From b70a26a7875e0d1106290d583ee34db7159bbf60 Mon Sep 17 00:00:00 2001
From: Christopher Baines <mail@cbaines.net>
Date: Tue, 31 Jul 2018 21:52:42 +0100
Subject: Break match, with some added debugging.

Runinng this gives me:

;;; ("FORK" 273)

;;; ("PID SHOULD BE 0")

;;; ("FORK" 0)

;;; ("PID SHOULD BE 0")

[    3.380838] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000000
---
 gnu/services/version-control.scm | 40 +++++++++++++++++++++-------------------
 1 file changed, 21 insertions(+), 19 deletions(-)

diff --git a/gnu/services/version-control.scm b/gnu/services/version-control.scm
index 2afdf4a29f..1a4adf28c8 100644
--- a/gnu/services/version-control.scm
+++ b/gnu/services/version-control.scm
@@ -303,7 +303,8 @@ access to exported repositories under @file{/srv/git}."
                             #$home "/"
                             (basename
                              (strip-store-file-name admin-pubkey)))))
-         (use-modules (guix build utils))
+         (use-modules (ice-9 match)
+                      (guix build utils))
 
          (simple-format #t "guix: gitolite: installing ~A\n" #$rc-file)
          (copy-file #$rc-file #$(string-append home "/.gitolite.rc"))
@@ -328,24 +329,25 @@ access to exported repositories under @file{/srv/git}."
          ;; admin pubkey if specified. The admin pubkey is required for
          ;; initial setup, and will replace the previous key if run after
          ;; initial setup
-         (let ((pid (primitive-fork)))
-           (if (eq? pid 0)
-               ;; Exit with a non-zero status code if an exception is thrown.
-               (dynamic-wind
-                 (const #t)
-                 (lambda ()
-                   (setenv "HOME" (passwd:dir user-info))
-                   (setenv "USER" #$user)
-                   (setgid (passwd:gid user-info))
-                   (setuid (passwd:uid user-info))
-                   (primitive-exit
-                    (system* #$(file-append package "/bin/gitolite")
-                             "setup"
-                             "-m" "gitolite setup by GNU Guix"
-                             "-pk" pubkey-file)))
-                 (lambda ()
-                   (primitive-exit 1)))
-               (waitpid pid)))
+         (match (peek "FORK" (primitive-fork))
+           (0
+            ;; Exit with a non-zero status code if an exception is thrown.
+            (dynamic-wind
+              (const #t)
+              (lambda ()
+                (setenv "HOME" (passwd:dir user-info))
+                (setenv "USER" #$user)
+                (setgid (passwd:gid user-info))
+                (setuid (passwd:uid user-info))
+                (peek "PID SHOULD BE 0")
+                (primitive-exit
+                 (system* #$(file-append package "/bin/gitolite")
+                          "setup"
+                          "-m" "gitolite setup by GNU Guix"
+                          "-pk" pubkey-file)))
+              (lambda ()
+                (primitive-exit 1))))
+           (pid (waitpid (peek "WAITING FOR PID ->" pid))))
 
          (when (file-exists? pubkey-file)
            (delete-file pubkey-file))))))
-- 
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