hashes: revert spack monitor hash changes to preserve original protocol

`spack monitor` expects a field called `spec_full_hash`, so we shouldn't change that.
Instead, we can pass a `dag_hash` (which is now the full hash) but not change the field
name.

lib/spack/spack/environment/environment.py

@@ -1269,7 +1269,7 @@ def _concretize_separately(self, tests=False):
         by_hash = {}
         for abstract, concrete in zip(root_specs, concretized_root_specs):
             self._add_concrete_spec(abstract, concrete)
-            by_hash[concrete.build_hash()] = concrete
+            by_hash[concrete.dag_hash()] = concrete
 
         # Unify the specs objects, so we get correct references to all parents
         self._read_lockfile_dict(self._to_lockfile_dict())

lib/spack/spack/monitor.py

@@ -132,7 +132,7 @@ def __init__(self, host=None, prefix="ms1", allow_fail=False, tags=None,
         self.tags = tags
         self.save_local = save_local
 
-        # We keey lookup of build_id by dag_hash
+        # We key lookup of build_id by dag_hash
         self.build_ids = {}
         self.setup_save()
 
@@ -412,7 +412,9 @@ def new_configuration(self, specs):
                 spec.concretize()
 
             # Remove extra level of nesting
-            as_dict = {"spec": spec.to_dict(hash=ht.dag_hash)['spec'],
+            # This is the only place in Spack we still use full_hash, as `spack monitor`
+            # requires specs with full_hash-keyed dependencies.
+            as_dict = {"spec": spec.to_dict(hash=ht.full_hash)['spec'],
                        "spack_version": self.spack_version}
 
             if self.save_local:
@@ -437,8 +439,7 @@ def failed_concretization(self, specs):
             meta = spec.to_dict()['spec']
             nodes = []
             for node in meta.get("nodes", []):
-                for hashtype in ["hash", "runtime_hash"]:
+                node["full_hash"] = "FAILED_CONCRETIZATION"
-                    node[hashtype] = "FAILED_CONCRETIZATION"
                 nodes.append(node)
             meta['nodes'] = nodes
 
@@ -476,7 +477,7 @@ def get_build_id(self, spec, return_response=False, spec_exists=True):
 
         # Prepare build environment data (including spack version)
         data = self.build_environment.copy()
-        data['hash'] = dag_hash
+        data['full_hash'] = dag_hash
 
         # If the build should be tagged, add it
         if self.tags:

lib/spack/spack/spec.py

@@ -2056,14 +2056,15 @@ def node_dict_with_hashes(self, hash=ht.dag_hash):
         # to be included. This is effectively the last chance we get to compute
         # it accurately.
         if self.concrete:
+            # all specs have at least a DAG hash
             node[ht.dag_hash.name] = self.dag_hash()
+
         else:
             node['concrete'] = False
 
-        if hash.name == 'process_hash':
+        # we can also give them other hash types if we want
-            node[hash.name] = self.process_hash()
+        if hash.name != ht.dag_hash.name:
-        elif hash.name == 'runtime_hash':
+            node[hash.name] = self._cached_hash(hash)
-            node[hash.name] = self.runtime_hash()
 
         return node
 

lib/spack/spack/test/monitor.py

@@ -48,8 +48,10 @@ def mock_monitor_request(monkeypatch):
     """
     def mock_do_request(self, endpoint, *args, **kwargs):
 
+        # monitor was originally keyed by full_hash, but now dag_hash is the full hash.
+        # the name of the field in monitor is still spec_full_hash, for now.
         build = {"build_id": 1,
-                 "spec_hash": "bpfvysmqndtmods4rmy6d6cfquwblngp",
+                 "spec_full_hash": "bpfvysmqndtmods4rmy6d6cfquwblngp",
                  "spec_name": "dttop"}
 
         # Service Info
@@ -111,7 +113,7 @@ def mock_do_request(self, endpoint, *args, **kwargs):
         elif endpoint == "specs/new/":
             return {"message": "success",
                     "data": {
-                        "hash": "bpfvysmqndtmods4rmy6d6cfquwblngp",
+                        "full_hash": "bpfvysmqndtmods4rmy6d6cfquwblngp",
                         "name": "dttop",
                         "version": "1.0",
                         "spack_version": "0.16.0-1379-7a5351d495",
@@ -264,12 +266,11 @@ def test_install_monitor_save_local(install_mockery_mutable_config,
     # Get the spec name
     spec = spack.spec.Spec("dttop")
     spec.concretize()
-    dag_hash = spec.dag_hash()
 
     # Ensure we have monitor results saved
     for dirname in os.listdir(str(reports_dir)):
         dated_dir = os.path.join(str(reports_dir), dirname)
-        build_metadata = "build-metadata-%s.json" % dag_hash
+        build_metadata = "build-metadata-%s.json" % spec.dag_hash()
         assert build_metadata in os.listdir(dated_dir)
         spec_file = "spec-dttop-%s-config.json" % spec.version
         assert spec_file in os.listdir(dated_dir)