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[bug#45785,2/4] guix: qt-utils: Wrapped executables honor user's envvars.

Message ID ceef8786cf0bf12fcec3fcce066d7f82f4bb746d.1610376081.git.h.goebel@crazy-compilers.com
State New
Headers show
Series [bug#45784,1/4] guix: qt-build-system, qt-utils: Unify wrapping of qt-programs. | expand


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Commit Message

Hartmut Goebel Jan. 11, 2021, 2:41 p.m. UTC
Prior to this change, wrappers did set the specified environment variables to
a fixed value, overwriting any user settings. This inhibited propagating
e.g. XDG_DATA_DIRS from a profile to the application.

Now user environment variables are prefixed (if the variable defines some
"binary" search path, e.g. QT_PLUGIN_PATH) or suffixed (if the variable
defines some config or data search path, e.g. XDG_DATA_DIRS). The code could
also allow to overwrite, anyhow currently no variable is defined like this.

* guix/build/qt-utils.scm (variables-for-wrapping): For each env-var to
  be wrapped, specify whether it should prefix, suffix or overwrite the
  user's variable.
 guix/build/qt-utils.scm | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
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diff --git a/guix/build/qt-utils.scm b/guix/build/qt-utils.scm
index 3fbdb6be61..030059522d 100644
--- a/guix/build/qt-utils.scm
+++ b/guix/build/qt-utils.scm
@@ -39,14 +39,15 @@ 
    (lambda (var-to-wrap) (not (null? (last var-to-wrap))))
     (lambda (var-spec)
-      `(,(first var-spec) = ,(collect-sub-dirs base-directories (last var-spec))))
+      (list (first var-spec) (second var-spec)
+            (collect-sub-dirs base-directories (third var-spec))))
      ;; these shall match the search-path-specification for Qt and KDE
      ;; libraries
-     '("XDG_DATA_DIRS" "/share")
-     '("XDG_CONFIG_DIRS" "/etc/xdg")
-     '("QT_PLUGIN_PATH" "/lib/qt5/plugins")
-     '("QML2_IMPORT_PATH" "/lib/qt5/qml")))))
+     '("XDG_DATA_DIRS" suffix "/share")
+     '("XDG_CONFIG_DIRS" suffix "/etc/xdg")
+     '("QT_PLUGIN_PATH" prefix "/lib/qt5/plugins")
+     '("QML2_IMPORT_PATH" prefix "/lib/qt5/qml")))))
 (define* (wrap-qt-program* program #:key inputs output-dir)