用sed提取单引号之间的字符串

Question

I have a thousand Delphi files (.pas), and I need to extract text from them.

The text I need is between single quotes (Pascal strings), and I only need the strings called from a particular function. Eg: my_function('This is the string I need')

I have extracted all the lines that appear the function and added to a text file, using find and grep, but I'm unable to extract the strings.

I've been looking around the Internet for a regex to extract this strings, but I don't know how to do this. I'm trying with this:

sed "s/.*my_function\('(.*)'\).*/\1/" all_the_strings.txt > my_out_file.txt

But it doesn't work (I'm not an expert with regex...).

Can you help me with this?

Answer 1

这可能对您有用（GNU sed）：

sed -nr "s/.*my_function\('([^']*)'\).*/\1/p" all_the_strings.txt > my_out_file.txt

Answer 2

您可以尝试以下方法：

sed 's/.*my_function(.\(.*\).).*/\1/;'

Answer 3

Your solution doesn't escape parentheses at right place. In sed they are not special metacharacters, so they match literal.

You must escape them to do grouping, so change the regexp to escape the internal ones, like:

sed "s/.*my_function('\(.*\)').*/\1/" all_the_strings.txt > my_out_file.txt