Make calls to logs.setup() explicit in each cmd.

Further reducing magic implicit behaviour to make code easier to
follow.

redo/builder.py

@@ -1,7 +1,7 @@
 import sys, os, errno, stat, signal, time
 from . import cycles, env, jobserver, logs, state, paths
 from .helpers import unlink, close_on_exec
-from .logs import debug2, err, warn, meta, check_tty
+from .logs import debug2, err, warn, meta
 
 
 def _nice(t):
@@ -52,7 +52,7 @@ def start_stdin_log_reader(status, details, pretty, color,
         os.dup2(w, 1)
         os.dup2(w, 2)
         os.close(w)
-        check_tty(sys.stderr, env.v.COLOR)
+        logs.setup(tty=sys.stderr, pretty=False, color=False)
     else:
         # child
         try:

redo/cmd_always.py

@@ -1,10 +1,12 @@
 import sys, os
-from . import env, state
+from . import env, logs, state
 
 
 def main():
     try:
         env.inherit()
+        logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
+
         me = os.path.join(env.v.STARTDIR,
                           os.path.join(env.v.PWD, env.v.TARGET))
         f = state.File(name=me)

redo/cmd_ifchange.py

@@ -1,5 +1,5 @@
 import os, sys, traceback
-from . import env, state, builder, jobserver, deps
+from . import env, builder, deps, jobserver, logs, state
 from .logs import debug2, err
 
 
@@ -24,6 +24,8 @@ def main():
             builder.start_stdin_log_reader(
                 status=True, details=True,
                 pretty=True, color=True, debug_locks=False, debug_pids=False)
+        else:
+            logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
         if env.v.TARGET and not env.v.UNLOCKED:
             me = os.path.join(env.v.STARTDIR,
                               os.path.join(env.v.PWD, env.v.TARGET))

redo/cmd_ifcreate.py

@@ -1,11 +1,13 @@
 import sys, os
-from . import env, state
+from . import env, logs, state
 from .logs import err
 
 
 def main():
     try:
         env.inherit()
+        logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
+
         me = os.path.join(env.v.STARTDIR,
                           os.path.join(env.v.PWD, env.v.TARGET))
         f = state.File(name=me)

redo/cmd_ood.py

@@ -1,6 +1,5 @@
 import sys, os
-from . import env, state, deps
-from .logs import err
+from . import deps, env, logs, state
 
 cache = {}
 
@@ -19,10 +18,11 @@ def log_override(name):
 
 def main():
     if len(sys.argv[1:]) != 0:
-        err('%s: no arguments expected.\n' % sys.argv[0])
+        sys.stderr.write('%s: no arguments expected.\n' % sys.argv[0])
         sys.exit(1)
 
     state.init([])
+    logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
     cwd = os.getcwd()
     for f in state.files():
         if f.is_target():

redo/cmd_redo.py

@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 import sys, os, traceback
-from . import env, options, state, builder, jobserver
+from . import builder, env, jobserver, logs, options, state
 from .atoi import atoi
 from .logs import warn, err
 
@@ -86,6 +86,9 @@ def main():
                 status=opt.status, details=opt.details,
                 pretty=opt.pretty, color=opt.color,
                 debug_locks=opt.debug_locks, debug_pids=opt.debug_pids)
+        else:
+            logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
+
         for t in targets:
             if os.path.exists(t):
                 f = state.File(name=t)

redo/cmd_sources.py

@@ -1,14 +1,15 @@
 import sys, os
-from . import state, env
-from .logs import err
+from . import env, logs, state
 
 
 def main():
-    state.init([])
     if len(sys.argv[1:]) != 0:
-        err('%s: no arguments expected.\n' % sys.argv[0])
+        sys.stderr.write('%s: no arguments expected.\n' % sys.argv[0])
         sys.exit(1)
 
+    state.init([])
+    logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
+
     cwd = os.getcwd()
     for f in state.files():
         if f.is_source():

redo/cmd_stamp.py

@@ -1,18 +1,21 @@
 import sys, os
-from . import env, state
-from .logs import err, debug2
+from . import env, logs, state
+from .logs import debug2
 
 
 def main():
-    env.inherit()
     if len(sys.argv) > 1:
-        err('%s: no arguments expected.\n' % sys.argv[0])
+        sys.stderr.write('%s: no arguments expected.\n' % sys.argv[0])
         sys.exit(1)
 
     if os.isatty(0):
-        err('%s: you must provide the data to stamp on stdin\n' % sys.argv[0])
+        sys.stderr.write('%s: you must provide the data to stamp on stdin\n'
+                         % sys.argv[0])
         sys.exit(1)
 
+    env.inherit()
+    logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
+
     # hashlib is only available in python 2.5 or higher, but the 'sha'
     # module produces a DeprecationWarning in python 2.6 or higher.  We want
     # to support python 2.4 and above without any stupid warnings, so let's

redo/cmd_targets.py

@@ -1,14 +1,15 @@
 import sys, os
-from . import env, state
-from .logs import err
+from . import env, logs, state
 
 
 def main():
-    state.init([])
     if len(sys.argv[1:]) != 0:
-        err('%s: no arguments expected.\n' % sys.argv[0])
+        sys.stderr.write('%s: no arguments expected.\n' % sys.argv[0])
         sys.exit(1)
 
+    state.init([])
+    logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
+
     cwd = os.getcwd()
     for f in state.files():
         if f.is_target():

redo/cmd_unlocked.py

@@ -1,14 +1,15 @@
 import sys, os
-from . import env, state
-from .logs import err
+from . import env, logs, state
 
 
 def main():
-    env.inherit()
     if len(sys.argv[1:]) < 2:
-        err('%s: at least 2 arguments expected.\n' % sys.argv[0])
+        sys.stderr.write('%s: at least 2 arguments expected.\n' % sys.argv[0])
         sys.exit(1)
 
+    env.inherit()
+    logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
+
     target = sys.argv[1]
     deps = sys.argv[2:]
 

redo/cmd_whichdo.py

@@ -1,14 +1,16 @@
 import sys, os
-from . import env, paths
+from . import env, logs, paths
 from .logs import err
 
 
 def main():
-    env.init_no_state()
     if len(sys.argv[1:]) != 1:
-        err('%s: exactly one argument expected.\n' % sys.argv[0])
+        sys.stderr.write('%s: exactly one argument expected.\n' % sys.argv[0])
         sys.exit(1)
 
+    env.init_no_state()
+    logs.setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
+
     want = sys.argv[1]
     if not want:
         err('cannot build the empty target ("").\n')

redo/logs.py

@@ -4,7 +4,7 @@ from . import env
 RED = GREEN = YELLOW = BOLD = PLAIN = None
 
 
-def check_tty(tty, color):
+def _check_tty(tty, color):
     global RED, GREEN, YELLOW, BOLD, PLAIN
     color_ok = tty.isatty() and (os.environ.get('TERM') or 'dumb') != 'dumb'
     if (color and color_ok) or color >= 2:
@@ -106,21 +106,14 @@ _log = None
 
 def setup(tty, pretty, color):
     global _log
-    if pretty or env.v.PRETTY:
-        check_tty(tty, color=color)
+    if pretty:
+        _check_tty(tty, color=color)
         _log = PrettyLog(tty=tty)
     else:
         _log = RawLog(tty=tty)
 
 
-def _maybe_setup():
-    # FIXME: explicitly initialize in each program, for clarity
-    if not _log:
-        setup(tty=sys.stderr, pretty=env.v.PRETTY, color=env.v.COLOR)
-
-
 def write(s):
-    _maybe_setup()
     _log.write(s)