Re: Inkscape export errors

[Ekaitz Zarraga]

Hi,

I think I managed to solve the issues.
All the issues I had were coming from the extensions' dependencies
not being added to Inkscape's.

With the following changes it's supposed to work (it worked in my
machine lol).

I had to package scour too, because it wasn't packaged.

I have a question here btw. In general, python deps are propagated,
and that makes sense. But in programs like inkscape and kicad they
are not propagated. Is this because they create a separate python
interpreter for themselves that has those dependencies separated?
That's why we need to wrap it?

Sorry for the amount of questions but I thought I could understand
it but now everything is blurred in my mind and I'm afraid of myself.
:)

Patch candidate below, please tell me if it makes sense or if it's
anything wrong and I'll update and send to guix-patches.

Thanks!

>From 21a439f6f1978116584a6dc9ac80c0759c3fa771 Mon Sep 17 00:00:00 2001
From: Ekaitz Zarraga <ekaitz@elenq.tech>
Date: Wed, 21 Oct 2020 19:08:20 +0200
Subject: [PATCH] gnu: Correct Inkscape extension dependencies

    * gnu/packages/inkscape.scm (inkscape@1.0.1): Add dependencies.
    * gnu/packages/python-xyz.scm (python-scour): New variable.
---
 gnu/packages/inkscape.scm   | 27 +++++++++++++++++++++++++--
 gnu/packages/python-xyz.scm | 27 +++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/inkscape.scm b/gnu/packages/inkscape.scm
index 4ac3cf3966..b02a8ba8ef 100644
--- a/gnu/packages/inkscape.scm
+++ b/gnu/packages/inkscape.scm
@@ -44,6 +44,7 @@
   #:use-module (gnu packages pdf)
   #:use-module (gnu packages popt)
   #:use-module (gnu packages python)
+  #:use-module (gnu packages python-xyz)
   #:use-module (gnu packages xml)
   #:use-module (gnu packages ghostscript)
   #:use-module (gnu packages fontutils)
@@ -250,7 +251,25 @@ endif()~%~%"
          (add-after 'install 'glib-or-gtk-compile-schemas
            (assoc-ref glib-or-gtk:%standard-phases 
'glib-or-gtk-compile-schemas))
          (add-after 'glib-or-gtk-compile-schemas 'glib-or-gtk-wrap
-           (assoc-ref glib-or-gtk:%standard-phases 'glib-or-gtk-wrap)))))
+           (assoc-ref glib-or-gtk:%standard-phases 'glib-or-gtk-wrap))
+         (add-after 'install 'wrap-program
+           ;; Ensure correct Python at runtime.
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (python (assoc-ref inputs "python"))
+                    (file (string-append out "/bin/inkscape"))
+                    (path (string-append
+                           out
+                           "/lib/python"
+                           ,(version-major+minor
+                             (package-version python))
+                           "/site-packages:"
+                           (getenv "PYTHONPATH"))))
+               (wrap-program file
+                 `("PYTHONPATH" ":" prefix (,path))
+                 `("PATH" ":" prefix
+                   (,(string-append python "/bin:")))))
+             #t)))))
     (inputs
      `(("aspell" ,aspell)
        ("autotrace" ,autotrace)
@@ -283,7 +302,11 @@ endif()~%~%"
        ("googletest" ,googletest)
        ("perl" ,perl)
        ("pkg-config" ,pkg-config)
-       ("python" ,python-wrapper)))
+       ("python" ,python-wrapper)
+       ("python-scour" ,python-scour)
+       ("python-pyserial" ,python-pyserial)
+       ("python-numpy" ,python-numpy)
+       ("python-lxml" ,python-lxml)))
     (home-page "https://inkscape.org/";)
     (synopsis "Vector graphics editor")
     (description "Inkscape is a vector graphics editor.  What sets Inkscape
diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 575ce40ac8..5e8aedc63b 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -22524,3 +22524,30 @@ applications with variable CPU loads).")

 (define-public python2-parallel
   (package-with-python2 python-parallel))
+
+(define-public python-scour
+  (package
+    (name "python-scour")
+    (version "038.1")
+    (source
+      (origin
+        (method git-fetch)
+        (uri
+          (git-reference
+            (url "https://github.com/scour-project/scour.git";)
+            (commit
+              (string-append "v" version))))
+        (sha256
+          (base32 "0rgiypb9ig8x4rl3hfzpy7kwnx1q3064nvlrv4fk0dnp84girn0v"))))
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (build-system python-build-system)
+    (home-page "https://github.com/scour-project/scour";)
+    (synopsis "Scour is an SVG optimizer/cleaner that reduces the size of
+scalable vector graphics by optimizing structure and removing unnecessary data
+written in Python.")
+    (description "The goal of Scour is to output a file that renderes
+identically at a fraction of the size by removing a lot of redundant
+information created by most SVG editors.  Optimization options are typically
+lossless but can be tweaked for more agressive cleaning.")
+    (license license:asl2.0)))
--
2.28.0