[PATCH 1/9] isar-bootstrap: Add routin to determine host arch

[Alexander Smirnov <asmirnov@ilbers.de>]

This method will be used to distinguish host and target bootstraps. The
standard python platform module is not robust here, because it provides
the architecture label from kernel. For example running platfotm.machine()
on Fedora kernel will return 'x86_64', what is invalid specificator for
Debian systems.

Signed-off-by: Alexander Smirnov <asmirnov@ilbers.de>
---
 meta/classes/isar-bootstrap-helper.bbclass | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/meta/classes/isar-bootstrap-helper.bbclass b/meta/classes/isar-bootstrap-helper.bbclass
index 3c10fc7..2598ea3 100644
--- a/meta/classes/isar-bootstrap-helper.bbclass
+++ b/meta/classes/isar-bootstrap-helper.bbclass
@@ -14,6 +14,15 @@ def reverse_bb_array(d, varname):
     array = reversed(array.split())
     return " ".join(i for i in array)
 
+python () {
+    import subprocess
+    host_arch = subprocess.Popen("/usr/bin/dpkg --print-architecture",
+                                 shell=True,
+                                 stdout=subprocess.PIPE
+                                ).stdout.read().decode('utf-8').strip()
+    d.setVar("HOST_ARCH", host_arch);
+}
+
 setup_root_file_system() {
     CLEAN=""
     FSTAB=""
-- 
2.1.4