$ golangci-lint run --color=always ./... --timeout=10m
WARN [lintersdb] The name "vet" is deprecated. The linter has been renamed to: govet. 
modules/gitter/widget.go:71:5: S1009: should omit nil check; len() for nil slices is defined as zero (gosimple)
        if widget.messages == nil || len(widget.messages) == 0 {
           ^