[PATCH v2 01/12] isar-bootstrap: Add routine 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 | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/meta/classes/isar-bootstrap-helper.bbclass b/meta/classes/isar-bootstrap-helper.bbclass
index 3c10fc7..9d77ebc 100644
--- a/meta/classes/isar-bootstrap-helper.bbclass
+++ b/meta/classes/isar-bootstrap-helper.bbclass
@@ -7,6 +7,16 @@
 
 IMAGE_TRANSIENT_PACKAGES ??= ""
 
+python() {
+    import subprocess
+    host_arch = subprocess.Popen("dpkg --print-architecture",
+                                 shell=True,
+                                 env=os.environ,
+                                 stdout=subprocess.PIPE
+                                ).stdout.read().decode('utf-8').strip()
+    d.setVar("HOST_ARCH", host_arch);
+}
+
 def reverse_bb_array(d, varname):
     array = d.getVar(varname, True)
     if array is None:
-- 
2.1.4