| 1 | n/a | """distutils.cmd |
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| 2 | n/a | |
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| 3 | n/a | Provides the Command class, the base class for the command classes |
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| 4 | n/a | in the distutils.command package. |
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| 5 | n/a | """ |
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| 6 | n/a | |
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| 7 | n/a | import sys, os, re |
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| 8 | n/a | from distutils.errors import DistutilsOptionError |
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| 9 | n/a | from distutils import util, dir_util, file_util, archive_util, dep_util |
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| 10 | n/a | from distutils import log |
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| 11 | n/a | |
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| 12 | n/a | class Command: |
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| 13 | n/a | """Abstract base class for defining command classes, the "worker bees" |
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| 14 | n/a | of the Distutils. A useful analogy for command classes is to think of |
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| 15 | n/a | them as subroutines with local variables called "options". The options |
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| 16 | n/a | are "declared" in 'initialize_options()' and "defined" (given their |
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| 17 | n/a | final values, aka "finalized") in 'finalize_options()', both of which |
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| 18 | n/a | must be defined by every command class. The distinction between the |
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| 19 | n/a | two is necessary because option values might come from the outside |
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| 20 | n/a | world (command line, config file, ...), and any options dependent on |
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| 21 | n/a | other options must be computed *after* these outside influences have |
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| 22 | n/a | been processed -- hence 'finalize_options()'. The "body" of the |
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| 23 | n/a | subroutine, where it does all its work based on the values of its |
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| 24 | n/a | options, is the 'run()' method, which must also be implemented by every |
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| 25 | n/a | command class. |
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| 26 | n/a | """ |
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| 27 | n/a | |
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| 28 | n/a | # 'sub_commands' formalizes the notion of a "family" of commands, |
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| 29 | n/a | # eg. "install" as the parent with sub-commands "install_lib", |
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| 30 | n/a | # "install_headers", etc. The parent of a family of commands |
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| 31 | n/a | # defines 'sub_commands' as a class attribute; it's a list of |
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| 32 | n/a | # (command_name : string, predicate : unbound_method | string | None) |
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| 33 | n/a | # tuples, where 'predicate' is a method of the parent command that |
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| 34 | n/a | # determines whether the corresponding command is applicable in the |
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| 35 | n/a | # current situation. (Eg. we "install_headers" is only applicable if |
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| 36 | n/a | # we have any C header files to install.) If 'predicate' is None, |
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| 37 | n/a | # that command is always applicable. |
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| 38 | n/a | # |
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| 39 | n/a | # 'sub_commands' is usually defined at the *end* of a class, because |
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| 40 | n/a | # predicates can be unbound methods, so they must already have been |
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| 41 | n/a | # defined. The canonical example is the "install" command. |
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| 42 | n/a | sub_commands = [] |
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| 43 | n/a | |
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| 44 | n/a | |
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| 45 | n/a | # -- Creation/initialization methods ------------------------------- |
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| 46 | n/a | |
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| 47 | n/a | def __init__(self, dist): |
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| 48 | n/a | """Create and initialize a new Command object. Most importantly, |
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| 49 | n/a | invokes the 'initialize_options()' method, which is the real |
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| 50 | n/a | initializer and depends on the actual command being |
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| 51 | n/a | instantiated. |
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| 52 | n/a | """ |
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| 53 | n/a | # late import because of mutual dependence between these classes |
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| 54 | n/a | from distutils.dist import Distribution |
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| 55 | n/a | |
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| 56 | n/a | if not isinstance(dist, Distribution): |
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| 57 | n/a | raise TypeError("dist must be a Distribution instance") |
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| 58 | n/a | if self.__class__ is Command: |
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| 59 | n/a | raise RuntimeError("Command is an abstract class") |
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| 60 | n/a | |
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| 61 | n/a | self.distribution = dist |
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| 62 | n/a | self.initialize_options() |
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| 63 | n/a | |
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| 64 | n/a | # Per-command versions of the global flags, so that the user can |
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| 65 | n/a | # customize Distutils' behaviour command-by-command and let some |
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| 66 | n/a | # commands fall back on the Distribution's behaviour. None means |
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| 67 | n/a | # "not defined, check self.distribution's copy", while 0 or 1 mean |
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| 68 | n/a | # false and true (duh). Note that this means figuring out the real |
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| 69 | n/a | # value of each flag is a touch complicated -- hence "self._dry_run" |
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| 70 | n/a | # will be handled by __getattr__, below. |
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| 71 | n/a | # XXX This needs to be fixed. |
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| 72 | n/a | self._dry_run = None |
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| 73 | n/a | |
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| 74 | n/a | # verbose is largely ignored, but needs to be set for |
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| 75 | n/a | # backwards compatibility (I think)? |
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| 76 | n/a | self.verbose = dist.verbose |
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| 77 | n/a | |
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| 78 | n/a | # Some commands define a 'self.force' option to ignore file |
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| 79 | n/a | # timestamps, but methods defined *here* assume that |
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| 80 | n/a | # 'self.force' exists for all commands. So define it here |
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| 81 | n/a | # just to be safe. |
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| 82 | n/a | self.force = None |
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| 83 | n/a | |
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| 84 | n/a | # The 'help' flag is just used for command-line parsing, so |
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| 85 | n/a | # none of that complicated bureaucracy is needed. |
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| 86 | n/a | self.help = 0 |
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| 87 | n/a | |
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| 88 | n/a | # 'finalized' records whether or not 'finalize_options()' has been |
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| 89 | n/a | # called. 'finalize_options()' itself should not pay attention to |
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| 90 | n/a | # this flag: it is the business of 'ensure_finalized()', which |
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| 91 | n/a | # always calls 'finalize_options()', to respect/update it. |
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| 92 | n/a | self.finalized = 0 |
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| 93 | n/a | |
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| 94 | n/a | # XXX A more explicit way to customize dry_run would be better. |
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| 95 | n/a | def __getattr__(self, attr): |
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| 96 | n/a | if attr == 'dry_run': |
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| 97 | n/a | myval = getattr(self, "_" + attr) |
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| 98 | n/a | if myval is None: |
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| 99 | n/a | return getattr(self.distribution, attr) |
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| 100 | n/a | else: |
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| 101 | n/a | return myval |
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| 102 | n/a | else: |
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| 103 | n/a | raise AttributeError(attr) |
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| 104 | n/a | |
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| 105 | n/a | def ensure_finalized(self): |
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| 106 | n/a | if not self.finalized: |
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| 107 | n/a | self.finalize_options() |
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| 108 | n/a | self.finalized = 1 |
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| 109 | n/a | |
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| 110 | n/a | # Subclasses must define: |
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| 111 | n/a | # initialize_options() |
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| 112 | n/a | # provide default values for all options; may be customized by |
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| 113 | n/a | # setup script, by options from config file(s), or by command-line |
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| 114 | n/a | # options |
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| 115 | n/a | # finalize_options() |
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| 116 | n/a | # decide on the final values for all options; this is called |
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| 117 | n/a | # after all possible intervention from the outside world |
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| 118 | n/a | # (command-line, option file, etc.) has been processed |
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| 119 | n/a | # run() |
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| 120 | n/a | # run the command: do whatever it is we're here to do, |
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| 121 | n/a | # controlled by the command's various option values |
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| 122 | n/a | |
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| 123 | n/a | def initialize_options(self): |
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| 124 | n/a | """Set default values for all the options that this command |
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| 125 | n/a | supports. Note that these defaults may be overridden by other |
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| 126 | n/a | commands, by the setup script, by config files, or by the |
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| 127 | n/a | command-line. Thus, this is not the place to code dependencies |
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| 128 | n/a | between options; generally, 'initialize_options()' implementations |
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| 129 | n/a | are just a bunch of "self.foo = None" assignments. |
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| 130 | n/a | |
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| 131 | n/a | This method must be implemented by all command classes. |
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| 132 | n/a | """ |
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| 133 | n/a | raise RuntimeError("abstract method -- subclass %s must override" |
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| 134 | n/a | % self.__class__) |
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| 135 | n/a | |
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| 136 | n/a | def finalize_options(self): |
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| 137 | n/a | """Set final values for all the options that this command supports. |
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| 138 | n/a | This is always called as late as possible, ie. after any option |
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| 139 | n/a | assignments from the command-line or from other commands have been |
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| 140 | n/a | done. Thus, this is the place to code option dependencies: if |
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| 141 | n/a | 'foo' depends on 'bar', then it is safe to set 'foo' from 'bar' as |
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| 142 | n/a | long as 'foo' still has the same value it was assigned in |
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| 143 | n/a | 'initialize_options()'. |
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| 144 | n/a | |
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| 145 | n/a | This method must be implemented by all command classes. |
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| 146 | n/a | """ |
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| 147 | n/a | raise RuntimeError("abstract method -- subclass %s must override" |
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| 148 | n/a | % self.__class__) |
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| 149 | n/a | |
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| 150 | n/a | |
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| 151 | n/a | def dump_options(self, header=None, indent=""): |
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| 152 | n/a | from distutils.fancy_getopt import longopt_xlate |
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| 153 | n/a | if header is None: |
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| 154 | n/a | header = "command options for '%s':" % self.get_command_name() |
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| 155 | n/a | self.announce(indent + header, level=log.INFO) |
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| 156 | n/a | indent = indent + " " |
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| 157 | n/a | for (option, _, _) in self.user_options: |
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| 158 | n/a | option = option.translate(longopt_xlate) |
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| 159 | n/a | if option[-1] == "=": |
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| 160 | n/a | option = option[:-1] |
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| 161 | n/a | value = getattr(self, option) |
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| 162 | n/a | self.announce(indent + "%s = %s" % (option, value), |
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| 163 | n/a | level=log.INFO) |
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| 164 | n/a | |
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| 165 | n/a | def run(self): |
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| 166 | n/a | """A command's raison d'etre: carry out the action it exists to |
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| 167 | n/a | perform, controlled by the options initialized in |
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| 168 | n/a | 'initialize_options()', customized by other commands, the setup |
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| 169 | n/a | script, the command-line, and config files, and finalized in |
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| 170 | n/a | 'finalize_options()'. All terminal output and filesystem |
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| 171 | n/a | interaction should be done by 'run()'. |
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| 172 | n/a | |
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| 173 | n/a | This method must be implemented by all command classes. |
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| 174 | n/a | """ |
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| 175 | n/a | raise RuntimeError("abstract method -- subclass %s must override" |
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| 176 | n/a | % self.__class__) |
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| 177 | n/a | |
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| 178 | n/a | def announce(self, msg, level=1): |
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| 179 | n/a | """If the current verbosity level is of greater than or equal to |
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| 180 | n/a | 'level' print 'msg' to stdout. |
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| 181 | n/a | """ |
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| 182 | n/a | log.log(level, msg) |
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| 183 | n/a | |
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| 184 | n/a | def debug_print(self, msg): |
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| 185 | n/a | """Print 'msg' to stdout if the global DEBUG (taken from the |
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| 186 | n/a | DISTUTILS_DEBUG environment variable) flag is true. |
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| 187 | n/a | """ |
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| 188 | n/a | from distutils.debug import DEBUG |
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| 189 | n/a | if DEBUG: |
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| 190 | n/a | print(msg) |
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| 191 | n/a | sys.stdout.flush() |
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| 192 | n/a | |
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| 193 | n/a | |
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| 194 | n/a | # -- Option validation methods ------------------------------------- |
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| 195 | n/a | # (these are very handy in writing the 'finalize_options()' method) |
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| 196 | n/a | # |
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| 197 | n/a | # NB. the general philosophy here is to ensure that a particular option |
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| 198 | n/a | # value meets certain type and value constraints. If not, we try to |
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| 199 | n/a | # force it into conformance (eg. if we expect a list but have a string, |
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| 200 | n/a | # split the string on comma and/or whitespace). If we can't force the |
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| 201 | n/a | # option into conformance, raise DistutilsOptionError. Thus, command |
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| 202 | n/a | # classes need do nothing more than (eg.) |
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| 203 | n/a | # self.ensure_string_list('foo') |
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| 204 | n/a | # and they can be guaranteed that thereafter, self.foo will be |
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| 205 | n/a | # a list of strings. |
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| 206 | n/a | |
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| 207 | n/a | def _ensure_stringlike(self, option, what, default=None): |
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| 208 | n/a | val = getattr(self, option) |
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| 209 | n/a | if val is None: |
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| 210 | n/a | setattr(self, option, default) |
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| 211 | n/a | return default |
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| 212 | n/a | elif not isinstance(val, str): |
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| 213 | n/a | raise DistutilsOptionError("'%s' must be a %s (got `%s`)" |
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| 214 | n/a | % (option, what, val)) |
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| 215 | n/a | return val |
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| 216 | n/a | |
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| 217 | n/a | def ensure_string(self, option, default=None): |
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| 218 | n/a | """Ensure that 'option' is a string; if not defined, set it to |
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| 219 | n/a | 'default'. |
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| 220 | n/a | """ |
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| 221 | n/a | self._ensure_stringlike(option, "string", default) |
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| 222 | n/a | |
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| 223 | n/a | def ensure_string_list(self, option): |
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| 224 | n/a | r"""Ensure that 'option' is a list of strings. If 'option' is |
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| 225 | n/a | currently a string, we split it either on /,\s*/ or /\s+/, so |
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| 226 | n/a | "foo bar baz", "foo,bar,baz", and "foo, bar baz" all become |
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| 227 | n/a | ["foo", "bar", "baz"]. |
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| 228 | n/a | """ |
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| 229 | n/a | val = getattr(self, option) |
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| 230 | n/a | if val is None: |
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| 231 | n/a | return |
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| 232 | n/a | elif isinstance(val, str): |
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| 233 | n/a | setattr(self, option, re.split(r',\s*|\s+', val)) |
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| 234 | n/a | else: |
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| 235 | n/a | if isinstance(val, list): |
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| 236 | n/a | ok = all(isinstance(v, str) for v in val) |
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| 237 | n/a | else: |
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| 238 | n/a | ok = False |
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| 239 | n/a | if not ok: |
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| 240 | n/a | raise DistutilsOptionError( |
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| 241 | n/a | "'%s' must be a list of strings (got %r)" |
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| 242 | n/a | % (option, val)) |
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| 243 | n/a | |
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| 244 | n/a | def _ensure_tested_string(self, option, tester, what, error_fmt, |
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| 245 | n/a | default=None): |
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| 246 | n/a | val = self._ensure_stringlike(option, what, default) |
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| 247 | n/a | if val is not None and not tester(val): |
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| 248 | n/a | raise DistutilsOptionError(("error in '%s' option: " + error_fmt) |
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| 249 | n/a | % (option, val)) |
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| 250 | n/a | |
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| 251 | n/a | def ensure_filename(self, option): |
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| 252 | n/a | """Ensure that 'option' is the name of an existing file.""" |
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| 253 | n/a | self._ensure_tested_string(option, os.path.isfile, |
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| 254 | n/a | "filename", |
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| 255 | n/a | "'%s' does not exist or is not a file") |
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| 256 | n/a | |
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| 257 | n/a | def ensure_dirname(self, option): |
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| 258 | n/a | self._ensure_tested_string(option, os.path.isdir, |
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| 259 | n/a | "directory name", |
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| 260 | n/a | "'%s' does not exist or is not a directory") |
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| 261 | n/a | |
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| 262 | n/a | |
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| 263 | n/a | # -- Convenience methods for commands ------------------------------ |
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| 264 | n/a | |
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| 265 | n/a | def get_command_name(self): |
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| 266 | n/a | if hasattr(self, 'command_name'): |
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| 267 | n/a | return self.command_name |
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| 268 | n/a | else: |
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| 269 | n/a | return self.__class__.__name__ |
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| 270 | n/a | |
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| 271 | n/a | def set_undefined_options(self, src_cmd, *option_pairs): |
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| 272 | n/a | """Set the values of any "undefined" options from corresponding |
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| 273 | n/a | option values in some other command object. "Undefined" here means |
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| 274 | n/a | "is None", which is the convention used to indicate that an option |
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| 275 | n/a | has not been changed between 'initialize_options()' and |
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| 276 | n/a | 'finalize_options()'. Usually called from 'finalize_options()' for |
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| 277 | n/a | options that depend on some other command rather than another |
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| 278 | n/a | option of the same command. 'src_cmd' is the other command from |
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| 279 | n/a | which option values will be taken (a command object will be created |
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| 280 | n/a | for it if necessary); the remaining arguments are |
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| 281 | n/a | '(src_option,dst_option)' tuples which mean "take the value of |
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| 282 | n/a | 'src_option' in the 'src_cmd' command object, and copy it to |
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| 283 | n/a | 'dst_option' in the current command object". |
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| 284 | n/a | """ |
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| 285 | n/a | # Option_pairs: list of (src_option, dst_option) tuples |
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| 286 | n/a | src_cmd_obj = self.distribution.get_command_obj(src_cmd) |
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| 287 | n/a | src_cmd_obj.ensure_finalized() |
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| 288 | n/a | for (src_option, dst_option) in option_pairs: |
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| 289 | n/a | if getattr(self, dst_option) is None: |
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| 290 | n/a | setattr(self, dst_option, getattr(src_cmd_obj, src_option)) |
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| 291 | n/a | |
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| 292 | n/a | def get_finalized_command(self, command, create=1): |
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| 293 | n/a | """Wrapper around Distribution's 'get_command_obj()' method: find |
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| 294 | n/a | (create if necessary and 'create' is true) the command object for |
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| 295 | n/a | 'command', call its 'ensure_finalized()' method, and return the |
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| 296 | n/a | finalized command object. |
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| 297 | n/a | """ |
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| 298 | n/a | cmd_obj = self.distribution.get_command_obj(command, create) |
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| 299 | n/a | cmd_obj.ensure_finalized() |
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| 300 | n/a | return cmd_obj |
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| 301 | n/a | |
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| 302 | n/a | # XXX rename to 'get_reinitialized_command()'? (should do the |
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| 303 | n/a | # same in dist.py, if so) |
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| 304 | n/a | def reinitialize_command(self, command, reinit_subcommands=0): |
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| 305 | n/a | return self.distribution.reinitialize_command(command, |
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| 306 | n/a | reinit_subcommands) |
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| 307 | n/a | |
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| 308 | n/a | def run_command(self, command): |
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| 309 | n/a | """Run some other command: uses the 'run_command()' method of |
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| 310 | n/a | Distribution, which creates and finalizes the command object if |
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| 311 | n/a | necessary and then invokes its 'run()' method. |
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| 312 | n/a | """ |
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| 313 | n/a | self.distribution.run_command(command) |
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| 314 | n/a | |
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| 315 | n/a | def get_sub_commands(self): |
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| 316 | n/a | """Determine the sub-commands that are relevant in the current |
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| 317 | n/a | distribution (ie., that need to be run). This is based on the |
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| 318 | n/a | 'sub_commands' class attribute: each tuple in that list may include |
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| 319 | n/a | a method that we call to determine if the subcommand needs to be |
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| 320 | n/a | run for the current distribution. Return a list of command names. |
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| 321 | n/a | """ |
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| 322 | n/a | commands = [] |
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| 323 | n/a | for (cmd_name, method) in self.sub_commands: |
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| 324 | n/a | if method is None or method(self): |
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| 325 | n/a | commands.append(cmd_name) |
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| 326 | n/a | return commands |
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| 327 | n/a | |
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| 328 | n/a | |
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| 329 | n/a | # -- External world manipulation ----------------------------------- |
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| 330 | n/a | |
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| 331 | n/a | def warn(self, msg): |
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| 332 | n/a | log.warn("warning: %s: %s\n", self.get_command_name(), msg) |
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| 333 | n/a | |
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| 334 | n/a | def execute(self, func, args, msg=None, level=1): |
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| 335 | n/a | util.execute(func, args, msg, dry_run=self.dry_run) |
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| 336 | n/a | |
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| 337 | n/a | def mkpath(self, name, mode=0o777): |
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| 338 | n/a | dir_util.mkpath(name, mode, dry_run=self.dry_run) |
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| 339 | n/a | |
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| 340 | n/a | def copy_file(self, infile, outfile, preserve_mode=1, preserve_times=1, |
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| 341 | n/a | link=None, level=1): |
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| 342 | n/a | """Copy a file respecting verbose, dry-run and force flags. (The |
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| 343 | n/a | former two default to whatever is in the Distribution object, and |
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| 344 | n/a | the latter defaults to false for commands that don't define it.)""" |
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| 345 | n/a | return file_util.copy_file(infile, outfile, preserve_mode, |
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| 346 | n/a | preserve_times, not self.force, link, |
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| 347 | n/a | dry_run=self.dry_run) |
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| 348 | n/a | |
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| 349 | n/a | def copy_tree(self, infile, outfile, preserve_mode=1, preserve_times=1, |
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| 350 | n/a | preserve_symlinks=0, level=1): |
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| 351 | n/a | """Copy an entire directory tree respecting verbose, dry-run, |
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| 352 | n/a | and force flags. |
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| 353 | n/a | """ |
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| 354 | n/a | return dir_util.copy_tree(infile, outfile, preserve_mode, |
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| 355 | n/a | preserve_times, preserve_symlinks, |
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| 356 | n/a | not self.force, dry_run=self.dry_run) |
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| 357 | n/a | |
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| 358 | n/a | def move_file (self, src, dst, level=1): |
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| 359 | n/a | """Move a file respecting dry-run flag.""" |
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| 360 | n/a | return file_util.move_file(src, dst, dry_run=self.dry_run) |
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| 361 | n/a | |
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| 362 | n/a | def spawn(self, cmd, search_path=1, level=1): |
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| 363 | n/a | """Spawn an external command respecting dry-run flag.""" |
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| 364 | n/a | from distutils.spawn import spawn |
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| 365 | n/a | spawn(cmd, search_path, dry_run=self.dry_run) |
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| 366 | n/a | |
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| 367 | n/a | def make_archive(self, base_name, format, root_dir=None, base_dir=None, |
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| 368 | n/a | owner=None, group=None): |
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| 369 | n/a | return archive_util.make_archive(base_name, format, root_dir, base_dir, |
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| 370 | n/a | dry_run=self.dry_run, |
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| 371 | n/a | owner=owner, group=group) |
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| 372 | n/a | |
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| 373 | n/a | def make_file(self, infiles, outfile, func, args, |
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| 374 | n/a | exec_msg=None, skip_msg=None, level=1): |
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| 375 | n/a | """Special case of 'execute()' for operations that process one or |
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| 376 | n/a | more input files and generate one output file. Works just like |
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| 377 | n/a | 'execute()', except the operation is skipped and a different |
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| 378 | n/a | message printed if 'outfile' already exists and is newer than all |
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| 379 | n/a | files listed in 'infiles'. If the command defined 'self.force', |
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| 380 | n/a | and it is true, then the command is unconditionally run -- does no |
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| 381 | n/a | timestamp checks. |
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| 382 | n/a | """ |
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| 383 | n/a | if skip_msg is None: |
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| 384 | n/a | skip_msg = "skipping %s (inputs unchanged)" % outfile |
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| 385 | n/a | |
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| 386 | n/a | # Allow 'infiles' to be a single string |
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| 387 | n/a | if isinstance(infiles, str): |
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| 388 | n/a | infiles = (infiles,) |
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| 389 | n/a | elif not isinstance(infiles, (list, tuple)): |
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| 390 | n/a | raise TypeError( |
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| 391 | n/a | "'infiles' must be a string, or a list or tuple of strings") |
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| 392 | n/a | |
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| 393 | n/a | if exec_msg is None: |
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| 394 | n/a | exec_msg = "generating %s from %s" % (outfile, ', '.join(infiles)) |
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| 395 | n/a | |
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| 396 | n/a | # If 'outfile' must be regenerated (either because it doesn't |
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| 397 | n/a | # exist, is out-of-date, or the 'force' flag is true) then |
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| 398 | n/a | # perform the action that presumably regenerates it |
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| 399 | n/a | if self.force or dep_util.newer_group(infiles, outfile): |
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| 400 | n/a | self.execute(func, args, exec_msg, level) |
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| 401 | n/a | # Otherwise, print the "skip" message |
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| 402 | n/a | else: |
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| 403 | n/a | log.debug(skip_msg) |
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