etc: Add explicit ‘--substitute-urls’ in guix-daemon service files.

Having substitute URLs explicitly listed in the service startup file
makes it clearer what should be modified to permanently change the list
of substitute URLs.

* config-daemon.ac: Rename ‘guix_substitute_urls’ to
‘GUIX_SUBSTITUTE_URLS’ and substitute it.
* nix/local.mk (etc/guix-%.service, etc/init.d/guix-daemon)
(etc/guix-%.conf): Substitute it.
* etc/guix-daemon.conf.in, etc/guix-daemon.service.in,
etc/init.d/guix-daemon.in: Add an explicit ‘--substitute-urls’ option.

Change-Id: Ie491b7fab5c42e54dca582801c03805a85de2bf9

1 files changed, 4 insertions, 3 deletions

diff --git a/config-daemon.ac b/config-daemon.ac
index 9188f93bda8..9854f1d694f 100644
--- a/config-daemon.ac
+++ b/config-daemon.ac
@@ -106,12 +106,13 @@ if test "x$guix_build_daemon" = "xyes"; then
 
   dnl Determine the appropriate default list of substitute URLs (GnuTLS
   dnl is required so we can default to 'https'.)
-  guix_substitute_urls="https://bordeaux.guix.gnu.org https://ci.guix.gnu.org"
+  GUIX_SUBSTITUTE_URLS="https://bordeaux.guix.gnu.org https://ci.guix.gnu.org"
 
   AC_MSG_CHECKING([for default substitute URLs])
-  AC_MSG_RESULT([$guix_substitute_urls])
+  AC_MSG_RESULT([$GUIX_SUBSTITUTE_URLS])
+  AC_SUBST([GUIX_SUBSTITUTE_URLS])
 
-  AC_DEFINE_UNQUOTED([GUIX_SUBSTITUTE_URLS], ["$guix_substitute_urls"],
+  AC_DEFINE_UNQUOTED([GUIX_SUBSTITUTE_URLS], ["$GUIX_SUBSTITUTE_URLS"],
     [Default list of substitute URLs used by 'guix-daemon'.])
 
   dnl Check for Guile-SSH, which is required by 'guix offload'.