oe-build-perf-test: add pre-run sanity check

The script will be required to be run in an initialized bitbake build
environment.

(From OE-Core rev: 1bce7b10283255a4498d11ead920c1f3b1dec4de)

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/oe-build-perf-test

@@ -16,8 +16,14 @@
 """Build performance test script"""
 import argparse
 import logging
+import os
 import sys
 
+sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)) + '/lib')
+import scriptpath
+scriptpath.add_oe_lib_path()
+from oeqa.utils.commands import runCmd
+
 
 # Set-up logging
 LOG_FORMAT = '[%(asctime)s] %(levelname)s: %(message)s'
@@ -25,6 +31,25 @@ logging.basicConfig(level=logging.INFO, format=LOG_FORMAT)
 log = logging.getLogger()
 
 
+def pre_run_sanity_check():
+    """Sanity check of build environment"""
+    build_dir = os.environ.get("BUILDDIR")
+    if not build_dir:
+        log.error("BUILDDIR not set. Please run the build environmnent setup "
+                  "script.")
+        return False
+    if os.getcwd() != build_dir:
+        log.error("Please run this script under BUILDDIR (%s)", build_dir)
+        return False
+
+    ret = runCmd('which bitbake', ignore_status=True)
+    if ret.status:
+        log.error("bitbake command not found")
+        return False
+
+    return True
+
+
 def parse_args(argv):
     """Parse command line arguments"""
     parser = argparse.ArgumentParser(
@@ -43,6 +68,9 @@ def main(argv=None):
     if args.debug:
         log.setLevel(logging.DEBUG)
 
+    if not pre_run_sanity_check():
+        return 1
+
     return 0