rework for gopath and bootstrapping

var/spack/repos/builtin/packages/go-bootstrap/package.py

@@ -0,0 +1,51 @@
+import os
+import shutil
+import glob
+from spack import *
+
+# THIS PACKAGE SHOULD NOT EXIST
+# it exists to make up for the inability to:
+# * use an external go compiler
+# * have go depend on itself
+# * have a sensible way to find gccgo without a dep on gcc
+
+class GoBootstrap(Package):
+    """Old C-bootstrapped go to bootstrap real go"""
+    homepage = "https://golang.org"
+    url = "https://go.googlesource.com/go"
+
+    extendable = True
+
+    # temporary fix until tags are pulled correctly
+    version('1.4.2', git='https://go.googlesource.com/go', tag='go1.4.2')
+
+    variant('test',
+            default=True,
+            description="Run tests as part of build, a good idea but quite"
+            " time consuming")
+
+    provides('golang@:1.4.2')
+
+    depends_on('git')
+
+    def install(self, spec, prefix):
+        bash = which('bash')
+        with working_dir('src'):
+            if '+test' in spec:
+                bash('all.bash')
+            else:
+                bash('make.bash')
+
+        try:
+            os.makedirs(prefix)
+        except OSError:
+            pass
+        for f in glob.glob('*'):
+            if os.path.isdir(f):
+                shutil.copytree(f, os.path.join(prefix, f))
+            else:
+                shutil.copy2(f, os.path.join(prefix, f))
+
+    def setup_environment(self, spack_env, run_env):
+        spack_env.set('GOROOT_FINAL', self.spec.prefix)
+