[PATCH v3 5/6] perf tests: add "bindir" prefix to git tree test results

[Ævar Arnfjörð Bjarmason]

Change the output file names in test-results/ to be
"test-results/bindir_<munged dir>" rather than just
"test-results/<munged dir>".

This is for consistency with the "build_" directories we have for
built revisions, i.e. "test-results/build_<SHA-1>".

There's no user-visible functional changes here, it just makes it
easier to see at a glance what "test-results" files are of what "type"
as they're all explicitly grouped together now, and to grep this code
to find both the run_dirs_helper() implementation and its
corresponding aggregate.perl code.

Note that we already guarantee that the rest of the
PERF_RESULTS_PREFIX is an absolute path, and since it'll start with
e.g. "/" which we munge to "_" we'll up with a readable string like
"bindir_home_avar[...]".

Signed-off-by: Ævar Arnfjörð Bjarmason <ava...@gmail.com>
---
 t/perf/aggregate.perl | 4 +++-
 t/perf/run            | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/t/perf/aggregate.perl b/t/perf/aggregate.perl
index c8f4a78903..b951747e08 100755
--- a/t/perf/aggregate.perl
+++ b/t/perf/aggregate.perl
@@ -100,6 +100,7 @@ sub format_size {
 while (scalar @ARGV) {
        my $arg = $ARGV[0];
        my $dir;
+       my $prefix = '';
        last if -f $arg or $arg eq "--";
        if (! -d $arg) {
                my $rev = Git::command_oneline(qw(rev-parse --verify), $arg);
@@ -109,10 +110,11 @@ sub format_size {
        } else {
                $dir = realpath($arg);
                $dirnames{$dir} = $dir;
+               $prefix .= 'bindir';
        }
        push @dirs, $dir;
        $dirnames{$dir} ||= $arg;
-       my $prefix = $dir;
+       $prefix .= $dir;
        $prefix =~ tr/^a-zA-Z0-9/_/c;
        $prefixes{$dir} = $prefix . '.';
        shift @ARGV;
diff --git a/t/perf/run b/t/perf/run
index 85b7bd31d5..cd3882b117 100755
--- a/t/perf/run
+++ b/t/perf/run
@@ -102,7 +102,7 @@ run_dirs_helper () {
                unset GIT_TEST_INSTALLED
        elif test -d "$mydir"
        then
-               PERF_RESULTS_PREFIX=$(cd $mydir && printf "%s" "$(pwd)" | tr -c 
"[a-zA-Z0-9]" "_").
+               PERF_RESULTS_PREFIX=bindir$(cd $mydir && printf "%s" "$(pwd)" | 
tr -c "[a-zA-Z0-9]" "_").
                set_git_test_installed "$mydir"
        else
                rev=$(git rev-parse --verify "$mydir" 2>/dev/null) ||
-- 
2.21.0.593.g511ec345e18