How to import modules into build phase

How to import modules into build phase

[David Craven]

Hi,

So I'm getting a lot of weird errors and tried a bunch of different things.

I have a wrap-qt-program in (gnu packages qt) and would like to make
it available on the build side.

The snippet I'm trying to use doesn't work:

       #:modules ((gnu packages qt)
                  ,@%cmake-build-system-modules)

For reference wrap-qt-program looks like this:

(define (wrap-qt-program out program)
  (define (suffix env-var path)
    (let ((env-val (getenv env-var)))
      (if env-val (string-append env-val ":" path) path)))

  (let ((qml-path        (suffix "QML2_IMPORT_PATH"
                                 (string-append out "/qml")))
        (plugin-path     (suffix "QT_PLUGIN_PATH"
                                 (string-append out "/plugins")))
        (xdg-data-path   (suffix "XDG_DATA_DIRS"
                                 (string-append out "/share")))
        (xdg-config-path (suffix "XDG_CONFIG_DIRS"
                                 (string-append out "/etc/xdg"))))
  (wrap-program (string-append out "/bin/" program)
    `("QML2_IMPORT_PATH" = (,qml-path))
    `("QT_PLUGIN_PATH" = (,plugin-path))
    `("XDG_DATA_DIRS" = (,xdg-data-path))
    `("XDG_CONFIG_DIRS" = (,xdg-config-path)))))

Re: How to import modules into build phase

[David Craven]

Found a solution. Requires both #:modules and #:imported-modules to be
set to work.

Re: How to import modules into build phase

[Ludovic Courtès]

Hi,

David Craven <david@craven.ch> skribis:

> The snippet I'm trying to use doesn't work:
>
>        #:modules ((gnu packages qt)
>                   ,@%cmake-build-system-modules)

For reference, this doesn’t work because (gnu packages qt) depends on
all the (guix …) modules.  They would need to be added to
#:imported-modules, but then that remains inconvenient because that’s a
lot of modules for just the one procedure that you want.

For this reason, modules that are obviously build-side-only are in (guix
build …).

Ludo’.