FROM golang:1.15-alpine

# gcc is required to support cgo;
# git and mercurial are needed most times for go get`, etc.
# See https://github.com/docker-library/golang/issues/80
RUN apk --no-cache add gcc musl-dev git mercurial

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