Handle -q option

Author: pkch

mypy/waiter.py

@@ -9,7 +9,7 @@
 from multiprocessing import cpu_count
 import pipes
 import re
-from subprocess import Popen, STDOUT
+from subprocess import Popen, STDOUT, DEVNULL
 import sys
 import tempfile
 import time
@@ -25,20 +25,25 @@ class LazySubprocess:
     """Wrapper around a subprocess that runs a test task."""
 
     def __init__(self, name: str, args: List[str], *, cwd: str = None,
-                 env: Dict[str, str] = None, passthrough: bool = False) -> None:
+                 env: Dict[str, str] = None, passthrough: Optional[int] = None) -> None:
         self.name = name
         self.args = args
         self.cwd = cwd
         self.env = env
         self.start_time = None  # type: float
         self.end_time = None  # type: float
+        # None means no passthrough
+        # otherwise, it represents verbosity level
         self.passthrough = passthrough
 
     def start(self) -> None:
-        if self.passthrough:
-            self.outfile = None
-        else:
+        if self.passthrough is None:
             self.outfile = tempfile.TemporaryFile()
+        else:
+            if self.passthrough >= 0:
+                self.outfile = None
+            else:
+                self.outfile = DEVNULL
         self.start_time = time.perf_counter()
         self.process = Popen(self.args, cwd=self.cwd, env=self.env,
                              stdout=self.outfile, stderr=STDOUT)
@@ -51,7 +56,7 @@ def status(self) -> Optional[int]:
         return self.process.returncode
 
     def read_output(self) -> str:
-        if self.passthrough:
+        if self.passthrough is not None:
             return ''
         file = self.outfile
         file.seek(0)

runtests.py

@@ -111,7 +111,7 @@ def add_pytest(self, name: str, pytest_args: List[str], coverage: bool = False)
         else:
             args = [sys.executable, '-m', 'pytest'] + pytest_args
 
-        self.waiter.add(LazySubprocess(full_name, args, env=self.env, passthrough=True),
+        self.waiter.add(LazySubprocess(full_name, args, env=self.env, passthrough=self.verbosity),
                         sequential=True)
 
     def add_python(self, name: str, *args: str, cwd: Optional[str] = None) -> None: