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bpython/bpython/args.py at b51663c3e6326b572fd03e2fa545f0f60a3589c4 · bpython/bpython · GitHub
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"""
Module to handle command line argument parsing, for all front-ends.
"""
from
__future__
import
with_statement
,
print_function
import
os
import
sys
import
code
from
optparse
import
OptionParser
,
OptionGroup
from
bpython
import
__version__
from
bpython
.
config
import
default_config_path
,
loadini
,
Struct
from
bpython
.
translations
import
_
class
OptionParserFailed
(
ValueError
):
"""Raised by the RaisingOptionParser for a bogus commandline."""
class
RaisingOptionParser
(
OptionParser
):
def
error
(
self
,
msg
):
raise
OptionParserFailed
()
def
version_banner
():
return
'bpython version %s on top of Python %s %s'
%
(
__version__
,
sys
.
version
.
split
()[
0
],
sys
.
executable
)
def
parse
(
args
,
extras
=
None
,
ignore_stdin
=
False
):
"""Receive an argument list - if None, use sys.argv - parse all args and
take appropriate action. Also receive optional extra options: this should
be a tuple of (title, description, options)
title: The title for the option group
description: A full description of the option group
options: A list of optparse.Option objects to be added to the
group
e.g.:
parse(
['-i', '-m', 'foo.py'],
('Front end-specific options',
'A full description of what these options are for',
[optparse.Option('-f', action='store_true', dest='f', help='Explode'),
optparse.Option('-l', action='store_true', dest='l', help='Love')]))
Return a tuple of (config, options, exec_args) wherein "config" is the
config object either parsed from a default/specified config file or default
config options, "options" is the parsed options from
OptionParser.parse_args, and "exec_args" are the args (if any) to be parsed
to the executed file (if any).
"""
if
args
is
None
:
args
=
sys
.
argv
[
1
:]
parser
=
RaisingOptionParser
(
usage
=
_
(
'Usage: %prog [options] [file [args]]
\n
'
'NOTE: If bpython sees an argument it does '
'not know, execution falls back to the '
'regular Python interpreter.'
))
# This is not sufficient if bpython gains its own -m support
# (instead of falling back to Python itself for that).
# That's probably fixable though, for example by having that
# option swallow all remaining arguments in a callback.
parser
.
disable_interspersed_args
()
parser
.
add_option
(
'--config'
,
default
=
default_config_path
(),
help
=
_
(
'Use CONFIG instead of default config file.'
))
parser
.
add_option
(
'--interactive'
,
'-i'
,
action
=
'store_true'
,
help
=
_
(
'Drop to bpython shell after running file '
'instead of exiting.'
))
parser
.
add_option
(
'--quiet'
,
'-q'
,
action
=
'store_true'
,
help
=
_
(
"Don't flush the output to stdout."
))
parser
.
add_option
(
'--version'
,
'-V'
,
action
=
'store_true'
,
help
=
_
(
'Print version and exit.'
))
if
extras
is
not
None
:
extras_group
=
OptionGroup
(
parser
,
extras
[
0
],
extras
[
1
])
for
option
in
extras
[
2
]:
extras_group
.
add_option
(
option
)
parser
.
add_option_group
(
extras_group
)
try
:
options
,
args
=
parser
.
parse_args
(
args
)
except
OptionParserFailed
:
# Just let Python handle this
os
.
execv
(
sys
.
executable
, [
sys
.
executable
]
+
args
)
if
options
.
version
:
print
(
'bpython version'
,
__version__
,
end
=
" "
)
print
(
'on top of Python'
,
sys
.
version
.
split
()[
0
])
print
(
'(C) 2008-2015 Bob Farrell, Andreas Stuehrk et al. '
'See AUTHORS for detail.'
)
raise
SystemExit
if
not
ignore_stdin
and
not
(
sys
.
stdin
.
isatty
()
and
sys
.
stdout
.
isatty
()):
interpreter
=
code
.
InteractiveInterpreter
()
interpreter
.
runsource
(
sys
.
stdin
.
read
())
raise
SystemExit
config
=
Struct
()
loadini
(
config
,
options
.
config
)
return
config
,
options
,
args
def
exec_code
(
interpreter
,
args
):
"""
Helper to execute code in a given interpreter. args should be a [faked]
sys.argv
"""
with
open
(
args
[
0
],
'r'
)
as
sourcefile
:
source
=
sourcefile
.
read
()
old_argv
,
sys
.
argv
=
sys
.
argv
,
args
sys
.
path
.
insert
(
0
,
os
.
path
.
abspath
(
os
.
path
.
dirname
(
args
[
0
])))
interpreter
.
locals
[
'__file__'
]
=
args
[
0
]
interpreter
.
runsource
(
source
,
args
[
0
],
'exec'
)
sys
.
argv
=
old_argv
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