Can't show ansi color on windows if use git bash

formatting_windows.py の initialize_or_disable から始め、Windows 環境が現在どのように colorama を初期化するかどうかを判断しているかを調べます。Git Bash での動作を再現し、その後、他の Windows シェルが既存の処理を維持する一方で、Git Bash が不要なラッピングを回避することを確認します。要求された設定オプションのスコープと動作も確定する必要があります。

Description

When using fire in Git Bash on Windows, the initialize_or_disable function in the formatting_windows.py unnecessarily invokes colorama.init(wrap=True) even though Git Bash already supports native ANSI escape sequences. This behavior causes issues, such as double-wrapped output or incorrect handling of ANSI sequences, which can lead to degraded user experience or unexpected output.

Steps to Reproduce

1. Use Git Bash on a Windows system.

2. Run a script that uses fire with formatting enabled.

3. Observe that the output is handled incorrectly due to the invocation of colorama.init(wrap=True).

Root Cause Analysis

The initialize_or_disable function currently does not differentiate between Git Bash and other Windows environments like cmd.exe or powershell.exe. Specifically:

• Git Bash natively supports ANSI escape sequences.

• The function does not explicitly check for Git Bash and thus assumes it must handle formatting via colorama.

• This leads to colorama.init(wrap=True) being invoked unnecessarily, causing redundant processing and potential output issues.

Proposed Solution

Add an explicit check for Git Bash environments in the initialize_or_disable function. This can be achieved by inspecting environment variables such as MSYSTEM or TERM, which are typically set in Git Bash.

Additionally, provide a configuration option to control whether the formatting_windows functionality is enabled or disabled. This will allow users to explicitly manage how formatting is handled.

Suggested Changes

Modify initialize_or_disable to detect Git Bash:

def initialize_or_disable():
    is_git_bash = os.environ.get('MSYSTEM') or os.environ.get('TERM') in ['xterm', 'xterm-256color']
    if is_git_bash:
        print("Detected Git Bash, skipping colorama.init")
        return  # Skip colorama initialization for Git Bash
    
    # Existing logic for colorama and ANSI initialization

Add a configuration flag to enable or disable the formatting_windows logic explicitly. For example:

ENABLE_FORMATTING_WINDOWS = os.environ.get('ENABLE_FORMATTING_WINDOWS', '1') == '1'

if ENABLE_FORMATTING_WINDOWS:
    initialize_or_disable()
else:
    print("Formatting for Windows is disabled")

Please consider implementing the above solution