spack graph: env aware (#42093)

lib/spack/spack/cmd/graph.py

@@ -18,7 +18,14 @@
 
 def setup_parser(subparser):
     setup_parser.parser = subparser
+    subparser.epilog = """
+Outside of an environment, the command concretizes specs and graphs them, unless the
+--installed option is given. In that case specs are matched from the current DB.
 
+If an environment is active, specs are matched from the currently available concrete specs
+in the lockfile.
+
+"""
     method = subparser.add_mutually_exclusive_group()
     method.add_argument(
         "-a", "--ascii", action="store_true", help="draw graph as ascii to stdout (default)"
@@ -41,39 +48,40 @@ def setup_parser(subparser):
     )
 
     subparser.add_argument(
-        "-i",
-        "--installed",
-        action="store_true",
-        help="graph installed specs, or specs in the active env (implies --dot)",
+        "-i", "--installed", action="store_true", help="graph specs from the DB"
     )
 
     arguments.add_common_arguments(subparser, ["deptype", "specs"])
 
 
 def graph(parser, args):
-    if args.installed and args.specs:
-        tty.die("cannot specify specs with --installed")
+    env = ev.active_environment()
+    if args.installed and env:
+        tty.die("cannot use --installed with an active environment")
 
     if args.color and not args.dot:
         tty.die("the --color option can be used only with --dot")
 
     if args.installed:
-        args.dot = True
-        env = ev.active_environment()
-        if env:
-            specs = env.concrete_roots()
-        else:
+        if not args.specs:
             specs = spack.store.STORE.db.query()
+        else:
+            result = []
+            for item in args.specs:
+                result.extend(spack.store.STORE.db.query(item))
+            specs = list(set(result))
+    elif env:
+        specs = env.concrete_roots()
+        if args.specs:
+            specs = env.all_matching_specs(*args.specs)
 
     else:
         specs = spack.cmd.parse_specs(args.specs, concretize=not args.static)
 
     if not specs:
-        setup_parser.parser.print_help()
-        return 1
+        tty.die("no spec matching the query")
 
     if args.static:
-        args.dot = True
         static_graph_dot(specs, depflag=args.deptype)
         return