bash补全不适用于MSYS Bash。正则表达式语法错误

Question

我试图为MSYS bash安装bash完成，但它似乎包含一些语法错误。它会失败，并显示以下消息

bash: /usr/local/share/bash-completion/bash_completion: line 625: syntax error in conditional expression: unexpected token `('
bash: /usr/local/share/bash-completion/bash_completion: line 625: syntax error near `^(\'
bash: /usr/local/share/bash-completion/bash_completion: line 625: `    if [[ $cur =~ ^(\$\{?)([A-Za-z0-9_]*)$ ]]; then'

以下是失败的代码

# Complete variables.
# @return  True (0) if variables were completed, 
#          False (> 0) if not.
_variables()
{
    if [[ $cur =~ ^(\$\{?)([A-Za-z0-9_]*)$ ]]; then
        [[ $cur == *{* ]] && local suffix=} || local suffix=
        COMPREPLY+=( $( compgen -P ${BASH_REMATCH[1]} -S "$suffix" -v -- \
            "${BASH_REMATCH[2]}" ) )
        return 0
    fi
    return 1
}

Answer 1

您使用的是bash完成的beta版本(1.99)，您可以尝试使用最新的稳定版本(1.3)

如果你真的需要测试版，你需要在行中的正则表达式^(\$\{?)([A-Za-z0-9_]*)$两边加上引号，if [[ $cur =~ ^(\$\{?)([A-Za-z0-9_]*)$ ]]; then对操作符=~的处理根据bash版本的不同而不同(IIRC3.2之前的版本需要引号)