tests: add --use-system-commands

This change allows to use commands from $PATH rather than from
$top_builddir. There two basic use cases:

* check differences between installed and git version
  run.sh --use-system-command --show-diff

* check system binaries by upstream tests (for example tests from
  src.rpm package)

Signed-off-by: Karel Zak <kzak@redhat.com>

1 files changed, 29 insertions, 5 deletions

diff --git a/tests/functions.sh b/tests/functions.sh
index 2fb0ddb5f..ab607c4ce 100644
--- a/tests/functions.sh
+++ b/tests/functions.sh
@@ -75,9 +75,19 @@ function ts_report {
 }
 
 function ts_check_test_command {
-	if [ ! -x "$1" ]; then
-		ts_skip "${1##*/} not found"
-	fi
+	case "$1" in
+	*/*)
+		# paths
+		if [ ! -x "$1" ]; then
+			ts_skip "${1##*/} not found"
+		fi
+		;;
+	*)
+		# just command names (e.g. --use-system-commands)
+		local cmd=$1
+		type "$cmd" >/dev/null 2>&1 || ts_skip "missing in PATH: $cmd"
+		;;
+	esac
 }
 
 function ts_check_prog {
@@ -254,8 +264,20 @@ function ts_init_env {
 	top_srcdir=$(ts_abspath $top_srcdir)
 	top_builddir=$(ts_abspath $top_builddir)
 
-	# some ul commands search other ul commands in $PATH
-	export PATH="$top_builddir:$PATH"
+	# We use helpser always from build tree
+	ts_helpersdir="${top_builddir}/"
+
+	TS_USE_SYSTEM_COMMANDS=$(ts_has_option "use-system-commands" "$*")
+	if [ "$TS_USE_SYSTEM_COMMANDS" == "yes" ]; then
+		# Don't define anything, just follow current PATH
+		ts_commandsdir=""
+	else
+		# The default is to use commands from build tree
+		ts_commandsdir="${top_builddir}/"
+
+		# some ul commands search other ul commands in $PATH
+		export PATH="$ts_commandsdir:$PATH"
+	fi
 
 	TS_SCRIPT="$mydir/$(basename $0)"
 	TS_SUBDIR=$(dirname $TS_SCRIPT)
@@ -319,6 +341,8 @@ function ts_init_env {
 	if [ "$TS_VERBOSE" == "yes" ]; then
 		echo
 		echo "     script: $TS_SCRIPT"
+		echo "   commands: $ts_commandsdir"
+		echo "    helpers: $ts_helpersdir"
 		echo "    sub dir: $TS_SUBDIR"
 		echo "    top dir: $TS_TOPDIR"
 		echo "       self: $TS_SELF"