Merge ~kzapalowicz/snappy-hwe-snaps/+git/build-scripts:fix/build-for-notexistent-arch into ~snappy-hwe-team/snappy-hwe-snaps/+git/build-scripts:master

[Konrad Zapałowicz]

Workaround building for nonexistent lpia arch by validating the arch fetched from Launchpad against the set of valid architectures.

[Simon Fels (morphis)]

LGTM

review: Approve

[System Enablement Bot (system-enablement-ci-bot)]

PASSED: Continuous integration, rev:12f26cc233829a1da8fc3b279db4adb6f7e85549
https://jenkins.canonical.com/system-enablement/job/generic-build-snap/1080/
Executed test runs:
    SUCCESS: https://jenkins.canonical.com/system-enablement/job/generic-build-snap-worker/81
    SUCCESS: https://jenkins.canonical.com/system-enablement/job/generic-test-snap/791
    None: https://jenkins.canonical.com/system-enablement/job/generic-update-snap-mp/988/console
    SUCCESS: https://jenkins.canonical.com/system-enablement/job/generic-test-snap/790

Click here to trigger a rebuild:
https://jenkins.canonical.com/system-enablement/job/generic-build-snap/1080/rebuild

review: Approve (continuous-integration)

diff --git a/scripts/trigger-lp-build.py b/scripts/trigger-lp-build.py
index 2de16e3..cf7fe3e 100755
--- a/scripts/trigger-lp-build.py
+++ b/scripts/trigger-lp-build.py
@@ -109,11 +109,24 @@ print("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
 stamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
 print("Trying to trigger builds at: {}".format(stamp))
 
+# sometimes we see error such as "u'Unknown architecture lpia for ubuntu xenial'"
+# and in order to workaround let's validate the arches agains set of valid
+# architectures that the snap can choose from
+
+
 # We will now trigger a build for each whitelisted architecture, collect the
 # build job url and the wait for all builds to finish and collect their results
 # to vote for a successful or failed build.
 triggered_builds = []
+valid_arches = ['armhf', 'i386', 'amd64', 'arm64', 's390x', 'powerpc', 'ppc64el']
 for build_arch in arches:
+    # sometimes we see error such as "u'Unknown architecture lpia for
+    # ubuntu xenial'" and in order to workaround let's validate the arches
+    # agains set of valid architectures that the snap can choose from
+    if build_arch not in valid_arches:
+        print("WARNING: Can't build snap for architecture {} as it is not enabled in the build job".format(args["snap"]))
+        continue
+
     arch = release.getDistroArchSeries(archtag=build_arch)
     request = snap.requestBuild(archive=primary_archive, distro_arch_series=arch, pocket='Proposed')
     build_id = str(request).rsplit('/', 1)[-1]