Add support for Go develop containers

README.md

@@ -92,8 +92,9 @@ be retrieved and installed.
 
 Additionally, a few wildcard release strings are also supported:
 
-  - `latest` will use the latest Go release
   - `1.5.x` will use the latest point release of a specific Go version
+  - `latest` will use the latest Go release (this is the default)
+  - `develop` will use the master branch of the Go repository
 
 ### Output prefixing
 

docker/base/Dockerfile

@@ -68,11 +68,16 @@ ADD bootstrap.sh /bootstrap.sh
 ENV BOOTSTRAP /bootstrap.sh
 RUN chmod +x $BOOTSTRAP
 
-# Inject the new Go root distribution downloader and secondary bootstrapper
+# Inject the new Go root distribution downloader and bootstrapper
 ADD bootstrap_pure.sh /bootstrap_pure.sh
 ENV BOOTSTRAP_PURE /bootstrap_pure.sh
 RUN chmod +x $BOOTSTRAP_PURE
 
+# Inject the Go source distribution downloader and bootstrapper
+ADD bootstrap_repo.sh /bootstrap_repo.sh
+ENV BOOTSTRAP_REPO /bootstrap_repo.sh
+RUN chmod +x $BOOTSTRAP_REPO
+
 # Inject the C dependency cross compiler
 ADD build_deps.sh /build_deps.sh
 ENV BUILD_DEPS /build_deps.sh

docker/base/bootstrap_pure.sh

@@ -4,21 +4,26 @@
 # not only a few pre-built Go cross compilers, but rather bootstraps all of the
 # supported platforms from the origin Linux amd64 distribution.
 #
-# Usage: bootstrap.sh
+# Usage: bootstrap_pure.sh
 #
-# Needed environment variables:
+# Environment variables for remote bootstrapping:
 #   FETCH          - Remote file fetcher and checksum verifier (injected by image)
 #   ROOT_DIST      - 64 bit Linux Go binary distribution package
 #   ROOT_DIST_SHA1 - 64 bit Linux Go distribution package checksum
+#
+# Environment variables for local bootstrapping:
+#   GOROOT - Path to the lready installed Go runtime
 set -e
 
-# Download, verify and install the root distribution
+# Download, verify and install the root distribution if pulled remotely
+if [ "$GOROOT" == "" ]; then
   $FETCH $ROOT_DIST $ROOT_DIST_SHA1
 
   tar -C /usr/local -xzf `basename $ROOT_DIST`
   rm -f `basename $ROOT_DIST`
 
   export GOROOT=/usr/local/go
+fi
 export GOROOT_BOOTSTRAP=$GOROOT
 
 # Pre-build all guest distributions based on the root distribution

docker/base/bootstrap_repo.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+#
+# Contains the Go tool-chain source repository bootstrapper, that builds and
+# bootstraps a Go environment from the official GitHub repository, opposed to
+# using pre-build packages.
+#
+# Usage: bootstrap_repo.sh <branch>
+#
+# Needed environment variables:
+#   FETCH - Remote file fetcher and checksum verifier (injected by image)
+set -e
+
+# Prepare the image for manual Go compilation
+apt-get install -y netbase --no-install-recommends # Needed for `net` tests
+apt-get remove -y clang                            # Broken thread sanitizer
+
+# Define the paths to deploy the bootstrapper and the final distribution
+export GOROOT=/usr/local/go
+export GOROOT_BOOTSTRAP=${GOROOT}-boot
+
+# Download and install the Go bootstrap distribution
+BOOT_DIST=https://storage.googleapis.com/golang/go1.4.3.linux-amd64.tar.gz
+BOOT_DIST_SHA1=332b64236d30a8805fc8dd8b3a269915b4c507fe
+
+$FETCH $BOOT_DIST $BOOT_DIST_SHA1
+
+tar -C /usr/local -xzf `basename $BOOT_DIST`
+rm -f `basename $BOOT_DIST`
+mv $GOROOT $GOROOT_BOOTSTRAP
+
+# Download, build and install the requesed Go sources
+(cd /usr/local && git clone https://go.googlesource.com/go)
+(cd $GOROOT && git checkout $1)
+(cd $GOROOT/src && ./all.bash)
+
+rm -rf $GOROOT_BOOTSTRAP        && \
+export GOROOT_BOOTSTRAP=$GOROOT && \
+
+# Restore the original image and bootstrap Go
+apt-get install -y clang --no-install-recommends
+apt-get remove -y netbase
+
+$BOOTSTRAP_PURE

docker/go-develop/Dockerfile

@@ -0,0 +1,12 @@
+# Go cross compiler (xgo): Go develop layer
+# Copyright (c) 2015 Péter Szilágyi. All rights reserved.
+#
+# Released under the MIT license.
+
+FROM karalabe/xgo-base
+
+MAINTAINER Péter Szilágyi <peterke@gmail.com>
+
+# Clone and bootstrap the latest Go develop branch
+RUN $BOOTSTRAP_REPO master
+ENV GO_VERSION 999