需要帮助在Linux终端中使用sed编辑多个文件

Question

I am trying to do a simple operation here. Which is to cut a few characters from one file (style.css) do a find a replace on another file (client_custom.css) for more then 100 directories with different names

When I use the following command

for d in */; do sed -n 73p ~/assets/*/style.css | cut -c  29-35 | xargs -I :hex:  sed -i 's/!BGCOLOR!/:hex:/' ~/assets/*/client_custom.css $d; done

It keeps giving me the following error for all the directories

sed: couldn't edit dirname/: not a regular file

I am confused on why its giving me that error message explicitly gave the full path to the file. It works perfectly fine without a for loop .

Can anyone please help me out with this issue?

Answer 1

sed doesn't support folders as input.

for d in */;

puts folders into $d . If you write sed ... $d , then BASH will put the folder name into the arguments of sed and the poor tool will be confused.

Also ~/assets/*/client_custom.css since this will expand to all the files which match this pattern. So sed will be called once with all file names. You probably want to invoke sed once per file name.

Try

for f in ~/assets/*/client_custom.css; do
    ... | sed -i 's/!BGCOLOR!/:hex:/' $f
done

or, even better:

for f in ~/assets/*/client_custom.css; do
    ... | sed 's/!BGCOLOR!/:hex:/' "${f}.in" > "${f}"
done

(which doesn't overwrite the output file). This way, you can keep the "*.in" files, edit them with the patterns and then use sed to "expand" all the variables.