summaryrefslogtreecommitdiffstats
path: root/Doc/library/packaging.util.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Doc/library/packaging.util.rst')
-rw-r--r--Doc/library/packaging.util.rst149
1 files changed, 149 insertions, 0 deletions
diff --git a/Doc/library/packaging.util.rst b/Doc/library/packaging.util.rst
new file mode 100644
index 0000000..019f3e9
--- /dev/null
+++ b/Doc/library/packaging.util.rst
@@ -0,0 +1,149 @@
+:mod:`packaging.util` --- Miscellaneous utility functions
+=========================================================
+
+.. module:: packaging.util
+ :synopsis: Miscellaneous utility functions.
+
+
+This module contains various helpers for the other modules.
+
+.. XXX a number of functions are missing, but the module may be split first
+ (it's ginormous right now, some things could go to compat for example)
+
+.. function:: get_platform()
+
+ Return a string that identifies the current platform. This is used mainly to
+ distinguish platform-specific build directories and platform-specific built
+ distributions. Typically includes the OS name and version and the
+ architecture (as supplied by 'os.uname()'), although the exact information
+ included depends on the OS; e.g. for IRIX the architecture isn't particularly
+ important (IRIX only runs on SGI hardware), but for Linux the kernel version
+ isn't particularly important.
+
+ Examples of returned values:
+
+ * ``linux-i586``
+ * ``linux-alpha``
+ * ``solaris-2.6-sun4u``
+ * ``irix-5.3``
+ * ``irix64-6.2``
+
+ For non-POSIX platforms, currently just returns ``sys.platform``.
+
+ For Mac OS X systems the OS version reflects the minimal version on which
+ binaries will run (that is, the value of ``MACOSX_DEPLOYMENT_TARGET``
+ during the build of Python), not the OS version of the current system.
+
+ For universal binary builds on Mac OS X the architecture value reflects
+ the univeral binary status instead of the architecture of the current
+ processor. For 32-bit universal binaries the architecture is ``fat``,
+ for 64-bit universal binaries the architecture is ``fat64``, and
+ for 4-way universal binaries the architecture is ``universal``. Starting
+ from Python 2.7 and Python 3.2 the architecture ``fat3`` is used for
+ a 3-way universal build (ppc, i386, x86_64) and ``intel`` is used for
+ a univeral build with the i386 and x86_64 architectures
+
+ Examples of returned values on Mac OS X:
+
+ * ``macosx-10.3-ppc``
+
+ * ``macosx-10.3-fat``
+
+ * ``macosx-10.5-universal``
+
+ * ``macosx-10.6-intel``
+
+ .. XXX reinvention of platform module?
+
+
+.. function:: convert_path(pathname)
+
+ Return 'pathname' as a name that will work on the native filesystem, i.e.
+ split it on '/' and put it back together again using the current directory
+ separator. Needed because filenames in the setup script are always supplied
+ in Unix style, and have to be converted to the local convention before we
+ can actually use them in the filesystem. Raises :exc:`ValueError` on
+ non-Unix-ish systems if *pathname* either starts or ends with a slash.
+
+
+.. function:: change_root(new_root, pathname)
+
+ Return *pathname* with *new_root* prepended. If *pathname* is relative, this
+ is equivalent to ``os.path.join(new_root,pathname)`` Otherwise, it requires
+ making *pathname* relative and then joining the two, which is tricky on
+ DOS/Windows.
+
+
+.. function:: check_environ()
+
+ Ensure that 'os.environ' has all the environment variables we guarantee that
+ users can use in config files, command-line options, etc. Currently this
+ includes:
+
+ * :envvar:`HOME` - user's home directory (Unix only)
+ * :envvar:`PLAT` - description of the current platform, including hardware
+ and OS (see :func:`get_platform`)
+
+
+.. function:: find_executable(executable, path=None)
+
+ Search the path for a given executable name.
+
+
+.. function:: execute(func, args[, msg=None, verbose=0, dry_run=0])
+
+ Perform some action that affects the outside world (for instance, writing to
+ the filesystem). Such actions are special because they are disabled by the
+ *dry_run* flag. This method takes care of all that bureaucracy for you;
+ all you have to do is supply the function to call and an argument tuple for
+ it (to embody the "external action" being performed), and an optional message
+ to print.
+
+
+.. function:: newer(source, target)
+
+ Return true if *source* exists and is more recently modified than *target*,
+ or if *source* exists and *target* doesn't. Return false if both exist and
+ *target* is the same age or newer than *source*. Raise
+ :exc:`PackagingFileError` if *source* does not exist.
+
+
+.. function:: strtobool(val)
+
+ Convert a string representation of truth to true (1) or false (0).
+
+ True values are ``y``, ``yes``, ``t``, ``true``, ``on`` and ``1``; false
+ values are ``n``, ``no``, ``f``, ``false``, ``off`` and ``0``. Raises
+ :exc:`ValueError` if *val* is anything else.
+
+.. TODO Add :term: markup to bytecode when merging into the stdlib
+
+.. function:: byte_compile(py_files[, optimize=0, force=0, prefix=None, base_dir=None, verbose=1, dry_run=0, direct=None])
+
+ Byte-compile a collection of Python source files to either :file:`.pyc` or
+ :file:`.pyo` files in the same directory. *py_files* is a list of files to
+ compile; any files that don't end in :file:`.py` are silently skipped.
+ *optimize* must be one of the following:
+
+ * ``0`` - don't optimize (generate :file:`.pyc`)
+ * ``1`` - normal optimization (like ``python -O``)
+ * ``2`` - extra optimization (like ``python -OO``)
+
+ If *force* is true, all files are recompiled regardless of timestamps.
+
+ The source filename encoded in each bytecode file defaults to the filenames
+ listed in *py_files*; you can modify these with *prefix* and *basedir*.
+ *prefix* is a string that will be stripped off of each source filename, and
+ *base_dir* is a directory name that will be prepended (after *prefix* is
+ stripped). You can supply either or both (or neither) of *prefix* and
+ *base_dir*, as you wish.
+
+ If *dry_run* is true, doesn't actually do anything that would affect the
+ filesystem.
+
+ Byte-compilation is either done directly in this interpreter process with the
+ standard :mod:`py_compile` module, or indirectly by writing a temporary
+ script and executing it. Normally, you should let :func:`byte_compile`
+ figure out to use direct compilation or not (see the source for details).
+ The *direct* flag is used by the script generated in indirect mode; unless
+ you know what you're doing, leave it set to ``None``.