reference > Flags

--scan-unknown-extensions

Accepted by

opengrep scan, opengrep ci

Also spelled

--skip-unknown-extensions

Default

false

See also

--lang, --include, --force-exclude

Opengrep selects the language of each file by its extension. By default, a file named on the command line whose extension belongs to no language is skipped, and a scan with no other targets reports nothing to scan.

With --scan-unknown-extensions, such a file is scanned as the language given by --lang, or, without --lang, with the languages of the rules. The flag applies only to files named on the command line; for files found under directory targets, the extension still decides. --skip-unknown-extensions is the default.

## Examples

### A file whose extension names no language

rules:  - id: find-eval    pattern: eval(...)    message: found eval    languages: [python]    severity: WARNING

eval(1)

$ opengrep scan --config rule.yaml script.unknown 2>&1
 ╭┮┭╮ Opengrep
┌┼┼┼┘ the open source static code analysis engine
╰┶┵╯  version X.Y.Z

nothing to scan

no findings
$ opengrep scan -q --config rule.yaml --scan-unknown-extensions script.unknown
script.unknown

  warn  find-eval
  found eval

     1: eval(1)

Without the flag, the file is not scanned, and Opengrep reports that there is nothing to scan.