Add option to launch processes with HIGH priority

scripts/wk/exe.py

@@ -75,7 +75,8 @@ class NonBlockingStreamReader():
 
 
 # Functions
-def build_cmd_kwargs(cmd, minimized=False, pipe=True, shell=False, **kwargs):
+def build_cmd_kwargs(
+    cmd, minimized=False, pipe=True, priority=False, shell=False, **kwargs):
   """Build kwargs for use by subprocess functions, returns dict.
 
   Specifically subprocess.run() and subprocess.Popen().
@@ -112,6 +113,9 @@ def build_cmd_kwargs(cmd, minimized=False, pipe=True, shell=False, **kwargs):
     startupinfo.wShowWindow = 6
     cmd_kwargs['startupinfo'] = startupinfo
 
+  # High priority
+  if priority:
+    cmd_kwargs['creationflags'] = subprocess.HIGH_PRIORITY_CLASS
 
   # Pipe output
   if pipe:
@@ -236,6 +240,18 @@ def run_program(cmd, check=True, pipe=True, shell=False, **kwargs):
   return proc
 
 
+def set_proc_priority(name, priority, exact=True):
+  """Set process priority by name.
+
+  NOTE: priority currently can be only set to NORMAL or HIGH.
+  """
+  if priority not in ('NORMAL', 'HIGH'):
+    raise RuntimeError('Invalid process priority specified.')
+
+  for proc in get_procs(name, exact=exact):
+    proc.nice(psutil.HIGH_PRIORITY_CLASS)
+
+
 def start_thread(function, args=None, daemon=True):
   """Run function as thread in background, returns Thread object."""
   LOG.debug(