├── .gitignore
├── Dockerfile
├── README.md
├── hooks
    └── build
└── loader


/.gitignore:
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1 | *.swp
2 | 


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/Dockerfile:
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 1 | FROM golang:1.10-alpine
 2 | 
 3 | ARG BUILD_DATE
 4 | ARG VCS_REF
 5 | 
 6 | LABEL org.label-schema.build-date=$BUILD_DATE \
 7 |       org.label-schema.vcs-url="https://github.com/brimstone/docker-golang-musl" \
 8 |       org.label-schema.vcs-ref=$VCS_REF \
 9 |       org.label-schema.schema-version="1.0.0-rc1"
10 | 
11 | ENV TAR="" \
12 |     VERBOSE="" \
13 |     LDFLAGS=""
14 | 
15 | RUN apk -U add gcc make git musl-dev jq-dev
16 | 
17 | COPY loader /loader
18 | 
19 | WORKDIR /go/src/app
20 | 
21 | ENTRYPOINT [ "/loader" ]
22 | 
23 | ONBUILD ARG PACKAGE
24 | 
25 | ONBUILD COPY . /go/src/${PACKAGE}/
26 | 
27 | ONBUILD WORKDIR /go/src/${PACKAGE}/
28 | 
29 | ONBUILD RUN /loader -o /app
30 | 


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/README.md:
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 1 | golang-musl
 2 | ===========
 3 | 
 4 | This is a container to build golang static binaries with musl instead of glibc.
 5 | 
 6 | [![](https://images.microbadger.com/badges/image/brimstone/golang-musl.svg)](https://microbadger.com/images/brimstone/golang-musl "Get your own image badge on microbadger.com")
 7 | 
 8 | 
 9 | Usage
10 | -----
11 | 
12 | Check out your source files to a GOPATH compatible directory:
13 | 
14 | ```bash
15 | mkdir -p src/github.com/user
16 | git clone https://github.com/user/repo.git src/github.com/user/repo
17 | ```
18 | 
19 | Then build!
20 | 
21 | ```bash
22 | docker run --rm -it -v "$PWD:/go" -u "$UID:$GID" brimstone/golang-musl github.com/user/repo
23 | ```
24 | 
25 | Alternate build
26 | ---------------
27 | 
28 | For when another repo is included in a `src` directory, for instance, a submodule:
29 | ```bash
30 | tar c src \
31 | | docker run --rm -i -e TAR=1 brimstone/golang-musl github.com/user/repo \
32 | | tar -x ./main
33 | ```
34 | 
35 | For when there's just source files in a diretory:
36 | ```bash
37 | tar c . \
38 | | docker run --rm -i -e TAR=1 brimstone/golang-musl -o main \
39 | | tar -x ./main
40 | 
41 | 
42 | Environment Variables
43 | ---------------------
44 | 
45 | `VERBOSE` This makes the loader script more verbose
46 | 
47 | ONBUILD
48 | -------
49 | 
50 | This image supports docker multistage builds. Simply use this as template for your Dockerfile:
51 | ```
52 | FROM brimstone/golang-musl as builder
53 | 
54 | FROM scratch
55 | ENV ADDRESS=
56 | EXPOSE 80
57 | ENTRYPOINT ["/repo", "serve"]
58 | COPY --from=builder /app /repo
59 | ```
60 | 
61 | Then build with this:
62 | ```
63 | docker build -t user/repo --build-arg PACKAGE=github.com/user/repo .
64 | ```
65 | 
66 | References
67 | ----------
68 | 
69 | http://dominik.honnef.co/posts/2015/06/statically_compiled_go_programs__always__even_with_cgo__using_musl/
70 | 
71 | 


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/hooks/build:
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1 | #!/bin/bash
2 | 
3 | # stolen from https://medium.com/microscaling-systems/labelling-automated-builds-on-docker-hub-f3d073fb8e1
4 | docker build --build-arg VCS_REF="$(git rev-parse --short HEAD)" \
5 |              --build-arg BUILD_DATE="$(date -u +"%Y-%m-%dT%H:%M:%SZ")" \
6 |              -t "$IMAGE_NAME" .
7 | 


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/loader:
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 1 | #!/bin/sh
 2 | 
 3 | set -ue
 4 | 
 5 | LDFLAGS="${LDFLAGS:-}"
 6 | [ -n "$VERBOSE" ] && set -x
 7 | 
 8 | if [ "$#" = 0 ]; then
 9 | 	echo "Assuming the working directory contains source files." >&2
10 | fi
11 | 
12 | if [ -n "$TAR" ]; then
13 | 	tar -x >&2
14 | 	(
15 | 	[ -n "${1:-}" ] && [ -d "src/$1" ] && cd "src/$1"
16 | 	/usr/local/go/bin/go get -v -d >&2
17 | 	)
18 | fi
19 | 
20 | /usr/local/go/bin/go build -a -ldflags "-linkmode external -extldflags \"-static\" -s -w $LDFLAGS" "$@" >&2
21 | 
22 | if [ -n "$TAR" ]; then
23 | 	tar -c .
24 | fi
25 | 


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