FROM golang:1.13-alpine

# required to support cgo
RUN apk --no-cache add gcc musl-dev

# needed most times for `go get`, etc. See https://github.com/docker-library/golang/issues/80
RUN apk add --no-cache git mercurial

# don't place it into $GOPATH/bin because Drone mounts $GOPATH as volume
COPY golangci-lint /usr/bin/
CMD ["golangci-lint"]