[matter] disable coloured output if stdout is not a tty

matter/matter/main.py

@@ -20,7 +20,7 @@ from matter.binpms.base import BaseBinaryPMS, BaseBinaryResourceLock
 from matter.builder import PackageBuilder
 from matter.lock import MatterResourceLock
 from matter.output import purple, darkgreen, print_info, \
-    print_warning, print_error
+    print_warning, print_error, is_stdout_a_tty, nocolor
 from matter.spec import SpecParser, MatterSpec
 
 
@@ -173,6 +173,10 @@ def main():
     Main App.
     """
 
+    # disable color if standard output is not a TTY
+    if not is_stdout_a_tty():
+        nocolor()
+
     # Load Binary PMS modules
     import matter.binpms as _pms
     pms_dir = os.path.dirname(_pms.__file__)