setup: install translation files as package data

Remove the `install_package_data' subclass of `install_data' and use
the `package_data' functionality provided by distutils instead. As
package data must be located within the package directory, the data
files are now generated in the build directory.

To simplify the functionality of this change, the top-level `doc' and
`templates' directories have been moved into the `mercurial' package
directory.

setup.py

@@ -165,12 +165,6 b' try:'
 except ImportError:
     version = 'unknown'
 
-class install_package_data(install_data):
-    def finalize_options(self):
-        self.set_undefined_options('install',
-                                   ('install_lib', 'install_dir'))
-        install_data.finalize_options(self)
-
 class build_mo(build):
 
     description = "build translations (.mo files)"
@@ -193,16 +187,17 b' class build_mo(build):'
             pofile = join(podir, po)
             modir = join('locale', po[:-3], 'LC_MESSAGES')
             mofile = join(modir, 'hg.mo')
-            cmd = ['msgfmt', '-v', '-o', mofile, pofile]
+            mobuildfile = join('mercurial', mofile)
+            cmd = ['msgfmt', '-v', '-o', mobuildfile, pofile]
             if sys.platform != 'sunos5':
                 # msgfmt on Solaris does not know about -c
                 cmd.append('-c')
-            self.mkpath(modir)
-            self.make_file([pofile], mofile, spawn, (cmd,))
-            self.distribution.data_files.append((join('mercurial', modir),
-                                                 [mofile]))
+            self.mkpath(join('mercurial', modir))
+            self.make_file([pofile], mobuildfile, spawn, (cmd,))
 
-build.sub_commands.append(('build_mo', None))
+# Insert build_mo first so that files in mercurial/locale/ are found
+# when build_py is run next.
+build.sub_commands.insert(0, ('build_mo', None))
 
 Distribution.pure = 0
 Distribution.global_options.append(('pure', None, "use pure (slow) Python "
@@ -230,8 +225,7 b' class hg_build_py(build_py):'
             else:
                 yield module
 
-cmdclass = {'install_data': install_package_data,
-            'build_mo': build_mo,
+cmdclass = {'build_mo': build_mo,
             'build_py': hg_build_py}
 
 ext_modules=[
@@ -255,13 +249,21 b" if sys.platform == 'linux2' and os.uname"
                                      ['hgext/inotify/linux/_inotify.c']))
         packages.extend(['hgext.inotify', 'hgext.inotify.linux'])
 
+packagedata = {'mercurial': ['locale/*/LC_MESSAGES/hg.mo',
+                             'help/*.txt']}
+
+def ordinarypath(p):
+    return p and p[0] != '.' and p[-1] != '~'
+
+for root in ('templates', ):
+    for curdir, dirs, files in os.walk(os.path.join('mercurial', root)):
+        curdir = curdir.split(os.sep, 1)[1]
+        dirs[:] = filter(ordinarypath, dirs)
+        for f in filter(ordinarypath, files):
+            f = os.path.join(curdir, f)
+            packagedata['mercurial'].append(f)
+
 datafiles = []
-for root in ('templates', 'help'):
-    for dir, dirs, files in os.walk(root):
-        dirs[:] = [x for x in dirs if not x.startswith('.')]
-        files = [x for x in files if not x.startswith('.')]
-        datafiles.append((os.path.join('mercurial', dir),
-                          [os.path.join(dir, file_) for file_ in files]))
 
 setup(name='mercurial',
       version=version,
@@ -274,6 +276,7 b" setup(name='mercurial',"
       packages=packages,
       ext_modules=ext_modules,
       data_files=datafiles,
+      package_data=packagedata,
       cmdclass=cmdclass,
       options=dict(py2exe=dict(packages=['hgext', 'email']),
                    bdist_mpkg=dict(zipdist=True,