mirror of https://github.com/python/cpython
Marching towards full support of config files: thoroughly overhauled the
command-line parsing code, splitting it up into several methods (new
methods: '_parse_command_opts()', '_show_help()') and making it put options
into the 'command_options' dictionary rather than instantiating command
objects and putting them there.
Lots of other little changes:
* merged 'find_command_class()' and 'create_command_obj()' and
called the result 'get_command_class()'
* renamed 'find_command_obj()' to 'get_command_obj()', and added
command object creation and maintenance of the command object cache to
its responsibilities (taken over from 'create_command_obj()')
* parse config files one-at-a-time, so we can keep track of the
filename for later error reporting
* tweaked some help messages
* fixed up many obsolete comments and docstrings
This commit is contained in:
Greg Ward
parent
32000e8464
commit
d5d8a9982b
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@ -48,15 +48,10 @@ class Distribution:
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# since every global option is also valid as a command option -- and we
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# don't want to pollute the commands with too many options that they
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# have minimal control over.
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global_options = [('verbose', 'v',
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"run verbosely (default)"),
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('quiet', 'q',
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"run quietly (turns verbosity off)"),
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('dry-run', 'n',
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"don't actually do anything"),
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('help', 'h',
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"show this help message, plus help for any commands " +
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"given on the command-line"),
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global_options = [('verbose', 'v', "run verbosely (default)"),
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('quiet', 'q', "run quietly (turns verbosity off)"),
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('dry-run', 'n', "don't actually do anything"),
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('help', 'h', "show detailed help message"),
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]
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# options that are not propagated to the commands
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@ -78,11 +73,9 @@ class Distribution:
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('maintainer-email', None,
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"print the maintainer's email address"),
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('contact', None,
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"print the name of the maintainer if present, "
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"else author"),
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"print the maintainer's name if known, else the author's"),
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('contact-email', None,
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"print the email of the maintainer if present, "
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"else author"),
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"print the maintainer's email address if known, else the author's"),
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('url', None,
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"print the URL for this package"),
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('licence', None,
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@ -139,9 +132,11 @@ class Distribution:
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# for the setup script to override command classes
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self.cmdclass = {}
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# Store options for commands here between parsing them (from config
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# files, the command-line, etc.) and actually putting them into the
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# command object that needs them.
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# 'command_options' is where we store command options between
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# parsing them (from config files, the command-line, etc.) and when
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# they are actually needed -- ie. when the command in question is
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# instantiated. It is a dictionary of dictionaries of 2-tuples:
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# command_options = { command_name : { option : (source, value) } }
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self.command_options = {}
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# These options are really the business of various commands, rather
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@ -190,7 +185,7 @@ class Distribution:
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if options:
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del attrs['options']
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for (command, cmd_options) in options.items():
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cmd_obj = self.find_command_obj (command)
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cmd_obj = self.get_command_obj (command)
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for (key, val) in cmd_options.items():
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cmd_obj.set_option (key, val)
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# loop over commands
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@ -210,6 +205,8 @@ class Distribution:
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# __init__ ()
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# -- Config file finding/parsing methods ---------------------------
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def find_config_files (self):
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"""Find as many configuration files as should be processed for this
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platform, and return a list of filenames in the order in which they
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@ -223,8 +220,8 @@ class Distribution:
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On Windows and Mac OS, there are two possible config files:
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pydistutils.cfg in the Python installation directory (sys.prefix)
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and setup.cfg in the current directory."""
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and setup.cfg in the current directory.
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"""
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files = []
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if os.name == "posix":
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check_environ()
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@ -262,54 +259,50 @@ class Distribution:
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filenames = self.find_config_files()
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parser = ConfigParser()
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parser.read(filenames)
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for section in parser.sections():
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options = parser.options(section)
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if not self.command_options.has_key(section) is None:
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self.command_options[section] = {}
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cmd_opts = self.command_options[section]
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for filename in filenames:
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parser.read(filename)
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for section in parser.sections():
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options = parser.options(section)
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if not self.command_options.has_key(section):
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self.command_options[section] = {}
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opts = self.command_options[section]
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for opt in options:
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if opt != '__name__':
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cmd_opts[opt] = parser.get(section,opt)
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for opt in options:
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if opt != '__name__':
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opts[opt] = (filename, parser.get(section,opt))
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from pprint import pprint
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print "configuration options:"
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print "options (after parsing config files):"
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pprint (self.command_options)
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# -- Command-line parsing methods ----------------------------------
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def parse_command_line (self, args):
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"""Parse the setup script's command line: set any Distribution
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attributes tied to command-line options, create all command
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objects, and set their options from the command-line. 'args'
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must be a list of command-line arguments, most likely
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'sys.argv[1:]' (see the 'setup()' function). This list is first
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processed for "global options" -- options that set attributes of
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the Distribution instance. Then, it is alternately scanned for
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Distutils command and options for that command. Each new
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command terminates the options for the previous command. The
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allowed options for a command are determined by the 'options'
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attribute of the command object -- thus, we instantiate (and
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cache) every command object here, in order to access its
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'options' attribute. Any error in that 'options' attribute
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raises DistutilsGetoptError; any error on the command-line
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raises DistutilsArgError. If no Distutils commands were found
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on the command line, raises DistutilsArgError. Return true if
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command-line successfully parsed and we should carry on with
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executing commands; false if no errors but we shouldn't execute
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commands (currently, this only happens if user asks for
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help)."""
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# late import because of mutual dependence between these modules
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from distutils.cmd import Command
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from distutils.core import usage
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"""Parse the setup script's command line. 'args' must be a list
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of command-line arguments, most likely 'sys.argv[1:]' (see the
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'setup()' function). This list is first processed for "global
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options" -- options that set attributes of the Distribution
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instance. Then, it is alternately scanned for Distutils
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commands and options for that command. Each new command
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terminates the options for the previous command. The allowed
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options for a command are determined by the 'user_options'
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attribute of the command class -- thus, we have to be able to
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load command classes in order to parse the command line. Any
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error in that 'options' attribute raises DistutilsGetoptError;
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any error on the command-line raises DistutilsArgError. If no
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Distutils commands were found on the command line, raises
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DistutilsArgError. Return true if command-line were
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successfully parsed and we should carry on with executing
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commands; false if no errors but we shouldn't execute commands
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(currently, this only happens if user asks for help).
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"""
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# We have to parse the command line a bit at a time -- global
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# options, then the first command, then its options, and so on --
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# because each command will be handled by a different class, and
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# the options that are valid for a particular class aren't
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# known until we instantiate the command class, which doesn't
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# happen until we know what the command is.
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# the options that are valid for a particular class aren't known
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# until we have loaded the command class, which doesn't happen
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# until we know what the command is.
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self.commands = []
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parser = FancyGetopt (self.global_options + self.display_options)
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@ -323,91 +316,21 @@ class Distribution:
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return
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while args:
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# Pull the current command from the head of the command line
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command = args[0]
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if not command_re.match (command):
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raise SystemExit, "invalid command name '%s'" % command
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self.commands.append (command)
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# Make sure we have a command object to put the options into
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# (this either pulls it out of a cache of command objects,
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# or finds and instantiates the command class).
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try:
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cmd_obj = self.find_command_obj (command)
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except DistutilsModuleError, msg:
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raise DistutilsArgError, msg
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# Require that the command class be derived from Command --
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# want to be sure that the basic "command" interface is
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# implemented.
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if not isinstance (cmd_obj, Command):
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raise DistutilsClassError, \
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"command class %s must subclass Command" % \
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cmd_obj.__class__
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# Also make sure that the command object provides a list of its
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# known options
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if not (hasattr (cmd_obj, 'user_options') and
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type (cmd_obj.user_options) is ListType):
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raise DistutilsClassError, \
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("command class %s must provide " +
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"'user_options' attribute (a list of tuples)") % \
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cmd_obj.__class__
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# Poof! like magic, all commands support the global
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# options too, just by adding in 'global_options'.
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negative_opt = self.negative_opt
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if hasattr (cmd_obj, 'negative_opt'):
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negative_opt = copy (negative_opt)
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negative_opt.update (cmd_obj.negative_opt)
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parser.set_option_table (self.global_options +
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cmd_obj.user_options)
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parser.set_negative_aliases (negative_opt)
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args = parser.getopt (args[1:], cmd_obj)
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if cmd_obj.help:
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parser.set_option_table (self.global_options)
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parser.print_help ("Global options:")
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print
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parser.set_option_table (cmd_obj.user_options)
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parser.print_help ("Options for '%s' command:" % command)
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print
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print usage
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args = self._parse_command_opts(parser, args)
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if args is None: # user asked for help (and got it)
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return
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self.command_obj[command] = cmd_obj
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self.have_run[command] = 0
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# while args
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# If the user wants help -- ie. they gave the "--help" option --
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# give it to 'em. We do this *after* processing the commands in
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# case they want help on any particular command, eg.
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# "setup.py --help foo". (This isn't the documented way to
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# get help on a command, but I support it because that's how
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# CVS does it -- might as well be consistent.)
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# Handle the cases of --help as a "global" option, ie.
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# "setup.py --help" and "setup.py --help command ...". For the
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# former, we show global options (--verbose, --dry-run, etc.)
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# and display-only options (--name, --version, etc.); for the
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# latter, we omit the display-only options and show help for
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# each command listed on the command line.
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if self.help:
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parser.set_option_table (self.global_options)
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parser.print_help (
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"Global options (apply to all commands, " +
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"or can be used per command):")
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print
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if not self.commands:
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parser.set_option_table (self.display_options)
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parser.print_help (
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"Information display options (just display " +
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"information, ignore any commands)")
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print
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for command in self.commands:
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klass = self.find_command_class (command)
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parser.set_option_table (klass.user_options)
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parser.print_help ("Options for '%s' command:" % command)
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print
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print usage
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print "showing 'global' help; commands=", self.commands
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self._show_help(parser,
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display_options=len(self.commands) == 0,
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commands=self.commands)
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return
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# Oops, no commands found -- an end-user error
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@ -419,12 +342,133 @@ class Distribution:
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# parse_command_line()
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def _parse_command_opts (self, parser, args):
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"""Parse the command-line options for a single command.
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'parser' must be a FancyGetopt instance; 'args' must be the list
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of arguments, starting with the current command (whose options
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we are about to parse). Returns a new version of 'args' with
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the next command at the front of the list; will be the empty
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list if there are no more commands on the command line. Returns
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None if the user asked for help on this command.
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"""
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# late import because of mutual dependence between these modules
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from distutils.cmd import Command
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# Pull the current command from the head of the command line
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command = args[0]
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if not command_re.match (command):
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raise SystemExit, "invalid command name '%s'" % command
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self.commands.append (command)
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# Dig up the command class that implements this command, so we
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# 1) know that it's a valid command, and 2) know which options
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# it takes.
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try:
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cmd_class = self.get_command_class (command)
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except DistutilsModuleError, msg:
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raise DistutilsArgError, msg
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# Require that the command class be derived from Command -- want
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# to be sure that the basic "command" interface is implemented.
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if not issubclass (cmd_class, Command):
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raise DistutilsClassError, \
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"command class %s must subclass Command" % cmd_class
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# Also make sure that the command object provides a list of its
|
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# known options.
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if not (hasattr (cmd_class, 'user_options') and
|
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type (cmd_class.user_options) is ListType):
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raise DistutilsClassError, \
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("command class %s must provide " +
|
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"'user_options' attribute (a list of tuples)") % \
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cmd_class
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|
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# If the command class has a list of negative alias options,
|
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# merge it in with the global negative aliases.
|
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negative_opt = self.negative_opt
|
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if hasattr (cmd_class, 'negative_opt'):
|
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negative_opt = copy (negative_opt)
|
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negative_opt.update (cmd_class.negative_opt)
|
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|
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# All commands support the global options too, just by adding
|
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# in 'global_options'.
|
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parser.set_option_table (self.global_options +
|
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cmd_class.user_options)
|
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parser.set_negative_aliases (negative_opt)
|
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(args, opts) = parser.getopt (args[1:])
|
||||
if opts.help:
|
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print "showing help for command", cmd_class
|
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self._show_help(parser, display_options=0, commands=[cmd_class])
|
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return
|
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|
||||
# Put the options from the command-line into their official
|
||||
# holding pen, the 'command_options' dictionary.
|
||||
if not self.command_options.has_key(command):
|
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self.command_options[command] = {}
|
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cmd_opts = self.command_options[command]
|
||||
for (name, value) in vars(opts).items():
|
||||
cmd_opts[command] = ("command line", value)
|
||||
|
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return args
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|
||||
# _parse_command_opts ()
|
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|
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|
||||
def _show_help (self,
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parser,
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global_options=1,
|
||||
display_options=1,
|
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commands=[]):
|
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"""Show help for the setup script command-line in the form of
|
||||
several lists of command-line options. 'parser' should be a
|
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FancyGetopt instance; do not expect it to be returned in the
|
||||
same state, as its option table will be reset to make it
|
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generate the correct help text.
|
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|
||||
If 'global_options' is true, lists the global options:
|
||||
--verbose, --dry-run, etc. If 'display_options' is true, lists
|
||||
the "display-only" options: --name, --version, etc. Finally,
|
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lists per-command help for every command name or command class
|
||||
in 'commands'.
|
||||
"""
|
||||
# late import because of mutual dependence between these modules
|
||||
from distutils.core import usage
|
||||
from distutils.cmd import Command
|
||||
|
||||
if global_options:
|
||||
parser.set_option_table (self.global_options)
|
||||
parser.print_help ("Global options:")
|
||||
print
|
||||
|
||||
if display_options:
|
||||
parser.set_option_table (self.display_options)
|
||||
parser.print_help (
|
||||
"Information display options (just display " +
|
||||
"information, ignore any commands)")
|
||||
print
|
||||
|
||||
for command in self.commands:
|
||||
if type(command) is ClassType and issubclass(klass, Command):
|
||||
klass = command
|
||||
else:
|
||||
klass = self.get_command_class (command)
|
||||
parser.set_option_table (klass.user_options)
|
||||
parser.print_help ("Options for '%s' command:" % klass.__name__)
|
||||
print
|
||||
|
||||
print usage
|
||||
return
|
||||
|
||||
# _show_help ()
|
||||
|
||||
|
||||
def handle_display_options (self, option_order):
|
||||
"""If there were any non-global "display-only" options
|
||||
(--help-commands or the metadata display options) on the command
|
||||
line, display the requested info and return true; else return
|
||||
false."""
|
||||
|
||||
(--help-commands or the metadata display options) on the command
|
||||
line, display the requested info and return true; else return
|
||||
false.
|
||||
"""
|
||||
from distutils.core import usage
|
||||
|
||||
# User just wants a list of commands -- we'll print it out and stop
|
||||
|
|
@ -456,14 +500,15 @@ class Distribution:
|
|||
|
||||
def print_command_list (self, commands, header, max_length):
|
||||
"""Print a subset of the list of all commands -- used by
|
||||
'print_commands()'."""
|
||||
'print_commands()'.
|
||||
"""
|
||||
|
||||
print header + ":"
|
||||
|
||||
for cmd in commands:
|
||||
klass = self.cmdclass.get (cmd)
|
||||
if not klass:
|
||||
klass = self.find_command_class (cmd)
|
||||
klass = self.get_command_class (cmd)
|
||||
try:
|
||||
description = klass.description
|
||||
except AttributeError:
|
||||
|
|
@ -475,12 +520,13 @@ class Distribution:
|
|||
|
||||
|
||||
def print_commands (self):
|
||||
"""Print out a help message listing all available commands with
|
||||
a description of each. The list is divided into "standard
|
||||
commands" (listed in distutils.command.__all__) and "extra
|
||||
commands" (mentioned in self.cmdclass, but not a standard
|
||||
command). The descriptions come from the command class
|
||||
attribute 'description'."""
|
||||
"""Print out a help message listing all available commands with a
|
||||
description of each. The list is divided into "standard commands"
|
||||
(listed in distutils.command.__all__) and "extra commands"
|
||||
(mentioned in self.cmdclass, but not a standard command). The
|
||||
descriptions come from the command class attribute
|
||||
'description'.
|
||||
"""
|
||||
|
||||
import distutils.command
|
||||
std_commands = distutils.command.__all__
|
||||
|
|
@ -508,19 +554,25 @@ class Distribution:
|
|||
max_length)
|
||||
|
||||
# print_commands ()
|
||||
|
||||
|
||||
|
||||
# -- Command class/object methods ----------------------------------
|
||||
|
||||
def find_command_class (self, command):
|
||||
"""Given a command name, attempts to load the module and class that
|
||||
implements that command. This is done by importing a module
|
||||
"distutils.command." + command, and a class named 'command' in that
|
||||
module.
|
||||
def get_command_class (self, command):
|
||||
"""Return the class that implements the Distutils command named by
|
||||
'command'. First we check the 'cmdclass' dictionary; if the
|
||||
command is mentioned there, we fetch the class object from the
|
||||
dictionary and return it. Otherwise we load the command module
|
||||
("distutils.command." + command) and fetch the command class from
|
||||
the module. The loaded class is also stored in 'cmdclass'
|
||||
to speed future calls to 'get_command_class()'.
|
||||
|
||||
Raises DistutilsModuleError if the expected module could not be
|
||||
found, or if that module does not define the expected class."""
|
||||
found, or if that module does not define the expected class.
|
||||
"""
|
||||
klass = self.cmdclass.get(command)
|
||||
if klass:
|
||||
return klass
|
||||
|
||||
module_name = 'distutils.command.' + command
|
||||
klass_name = command
|
||||
|
|
@ -534,50 +586,28 @@ class Distribution:
|
|||
(command, module_name)
|
||||
|
||||
try:
|
||||
klass = vars(module)[klass_name]
|
||||
except KeyError:
|
||||
klass = getattr(module, klass_name)
|
||||
except AttributeError:
|
||||
raise DistutilsModuleError, \
|
||||
"invalid command '%s' (no class '%s' in module '%s')" \
|
||||
% (command, klass_name, module_name)
|
||||
|
||||
self.cmdclass[command] = klass
|
||||
return klass
|
||||
|
||||
# find_command_class ()
|
||||
# get_command_class ()
|
||||
|
||||
|
||||
def create_command_obj (self, command):
|
||||
"""Figure out the class that should implement a command,
|
||||
instantiate it, cache and return the new "command object".
|
||||
The "command class" is determined either by looking it up in
|
||||
the 'cmdclass' attribute (this is the mechanism whereby
|
||||
clients may override default Distutils commands or add their
|
||||
own), or by calling the 'find_command_class()' method (if the
|
||||
command name is not in 'cmdclass'."""
|
||||
|
||||
# Determine the command class -- either it's in the command_class
|
||||
# dictionary, or we have to divine the module and class name
|
||||
klass = self.cmdclass.get(command)
|
||||
if not klass:
|
||||
klass = self.find_command_class (command)
|
||||
self.cmdclass[command] = klass
|
||||
|
||||
# Found the class OK -- instantiate it
|
||||
cmd_obj = klass (self)
|
||||
return cmd_obj
|
||||
|
||||
|
||||
def find_command_obj (self, command, create=1):
|
||||
"""Look up and return a command object in the cache maintained by
|
||||
'create_command_obj()'. If none found, the action taken
|
||||
depends on 'create': if true (the default), create a new
|
||||
command object by calling 'create_command_obj()' and return
|
||||
it; otherwise, return None. If 'command' is an invalid
|
||||
command name, then DistutilsModuleError will be raised."""
|
||||
|
||||
cmd_obj = self.command_obj.get (command)
|
||||
def get_command_obj (self, command, create=1):
|
||||
"""Return the command object for 'command'. Normally this object
|
||||
is cached on a previous call to 'get_command_obj()'; if no comand
|
||||
object for 'command' is in the cache, then we either create and
|
||||
return it (if 'create' is true) or return None.
|
||||
"""
|
||||
cmd_obj = self.command_obj.get(command)
|
||||
if not cmd_obj and create:
|
||||
cmd_obj = self.create_command_obj (command)
|
||||
self.command_obj[command] = cmd_obj
|
||||
klass = self.get_command_class(command)
|
||||
cmd_obj = self.command_obj[command] = klass()
|
||||
self.command_run[command] = 0
|
||||
|
||||
return cmd_obj
|
||||
|
||||
|
|
@ -586,17 +616,17 @@ class Distribution:
|
|||
|
||||
def announce (self, msg, level=1):
|
||||
"""Print 'msg' if 'level' is greater than or equal to the verbosity
|
||||
level recorded in the 'verbose' attribute (which, currently,
|
||||
can be only 0 or 1)."""
|
||||
|
||||
level recorded in the 'verbose' attribute (which, currently, can be
|
||||
only 0 or 1).
|
||||
"""
|
||||
if self.verbose >= level:
|
||||
print msg
|
||||
|
||||
|
||||
def run_commands (self):
|
||||
"""Run each command that was seen on the setup script command line.
|
||||
Uses the list of commands found and cache of command objects
|
||||
created by 'create_command_obj()'."""
|
||||
Uses the list of commands found and cache of command objects
|
||||
created by 'get_command_obj()'."""
|
||||
|
||||
for cmd in self.commands:
|
||||
self.run_command (cmd)
|
||||
|
|
@ -605,21 +635,20 @@ class Distribution:
|
|||
# -- Methods that operate on its Commands --------------------------
|
||||
|
||||
def run_command (self, command):
|
||||
|
||||
"""Do whatever it takes to run a command (including nothing at all,
|
||||
if the command has already been run). Specifically: if we have
|
||||
already created and run the command named by 'command', return
|
||||
silently without doing anything. If the command named by
|
||||
'command' doesn't even have a command object yet, create one.
|
||||
Then invoke 'run()' on that command object (or an existing
|
||||
one)."""
|
||||
if the command has already been run). Specifically: if we have
|
||||
already created and run the command named by 'command', return
|
||||
silently without doing anything. If the command named by 'command'
|
||||
doesn't even have a command object yet, create one. Then invoke
|
||||
'run()' on that command object (or an existing one).
|
||||
"""
|
||||
|
||||
# Already been here, done that? then return silently.
|
||||
if self.have_run.get (command):
|
||||
return
|
||||
|
||||
self.announce ("running " + command)
|
||||
cmd_obj = self.find_command_obj (command)
|
||||
cmd_obj = self.get_command_obj (command)
|
||||
cmd_obj.ensure_ready ()
|
||||
cmd_obj.run ()
|
||||
self.have_run[command] = 1
|
||||
|
|
|
|||
Loading…
Reference in New Issue