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#!/bin/sh

die () {
	echo >&2 "error: $*"
	exit 1
}

while [ $# -gt 0 ]; do
	arg="$1"
	case "$arg" in
	--)
		break ;;
	--help)
		echo "usage: $0 [--config file] [--subsection subsec] [other_git_tree...] [--] [test_scripts]"
		exit 0 ;;
	--config)
		shift
		GIT_PERF_CONFIG_FILE=$(cd "$(dirname "$1")"; pwd)/$(basename "$1")
		export GIT_PERF_CONFIG_FILE
		shift ;;
	--subsection)
		shift
		GIT_PERF_SUBSECTION="$1"
		export GIT_PERF_SUBSECTION
		shift ;;
	--*)
		die "unrecognised option: '$arg'" ;;
	*)
		break ;;
	esac
done

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
	echo "=== Unpacking $rev in build/$rev ==="
	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
	name="$2"
	for config in config.mak config.mak.autogen config.status
	do
		if test -e "../../$config"
		then
			cp "../../$config" "build/$rev/"
		fi
	done
	echo "=== Building $rev ($name) ==="
	(
		cd build/$rev &&
		if test -n "$GIT_PERF_MAKE_COMMAND"
		then
			sh -c "$GIT_PERF_MAKE_COMMAND"
		else
			make $GIT_PERF_MAKE_OPTS
		fi
	) || die "failed to build revision '$mydir'"
}

set_git_test_installed () {
	mydir=$1

	mydir_abs=$(cd $mydir && pwd)
	mydir_abs_wrappers="$mydir_abs_wrappers/bin-wrappers"
	if test -d "$mydir_abs_wrappers"
	then
		GIT_TEST_INSTALLED=$mydir_abs_wrappers
	else
		# Older versions of git lacked bin-wrappers;
		# fallback to the files in the root.
		GIT_TEST_INSTALLED=$mydir_abs
	fi
	export GIT_TEST_INSTALLED
	PERF_SET_GIT_TEST_INSTALLED=true
	export PERF_SET_GIT_TEST_INSTALLED
}

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

	PERF_RESULTS_PREFIX=
	if test "$mydir" = "."
	then
		unset GIT_TEST_INSTALLED
	elif test -d "$mydir"
	then
		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 "$mydir" 2>/dev/null) ||
		die "'$mydir' is neither a directory nor a valid revision"
		if [ ! -d build/$rev ]; then
			unpack_git_rev $rev
		fi
		build_git_rev $rev "$mydir"
		mydir=build/$rev

		PERF_RESULTS_PREFIX=build_$rev.
		set_git_test_installed "$mydir"
	fi
	export PERF_RESULTS_PREFIX

	run_one_dir "$@"
}

run_dirs () {
	while test $# -gt 0 -a "$1" != -- -a ! -f "$1"; do
		run_dirs_helper "$@"
		shift
	done
}

get_subsections () {
	section="$1"
	test -z "$GIT_PERF_CONFIG_FILE" && return
	git config -f "$GIT_PERF_CONFIG_FILE" --name-only --get-regex "$section\..*\.[^.]+" |
	sed -e "s/$section\.\(.*\)\..*/\1/" | sort | uniq
}

get_var_from_env_or_config () {
	env_var="$1"
	conf_sec="$2"
	conf_var="$3"
	conf_opts="$4" # optional

	# Do nothing if the env variable is already set
	eval "test -z \"\${$env_var+x}\"" || return

	test -z "$GIT_PERF_CONFIG_FILE" && return

	# Check if the variable is in the config file
	if test -n "$GIT_PERF_SUBSECTION"
	then
		var="$conf_sec.$GIT_PERF_SUBSECTION.$conf_var"
		conf_value=$(git config $conf_opts -f "$GIT_PERF_CONFIG_FILE" "$var") &&
		eval "$env_var=\"$conf_value\"" && return
	fi
	var="$conf_sec.$conf_var"
	conf_value=$(git config $conf_opts -f "$GIT_PERF_CONFIG_FILE" "$var") &&
	eval "$env_var=\"$conf_value\""
}

run_subsection () {
	get_var_from_env_or_config "GIT_PERF_REPEAT_COUNT" "perf" "repeatCount" "--int"
	: ${GIT_PERF_REPEAT_COUNT:=3}
	export GIT_PERF_REPEAT_COUNT

	get_var_from_env_or_config "GIT_PERF_DIRS_OR_REVS" "perf" "dirsOrRevs"
	set -- $GIT_PERF_DIRS_OR_REVS "$@"

	get_var_from_env_or_config "GIT_PERF_MAKE_COMMAND" "perf" "makeCommand"
	get_var_from_env_or_config "GIT_PERF_MAKE_OPTS" "perf" "makeOpts"

	get_var_from_env_or_config "GIT_PERF_REPO_NAME" "perf" "repoName"
	export GIT_PERF_REPO_NAME

	GIT_PERF_AGGREGATING_LATER=t
	export GIT_PERF_AGGREGATING_LATER

	if test $# = 0 -o "$1" = -- -o -f "$1"; then
		set -- . "$@"
	fi

	codespeed_opt=
	test "$GIT_PERF_CODESPEED_OUTPUT" = "true" && codespeed_opt="--codespeed"

	run_dirs "$@"

	if test -z "$GIT_PERF_SEND_TO_CODESPEED"
	then
		./aggregate.perl --results-dir="$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 "$json_res_file"
		send_data_url="$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

if test -n "$TEST_OUTPUT_DIRECTORY"
then
    TEST_RESULTS_DIR="$TEST_OUTPUT_DIRECTORY/test-results"
else
    TEST_RESULTS_DIR=test-results
fi

mkdir -p "$TEST_RESULTS_DIR"
get_subsections "perf" >"$TEST_RESULTS_DIR"/run_subsections.names

if test $(wc -l <"$TEST_RESULTS_DIR"/run_subsections.names) -eq 0
then
	if test -n "$GIT_PERF_SUBSECTION"
	then
		if test -n "$GIT_PERF_CONFIG_FILE"
		then
			die "no subsections are defined in config file '$GIT_PERF_CONFIG_FILE'"
		else
			die "subsection '$GIT_PERF_SUBSECTION' defined without a config file"
		fi
	fi
	(
		run_subsection "$@"
	)
elif test -n "$GIT_PERF_SUBSECTION"
then
	egrep "^$GIT_PERF_SUBSECTION\$" "$TEST_RESULTS_DIR"/run_subsections.names >/dev/null ||
		die "subsection '$GIT_PERF_SUBSECTION' not found in '$GIT_PERF_CONFIG_FILE'"

	egrep "^$GIT_PERF_SUBSECTION\$" "$TEST_RESULTS_DIR"/run_subsections.names | while read -r subsec
	do
		(
			GIT_PERF_SUBSECTION="$subsec"
			export GIT_PERF_SUBSECTION
			echo "======== Run for subsection '$GIT_PERF_SUBSECTION' ========"
			run_subsection "$@"
		)
	done
else
	while read -r subsec
	do
		(
			GIT_PERF_SUBSECTION="$subsec"
			export GIT_PERF_SUBSECTION
			echo "======== Run for subsection '$GIT_PERF_SUBSECTION' ========"
			run_subsection "$@"
		)
	done <"$TEST_RESULTS_DIR"/run_subsections.names
fi
debug log:

solving 03128d440a ...
found 03128d440a in https://public-inbox.org/git/005cc9a695f7f9b17190293821369763e9bae662.1623834515.git.ps@pks.im/ ||
	https://public-inbox.org/git/5488f0f4888fbc46378e2777d7daba1ec627b6c6.1621451532.git.ps@pks.im/
found c7b86104e1 in https://80x24.org/mirrors/git.git
preparing index
index prepared:
100755 c7b86104e12a6637b1084d6e02743f6c36df9265	t/perf/run

applying [1/2] https://public-inbox.org/git/005cc9a695f7f9b17190293821369763e9bae662.1623834515.git.ps@pks.im/
diff --git a/t/perf/run b/t/perf/run
index c7b86104e1..03128d440a 100755

Checking patch t/perf/run...
Applied patch t/perf/run cleanly.

skipping https://public-inbox.org/git/5488f0f4888fbc46378e2777d7daba1ec627b6c6.1621451532.git.ps@pks.im/ for 03128d440a
index at:
100755 03128d440a3dd15891cb6325a0fa036c3cff2f72	t/perf/run

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