Question

我有以下bash脚本，我希望在其中使用跨不同函数重用变量b，但仍能够使用位置参数进行变量替换

#!/bin/bash

function boo() {
  echo "$1"
  b="this is b and $1"
  echo "$b"
}

function foobar() {
  echo "$1"
  echo "$b"
}
boo "this is argument 1 for boo"
foobar "this is argument 1 for foobar"

当前输出

$ ./script.sh
this is argument 1 for boo
this is b and this is argument 1 for boo
this is argument 1 for foobar
this is b and this is argument 1 for boo

如何修改脚本以使其输出

$ ./script.sh
this is argument 1 for boo
this is b and this is argument 1 for boo
this is argument 1 for foobar
this is b and this is argument 1 for foobar

Answer 1

为melponene推荐功能。这似乎是我所需要的。函数不是更依赖于公共变量进行变量扩展，而是更合适

#!/bin/bash
function b_func(){
 echo "this is b and $*"
}

function boo() {
  echo "$1"
  b_var="$(b_func $1)"
  echo "$b_var"
}

function foobar() {
  echo "$1"
  b_var="$(b_func $1)"
  echo "$b_var"
}
boo "this is argument 1 for boo"
foobar "this is argument 1 for foobar"

输出：

$ ./script.sh
this is argument 1 for boo
this is b and this is argument 1 for boo
this is argument 1 for foobar
this is b and this is argument 1 for foobar

函数内部全局变量的Bash变量替换

1 个答案: