[equo] fix tty colored output handling, re-add --color

client/solo/commands/help.py

@@ -71,6 +71,11 @@ class SoloHelp(SoloCommand):
             epilog="http://www.sabayon.org",
             formatter_class=ColorfulFormatter)
 
+        # filtered out in solo.main. Will never get here
+        parser.add_argument(
+            "--color", action="store_true",
+            default=None, help=_("force colored output"))
+
         descriptors = SoloCommandDescriptor.obtain()
         descriptors.sort(key = lambda x: x.get_name())
         group = parser.add_argument_group("command", "available commands")

client/solo/main.py

@@ -18,7 +18,8 @@ import pdb
 
 from entropy.i18n import _
 from entropy.output import print_error, print_warning, bold, purple, \
-    teal, blue, darkred, darkgreen, readtext, print_generic, TextInterface
+    teal, blue, darkred, darkgreen, readtext, print_generic, TextInterface, \
+    is_stdout_a_tty, nocolor
 from entropy.const import etpConst, const_convert_to_rawstring, \
     const_debug_enabled
 from entropy.exceptions import SystemDatabaseError, OnlineMirrorError, \
@@ -249,6 +250,13 @@ def warn_live_system():
 
 def main():
 
+    is_color = "--color" in sys.argv
+    if is_color:
+        sys.argv.remove("--color")
+
+    if not is_color and not is_stdout_a_tty():
+        nocolor()
+
     warn_version_mismatch()
 
     install_exception_handler()