[英]How to change all bash variables to lowercase in sed
I have hundreds of bash scripts that have upper case variables like so我有数百个 bash 脚本,它们具有像这样的大写变量
#!/bin/bash
FOO=bar
RED=blue
UP=down
I am making them lower case like so我像这样把它们变成小写
for var in FOO RED UP
do
grep -rl '\<$var\>' | xargs sed -i 's/\<$var\>/$(echo "$var" | tr '[:upper:]' '[:lower:]')/g"
done
Now I have encountered files with hundreds of variable declerations and it is becoming too difficult to copy paste each one.现在我遇到了有数百个变量 declerations 的文件,并且复制粘贴每个文件变得太困难了。 I tried automating the process like so
我试过像这样自动化这个过程
grep -rl '\w*=[^=]' | xargs sed -E "s/(\w*)=([^=])/$(echo \1 | tr '[:upper:]' '[:lower:]')=\2/g"
But the problem lies in $(echo \1...)
which obviously will fail但问题在于
$(echo \1...)
显然会失败
Is there a way to quickly find all vars and convert to lowercase using regex?有没有办法快速找到所有变量并使用正则表达式转换为小写?
EDIT:编辑:
As requested, assume we have 1 file like so根据要求,假设我们有 1 个这样的文件
#!/bin/bash
AAA="hello world"
AAB="hello world"
...
ZZZ="hello world"
And assume I have a large number (>10000) nested (in directories or sub-directories) like so并假设我有大量(> 10000)嵌套(在目录或子目录中)像这样
#!/bin/bash
echo $AAA
echo $AAB
...
echo $ZZZ
if [ $AAA == "foo" ]
then
#do something
fi
I want to search for any assignments ( \w*=[!=]
) and then do a word replace on that variable to make it lower case.我想搜索任何赋值(
\w*=[!=]
),然后对该变量进行单词替换以使其小写。 Note the if
condition, I through that in there to show that there may be a case of a word followed by 2 equations, but we are matching for only 1 equation (and no space)注意
if
条件,我通过那里的那个来表明可能存在一个单词后跟 2 个等式的情况,但我们只匹配 1 个等式(没有空格)
Edit 2: Note that I want only the variable names to be converted to lower case, not everything编辑 2:请注意,我只想将变量名转换为小写,而不是所有的
# Current Input
SOME_VAR="Humpty Dumpty had a great FALL"
# Desired Output
some_var="Humpty Dumpty had a great FALL"
The only solution that worked for me was to go through and replace the variable names to lower case in three steps唯一对我有用的解决方案是 go 通过三个步骤将变量名替换为小写
# Change all SOME_VAR=... to some_var=...
grep -rl '\w\+=' | xargs sed -i 's/\w\+=/\L&/g'
# Change all $SOME_VAR to $some_var
grep -rl '$\w\+' | xargs sed -i 's/$\w\+/\L&/g'
# Change all ${SOME_VAR} to ${some_var}
grep -rl '$\w\+' | xargs sed -i 's/${\w\+}/\L&/g'
Then I went back and changed the few environment variables back to upper case然后我回去把几个环境变量改回大写
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