Re: Using local package in shell manifest

[Tomas Volf <wolf@wolfsden.cz>]

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On 2023-10-25 16:49:43 -0400, Jesse wrote:
> Hello,
> 
> I have written a package that I have installed with "guix package
> --install-from-file=crosstool-ng.scm". I was able to get it to build and
> install. I can use it if I do "source ~/.guix-profile/etc/profile".
> 
> However, I would like to add it to a shell manifest. My manifest just
> includes
> 
> (specifications->manifest
>   (list "gcc" "git" "zsh" "crosstool-ng"))
> 
> My understanding is that "specifications->manifest" is supposed to search
> for the packages in the list? It returns the following when I rung "guix
> shell" in the directory with the manifest.scm:
> 
> guix shell: loading environment from
> '/home/jesse/Code/guix-tests/manifest.scm'...
> hint: Consider passing the `--check' option once to make sure your shell
> does not
> clobber environment variables.
> 
> guix shell: error: crosstool-ng: unknown package
> guix shell: error: failed to load
> '/home/jesse/Code/guix-tests/manifest.scm':
> gnu/packages.scm:545:4: In procedure specification->package+output:
> Throw to key `quit' with args `(1)'.
> 
> I'd imagine it doesn't know where to look for the package? Is there a way to
> tell guix shell where to look? If not, is there a way to include the package
> in the manifest file? For what it's worth, I have attached the package file
> in question.

I can think of few options:

0. If it would make sense to upstream the package, you should.  That will solve
your problem.

1. Next you could create your own channel, and publish the package there.  After
adding the channel, it should also just work.

2. You could load the package by an absolute path and use it that way, something
like this (untested):

(concatenate-manifests
 (list (specifications->manifest (list "gcc" "git" "zsh"))
       (packages->manifest (list (load "/home/.../crosstool-ng.scm")))))

3. Alternative of the above would be to move the package definition into the
manifest.scm itself, allowing you to drop the load invocation.

Dunno, maybe there are better ways.

> 
> This is also my first foray into Guix and Guile, so I've been kind of
> banging my head through writing a package and the manual but I got a little
> stuck here.
> 
> Thanks

> (use-modules
>  (guix packages)
>  (guix git-download)
>  (guix licenses)
>  (guix profiles)
>  (guix build-system gnu)
>  (guix build-system python)
>  (guix build utils)
>  (gnu packages python)
>  (gnu packages autotools)
>  (gnu packages gettext)
>  (gnu packages texinfo)
>  (gnu packages pkg-config)
>  (gnu packages base)
>  (gnu packages flex)
>  (gnu packages gawk)
>  (gnu packages man)
>  (gnu packages bison)
>  (gnu packages compression)
>  (gnu packages ncurses)
>  )
> 
> (package
>  (name "crosstool-ng")
>  (version "1.26.0")
>  (source (origin
>           (method git-fetch)
>           (uri (git-reference
>                 (url "https://github.com/crosstool-ng/crosstool-ng.git")
>                 (commit (string-append "crosstool-ng-" version))))
>           (sha256
>            (base32
>             "04z7zwhxfbjqrd4j16lviilppsd8phwi8zv2rs4jpkmqni6856j1")
>            )
>           ))
>  (build-system gnu-build-system)
>  (native-inputs
>   (list autoconf
>         automake
>         gettext-minimal
>         libtool
>         texinfo
>         bison
>         flex
>         gawk
>         unzip
>         which
>         help2man
>         python
>         ncurses
>         pkg-config))
>  (arguments
>   '(#:phases (modify-phases %standard-phases
>                             (add-before 'bootstrap 'fix-version-gen
>                                         (lambda* _
>                                                  (patch-shebang "maintainer/git-version-gen")
>                                                  )))))
> 
>  (synopsis "A versatile (cross-)toolchain generator.")
>  (description "A versatile (cross-)toolchain generator.")
>  (home-page "https://crosstool-ng.github.io/docs/")
>  (license gpl2)
>  )

T.

-- 
There are only two hard things in Computer Science:
cache invalidation, naming things and off-by-one errors.

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