bitbake: buildinfohelper: add method to set current build as CANCELLED

This will be used from toasterui to cancel the current command-line
build when a keyboard interrupt is captured.

[YOCTO #8515]

(Bitbake rev: 1486c770327b53bb5e04baa5f3ea26d8154aed63)

Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/ui/buildinfohelper.py

@@ -1251,6 +1251,16 @@ class BuildInfoHelper(object):
 
 
 
+    def cancel_cli_build(self):
+        """
+        If a build is currently underway, set its state to CANCELLED;
+        note that this only gets called for command line builds which are
+        interrupted, so it doesn't touch any BuildRequest objects
+        """
+        build = self.internal_state['build']
+        if build:
+            build.outcome = Build.CANCELLED
+            build.save()
 
     def store_dependency_information(self, event):
         assert '_depgraph' in vars(event)