minigrep

Kind of minigrep in Rust. Just for learing some Rust.

Usage

Usage: ./minigrep -f FILE [options]

Options:
    -p, --pattern PATTERN
                        set pattern to find
    -s, --substitute SUBSTITUTE
                        subsitute pattern with this
    -f, --file FILE     file to search pattern in
    -i, --insensitive   case insensitive matching - not valued in case of a
                        regex pattern
    -e, --regex         interpret pattern as regular expression
    -n, --number        show line numbers of matches
    -r, --recursiv      search FILE recursiv
    -a, --from START_AT_LINE_NUMBER
                        start matching at line number
    -z, --until END_AT_LINE_NUMBER
                        match as long as line number is smaller
    -h, --help          print this help menu

Regex

The Regex is based on the library regex. So Regex syntax can be used as documented there. Example: given the file test_regex.txt has the content

2012-03-14, 2013-01-01 and 2014-07-05

the command

./minigrep -s '$m/$d/$y' \
-p "(?P<y>\d{4})-(?P<m>\d{2})-(?P<d>\d{2})" \
-e -f ~/test_regex.txt 

will print

03/14/2012, 01/01/2013 and 07/05/2014