initial import of the packaging package in the standard library

Lib/packaging/command/clean.py

@@ -0,0 +1,76 @@
+"""Clean up temporary files created by the build command."""
+
+# Contributed by Bastian Kleineidam <calvin@cs.uni-sb.de>
+
+import os
+from shutil import rmtree
+from packaging.command.cmd import Command
+from packaging import logger
+
+class clean(Command):
+
+    description = "clean up temporary files from 'build' command"
+    user_options = [
+        ('build-base=', 'b',
+         "base build directory (default: 'build.build-base')"),
+        ('build-lib=', None,
+         "build directory for all modules (default: 'build.build-lib')"),
+        ('build-temp=', 't',
+         "temporary build directory (default: 'build.build-temp')"),
+        ('build-scripts=', None,
+         "build directory for scripts (default: 'build.build-scripts')"),
+        ('bdist-base=', None,
+         "temporary directory for built distributions"),
+        ('all', 'a',
+         "remove all build output, not just temporary by-products")
+    ]
+
+    boolean_options = ['all']
+
+    def initialize_options(self):
+        self.build_base = None
+        self.build_lib = None
+        self.build_temp = None
+        self.build_scripts = None
+        self.bdist_base = None
+        self.all = None
+
+    def finalize_options(self):
+        self.set_undefined_options('build', 'build_base', 'build_lib',
+                                   'build_scripts', 'build_temp')
+        self.set_undefined_options('bdist', 'bdist_base')
+
+    def run(self):
+        # remove the build/temp.<plat> directory (unless it's already
+        # gone)
+        if os.path.exists(self.build_temp):
+            if self.dry_run:
+                logger.info('removing %s', self.build_temp)
+            else:
+                rmtree(self.build_temp)
+        else:
+            logger.debug("'%s' does not exist -- can't clean it",
+                      self.build_temp)
+
+        if self.all:
+            # remove build directories
+            for directory in (self.build_lib,
+                              self.bdist_base,
+                              self.build_scripts):
+                if os.path.exists(directory):
+                    if self.dry_run:
+                        logger.info('removing %s', directory)
+                    else:
+                        rmtree(directory)
+                else:
+                    logger.warning("'%s' does not exist -- can't clean it",
+                                directory)
+
+        # just for the heck of it, try to remove the base build directory:
+        # we might have emptied it right now, but if not we don't care
+        if not self.dry_run:
+            try:
+                os.rmdir(self.build_base)
+                logger.info("removing '%s'", self.build_base)
+            except OSError:
+                pass