ack

A search tool like grep, optimized for developers.

See also: `rg`, which is much faster.

More information.

• Search for files containing a string or regular expression in the current directory recursively:

ack "{search_pattern}"

• Search for a case-insensitive pattern:

ack --ignore-case "{search_pattern}"

• Search for lines matching a pattern, printing [o]nly the matched text and not the rest of the line:

ack -o "{search_pattern}"

• Limit search to files of a specific type:

ack --type={ruby} "{search_pattern}"

• Do not search in files of a specific type:

ack --type=no{ruby} "{search_pattern}"

• Count the total number of matches found:

ack --count --no-filename "{search_pattern}"

• Print the file names and the number of matches for each file only:

ack --count --files-with-matches "{search_pattern}"

• List all the values that can be used with `--type`:

ack --help-types

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