[bug#66525] [PATCH 3/7] gnu: python-dbusmock: Remove dependency on (guix build syscalls).

["Ludovic Courtès" <ludo@gnu.org>]

Having a dependency on (guix build syscalls) this deep in the stack
would make it much harder to change syscalls.scm.

* gnu/packages/python-xyz.scm (python-dbusmock)[native-inputs]: Remove TINY.
[arguments]: Remove #:imported-modules, and remove (guix build syscalls)
from #:modules.  Rewrite ‘check’ phase to reap processes from the build
process itself.
---
 gnu/packages/python-xyz.scm | 32 +++++++++++++++-----------------
 1 file changed, 15 insertions(+), 17 deletions(-)

diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 07984adb8e..e871951def 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -27156,12 +27156,10 @@ (define-public python-dbusmock
          "1nwl0gzzds2g1w1gfxfzlgrkb5hr1rrdyn619ml25c6b1rjyfk3g"))))
     (build-system python-build-system)
     (arguments
-     `(#:imported-modules (,@%python-build-system-modules
-                           (guix build syscalls))
-       #:modules ((guix build python-build-system)
-                  (guix build syscalls)
+     `(#:modules ((guix build python-build-system)
                   (guix build utils)
                   (ice-9 match))
+
        #:phases
        (modify-phases %standard-phases
          (add-after 'unpack 'patch-paths
@@ -27177,20 +27175,20 @@ (define-public python-dbusmock
              (when tests?
                (match (primitive-fork)
                  (0                     ;child process
-                  (set-child-subreaper!)
-                  ;; Use tini so that signals are properly handled and
-                  ;; doubly-forked processes get reaped; otherwise,
-                  ;; python-dbusmock would waste time polling for the dbus
-                  ;; processes it spawns to be reaped, in vain.
-                  (execlp "tini" "--" "pytest" "-vv"))
-                 (pid
-                  (match (waitpid pid)
-                    ((_ . status)
-                     (unless (zero? status)
-                       (error "`pytest' exited with status"
-                              status))))))))))))
+                  (execlp "pytest" "pytest" "-vv"))
+                 (pytest-pid
+                  (let loop ()
+                    ;; Reap child processes; otherwise, python-dbusmock would
+                    ;; waste time polling for the dbus processes it spawns to
+                    ;; be reaped, in vain.
+                    (match (waitpid WAIT_ANY)
+                      ((pid . status)
+                       (if (= pid pytest-pid)
+                           (unless (zero? status)
+                             (error "`pytest' exited with status" status))
+                           (loop)))))))))))))
     (native-inputs
-     (list dbus python-pytest tini which))
+     (list dbus python-pytest which))
     (inputs
      (list dbus))
     (propagated-inputs
-- 
2.41.0