Add env var for platform of underlying device

README.rst

@@ -485,6 +485,7 @@ Buildrunner injects special environment variables and volume mounts into every
 run container. The following environment variables are set and available in
 every run container:
 
+:``BUILDRUNNER_PLATFORM``: the platform of the current device (x86_64, aarch64, etc), equivalent to ``platform.machine()``
 :``BUILDRUNNER_BUILD_NUMBER``: the build number
 :``BUILDRUNNER_BUILD_ID``: a unique id identifying the build (includes vcs and build number
                            information), e.g. "main-1791.Ia09cc5.M0-1661374484"

buildrunner/__init__.py

@@ -16,6 +16,7 @@
 import json
 import logging
 import os
+import platform
 import shutil
 import sys
 import tarfile
@@ -89,6 +90,7 @@ def _get_config_context(self, ctx=None, global_env=None):
         """
 
         context = {
+            'BUILDRUNNER_PLATFORM': str(platform.machine()),
             'BUILDRUNNER_BUILD_NUMBER': str(self.build_number),
             'BUILDRUNNER_BUILD_ID': str(self.build_id),
             'BUILDRUNNER_BUILD_DOCKER_TAG': str(sanitize_tag(self.build_id)),

tests/test-files/test-general.yaml

@@ -145,4 +145,10 @@ steps:
   test-uncompressed-dirs:
     run:
       image: {{ DOCKER_REGISTRY }}/centos:8
-      cmd: 'if [ $(ls -laR /artifacts/setup-uncompress-dirs/ | grep tar.gz | wc -l) != 0 ]; then exit 1; fi'
+      cmd: 'if [ $(ls -laR /artifacts/setup-uncompress-dirs/ | grep tar.gz | wc -l) != 0 ]; then exit 1; fi'
+
+  test-platform:
+    run:
+      image: {{ DOCKER_REGISTRY }}/centos:8
+      cmd: 'if [ -z "{{ BUILDRUNNER_PLATFORM }}" ]; then exit 1; else echo "Platform is {{ BUILDRUNNER_PLATFORM }}"; fi'
+