A number of Drush commands that output tabular data support a --filter option that allows rows from the output to be selected with simple logic expressions.
In its simplest form, the --filter option takes a simple string that indicates the value to filter by in the command's default filter field. For example, the role:list command's default filter field is perms; the output of the role:list command can be limited to only those roles that have a specified permission:
$ drush role:list --filter='post comments'
authenticated:
label: 'Authenticated user'
perms:
- 'access comments'
- 'access content'
- 'access shortcuts'
- 'access site-wide contact form'
- 'access user contact forms'
- 'post comments'
- 'search content'
- 'skip comment approval'
- 'use text format basic_html'
Note that not all commands have a default filter field.
Other fields in the output may be searched by using a simple expression in the --filter term. For example, to list only the enabled extensions with the pm:list command, you could run:
$ drush pm:list --filter='status=enabled'
To search for fields that contain a string using the operator *=, or match a regular expression with the ~= operator. For example, to find all views whose machine name contains the word "content":
drush views:list --filter='machine-name*=content'
To use a regular expression to find any core requirement notice whose title contains either "php" or "gd"
drush core:requirements --filter='title~=#(php|gd)#i'
Finally, filter expressions may also use logical-and (&&) or logical-or (||) operations to separate multiple terms. Parenthesis are not supported.