scripts/oe-build-perf-report: fix handling of --history-length

Don't crash if 'left' revision is older than the range of commits
specified with '--history-length'. In this case the 'left' revision
takes precedence.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

diff --git a/scripts/oe-build-perf-report b/scripts/oe-build-perf-report
index 3a76ab621d755d39d808e802855d191aea69b848..defd930b04cf99f0a8a087ffabf645fd092a73d5 100755 (executable)
--- a/scripts/oe-build-perf-report
+++ b/scripts/oe-build-perf-report
@@ -563,7 +563,7 @@ def main(argv=None):
     xml = is_xml_format(repo, revs[index_r].tags[-1])
 
     if args.html:
-        index_0 = max(0, index_r - args.history_length)
+        index_0 = max(0, min(index_l, index_r - args.history_length))
         rev_range = range(index_0, index_r + 1)
     else:
         # We do not need range of commits for text report (no graphs)