Interactive.py
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上传日期:2018-11-18
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- #
- # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 The SCons Foundation
- #
- # Permission is hereby granted, free of charge, to any person obtaining
- # a copy of this software and associated documentation files (the
- # "Software"), to deal in the Software without restriction, including
- # without limitation the rights to use, copy, modify, merge, publish,
- # distribute, sublicense, and/or sell copies of the Software, and to
- # permit persons to whom the Software is furnished to do so, subject to
- # the following conditions:
- #
- # The above copyright notice and this permission notice shall be included
- # in all copies or substantial portions of the Software.
- #
- # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
- # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- #
- __revision__ = "src/engine/SCons/Script/Interactive.py 3057 2008/06/09 22:21:00 knight"
- __doc__ = """
- SCons interactive mode
- """
- # TODO:
- #
- # This has the potential to grow into something with a really big life
- # of its own, which might or might not be a good thing. Nevertheless,
- # here are some enhancements that will probably be requested some day
- # and are worth keeping in mind (assuming this takes off):
- #
- # - A command to re-read / re-load the SConscript files. This may
- # involve allowing people to specify command-line options (e.g. -f,
- # -I, --no-site-dir) that affect how the SConscript files are read.
- #
- # - Additional command-line options on the "build" command.
- #
- # Of the supported options that seemed to make sense (after a quick
- # pass through the list), the ones that seemed likely enough to be
- # used are listed in the man page and have explicit test scripts.
- #
- # These had code changed in Script/Main.py to support them, but didn't
- # seem likely to be used regularly, so had no test scripts added:
- #
- # build --diskcheck=*
- # build --implicit-cache=*
- # build --implicit-deps-changed=*
- # build --implicit-deps-unchanged=*
- #
- # These look like they should "just work" with no changes to the
- # existing code, but like those above, look unlikely to be used and
- # therefore had no test scripts added:
- #
- # build --random
- #
- # These I'm not sure about. They might be useful for individual
- # "build" commands, and may even work, but they seem unlikely enough
- # that we'll wait until they're requested before spending any time on
- # writing test scripts for them, or investigating whether they work.
- #
- # build -q [??? is there a useful analog to the exit status?]
- # build --duplicate=
- # build --profile=
- # build --max-drift=
- # build --warn=*
- # build --Y
- #
- # - Most of the SCons command-line options that the "build" command
- # supports should be settable as default options that apply to all
- # subsequent "build" commands. Maybe a "set {option}" command that
- # maps to "SetOption('{option}')".
- #
- # - Need something in the 'help' command that prints the -h output.
- #
- # - A command to run the configure subsystem separately (must see how
- # this interacts with the new automake model).
- #
- # - Command-line completion of target names; maybe even of SCons options?
- # Completion is something that's supported by the Python cmd module,
- # so this should be doable without too much trouble.
- #
- import cmd
- import copy
- import os
- import re
- import shlex
- import string
- import sys
- try:
- import readline
- except ImportError:
- pass
- from SCons.Debug import Trace
- class SConsInteractiveCmd(cmd.Cmd):
- """
- build [TARGETS] Build the specified TARGETS and their dependencies.
- 'b' is a synonym.
- clean [TARGETS] Clean (remove) the specified TARGETS and their
- dependencies. 'c' is a synonym.
- exit Exit SCons interactive mode.
- help [COMMAND] Prints help for the specified COMMAND. 'h' and
- '?' are synonyms.
- shell [COMMANDLINE] Execute COMMANDLINE in a subshell. 'sh' and '!'
- are synonyms.
- version Prints SCons version information.
- """
- synonyms = {
- 'b' : 'build',
- 'c' : 'clean',
- 'h' : 'help',
- 'scons' : 'build',
- 'sh' : 'shell',
- }
- def __init__(self, **kw):
- cmd.Cmd.__init__(self)
- for key, val in kw.items():
- setattr(self, key, val)
- if sys.platform == 'win32':
- self.shell_variable = 'COMSPEC'
- else:
- self.shell_variable = 'SHELL'
- def default(self, argv):
- print "*** Unknown command: %s" % argv[0]
- def onecmd(self, line):
- line = string.strip(line)
- if not line:
- print self.lastcmd
- return self.emptyline()
- self.lastcmd = line
- if line[0] == '!':
- line = 'shell ' + line[1:]
- elif line[0] == '?':
- line = 'help ' + line[1:]
- if os.sep == '\':
- line = string.replace(line, '\', '\\')
- argv = shlex.split(line)
- argv[0] = self.synonyms.get(argv[0], argv[0])
- if not argv[0]:
- return self.default(line)
- else:
- try:
- func = getattr(self, 'do_' + argv[0])
- except AttributeError:
- return self.default(argv)
- return func(argv)
- def do_build(self, argv):
- """
- build [TARGETS] Build the specified TARGETS and their
- dependencies. 'b' is a synonym.
- """
- import SCons.SConsign
- import SCons.Script.Main
- options = copy.deepcopy(self.options)
- options, targets = self.parser.parse_args(argv[1:], values=options)
- SCons.Script.COMMAND_LINE_TARGETS = targets
- if targets:
- SCons.Script.BUILD_TARGETS = targets
- else:
- # If the user didn't specify any targets on the command line,
- # use the list of default targets.
- SCons.Script.BUILD_TARGETS = SCons.Script._build_plus_default
- nodes = SCons.Script.Main._build_targets(self.fs,
- options,
- targets,
- self.target_top)
- if not nodes:
- return
- # Call each of the Node's alter_targets() methods, which may
- # provide additional targets that ended up as part of the build
- # (the canonical example being a VariantDir() when we're building
- # from a source directory) and which we therefore need their
- # state cleared, too.
- x = []
- for n in nodes:
- x.extend(n.alter_targets()[0])
- nodes.extend(x)
- # Clean up so that we can perform the next build correctly.
- #
- # We do this by walking over all the children of the targets,
- # and clearing their state.
- #
- # We currently have to re-scan each node to find their
- # children, because built nodes have already been partially
- # cleared and don't remember their children. (In scons
- # 0.96.1 and earlier, this wasn't the case, and we didn't
- # have to re-scan the nodes.)
- #
- # Because we have to re-scan each node, we can't clear the
- # nodes as we walk over them, because we may end up rescanning
- # a cleared node as we scan a later node. Therefore, only
- # store the list of nodes that need to be cleared as we walk
- # the tree, and clear them in a separate pass.
- #
- # XXX: Someone more familiar with the inner workings of scons
- # may be able to point out a more efficient way to do this.
- SCons.Script.Main.progress_display("scons: Clearing cached node information ...")
- seen_nodes = {}
- def get_unseen_children(node, parent, seen_nodes=seen_nodes):
- def is_unseen(node, seen_nodes=seen_nodes):
- return not seen_nodes.has_key(node)
- return filter(is_unseen, node.children(scan=1))
- def add_to_seen_nodes(node, parent, seen_nodes=seen_nodes):
- seen_nodes[node] = 1
- # If this file is in a VariantDir and has a
- # corresponding source file in the source tree, remember the
- # node in the source tree, too. This is needed in
- # particular to clear cached implicit dependencies on the
- # source file, since the scanner will scan it if the
- # VariantDir was created with duplicate=0.
- try:
- rfile_method = node.rfile
- except AttributeError:
- return
- else:
- rfile = rfile_method()
- if rfile != node:
- seen_nodes[rfile] = 1
- for node in nodes:
- walker = SCons.Node.Walker(node,
- kids_func=get_unseen_children,
- eval_func=add_to_seen_nodes)
- n = walker.next()
- while n:
- n = walker.next()
- for node in seen_nodes.keys():
- # Call node.clear() to clear most of the state
- node.clear()
- # node.clear() doesn't reset node.state, so call
- # node.set_state() to reset it manually
- node.set_state(SCons.Node.no_state)
- node.implicit = None
- SCons.SConsign.Reset()
- SCons.Script.Main.progress_display("scons: done clearing node information.")
- def do_clean(self, argv):
- """
- clean [TARGETS] Clean (remove) the specified TARGETS
- and their dependencies. 'c' is a synonym.
- """
- return self.do_build(['build', '--clean'] + argv[1:])
- def do_EOF(self, argv):
- print
- self.do_exit(argv)
- def _do_one_help(self, arg):
- try:
- # If help_<arg>() exists, then call it.
- func = getattr(self, 'help_' + arg)
- except AttributeError:
- try:
- func = getattr(self, 'do_' + arg)
- except AttributeError:
- doc = None
- else:
- doc = self._doc_to_help(func)
- if doc:
- sys.stdout.write(doc + 'n')
- sys.stdout.flush()
- else:
- doc = self.strip_initial_spaces(func())
- if doc:
- sys.stdout.write(doc + 'n')
- sys.stdout.flush()
- def _doc_to_help(self, obj):
- doc = obj.__doc__
- if doc is None:
- return ''
- return self._strip_initial_spaces(doc)
- def _strip_initial_spaces(self, s):
- #lines = s.split('n')
- lines = string.split(s, 'n')
- spaces = re.match(' *', lines[0]).group(0)
- #def strip_spaces(l):
- # if l.startswith(spaces):
- # l = l[len(spaces):]
- # return l
- #return 'n'.join([ strip_spaces(l) for l in lines ])
- def strip_spaces(l, spaces=spaces):
- if l[:len(spaces)] == spaces:
- l = l[len(spaces):]
- return l
- lines = map(strip_spaces, lines)
- return string.join(lines, 'n')
- def do_exit(self, argv):
- """
- exit Exit SCons interactive mode.
- """
- sys.exit(0)
- def do_help(self, argv):
- """
- help [COMMAND] Prints help for the specified COMMAND. 'h'
- and '?' are synonyms.
- """
- if argv[1:]:
- for arg in argv[1:]:
- if self._do_one_help(arg):
- break
- else:
- # If bare 'help' is called, print this class's doc
- # string (if it has one).
- doc = self._doc_to_help(self.__class__)
- if doc:
- sys.stdout.write(doc + 'n')
- sys.stdout.flush()
- def do_shell(self, argv):
- """
- shell [COMMANDLINE] Execute COMMANDLINE in a subshell. 'sh' and
- '!' are synonyms.
- """
- import subprocess
- argv = argv[1:]
- if not argv:
- argv = os.environ[self.shell_variable]
- try:
- p = subprocess.Popen(argv)
- except EnvironmentError, e:
- sys.stderr.write('scons: %s: %sn' % (argv[0], e.strerror))
- else:
- p.wait()
- def do_version(self, argv):
- """
- version Prints SCons version information.
- """
- sys.stdout.write(self.parser.version + 'n')
- def interact(fs, parser, options, targets, target_top):
- c = SConsInteractiveCmd(prompt = 'scons>>> ',
- fs = fs,
- parser = parser,
- options = options,
- targets = targets,
- target_top = target_top)
- c.cmdloop()