From 5a2fd5039fbba3c06b640be91a2c436bc23f74e8 Mon Sep 17 00:00:00 2001
From: Oleg Stepura <github@oleg.stepura.com>
Date: Tue, 26 Sep 2017 21:57:02 +0200
Subject: [PATCH] Dockerfile broken with old alpine version with old go (#409)

* Dockerfile broken with old alpine version with old go

3.4 no longer works with error
```
package context: unrecognized import path "context" (import path does not begin with hostname)
```

3.5 with no changes did not work with error
```
# runtime/cgo
/tmp/go-build671992352/runtime/cgo/_obj/_cgo_export.c:2:20: fatal error: stdlib.h: No such file or directory
 #include <stdlib.h>
                    ^
compilation terminated.
```

3.6 with no changes did not work with error:
```
# github.com/xenolf/lego
/usr/lib/go/pkg/tool/linux_amd64/link: running gcc failed: exit status 1
/usr/lib/gcc/x86_64-alpine-linux-musl/6.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: cannot find Scrt1.o: No such file or directory
/usr/lib/gcc/x86_64-alpine-linux-musl/6.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: cannot find crti.o: No such file or directory
/usr/lib/gcc/x86_64-alpine-linux-musl/6.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: cannot find -lpthread
/usr/lib/gcc/x86_64-alpine-linux-musl/6.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: cannot find -lssp_nonshared
collect2: error: ld returned 1 exit status
```

* Fix git tag to freeze successfully builded image.

Fix git tag to freeze successfully builded image (prevents issues with newer versions in the future, plus uses stable release)

* Update Dockerfile according to PR comments

* Forgot /go in rm

* Bump lego version
---
 Dockerfile | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index c0396407..511e403c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,14 +1,15 @@
-FROM alpine:3.4
+FROM alpine:3.6
 
 ENV GOPATH /go
+ENV LEGO_VERSION tags/v0.4.1
 
-RUN apk update && apk add ca-certificates go git && \
-    rm -rf /var/cache/apk/* && \
+RUN apk update && apk add --no-cache --virtual run-dependencies ca-certificates && \
+    apk add --no-cache --virtual build-dependencies go git musl-dev && \
     go get -u github.com/xenolf/lego && \
-    cd /go/src/github.com/xenolf/lego && \
+    cd ${GOPATH}/src/github.com/xenolf/lego && \
+    git checkout ${LEGO_VERSION} && \
     go build -o /usr/bin/lego . && \
-    apk del go git && \
-    rm -rf /var/cache/apk/* && \
-    rm -rf /go
+    apk del build-dependencies && \
+    rm -rf ${GOPATH}
 
 ENTRYPOINT [ "/usr/bin/lego" ]