[gnome-build-meta/tristan/fix-max-job-usage: 1/2] core-deps/argyll.bst: Fix max-jobs usage to avoid random cache key

[Tristan Van Berkom <tvb src gnome org>]

commit e40633f3f0ddd3ec35502ecc8618f8915e9f7451
Author: Tristan Van Berkom <tristan vanberkom codethink co uk>
Date:   Mon Sep 10 19:55:44 2018 +0900

    core-deps/argyll.bst: Fix max-jobs usage to avoid random cache key
    
    The `max-jobs` variable is an automatic variable which should
    not be fed to builds directly in the build commands, this will
    cause random rebuilds to occur depending on how many jobs BuildStream
    has decided to use, based on the host.
    
    Fixed this by using the `environment-nocache` feature which was
    designed specifically for this.

 elements/core-deps/argyll.bst | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/elements/core-deps/argyll.bst b/elements/core-deps/argyll.bst
index 26a2730..75ee415 100644
--- a/elements/core-deps/argyll.bst
+++ b/elements/core-deps/argyll.bst
@@ -23,6 +23,10 @@ depends:
   junction: freedesktop-sdk.bst
 config:
   build-commands:
-  - jam -q -fJambase -j%{max-jobs}
+  - jam -q -fJambase -j${JOBS}
   install-commands:
-  - jam -q -fJambase -j%{max-jobs} DESTDIR=%{install-root} PREFIX=%{prefix} install
+  - jam -q -fJambase -j${JOBS} DESTDIR=%{install-root} PREFIX=%{prefix} install
+environment:
+  JOBS: '%{max-jobs}'
+environment-nocache:
+- JOBS