Text Transformer
Searches for a pattern in a file line by line and outputs a replacement string that can contain any captured groups.
Install
npm install --global tfr
Examples
# prints out all the lines that look like URLs as links
tfr '^(https?://.*)' -r '<a href="$1">$1</a>' example.txt
# find all the files that have a parent directory called lib
find . | tfr '\/lib\/' -r '$_'
# print how many 500 errors are in the access logs per hour
cat access.log | trf '^(.*?T\d+).* 500 ' | sort | uniq -c
Usage
tfr <pattern> [files..]
Search and replace strings in a file e.g. tfr '(.*?) (.*?)' test.txt. By default
matching groups will be printed out separated by tabs
Positionals:
pattern The pattern to match e.g. ^(.*)$ [string]
files The files to search [string]
Options:
--version Show version number [boolean]
--help Show help [boolean]
--replacement, -r The replacement text that can use replacement variables for
matched groups i.e. $1 $2 etc. [string]
--delimiter, -d The output delimiter, defaults to a tab
[string] [default: " "]