Four correctness fixes to the GitLab CI expression parser in
internal/cicontext/eval.go:
- Multi-line: \n and \r are now treated as whitespace in skipWS so
block-scalar or folded-scalar if: values with || / && on continuation
lines evaluate correctly instead of falling back to permissive true.
- ${VAR} curly-brace variable syntax now supported in parseValue.
- Regex flags (/pattern/i, /pattern/m, /pattern/s) are now consumed and
translated to Go (?i)/(?m)/(?s) prefixes via applyRegexFlags.
- Variable on RHS of =~ / !~: when the right operand is $VAR, the
variable's value is interpreted as a /regex/[flags] string via
extractRegexFromString; non-regex values fall back to permissive true.
Adds 16 new unit tests covering all four cases and a testdata fixture
(rules_if_expr.yml) exercising multi-line, ${VAR}, and /pattern/i in a
real pipeline with context flags.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
