Update `spack setup` and `spack graph` to be consistent with recent refactoring (#2317)

* Update `spack setup` and `spack graph` to be consistent with c557e765 and 9347f869.  Fixes #2316.

* Added another "fix" necessary to make `spack setup` work.

* Added another "fix" necessary to make `spack setup` work. (reverted from commit 7f0d3ecb38c97ec00491d7cd66b4266e3018b1ca)

lib/spack/spack/cmd/graph.py

@@ -28,6 +28,7 @@
 
 import spack
 import spack.cmd
+import spack.store
 from spack.spec import *
 from spack.graph import *
 
@@ -73,7 +74,7 @@ def graph(parser, args):
         if args.specs:
             tty.die("Can't specify specs with --installed")
         args.dot = True
-        specs = spack.installed_db.query()
+        specs = spack.store.db.query()
 
     else:
         specs = spack.cmd.parse_specs(

lib/spack/spack/cmd/setup.py

@@ -30,6 +30,7 @@
 
 import llnl.util.tty as tty
 import spack
+import spack.store
 import spack.cmd
 import spack.cmd.install as install
 import spack.cmd.common.arguments as arguments
@@ -130,7 +131,7 @@ def setup(self, args):
         tty.die("spack setup only takes one spec.")
 
     # Take a write lock before checking for existence.
-    with spack.installed_db.write_transaction():
+    with spack.store.db.write_transaction():
         spec = specs[0]
         if not spack.repo.exists(spec.name):
             tty.warn("No such package: %s" % spec.name)