Moved install-spack to its own simpler command.

lib/spack/spack/cmd/__init__.py

@@ -25,6 +25,10 @@ def null_op(*args):
     pass
 
 
+def get_cmd_function_name(name):
+    return name.replace("-", "_")
+
+
 def get_module(name):
     """Imports the module for a particular command name and returns it."""
     module_name = "%s.%s" % (__name__, name)
@@ -35,13 +39,14 @@ def get_module(name):
     attr.setdefault(module, SETUP_PARSER, null_op)
     attr.setdefault(module, DESCRIPTION, "")
 
-    if not hasattr(module, name):
+    fn_name = get_cmd_function_name(name)
+    if not hasattr(module, fn_name):
         tty.die("Command module %s (%s) must define function '%s'."
-                % (module.__name__, module.__file__, name))
+                % (module.__name__, module.__file__, fn_name))
 
     return module
 
 
 def get_command(name):
     """Imports the command's function from a module and returns it."""
-    return getattr(get_module(name), name)
+    return getattr(get_module(name), get_cmd_function_name(name))

lib/spack/spack/cmd/install-spack.py

@@ -0,0 +1,45 @@
+import os
+from subprocess import check_call, check_output
+import spack
+from spack import new_path
+import spack.tty as tty
+
+description = "Create a new installation of spack in another prefix"
+
+def setup_parser(subparser):
+    subparser.add_argument('prefix', help="names of prefix where we should install spack")
+
+
+def get_origin_url():
+    git_dir = new_path(spack.prefix, '.git')
+    origin_url = check_output(
+        ['git', '--git-dir=%s' % git_dir, 'config', '--get', 'remote.origin.url'])
+    return origin_url.strip()
+
+
+def install_spack(parser, args):
+    origin_url = get_origin_url()
+    prefix = args.prefix
+
+    tty.msg("Fetching spack from origin: %s" % origin_url)
+
+    if os.path.exists(new_path(prefix, '.git')):
+        tty.die("There already seems to be a git repository in %s" % prefix)
+
+    files_in_the_way = os.listdir(prefix)
+    if files_in_the_way:
+        tty.die("There are already files there!  Delete these files before installing spack.",
+                *files_in_the_way)
+
+    tty.msg("Installing:",
+            "%s/bin/spack" % prefix,
+            "%s/lib/spack/..." % prefix)
+
+    os.chdir(prefix)
+    check_call(['git', 'init', '--shared', '-q'])
+    check_call(['git', 'remote', 'add', 'origin', origin_url])
+    check_call(['git', 'fetch', 'origin', 'master:refs/remotes/origin/master', '-n', '-q'])
+    check_call(['git', 'reset', '--hard', 'origin/master', '-q'])
+
+    tty.msg("Successfully installed spack in %s" % prefix,
+            "Run %s/bin/spack to use this installation." % prefix)