add quotes to type annotation

Signed-off-by: Todd Gamblin <tgamblin@llnl.gov>

lib/spack/spack/installer.py

@@ -75,6 +75,7 @@
 
 _fail_fast_err = "Terminating after first install failure"
 
+
 class BuildStatus(enum.Enum):
     """Different build (task) states."""
 
@@ -123,6 +124,7 @@ class ExecuteResult(enum.Enum):
     # task is not ready for installation (locked by another process)
     NO_OP = enum.auto()
 
+
 class InstallAction(enum.Enum):
     #: Don't perform an install
     NONE = enum.auto()
@@ -1067,7 +1069,6 @@ def flag_installed(self, installed: List[str]) -> None:
                 level=2,
             )
 
-
     def _setup_install_dir(self, pkg: "spack.package_base.PackageBase") -> None:
         """
         Create and ensure proper access controls for the install directory.
@@ -1182,9 +1183,8 @@ def priority(self):
         """The priority is based on the remaining uninstalled dependencies."""
         return len(self.uninstalled_deps)
 
-def check_db(
-    spec: "spack.spec.Spec"
-    ) -> Tuple[Optional[spack.database.InstallRecord], bool]:
+
+def check_db(spec: "spack.spec.Spec") -> Tuple[Optional[spack.database.InstallRecord], bool]:
     """Determine if the spec is flagged as installed in the database
 
     Args:
@@ -1204,10 +1204,11 @@ def check_db(
         installed_in_db = False
     return rec, installed_in_db
 
+
 class BuildTask(Task):
     """Class for representing a build task for a package."""
 
-    process_handle: spack.build_environment.ProcessHandle = None
+    process_handle: "spack.build_environment.ProcessHandle" = None
     started: bool = False
     no_op: bool = False
 
@@ -1262,7 +1263,9 @@ def start(self):
     def poll(self):
         """Check if task has successfully executed, caused an InstallError,
         or the child process has information ready to receive."""
-        assert self.started or self.no_op, "Can't call `poll()` before `start()` or identified no-operation task"
+        assert (
+            self.started or self.no_op
+        ), "Can't call `poll()` before `start()` or identified no-operation task"
         return self.no_op or self.success_result or self.error_result or self.process_handle.poll()
 
     def complete(self):
@@ -1270,7 +1273,9 @@ def complete(self):
         Complete the installation of the requested spec and/or dependency
         represented by the build task.
         """
-        assert self.started or self.no_op, "Can't call `complete()` before `start()` or identified no-operation task"
+        assert (
+            self.started or self.no_op
+        ), "Can't call `complete()` before `start()` or identified no-operation task"
         # seeing if I can get rid of that assertion because in some cases we will need to
         # complete the task so that we can raise the errors even though a process was never
         # started because saving the error made it exit the function before a process could be started
@@ -1518,7 +1523,6 @@ def _add_init_task(
 
         self._push_task(task)
 
-
     def _check_deps_status(self, request: BuildRequest) -> None:
         """Check the install status of the requested package
 
@@ -2116,8 +2120,9 @@ def _init_queue(self) -> None:
                     task.add_dependent(dependent_id)
         self.all_dependencies = all_dependencies
 
-
-    def start_task(self, task: Task, install_status: InstallStatus, term_status: TermStatusLine) -> None:
+    def start_task(
+        self, task: Task, install_status: InstallStatus, term_status: TermStatusLine
+    ) -> None:
         """Attempts to start a package installation."""
         pkg, pkg_id, spec = task.pkg, task.pkg_id, task.pkg.spec
         install_status.next_pkg(pkg)
@@ -2281,14 +2286,11 @@ def complete_task(self, task: Task, install_status: InstallStatus) -> Optional[T
                 # lower levels -- skip printing if already printed.
                 # TODO: sort out this and SpackError.print_context()
                 tty.error(
-                    f"Failed to install {pkg.name} due to "
-                    f"{exc.__class__.__name__}: {str(exc)}"
+                    f"Failed to install {pkg.name} due to " f"{exc.__class__.__name__}: {str(exc)}"
                 )
             # Terminate if requested to do so on the first failure.
             if self.fail_fast:
-                raise spack.error.InstallError(
-                    f"{_fail_fast_err}: {str(exc)}", pkg=pkg
-                ) from exc
+                raise spack.error.InstallError(f"{_fail_fast_err}: {str(exc)}", pkg=pkg) from exc
 
             # Terminate when a single build request has failed, or summarize errors later.
             if task.is_build_request:
@@ -2357,7 +2359,6 @@ def install(self) -> None:
                 finally:
                     active_tasks.remove(task)
 
-
         self._clear_removed_tasks()
         if self.build_pq:
             task = self._pop_task()
@@ -2640,6 +2641,7 @@ def build_process(pkg: "spack.package_base.PackageBase", install_args: dict) ->
     with spack.util.path.filter_padding():
         return installer.run()
 
+
 def overwrite_process(pkg: "spack.package_base.PackageBase", install_args: dict) -> bool:
     # TODO:I don't know if this comment accurately reflects what's going on anymore
     # TODO: think it should move to the error handling
@@ -2650,6 +2652,7 @@ def overwrite_process(pkg: "spack.package_base.PackageBase", install_args: dict)
     with fs.replace_directory_transaction(pkg.prefix):
         return build_process(pkg, install_args)
 
+
 def deprecate(spec: "spack.spec.Spec", deprecator: "spack.spec.Spec", link_fn) -> None:
     """Deprecate this package in favor of deprecator spec"""
     # Here we assume we don't deprecate across different stores, and that same hash