From b3798cf9508657cf6a6041c942613dec2f57d59c Mon Sep 17 00:00:00 2001
From: Jakub Jezek <jakub@orbi.tools>
Date: Mon, 28 Dec 2020 14:12:47 +0100
Subject: [PATCH] reverse pype.lib.terminal

---
 pype/lib/terminal.py | 69 ++++++++++++++------------------------------
 1 file changed, 21 insertions(+), 48 deletions(-)

diff --git a/pype/lib/terminal.py b/pype/lib/terminal.py
index d54d52e9be..a47d58ec3b 100644
--- a/pype/lib/terminal.py
+++ b/pype/lib/terminal.py
@@ -11,14 +11,8 @@
 #   ..---===[[ PyP3 Setup ]]===---...
 #
 import re
-import os
-import sys
-try:
-    import blessed
-    term = blessed.Terminal()
-
-except Exception:
-    term = None
+import time
+import threading
 
 
 class Terminal:
@@ -30,49 +24,28 @@ class Terminal:
     Using **PYPE_LOG_NO_COLORS** environment variable.
     """
 
-    # shortcuts for colorama codes
+    # Is Terminal initialized
+    _initialized = False
+    # Thread lock for initialization to avoid race conditions
+    _init_lock = threading.Lock()
+    # Use colorized output
+    use_colors = True
+    # Output message replacements mapping - set on initialization
     _sdict = {}
-    if term:
-        _SB = term.bold
-        _RST = ""
-        _LR = term.tomato2
-        _LG = term.aquamarine3
-        _LB = term.turquoise2
-        _LM = term.slateblue2
-        _LY = term.gold
-        _R = term.red
-        _G = term.green
-        _B = term.blue
-        _C = term.cyan
-        _Y = term.yellow
-        _W = term.white
 
-        # dictionary replacing string sequences with colorized one
-        _sdict = {
+    @staticmethod
+    def _initialize():
+        """Initialize Terminal class as object.
 
-            r">>> ": _SB + _LG + r">>> " + _RST,
-            r"!!!(?!\sCRI|\sERR)": _SB + _R + r"!!! " + _RST,
-            r"\-\-\- ": _SB + _C + r"--- " + _RST,
-            r"\*\*\*(?!\sWRN)": _SB + _LY + r"***" + _RST,
-            r"\*\*\* WRN": _SB + _LY + r"*** WRN" + _RST,
-            r"  \- ": _SB + _LY + r"  - " + _RST,
-            r"\[ ": _SB + _LG + r"[ " + _RST,
-            r"\]": _SB + _LG + r"]" + _RST,
-            r"{": _LG + r"{",
-            r"}": r"}" + _RST,
-            r"\(": _LY + r"(",
-            r"\)": r")" + _RST,
-            r"^\.\.\. ": _SB + _LR + r"... " + _RST,
-            r"!!! ERR: ":
-                _SB + _LR + r"!!! ERR: " + _RST,
-            r"!!! CRI: ":
-                _SB + _R + r"!!! CRI: " + _RST,
-            r"(?i)failed": _SB + _LR + "FAILED" + _RST,
-            r"(?i)error": _SB + _LR + "ERROR" + _RST
-        }
+        First check if colorized output is disabled by environment variable
+        `PYPE_LOG_NO_COLORS` value. By default is colorized output turned on.
 
-    def __init__(self):
-        pass
+        Then tries to import python module that do the colors magic and create
+        it's terminal object. Colorized output is not used if import of python
+        module or terminal object creation fails.
+
+        Set `_initialized` attribute to `True` when is done.
+        """
 
         from pype.lib import env_value_to_bool
         use_colors = env_value_to_bool(
@@ -218,7 +191,7 @@ class Terminal:
                     time.sleep(0.1)
 
         # if we dont want colors, just print raw message
-        if not T._sdict or os.environ.get('PYPE_LOG_NO_COLORS'):
+        if not T.use_colors:
             return message
 
         message = re.sub(r'\[(.*)\]', '[ ' + T._SB + T._W +