chore: in quality tests, only colorize quality output if in a tty (#1398

)

Permit piping "make validate" (from test/quality) to a file without filling it with control
characters.

Signed-off-by: Will Murphy <will.murphy@anchore.com>

test/quality/gate.py

@@ -90,6 +90,17 @@ class bcolors:
     UNDERLINE = '\033[4m'
     RESET = '\033[0m'
 
+if not sys.stdout.isatty():
+    bcolors.HEADER = ""
+    bcolors.OKBLUE = ""
+    bcolors.OKCYAN = ""
+    bcolors.OKGREEN = ""
+    bcolors.WARNING = ""
+    bcolors.FAIL = ""
+    bcolors.BOLD = ""
+    bcolors.UNDERLINE = ""
+    bcolors.RESET = ""
+
 def show_results_used(results: list[artifact.ScanResult]):
     print(f"   Results used:")
     for idx, result in enumerate(results):