btrfs-progs: tests: add script to check global prerequisities

Check for each test directory if the utilities requested by
check_global_prereq can be found on the system.

Signed-off-by: David Sterba <dsterba@suse.com>

tests/check-setup.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+#
+# Check that the system setup and configuration are sufficient for all tests to run
+
+for dir in *-tests; do
+	missing=
+	echo "Checking prerequisities for: $dir"
+	for prog in $(find "$dir" -name 'test.sh' -exec grep check_global_prereq '{}' \; | sort -u); do
+		if [ "$prog" = check_global_prereq ]; then
+			continue
+		fi
+		if type -p "$prog" &> /dev/null; then
+			echo "Check $prog: OK"
+		else
+			echo "Check $prog: MISSING"
+			missing+=" $prog"
+		fi
+	done
+
+	if ! [ -z "$missing" ]; then
+		echo "MISSING: $missing"
+	fi
+done