[PATCH v5 2/5] t/perf: use configured PERL_PATH

[Patrick Steinhardt <ps@pks.im>]

Our benchmarks use a couple of Perl scripts to compute results. These
Perl scripts get executed directly, and as the shebang is hardcoded to
"/usr/bin/perl" this will fail on any system where the Perl interpreter
is located in a different path.

Our build infrastructure already lets users configure the location of
Perl, which ultimately gets written into the GIT-BUILD-OPTIONS file.
This file is being sourced by "test-lib.sh", and consequently we already
have the "PERL_PATH" variable available that contains its configured
location.

Use "PERL_PATH" to execute Perl scripts, which makes them work on more
esoteric systems like NixOS. Furthermore, adapt the shebang to use
env(1) to execute Perl so that users who have Perl in PATH, but in a
non-standard location can execute the script directly.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 t/perf/aggregate.perl | 2 +-
 t/perf/perf-lib.sh    | 4 ++--
 t/perf/run            | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/t/perf/aggregate.perl b/t/perf/aggregate.perl
index 575d2000cc1..1791c7528a9 100755
--- a/t/perf/aggregate.perl
+++ b/t/perf/aggregate.perl
@@ -1,4 +1,4 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
 
 use lib '../../perl/build/lib';
 use strict;
diff --git a/t/perf/perf-lib.sh b/t/perf/perf-lib.sh
index 1a9a51ca3cc..4173eee4def 100644
--- a/t/perf/perf-lib.sh
+++ b/t/perf/perf-lib.sh
@@ -276,7 +276,7 @@ test_perf_ () {
 	else
 		test_ok_ "$1"
 	fi
-	"$TEST_DIRECTORY"/perf/min_time.perl test_time.* >"$base".result
+	"$PERL_PATH" "$TEST_DIRECTORY"/perf/min_time.perl test_time.* >"$base".result
 	rm test_time.*
 }
 
@@ -324,7 +324,7 @@ test_at_end_hook_ () {
 	if test -z "$GIT_PERF_AGGREGATING_LATER"; then
 		(
 			cd "$TEST_DIRECTORY"/perf &&
-			./aggregate.perl --results-dir="$TEST_RESULTS_DIR" $(basename "$0")
+			"$PERL_PATH" ./aggregate.perl --results-dir="$TEST_RESULTS_DIR" $(basename "$0")
 		)
 	fi
 }
diff --git a/t/perf/run b/t/perf/run
index 486ead21980..073bcb2afff 100755
--- a/t/perf/run
+++ b/t/perf/run
@@ -192,10 +192,10 @@ run_subsection () {
 
 	if test -z "$GIT_PERF_SEND_TO_CODESPEED"
 	then
-		./aggregate.perl --results-dir="$TEST_RESULTS_DIR" $codespeed_opt "$@"
+		"$PERL_PATH" ./aggregate.perl --results-dir="$TEST_RESULTS_DIR" $codespeed_opt "$@"
 	else
 		json_res_file=""$TEST_RESULTS_DIR"/$GIT_PERF_SUBSECTION/aggregate.json"
-		./aggregate.perl --results-dir="$TEST_RESULTS_DIR" --codespeed "$@" | tee "$json_res_file"
+		"$PERL_PATH" ./aggregate.perl --results-dir="$TEST_RESULTS_DIR" --codespeed "$@" | tee "$json_res_file"
 		send_data_url="$GIT_PERF_SEND_TO_CODESPEED/result/add/json/"
 		curl -v --request POST --data-urlencode "json=$(cat "$json_res_file")" "$send_data_url"
 	fi

-- 
2.49.0.967.g6a0df3ecc3.dirty