Add GNU mcron, a `cron' implementation in Guile Scheme.

svn path=/nixpkgs/trunk/; revision=14870

pkgs/tools/system/mcron/default.nix

@@ -0,0 +1,30 @@
+{ fetchurl, stdenv, guile, which, ed }:
+
+stdenv.mkDerivation rec {
+  name = "mcron-1.0.4";
+
+  src = fetchurl {
+    url = "mirror://gnu/mcron/${name}.tar.gz";
+    sha256 = "0wrpi9qj50a8wfslapnkmsr6d3qx40hfw57a022m1z1syiljq4xl";
+  };
+
+  patches = [ ./install-vixie-programs.patch ];
+
+  buildInputs = [ guile which ed ];
+
+  meta = {
+    description = "GNU mcron, a flexible implementation of `cron' in Guile";
+
+    longDescription = ''
+      The GNU package mcron (Mellor's cron) is a 100% compatible
+      replacement for Vixie cron.  It is written in pure Guile, and
+      allows configuration files to be written in scheme (as well as
+      Vixie's original format) for infinite flexibility in specifying
+      when jobs should be run.  Mcron was written by Dale Mellor.
+    '';
+
+    homepage = http://www.gnu.org/software/mcron/;
+
+    license = "GPLv3+";
+  };
+}

pkgs/tools/system/mcron/install-vixie-programs.patch

@@ -0,0 +1,22 @@
+This patch allows us to install the Vixie-compatible binaries as
+non-root.
+
+--- mcron-1.0.4/makefile.in	2008-02-21 20:55:24.000000000 +0100
++++ mcron-1.0.4/makefile.in	2009-04-03 20:18:44.000000000 +0200
+@@ -872,15 +872,11 @@ mcron.c : main.scm crontab.scm makefile.
+ 	@rm -f mcron.escaped.scm > /dev/null 2>&1
+ 
+ install-exec-hook:
+-	@if [ "`id -u`" -eq "0" ]; then \
++	@if true; then \
+ 	   rm -f $(fpp)cron$(EXEEXT) > /dev/null 2>&1; \
+ 	   $(INSTALL) --mode='u=rwx' mcron$(EXEEXT) $(fpp)cron$(EXEEXT); \
+ 	   rm -f $(fpp)crontab$(EXEEXT) > /dev/null 2>&1; \
+ 	   $(INSTALL) --mode='u=rwxs,og=rx' mcron$(EXEEXT) $(fpp)crontab$(EXEEXT); \
+-	   ./mkinstalldirs -m 'u=rwx' /var/cron; \
+-	   ./mkinstalldirs -m 'u=rwx,og=rx' /var/run; \
+-	   ./mkinstalldirs -m 'u=rwx,og=rx' @GUILE_SITE@; \
+-	   ./mkinstalldirs -m 'u=rwx,og=rx' @GUILE_SITE@/mcron; \
+     else \
+        echo "+++ WARNING: NON-ROOT INSTALL: ONLY mcron WILL BE INSTALLED, NOT ANY OF THE VIXIE REPLACEMENT PROGRAMS"; \
+ 	fi

pkgs/top-level/all-packages.nix

@@ -936,6 +936,10 @@ let
     inherit (gtkLibs) glib;
   };
 
+  mcron = import ../tools/system/mcron {
+    inherit fetchurl stdenv guile which ed;
+  };
+
   mdbtools = builderDefsPackage (selectVersion ../tools/misc/mdbtools "0.6-pre1") {
     inherit readline pkgconfig bison;
     inherit (gtkLibs) glib;