1 files changed, 69 insertions, 0 deletions
diff --git a/classes/sanity.bbclass b/classes/sanity.bbclass
new file mode 100644
index 0000000000..f82af18d74
--- /dev/null
+++ b/classes/sanity.bbclass
@@ -0,0 +1,69 @@
+#
+# Sanity check the users setup for common misconfigurations
+#
+
+BB_MIN_VERSION = "1.3.3"
+
+def raise_sanity_error(msg):
+	import bb
+	bb.fatal("Openembedded's config sanity checker detected a potential misconfiguration.\nEither fix cause of this error or at your own risk disable the checker (see sanity.conf).\n%s" % msg)
+
+def check_conf_exists(fn, data):
+	import bb, os
+
+	bbpath = []
+	fn = bb.data.expand(fn, data)
+	vbbpath = bb.data.getVar("BBPATH", data)
+	if vbbpath:
+		bbpath += vbbpath.split(":")
+	for p in bbpath:
+		currname = os.path.join(bb.data.expand(p, data), fn)
+		if os.access(currname, os.R_OK):
+			return True
+	return False
+
+addhandler check_sanity_eventhandler
+python check_sanity_eventhandler() {
+	from bb import note, error, data, __version__
+	from bb.event import Handled, NotHandled, getName
+	from distutils.version import LooseVersion
+	import os
+
+	sanity_checked = bb.data.getVar('SANITY_CHECKED', e.data)
+	if sanity_checked == "1":
+		return
+
+	# Check the bitbake version meets minimum requirements
+	minversion = bb.data.getVar('BB_MIN_VERSION', e.data , True)
+	if not minversion:
+		# Hack: BB_MIN_VERSION hasn't been parsed yet so return 
+		# and wait for the next call
+		return
+
+	if (LooseVersion(bb.__version__) < LooseVersion(minversion)):
+		raise_sanity_error('Bitbake version %s is required and version %s was found' % (minversion, bb.__version__))
+
+	# Check TARGET_ARCH is set
+	if bb.data.getVar('TARGET_ARCH', e.data, True) == 'INVALID':
+		raise_sanity_error('Please set TARGET_ARCH directly, or choose a MACHINE or DISTRO that does so.')
+	
+	# Check TARGET_OS is set
+	if bb.data.getVar('TARGET_OS', e.data, True) == 'INVALID':
+		raise_sanity_error('Please set TARGET_OS directly, or choose a MACHINE or DISTRO that does so.')
+
+	# Check user doesn't have ASSUME_PROVIDED = instead of += in local.conf
+	if "diffstat-native" not in bb.data.getVar('ASSUME_PROVIDED', e.data, True).split():
+		raise_sanity_error('Please use ASSUME_PROVIDED +=, not ASSUME_PROVIDED = in your local.conf')
+	
+	# Check the MACHINE is valid
+	if not check_conf_exists("conf/machine/${MACHINE}.conf", e.data):
+		raise_sanity_error('Please set a valid MACHINE in your local.conf')
+	
+	# Check the distro is valid
+	if not check_conf_exists("conf/distro/${DISTRO}.conf", e.data):
+		raise_sanity_error('Please set a valid DISTRO in your local.conf')
+	
+	bb.data.setVar('SANITY_CHECKED', "1", e.data)
+	return
+}
+