git/t/perf/run
Jeff King 28e1fb5466 t/perf: add fallback for pre-bin-wrappers versions of git
It's tempting to say:

  ./run v1.0.0 HEAD

to see how we've sped up Git over the years. Unfortunately,
this doesn't quite work because versions of Git prior to
v1.7.0 lack bin-wrappers, so our "run" script doesn't
correctly put them in the PATH.

Worse, it means we silently find whatever other "git" is in
the PATH, and produce test results that have no bearing on
what we asked for.

Let's fallback to the main git directory when bin-wrappers
isn't present. Many modern perf scripts won't run with such
an antique version of Git, of course, but at least those
failures are detected and reported (and you're free to write
a limited perf script that works across many versions).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-03 10:55:27 -08:00

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#!/bin/sh
case "$1" in
--help)
echo "usage: $0 [other_git_tree...] [--] [test_scripts]"
exit 0
;;
esac
die () {
echo >&2 "error: $*"
exit 1
}
run_one_dir () {
if test $# -eq 0; then
set -- p????-*.sh
fi
echo "=== Running $# tests in ${GIT_TEST_INSTALLED:-this tree} ==="
for t in "$@"; do
./$t $GIT_TEST_OPTS
done
}
unpack_git_rev () {
rev=$1
mkdir -p build/$rev
(cd "$(git rev-parse --show-cdup)" && git archive --format=tar $rev) |
(cd build/$rev && tar x)
}
build_git_rev () {
rev=$1
for config in config.mak config.mak.autogen config.status
do
if test -e "../../$config"
then
cp "../../$config" "build/$rev/"
fi
done
(cd build/$rev && make $GIT_PERF_MAKE_OPTS) ||
die "failed to build revision '$mydir'"
}
run_dirs_helper () {
mydir=${1%/}
shift
while test $# -gt 0 -a "$1" != -- -a ! -f "$1"; do
shift
done
if test $# -gt 0 -a "$1" = --; then
shift
fi
if [ ! -d "$mydir" ]; then
rev=$(git rev-parse --verify "$mydir" 2>/dev/null) ||
die "'$mydir' is neither a directory nor a valid revision"
if [ ! -d build/$rev ]; then
unpack_git_rev $rev
fi
build_git_rev $rev
mydir=build/$rev
fi
if test "$mydir" = .; then
unset GIT_TEST_INSTALLED
else
GIT_TEST_INSTALLED="$mydir/bin-wrappers"
# Older versions of git lacked bin-wrappers; fallback to the
# files in the root.
test -d "$GIT_TEST_INSTALLED" || GIT_TEST_INSTALLED=$mydir
export GIT_TEST_INSTALLED
fi
run_one_dir "$@"
}
run_dirs () {
while test $# -gt 0 -a "$1" != -- -a ! -f "$1"; do
run_dirs_helper "$@"
shift
done
}
GIT_PERF_AGGREGATING_LATER=t
export GIT_PERF_AGGREGATING_LATER
cd "$(dirname $0)"
. ../../GIT-BUILD-OPTIONS
if test $# = 0 -o "$1" = -- -o -f "$1"; then
set -- . "$@"
fi
run_dirs "$@"
./aggregate.perl "$@"