How can I tell ack to search in two distinct directories?

Question

Is it possible to ask ack to search and include results from multiple root directories, rather than searching from the current shell working directory?

score 2 · Accepted Answer · answered Nov 11 '16 at 20:03

Yes, you can specify any number of files or directories you want to search.

Look at the first line of ack --help.

Usage: ack [OPTION]... PATTERN [FILES OR DIRECTORIES]

(The ack manpage has a similar usage statement)

So you can do

ack needle this_haystack/ that/haystack/ other/haystack*.txt

How can I tell ack to search in two distinct directories?

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