From 5f8353b3c62e8b42079069951997130ac8e4248b Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Tue, 29 Sep 2015 12:01:03 +0200
Subject: update-package-def: Add -j option to build in parallel

---
 example.rc                       | 12 ++++++++++++
 nix-script-update-package-def.sh | 20 +++++++++++++++++---
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/example.rc b/example.rc
index 272312f..fe1413c 100644
--- a/example.rc
+++ b/example.rc
@@ -42,3 +42,15 @@ RC_SWITCH_DEFAULT_TAG_FLAGS_NIXPKGS=""
 #
 RC_CONTAINER_CONF_TEMPLATE_DIR=~/.nixos-scripts-container-conf-templates/
 
+
+#
+#
+# Command: update-package-def
+#
+#
+
+#
+# default number to pass to "nix-build -j"
+#
+RC_UPD_NIX_BUILD_J=2
+
diff --git a/nix-script-update-package-def.sh b/nix-script-update-package-def.sh
index 45be7c4..fef66a3 100755
--- a/nix-script-update-package-def.sh
+++ b/nix-script-update-package-def.sh
@@ -12,7 +12,7 @@ source $(dirname ${BASH_SOURCE[0]})/nix-utils.sh
 
 usage() {
     cat <<EOS
-    $(help_synopsis "${BASH_SOURCE[0]}" "[-y] [-b] [-c] [-g <nixpkgs path>] -u <url>")
+    $(help_synopsis "${BASH_SOURCE[0]}" "[-y] [-b] [-c] [-g <nixpkgs path>] [-j <n>] -u <url>")
 
         -y          Don't ask before executing things (optional) (not implemented yet)
         -b          Also test-build the package (optional)
@@ -20,6 +20,7 @@ usage() {
         -g <path>   Path of nixpkgs clone (Default: '$RC_NIXPKGS')
         -c          Don't check out another branch for update
         -d          Don't checkout base branch after successfull run.
+        -j <n>      Pass "-j <n>" to nix-build
         -h          Show this help and exit
 
         Helper for developers of Nix packages.
@@ -47,6 +48,10 @@ usage() {
             # Verbosity is on.
             nix-script -v update-package-def -b -u http://monitor.nixos.org/patch?p=ffmpeg-full&v=2.7.1&m=Matthias+Beyer
 
+$(help_rcvars                                                       \
+    "RC_UPD_NIX_BUILD_J - Default number to pass to 'nix-build -j'"
+)
+
 $(help_end "${BASH_SOURCE[0]}")
 EOS
 }
@@ -57,8 +62,9 @@ NIXPKGS=$RC_NIXPKGS
 URL=
 CHECKOUT=1
 DONT_CHECKOUT_BASE=
+J="$RC_UPD_NIX_BUILD_J"
 
-while getopts "ybu:g:cdh" OPTION
+while getopts "ybu:g:cdj:h" OPTION
 do
     case $OPTION in
         y)
@@ -91,6 +97,11 @@ do
             stdout "DONT_CHECKOUT_BASE = $DONT_CHECKOUT_BASE"
             ;;
 
+        j)
+            J="$OPTARG"
+            stderr "J = $J"
+            ;;
+
         h)
             usage
             exit 0
@@ -160,7 +171,10 @@ fi
 
 if [[ $TESTBUILD -eq 1 ]]
 then
-    ask_execute "Build '$PKG' in nixpkgs clone at '$NIXPKGS'" nix-build -A $PKG -I $NIXPKGS
+    __j=""
+    [[ ! -z "$J" ]] && __j="-j $J"
+
+    ask_execute "Build '$PKG' in nixpkgs clone at '$NIXPKGS'" nix-build -A $PKG -I $NIXPKGS $__j
 fi
 
 #
-- 
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