dashboard/env: add nacl-386 and nacl-amd64p32 builders

LGTM=adg
R=adg, dave
CC=golang-codereviews
https://golang.org/cl/136830043

dashboard/env/linux-x86-nacl/Dockerfile

@@ -0,0 +1,57 @@
+# Copyright 2014 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# gobuilders/linux-x86-nacl for 32- and 64-bit nacl.
+#
+# We need more modern libc than Debian stable as used in base, so we're
+# using Ubuntu LTS here.
+#
+# TODO(bradfitz): make both be Ubuntu? But we also want Debian, Fedora, 
+# etc coverage., so deal with unifying these later, once there's a plan
+# or a generator for them and the other builders are turned down.
+
+FROM ubuntu:trusty
+MAINTAINER golang-dev <golang-dev@googlegroups.com>
+
+ENV DEBIAN_FRONTEND noninteractive
+RUN apt-get update && apt-get upgrade -y
+
+# For running curl to get the hg starter tarballs (faster than hg clone).
+RUN apt-get install -y --no-install-recommends curl ca-certificates
+
+# For building Go's bootstrap 'dist' program:
+RUN apt-get install -y --no-install-recommends gcc libc6-dev
+
+# For interacting with the Go source & subrepos:
+RUN apt-get install -y --no-install-recommends mercurial git-core subversion
+
+# For 32-bit nacl:
+RUN apt-get install -y --no-install-recommends libc6-i386 libc6-dev-i386 lib32stdc++6 gcc-multilib
+
+ENV GOPATH /gopath
+ENV GOROOT /goroot
+
+RUN mkdir -p $GOROOT
+RUN cd $GOROOT && curl -s https://storage.googleapis.com/gobuilder/go-snap.tar.gz | tar x --no-same-owner -zv
+
+ENV GO_TOOLS $GOPATH/src/code.google.com/p/go.tools
+RUN mkdir -p $GO_TOOLS
+RUN cd $GO_TOOLS $ && curl -s https://storage.googleapis.com/gobuilder/go.tools-snap.tar.gz | tar x --no-same-owner -zv
+
+RUN cd $GOROOT && hg update -C b8ff0ec2a724
+RUN cd $GOROOT/src && ./make.bash
+RUN mkdir -p /usr/local/bin
+
+RUN cd $GO_TOOLS && hg update -C 881a2f3130de
+ENV GOBIN /usr/local/bin
+RUN /goroot/bin/go install code.google.com/p/go.tools/dashboard/builder
+
+RUN cd /usr/local/bin && curl -s -O https://storage.googleapis.com/gobuilder/sel_ldr_x86_32 && chmod +x sel_ldr_x86_32
+RUN cd /usr/local/bin && curl -s -O https://storage.googleapis.com/gobuilder/sel_ldr_x86_64 && chmod +x sel_ldr_x86_64
+
+RUN ln -s $GOROOT/misc/nacl/go_nacl_386_exec /usr/local/bin/
+RUN ln -s $GOROOT/misc/nacl/go_nacl_amd64p32_exec /usr/local/bin/
+ADD build-command.pl /usr/local/bin/
+
+ENV PATH /usr/local/bin:$GOROOT/bin:$PATH

dashboard/env/linux-x86-nacl/Makefile

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+# Copyright 2014 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+docker: Dockerfile
+	docker build -t gobuilders/linux-x86-nacl .
+
+push: docker
+	docker push gobuilders/linux-x86-nacl
+

dashboard/env/linux-x86-nacl/README

@@ -0,0 +1,6 @@
+$ export BUILD=nacl-amd64p32-temp
+$ export BUILDREV=59b1bb4bf045 
+$ docker run \
+     -v $HOME/keys/$BUILD.buildkey:/.gobuildkey \
+     gobuilders/linux-x86-nacl \
+     /usr/local/bin/builder -rev=$BUILDREV -buildroot=/ -v -cmd=/usr/local/bin/build-command.pl $BUILD

dashboard/env/linux-x86-nacl/build-command.pl

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+#!/usr/bin/perl
+
+use strict;
+
+if ($ENV{GOOS} eq "nacl") {
+    delete $ENV{GOROOT_FINAL};
+    exec("./nacltest.bash", @ARGV);
+    die "Failed to run nacltest.bash: $!\n";
+}
+
+exec("./all.bash", @ARGV);
+die "Failed to run all.bash: $!\n";
+