如何将长字符串分成多行分配给linux bash脚本中的变量

Question

我正在努力编写一个 bash 脚本，其中包含一个带有长字符串值的变量。当我将字符串分成多行时，它会抛出错误。如何将字符串拆分为多行并分配给变量？

Answer 1

一个建议：

x='Lorem ipsum dolor sit amet, consectetur '\
'adipiscing elit, sed do eiusmod tempor '\
'incididunt ut labore et dolore magna aliqua.'

其结果是预期的：

$ printf '%s\n' "$x"
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

Answer 2

将长字符串分配为数组中的多个子字符串可以使代码更具美感：

#!/bin/bash

text=(
    'Contrary to popular'
    'belief, Lorem Ipsum'
    'is not simply'
    'random text. It has'
    'roots in a piece'
    'of classical Latin'
    'literature from 45'
    'BC, making it over'
    '2000 years old.'
)

# output one line per string in the array:
printf '%s\n' "${text[@]}"

# output all strings on a single line, delimited by space (first
# character of $IFS), and let "fmt" format it to 45 characters per line
printf '%s\n' "${text[*]}" | fmt -w 45