ripgrep: print only filenames matching pattern

Question

Using ripgrep (rg), can I print only the filenames which match a given pattern?

There are two separate things I'm trying to do:

1. Match the pattern to the pathname itself (like ag -g pattern)
2. Match the pattern to the contents of the file and print only the filename

I can't work out how to do either one.

Answer 1

1. Print only the filename where the contents match:

   rg -l regex
   # OR: long-option form
   rg --files-with-matches regex
   

2. Print only the directory entries (filenames) which match the given pattern under <directory>:

   rg -g '*glob*' --files <directory>
   

   The -g specifies a glob whose rules match .gitignore patterns.

   Precede a glob with a ! to exclude it.

   Use --iglob instead of -g for a case-insensitive glob.

   --files prints each file that would be searched without actually performing the search.

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A less efficient way to do (2) would be:

rg -lg '*pattern*' . <directory>

The . says to match any character inside the files (so it won't match on empty files).