How files can be processed with regex?
I have the feeling that Perl is more Powerful than SED. Certainly, I'm more familiar with Perl.
This following example bash script
- reads all the page-*.html files in the site folder,
- backups the html files to .bak,
- processes the files by pipes,
- adds a empty line at the end of the file due to
(cat "$file.bak"; echo -e "\n"),
- replaces the text regex with replacement using Perl,
- and adds a comment after the head tag.
#!/bin/bash for file in site/page-*.html do echo "Process $file"; mv "$file" "$file.bak"; # Read file, process regex and write file (cat "$file.bak"; echo -e "\n") \ | perl -p -e"s/regex/replacement/g" \ | perl -p -e"s/(<head>)/\1\n<!--Automatically processed-->/" \ > "$file"; done
There are other ways for looping through files with bash.
This script is short, simple and powerful. Very handy.