[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7777/8267] scripts/oe-build-perf-report: fix handling of --history-length

[Emmanuele Bassi <ebassi src gnome org>]

commit a7461ad2a2f06e9cdeead9621ab3c7048ce14227
Author: Markus Lehtonen <markus lehtonen linux intel com>
Date:   Fri Sep 15 15:54:51 2017 +0300

    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.
    
    (From OE-Core rev: cbeb1fb27329f8eba4d779d22fcad56f0fb03947)
    
    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-report |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/scripts/oe-build-perf-report b/scripts/oe-build-perf-report
index 3a76ab6..defd930 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)