是 have
bash中的关键字?或者bash完成脚本使用的语言不是bash?
have gcc &&
_gcc()
{
是很常见。看到: grep "have .* &&" /etc/bash_completion.d/*
我找不到关于我看过的bash完成教程的任何信息,我找不到任何信息 man bash
。谷歌“有”也很难。我在哪里可以找到相关文档?
我猜这与确保那里有关 gcc
存在于 PATH
?
编辑:是的。 /etc/bash_completion
包含:
have()
{
unset -v have
# Completions for system administrator commands are installed as well in
# case completion is attempted via `sudo command ...'.
PATH=$PATH:/sbin:/usr/sbin:/usr/local/sbin type $1 &>/dev/null &&
have="yes"
}
have
和 _have
只是在基础中定义的两个函数 bash_completion
文件。在两者之间,它们形成了内置的包装 type
用于确定特定命令/程序是否可用的命令。
# This function checks whether we have a given program on the system.
#
_have()
{
# Completions for system administrator commands are installed as well in
# case completion is attempted via `sudo command ...'.
PATH=$PATH:/usr/sbin:/sbin:/usr/local/sbin type $1 &>/dev/null
}
# Backwards compatibility for compat completions that use have().
# @deprecated should no longer be used; generally not needed with dynamically
# loaded completions, and _have is suitable for runtime use.
have()
{
unset -v have
_have $1 && have=yes
}
have
和 _have
只是在基础中定义的两个函数 bash_completion
文件。在两者之间,它们形成了内置的包装 type
用于确定特定命令/程序是否可用的命令。
# This function checks whether we have a given program on the system.
#
_have()
{
# Completions for system administrator commands are installed as well in
# case completion is attempted via `sudo command ...'.
PATH=$PATH:/usr/sbin:/sbin:/usr/local/sbin type $1 &>/dev/null
}
# Backwards compatibility for compat completions that use have().
# @deprecated should no longer be used; generally not needed with dynamically
# loaded completions, and _have is suitable for runtime use.
have()
{
unset -v have
_have $1 && have=yes
}