perf/run: learn to send output to codespeed server

Let's make it possible to set in a config file the URL of
a codespeed server. And then let's make the `run` script
send the perf test results to this URL at the end of the
tests.

This should make is possible to easily automate the process
of running perf tests and having their results available in
Codespeed.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/perf/run

@@ -148,10 +148,20 @@ run_subsection () {
 	test "$GIT_PERF_CODESPEED_OUTPUT" = "true" && codespeed_opt="--codespeed"
 
 	run_dirs "$@"
-	./aggregate.perl $codespeed_opt "$@"
+
+	if test -z "$GIT_PERF_SEND_TO_CODESPEED"
+	then
+		./aggregate.perl $codespeed_opt "$@"
+	else
+		json_res_file="test-results/$GIT_PERF_SUBSECTION/aggregate.json"
+		./aggregate.perl --codespeed "$@" | 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
 }
 
 get_var_from_env_or_config "GIT_PERF_CODESPEED_OUTPUT" "perf" "codespeedOutput" "--bool"
+get_var_from_env_or_config "GIT_PERF_SEND_TO_CODESPEED" "perf" "sendToCodespeed"
 
 cd "$(dirname $0)"
 . ../../GIT-BUILD-OPTIONS