p5303: avoid sed GNU-ism

Using "1~5" isn't portable. Nobody seems to have noticed, since perhaps people don't tend to run the perf suite on more exotic platforms. Still, it's better to set a good example. We can use: perl -ne 'print if $. % 5 == 1' instead. But we can further observe that perl does a good job of the other parts of this pipeline, and fold the whole thing together. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Jeff King committed Jan 29, 2021 at 15:04 UTC f08b6c553d5b0e5a50176a176ad9061130fb9b4b
1 file changed +8 -4
t/perf/p5303-many-packs.sh
+8 -4
@@ -21,10 +21,14 @@ repack_into_n () {
21 mkdir staging &&
22
23 git rev-list --first-parent HEAD |
24 - sed -n '1~5p' |
25 - head -n "$1" |
26 - perl -e 'print reverse <>' \
27 - >pushes
24 + perl -e '
25 + my $n = shift;
26 + while (<>) {
27 + last unless @commits < $n;
28 + push @commits, $_ if $. % 5 == 1;
29 + }
30 + print reverse @commits;
31 + ' "$1" >pushes
32
33 # create base packfile
34 head -n 1 pushes |