Function celFileMatcherMacroExpander

modules/caddyhttp/fileserver/matcher.go:225–271

()

}

func celFileMatcherMacroExpander() parser.MacroExpander {
	return func(eh parser.ExprHelper, target ast.Expr, args []ast.Expr) (ast.Expr, *common.Error) {
		if len(args) == 0 {
			return eh.NewCall("file",
				eh.NewIdent(caddyhttp.CELRequestVarName),
				eh.NewMap(),
			), nil
		}
		if len(args) == 1 {
			arg := args[0]
			if isCELStringLiteral(arg) || isCELCaddyPlaceholderCall(arg) {
				return eh.NewCall("file",
					eh.NewIdent(caddyhttp.CELRequestVarName),
					eh.NewMap(eh.NewMapEntry(
						eh.NewLiteral(types.String("try_files")),
						eh.NewList(arg),
						false,
					)),
				), nil
			}
			if isCELTryFilesLiteral(arg) {
				return eh.NewCall("file", eh.NewIdent(caddyhttp.CELRequestVarName), arg), nil
			}
			return nil, &common.Error{
				Location: eh.OffsetLocation(arg.ID()),
				Message:  "matcher requires either a map or string literal argument",
			}
		}

		for _, arg := range args {
			if !isCELStringLiteral(arg) && !isCELCaddyPlaceholderCall(arg) {
				return nil, &common.Error{
					Location: eh.OffsetLocation(arg.ID()),
					Message:  "matcher only supports repeated string literal arguments",
				}
			}
		}
		return eh.NewCall("file",
			eh.NewIdent(caddyhttp.CELRequestVarName),
			eh.NewMap(eh.NewMapEntry(
				eh.NewLiteral(types.String("try_files")),
				eh.NewList(args...),
				false,
			)),
		), nil
	}
}

// Provision sets up m's defaults.
func (m *MatchFile) Provision(ctx caddy.Context) error {