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: "  "]