wrap upstart binaries and patch hard-coded paths

pkgs/os-specific/linux/upstart/check-config.nix

@@ -0,0 +1,43 @@
+# Useful tool to check syntax of a config file. Upstart needs a dbus
+# session, so this script wraps one up and makes the operation not
+# require any prior state.
+#
+# See: http://mwhiteley.com/scripts/2012/12/11/dbus-init-checkconf.html
+{stdenv, coreutils, upstart, writeScript, dbus}:
+
+writeScript "upstart-check-config" ''
+  #!${stdenv.shell}
+
+  set -o errexit
+  set -o nounset
+
+  export PATH=${stdenv.lib.makeBinPath [dbus.out upstart coreutils]}:$PATH
+
+  if [[ $# -ne 1 ]]
+  then
+    echo "Usage: $0 upstart-conf-file" >&2
+    exit 1
+  fi
+  config=$1 && shift
+
+  dbus_pid_file=$(mktemp)
+  exec 4<> $dbus_pid_file
+
+  dbus_add_file=$(mktemp)
+  exec 6<> $dbus_add_file
+
+  dbus-daemon --fork --print-pid 4 --print-address 6 --session
+
+  function clean {
+    dbus_pid=$(cat $dbus_pid_file)
+    if [[ -n $dbus_pid ]]; then
+      kill $dbus_pid
+    fi
+    rm -f $dbus_pid_file $dbus_add_file
+  }
+  trap "{ clean; }" EXIT
+
+  export DBUS_SESSION_BUS_ADDRESS=$(cat $dbus_add_file)
+
+  init-checkconf $config
+''

pkgs/os-specific/linux/upstart/default.nix

@@ -1,17 +1,20 @@
-{ stdenv, fetchurl, pkgconfig, dbus, libnih }:
+{ stdenv, fetchurl, pkgconfig, dbus, libnih, python, makeWrapper, utillinux
+, writeScript }:
 
-let version = "1.5"; in
+let
+  inherit (stdenv.lib) makeBinPath;
+  version = "1.5";
 
-stdenv.mkDerivation rec {
+  upstart = stdenv.mkDerivation rec {
   name = "upstart-${version}";
-  
+
   src = fetchurl {
     url = "http://upstart.ubuntu.com/download/${version}/${name}.tar.gz";
     sha256 = "01w4ab6nlisz5blb0an1sxjkndwikr7sjp0cmz4lg00g3n7gahmx";
   };
 
-  buildInputs = [ pkgconfig dbus libnih ];
-  
+  buildInputs = [ pkgconfig dbus libnih python makeWrapper];
+
   NIX_CFLAGS_COMPILE =
     ''
       -DSHELL="${stdenv.shell}"
@@ -33,6 +36,16 @@ stdenv.mkDerivation rec {
       t=$out/etc/bash_completion.d
       mkdir -p $t
       cp ${./upstart-bash-completion} $t/upstart
+
+      # Patch some binaries to refer to the correct binary location.
+      sed -i "s,/sbin/init,$out/bin/init,g" $out/bin/init-checkconf
+      sed -i "s,initctl,$out/bin/initctl," $out/bin/initctl2dot
+
+      # Add some missing executable permissions, and wrap binaries.
+      chmod +x $out/bin/init-checkconf $out/bin/init-checkconf
+      wrapProgram $out/bin/init-checkconf \
+        --prefix PATH : $out/bin:${makeBinPath [utillinux dbus]}
+      wrapProgram $out/bin/initctl2dot --prefix PATH : $out/bin
     '';
 
   meta = {
@@ -40,4 +53,6 @@ stdenv.mkDerivation rec {
     description = "An event-based replacement for the /sbin/init daemon";
     platforms = stdenv.lib.platforms.linux;
   };
-}
+};
+
+in upstart

pkgs/top-level/all-packages.nix

@@ -11852,6 +11852,8 @@ with pkgs;
 
   upstart = callPackage ../os-specific/linux/upstart { };
 
+  upstart-check-config = callPackage ../os-specific/linux/upstart/check-config.nix {};
+
   usbutils = callPackage ../os-specific/linux/usbutils { };
 
   usermount = callPackage ../os-specific/linux/usermount { };