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Reformat docstrings.

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Standardize whitespace in function calls.
This commit is contained in:
Greg Ward 2000-09-26 02:00:51 +00:00
parent be86bdea73
commit a30f7aca08
1 changed files with 39 additions and 36 deletions
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75
Lib/distutils/spawn.py
View file

@ -3,7 +3,8 @@
Provides the 'spawn()' function, a front-end to various platform- Provides the 'spawn()' function, a front-end to various platform-
specific functions for launching another program in a sub-process. specific functions for launching another program in a sub-process.
Also provides the 'find_executable()' to search the path for a given Also provides the 'find_executable()' to search the path for a given
executable name. """ executable name.
"""
# created 1999/07/24, Greg Ward # created 1999/07/24, Greg Ward
@ -19,24 +20,24 @@ def spawn (cmd,
dry_run=0): dry_run=0):
"""Run another program, specified as a command list 'cmd', in a new """Run another program, specified as a command list 'cmd', in a new
process. 'cmd' is just the argument list for the new process, ie. process. 'cmd' is just the argument list for the new process, ie.
cmd[0] is the program to run and cmd[1:] are the rest of its cmd[0] is the program to run and cmd[1:] are the rest of its arguments.
arguments. There is no way to run a program with a name different There is no way to run a program with a name different from that of its
from that of its executable. executable.
If 'search_path' is true (the default), the system's executable If 'search_path' is true (the default), the system's executable search
search path will be used to find the program; otherwise, cmd[0] must path will be used to find the program; otherwise, cmd[0] must be the
be the exact path to the executable. If 'verbose' is true, a exact path to the executable. If 'verbose' is true, a one-line summary
one-line summary of the command will be printed before it is run. of the command will be printed before it is run. If 'dry_run' is true,
If 'dry_run' is true, the command will not actually be run. the command will not actually be run.
Raise DistutilsExecError if running the program fails in any way;
just return on success."""
Raise DistutilsExecError if running the program fails in any way; just
return on success.
"""
if os.name == 'posix': if os.name == 'posix':
_spawn_posix (cmd, search_path, verbose, dry_run) _spawn_posix(cmd, search_path, verbose, dry_run)
elif os.name == 'nt': elif os.name == 'nt':
_spawn_nt (cmd, search_path, verbose, dry_run) _spawn_nt(cmd, search_path, verbose, dry_run)
else: else:
raise DistutilsPlatformError, \ raise DistutilsPlatformError, \
"don't know how to spawn programs on platform '%s'" % os.name "don't know how to spawn programs on platform '%s'" % os.name
@ -45,8 +46,10 @@ def spawn (cmd,
def _nt_quote_args (args): def _nt_quote_args (args):
"""Obscure quoting command line arguments on NT. """Quote command-line arguments for DOS/Windows conventions: just
Simply quote every argument which contains blanks.""" wraps every argument which contains blanks in double quotes, and
returns a new argument list.
"""
# XXX this doesn't seem very robust to me -- but if the Windows guys # XXX this doesn't seem very robust to me -- but if the Windows guys
# say it'll work, I guess I'll have to accept it. (What if an arg # say it'll work, I guess I'll have to accept it. (What if an arg
@ -54,8 +57,8 @@ def _nt_quote_args (args):
# have to be escaped? Is there an escaping mechanism other than # have to be escaped? Is there an escaping mechanism other than
# quoting?) # quoting?)
for i in range (len (args)): for i in range(len(args)):
if string.find (args[i], ' ') != -1: if string.find(args[i], ' ') != -1:
args[i] = '"%s"' % args[i] args[i] = '"%s"' % args[i]
return args return args
@ -65,16 +68,16 @@ def _spawn_nt (cmd,
dry_run=0): dry_run=0):
executable = cmd[0] executable = cmd[0]
cmd = _nt_quote_args (cmd) cmd = _nt_quote_args(cmd)
if search_path: if search_path:
# either we find one or it stays the same # either we find one or it stays the same
executable = find_executable(executable) or executable executable = find_executable(executable) or executable
if verbose: if verbose:
print string.join ([executable] + cmd[1:], ' ') print string.join([executable] + cmd[1:], ' ')
if not dry_run: if not dry_run:
# spawn for NT requires a full path to the .exe # spawn for NT requires a full path to the .exe
try: try:
rc = os.spawnv (os.P_WAIT, executable, cmd) rc = os.spawnv(os.P_WAIT, executable, cmd)
except OSError, exc: except OSError, exc:
# this seems to happen when the command isn't found # this seems to happen when the command isn't found
raise DistutilsExecError, \ raise DistutilsExecError, \
@ -91,39 +94,39 @@ def _spawn_posix (cmd,
dry_run=0): dry_run=0):
if verbose: if verbose:
print string.join (cmd, ' ') print string.join(cmd, ' ')
if dry_run: if dry_run:
return return
exec_fn = search_path and os.execvp or os.execv exec_fn = search_path and os.execvp or os.execv
pid = os.fork () pid = os.fork()
if pid == 0: # in the child if pid == 0: # in the child
try: try:
#print "cmd[0] =", cmd[0] #print "cmd[0] =", cmd[0]
#print "cmd =", cmd #print "cmd =", cmd
exec_fn (cmd[0], cmd) exec_fn(cmd[0], cmd)
except OSError, e: except OSError, e:
sys.stderr.write ("unable to execute %s: %s\n" % sys.stderr.write("unable to execute %s: %s\n" %
(cmd[0], e.strerror)) (cmd[0], e.strerror))
os._exit (1) os._exit(1)
sys.stderr.write ("unable to execute %s for unknown reasons" % cmd[0]) sys.stderr.write("unable to execute %s for unknown reasons" % cmd[0])
os._exit (1) os._exit(1)
else: # in the parent else: # in the parent
# Loop until the child either exits or is terminated by a signal # Loop until the child either exits or is terminated by a signal
# (ie. keep waiting if it's merely stopped) # (ie. keep waiting if it's merely stopped)
while 1: while 1:
(pid, status) = os.waitpid (pid, 0) (pid, status) = os.waitpid(pid, 0)
if os.WIFSIGNALED (status): if os.WIFSIGNALED(status):
raise DistutilsExecError, \ raise DistutilsExecError, \
"command '%s' terminated by signal %d" % \ "command '%s' terminated by signal %d" % \
(cmd[0], os.WTERMSIG (status)) (cmd[0], os.WTERMSIG(status))
elif os.WIFEXITED (status): elif os.WIFEXITED(status):
exit_status = os.WEXITSTATUS (status) exit_status = os.WEXITSTATUS(status)
if exit_status == 0: if exit_status == 0:
return # hey, it succeeded! return # hey, it succeeded!
else: else:
@ -131,7 +134,7 @@ def _spawn_posix (cmd,
"command '%s' failed with exit status %d" % \ "command '%s' failed with exit status %d" % \
(cmd[0], exit_status) (cmd[0], exit_status)
elif os.WIFSTOPPED (status): elif os.WIFSTOPPED(status):
continue continue
else: else: