text

The text tools

The tools of the text domain, on /etc/os-release: the distribution, its family and its major version.

How to read it

• text.lines: the lines that are not empty, each without blanks at its ends.
• text.match($line, '^([A-Z_]+)="?([^"]*)"?$'): the groups of the first match, 0 for the whole, 1, 2… for each group; array() when nothing matches. The pattern is a regular expression of Go (RE2), checked by the validation.
• text.lower, text.words (cut at the blanks), text.join (a list back into a text), text.length (characters, not bytes), text.split (cut at a separator), text.is_number (is it the writing of a number?).
• skip passes the turn for a rolling distribution, which has no version.
• The other text tools: text.trim (blanks off the ends, examples/basics/first-collector), text.contains (examples/mechanics/variables) and text.like, a pattern with * and ? (examples/basics/loops).

To adapt it

• /etc/os-release holds PRETTY_NAME, VERSION_CODENAME, SUPPORT_END on some distributions: read them the same way.