[BUG] Weird output from from_ansi

The output from the method from_ansi is not correctly rendered by console.Console.

• This example forces colored output in a subprocess and then prints the output to the terminal
• directly (no pipeing) ✔️
• pipeing and then printing the output using print() ✔️
• pipeing and then printing the output using Console.print() ❌

Test script

import atexit
import os
from pathlib import Path
from subprocess import PIPE, Popen
from tempfile import NamedTemporaryFile

from rich import console, text


console_out = console.Console()
console_err = console.Console(stderr=True)


with NamedTemporaryFile(delete=False) as s, NamedTemporaryFile(delete=False) as t:
    txt = b"""#include <stdio.h>\nint main() {\nint a=1;\nreturn 0;\n}"""
    s.write(txt)

cmd = ["gcc", "-Wall", "-fdiagnostics-color=always", "-x", "c", s.name, "-o", t.name]

console_out.print("Expected output as reference", style="magenta")
with Popen(cmd) as proc:
    proc.communicate()

console_out.print("Just print piped err to the terminal", style="magenta")
with Popen(cmd, stdout=PIPE, stderr=PIPE) as proc:
    out, err = proc.communicate()
print(err.decode("utf-8"))

console_out.print("Rich output - verbatim (expected like that)", style="magenta")
console_err.print(err.decode("utf-8"))

console_out.print("Rich output - from ansi", style="magenta")
err_ansi = text.Text.from_ansi(err.decode("utf-8"))
console_err.print(err_ansi)


@atexit.register
def cleanup():
    os.remove(s.name)
    os.remove(t.name)

Screenshot of bug:

Platform

Click to expand

Windows 10, Windows Terminal, PowerShell Core Windows 10, Windows Terminal, cmd.exe

C:\> python -m rich.diagnose
╭───────────────────────── <class 'rich.console.Console'> ─────────────────────────╮
│ A high level console interface.                                                  │
│                                                                                  │
│ ╭──────────────────────────────────────────────────────────────────────────────╮ │
│ │ <console width=138 ColorSystem.TRUECOLOR>                                    │ │
│ ╰──────────────────────────────────────────────────────────────────────────────╯ │
│                                                                                  │
│     color_system = 'truecolor'                                                   │
│         encoding = 'utf-8'                                                       │
│             file = <_io.TextIOWrapper name='<stdout>' mode='w' encoding='utf-8'> │
│           height = 37                                                            │
│    is_alt_screen = False                                                         │
│ is_dumb_terminal = False                                                         │
│   is_interactive = True                                                          │
│       is_jupyter = False                                                         │
│      is_terminal = True                                                          │
│   legacy_windows = False                                                         │
│         no_color = False                                                         │
│          options = ConsoleOptions(                                               │
│                        size=ConsoleDimensions(width=138, height=37),             │
│                        legacy_windows=False,                                     │
│                        min_width=1,                                              │
│                        max_width=138,                                            │
│                        is_terminal=True,                                         │
│                        encoding='utf-8',                                         │
│                        max_height=37,                                            │
│                        justify=None,                                             │
│                        overflow=None,                                            │
│                        no_wrap=False,                                            │
│                        highlight=None,                                           │
│                        markup=None,                                              │
│                        height=None                                               │
│                    )                                                             │
│            quiet = False                                                         │
│           record = False                                                         │
│         safe_box = True                                                          │
│             size = ConsoleDimensions(width=138, height=37)                       │
│        soft_wrap = False                                                         │
│           stderr = False                                                         │
│            style = None                                                          │
│         tab_size = 8                                                             │
│            width = 138                                                           │
╰──────────────────────────────────────────────────────────────────────────────────╯
╭── <class 'rich._windows.WindowsConsoleFeatures'> ───╮
│ Windows features available.                         │
│                                                     │
│ ╭─────────────────────────────────────────────────╮ │
│ │ WindowsConsoleFeatures(vt=True, truecolor=True) │ │
│ ╰─────────────────────────────────────────────────╯ │
│                                                     │
│ truecolor = True                                    │
│        vt = True                                    │
╰─────────────────────────────────────────────────────╯
╭────── Environment Variables ───────╮
│ {                                  │
│     'TERM': None,                  │
│     'COLORTERM': None,             │
│     'CLICOLOR': None,              │
│     'NO_COLOR': None,              │
│     'TERM_PROGRAM': None,          │
│     'COLUMNS': '138',              │
│     'LINES': None,                 │
│     'JPY_PARENT_PID': None,        │
│     'VSCODE_VERBOSE_LOGGING': None │
│ }                                  │
╰────────────────────────────────────╯
platform="Windows"
C:\> pip freeze | findstr rich
rich==12.0.0

[swaldhoer]

Works, thanks for the fast fix.

[github-actions[bot]]

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