.)
>
> I'd suggest (find-system-path 'exec-file), which would be great in
> command-line racket. But in DrR that's something like
> "/Applications/Racket 7.0/DrRacket.app/Contents/MacOS/DrRacket".  Well
> I suppose you could do something like:
>
>    (build-path (find-system-path 'exec-file) 'up 'up 'up 'up "racket"
> "bin" "raco")
>
> On Sat, Feb 16, 2019 at 12:34 AM <jackhfi...@gmail.com> wrote:
> >
> > Using setup/setup works partially, but it doesn't seem to support package 
> > dependency checking (and the #:pkgs keyword argument isn't documented). I 
> > can't seem to find any programmatic alternative to the --check-pkg-deps and 
> > --unused-pkg-deps flags.
> >
> > On Friday, February 15, 2019 at 8:35:17 PM UTC-8, Matthias Felleisen wrote:
> >>
> >> See 
> >> https://docs.racket-lang.org/raco/setup-plt-plt.html?q=setup#%28def._%28%28lib._setup%2Fsetup..rkt%29._setup%29%29
> >>
> >> (require setup/setup)
> >>
> >> I think that’s what you want — Matthias
> >
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