shithub: hugo

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Support Docker args TAGS, WORKDIR, CGO; speed up repetitive builds

--- a/.dockerignore

+++ b/.dockerignore

@@ -6,3 +6,4 @@

 .circleci

 docs

 examples

+Dockerfile

--- a/Dockerfile

+++ b/Dockerfile

@@ -2,25 +2,31 @@

 # Twitter:      https://twitter.com/gohugoio

 # Website:      https://gohugo.io/

-FROM golang:1.11-alpine3.7 AS build

+FROM golang:1.11-stretch AS build

-ENV CGO_ENABLED=0

-ENV GOOS=linux

-ENV GO111MODULE=on

 WORKDIR /go/src/github.com/gohugoio/hugo

-RUN apk add --no-cache \

-    git \

-    musl-dev

+RUN apt-get install \

+    git gcc g++ binutils

 COPY . /go/src/github.com/gohugoio/hugo/

-RUN go install -ldflags '-s -w'

+ENV GO111MODULE=on

+RUN go get -d .

+ARG CGO=0

+ENV CGO_ENABLED=${CGO}

+ENV GOOS=linux

+

+# default non-existent build tag so -tags always has an arg

+ARG BUILD_TAGS="99notag"

+RUN go install -ldflags '-w -extldflags "-static"' -tags ${BUILD_TAGS}

+

 # ---

 FROM scratch

 COPY --from=build /go/bin/hugo /hugo

-WORKDIR /site

-VOLUME  /site

+ARG  WORKDIR="/site"

+WORKDIR ${WORKDIR}

+VOLUME  ${WORKDIR}

 EXPOSE  1313

 ENTRYPOINT [ "/hugo" ]

 CMD [ "--help" ]