[OE-core] [PATCH 3/7] scripts/oe-build-perf-report: fix handling of --history-length

[Markus Lehtonen]

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 at linux.intel.com>
---
 scripts/oe-build-perf-report | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/oe-build-perf-report b/scripts/oe-build-perf-report
index 3a76ab621d..defd930b04 100755
--- 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)
-- 
2.12.3