test: add TEST_NO_PLUGIN and PLUGIN prereq

License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>

test/sharness/lib/test-lib.sh

@@ -40,12 +40,13 @@ SHARNESS_LIB="lib/sharness/sharness.sh"
 
 # Please put go-ipfs specific shell functions below
 
+TEST_OS="$(uname -s | tr '[a-z]' '[A-Z]')"
+
 # grab + output options
 test "$TEST_NO_FUSE" != 1 && test_set_prereq FUSE
 test "$TEST_EXPENSIVE" = 1 && test_set_prereq EXPENSIVE
 test "$TEST_NO_DOCKER" != 1 && type docker >/dev/null 2>&1 && test_set_prereq DOCKER
-
-TEST_OS=$(uname -s | tr [a-z] [A-Z])
+test "$TEST_NO_PLUGIN" != 1 && test "$TEST_OS" = "LINUX" && test_set_prereq PLUGIN
 
 # Set a prereq as error messages are often different on Windows/Cygwin
 expr "$TEST_OS" : "CYGWIN_NT" >/dev/null || test_set_prereq STD_ERR_MSG