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  <div class="section" id="creating-built-distributions">
<span id="built-dist"></span><h1>5. Creating Built Distributions<a class="headerlink" href="#creating-built-distributions" title="Permalink to this headline">¶</a></h1>
<p>A “built distribution” is what you’re probably used to thinking of either as a
“binary package” or an “installer” (depending on your background).  It’s not
necessarily binary, though, because it might contain only Python source code
and/or byte-code; and we don’t call it a package, because that word is already
spoken for in Python.  (And “installer” is a term specific to the world of
mainstream desktop systems.)</p>
<p>A built distribution is how you make life as easy as possible for installers of
your module distribution: for users of RPM-based Linux systems, it’s a binary
RPM; for Windows users, it’s an executable installer; for Debian-based Linux
users, it’s a Debian package; and so forth.  Obviously, no one person will be
able to create built distributions for every platform under the sun, so the
Distutils are designed to enable module developers to concentrate on their
specialty—writing code and creating source distributions—while an
intermediary species called <em>packagers</em> springs up to turn source distributions
into built distributions for as many platforms as there are packagers.</p>
<p>Of course, the module developer could be their own packager; or the packager could
be a volunteer “out there” somewhere who has access to a platform which the
original developer does not; or it could be software periodically grabbing new
source distributions and turning them into built distributions for as many
platforms as the software has access to.  Regardless of who they are, a packager
uses the setup script and the <strong class="command">bdist</strong> command family to generate built
distributions.</p>
<p>As a simple example, if I run the following command in the Distutils source
tree:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">bdist</span>
</pre></div>
</div>
<p>then the Distutils builds my module distribution (the Distutils itself in this
case), does a “fake” installation (also in the <code class="file docutils literal notranslate"><span class="pre">build</span></code> directory), and
creates the default type of built distribution for my platform.  The default
format for built distributions is a “dumb” tar file on Unix, and a simple
executable installer on Windows.  (That tar file is considered “dumb” because it
has to be unpacked in a specific location to work.)</p>
<p>Thus, the above command on a Unix system creates
<code class="file docutils literal notranslate"><span class="pre">Distutils-1.0.</span><em><span class="pre">plat</span></em><span class="pre">.tar.gz</span></code>; unpacking this tarball from the right place
installs the Distutils just as though you had downloaded the source distribution
and run <code class="docutils literal notranslate"><span class="pre">python</span> <span class="pre">setup.py</span> <span class="pre">install</span></code>.  (The “right place” is either the root of
the filesystem or  Python’s <code class="file docutils literal notranslate"><em><span class="pre">prefix</span></em></code> directory, depending on the options
given to the <strong class="command">bdist_dumb</strong> command; the default is to make dumb
distributions relative to <code class="file docutils literal notranslate"><em><span class="pre">prefix</span></em></code>.)</p>
<p>Obviously, for pure Python distributions, this isn’t any simpler than just
running <code class="docutils literal notranslate"><span class="pre">python</span> <span class="pre">setup.py</span> <span class="pre">install</span></code>—but for non-pure distributions, which
include extensions that would need to be compiled, it can mean the difference
between someone being able to use your extensions or not.  And creating “smart”
built distributions, such as an RPM package or an executable installer for
Windows, is far more convenient for users even if your distribution doesn’t
include any extensions.</p>
<p>The <strong class="command">bdist</strong> command has a <code class="xref std std-option docutils literal notranslate"><span class="pre">--formats</span></code> option, similar to the
<strong class="command">sdist</strong> command, which you can use to select the types of built
distribution to generate: for example,</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">bdist</span> <span class="o">--</span><span class="nb">format</span><span class="o">=</span><span class="nb">zip</span>
</pre></div>
</div>
<p>would, when run on a Unix system, create <code class="file docutils literal notranslate"><span class="pre">Distutils-1.0.</span><em><span class="pre">plat</span></em><span class="pre">.zip</span></code>—again, this archive would be unpacked from the root directory to install the
Distutils.</p>
<p>The available formats for built distributions are:</p>
<table border="1" class="docutils">
<colgroup>
<col width="25%" />
<col width="58%" />
<col width="17%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Format</th>
<th class="head">Description</th>
<th class="head">Notes</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">gztar</span></code></td>
<td>gzipped tar file
(<code class="file docutils literal notranslate"><span class="pre">.tar.gz</span></code>)</td>
<td>(1),(3)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">ztar</span></code></td>
<td>compressed tar file
(<code class="file docutils literal notranslate"><span class="pre">.tar.Z</span></code>)</td>
<td>(3)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">tar</span></code></td>
<td>tar file (<code class="file docutils literal notranslate"><span class="pre">.tar</span></code>)</td>
<td>(3)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">zip</span></code></td>
<td>zip file (<code class="file docutils literal notranslate"><span class="pre">.zip</span></code>)</td>
<td>(2),(4)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">rpm</span></code></td>
<td>RPM</td>
<td>(5)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">pkgtool</span></code></td>
<td>Solaris <strong class="program">pkgtool</strong></td>
<td>&#160;</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">sdux</span></code></td>
<td>HP-UX <strong class="program">swinstall</strong></td>
<td>&#160;</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">wininst</span></code></td>
<td>self-extracting ZIP file for
Windows</td>
<td>(4)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">msi</span></code></td>
<td>Microsoft Installer.</td>
<td>&#160;</td>
</tr>
</tbody>
</table>
<p>Notes:</p>
<ol class="arabic simple">
<li>default on Unix</li>
<li>default on Windows</li>
<li>requires external utilities: <strong class="program">tar</strong> and possibly one of <strong class="program">gzip</strong>,
<strong class="program">bzip2</strong>, or <strong class="program">compress</strong></li>
<li>requires either external <strong class="program">zip</strong> utility or <a class="reference internal" href="../library/zipfile.html#module-zipfile" title="zipfile: Read and write ZIP-format archive files."><code class="xref py py-mod docutils literal notranslate"><span class="pre">zipfile</span></code></a> module (part
of the standard Python library since Python 1.6)</li>
<li>requires external <strong class="program">rpm</strong> utility, version 3.0.4 or better (use <code class="docutils literal notranslate"><span class="pre">rpm</span>
<span class="pre">--version</span></code> to find out which version you have)</li>
</ol>
<p>You don’t have to use the <strong class="command">bdist</strong> command with the <code class="xref std std-option docutils literal notranslate"><span class="pre">--formats</span></code>
option; you can also use the command that directly implements the format you’re
interested in.  Some of these <strong class="command">bdist</strong> “sub-commands” actually generate
several similar formats; for instance, the <strong class="command">bdist_dumb</strong> command
generates all the “dumb” archive formats (<code class="docutils literal notranslate"><span class="pre">tar</span></code>, <code class="docutils literal notranslate"><span class="pre">ztar</span></code>, <code class="docutils literal notranslate"><span class="pre">gztar</span></code>, and
<code class="docutils literal notranslate"><span class="pre">zip</span></code>), and <strong class="command">bdist_rpm</strong> generates both binary and source RPMs.  The
<strong class="command">bdist</strong> sub-commands, and the formats generated by each, are:</p>
<table border="1" class="docutils">
<colgroup>
<col width="53%" />
<col width="47%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Command</th>
<th class="head">Formats</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td><strong class="command">bdist_dumb</strong></td>
<td>tar, ztar, gztar, zip</td>
</tr>
<tr class="row-odd"><td><strong class="command">bdist_rpm</strong></td>
<td>rpm, srpm</td>
</tr>
<tr class="row-even"><td><strong class="command">bdist_wininst</strong></td>
<td>wininst</td>
</tr>
<tr class="row-odd"><td><strong class="command">bdist_msi</strong></td>
<td>msi</td>
</tr>
</tbody>
</table>
<p>The following sections give details on the individual <strong class="command">bdist_*</strong>
commands.</p>
<div class="section" id="creating-dumb-built-distributions">
<span id="creating-dumb"></span><h2>5.1. Creating dumb built distributions<a class="headerlink" href="#creating-dumb-built-distributions" title="Permalink to this headline">¶</a></h2>
</div>
<div class="section" id="creating-rpm-packages">
<span id="creating-rpms"></span><h2>5.2. Creating RPM packages<a class="headerlink" href="#creating-rpm-packages" title="Permalink to this headline">¶</a></h2>
<p>The RPM format is used by many popular Linux distributions, including Red Hat,
SuSE, and Mandrake.  If one of these (or any of the other RPM-based Linux
distributions) is your usual environment, creating RPM packages for other users
of that same distribution is trivial. Depending on the complexity of your module
distribution and differences between Linux distributions, you may also be able
to create RPMs that work on different RPM-based distributions.</p>
<p>The usual way to create an RPM of your module distribution is to run the
<strong class="command">bdist_rpm</strong> command:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">bdist_rpm</span>
</pre></div>
</div>
<p>or the <strong class="command">bdist</strong> command with the <code class="xref std std-option docutils literal notranslate"><span class="pre">--format</span></code> option:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">bdist</span> <span class="o">--</span><span class="n">formats</span><span class="o">=</span><span class="n">rpm</span>
</pre></div>
</div>
<p>The former allows you to specify RPM-specific options; the latter allows  you to
easily specify multiple formats in one run.  If you need to do both, you can
explicitly specify multiple <strong class="command">bdist_*</strong> commands and their options:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">bdist_rpm</span> <span class="o">--</span><span class="n">packager</span><span class="o">=</span><span class="s2">&quot;John Doe &lt;jdoe@example.org&gt;&quot;</span> \
                <span class="n">bdist_wininst</span> <span class="o">--</span><span class="n">target</span><span class="o">-</span><span class="n">version</span><span class="o">=</span><span class="s2">&quot;2.0&quot;</span>
</pre></div>
</div>
<p>Creating RPM packages is driven by a <code class="file docutils literal notranslate"><span class="pre">.spec</span></code> file, much as using the
Distutils is driven by the setup script.  To make your life easier, the
<strong class="command">bdist_rpm</strong> command normally creates a <code class="file docutils literal notranslate"><span class="pre">.spec</span></code> file based on the
information you supply in the setup script, on the command line, and in any
Distutils configuration files.  Various options and sections in the
<code class="file docutils literal notranslate"><span class="pre">.spec</span></code> file are derived from options in the setup script as follows:</p>
<table border="1" class="docutils">
<colgroup>
<col width="48%" />
<col width="52%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">RPM <code class="file docutils literal notranslate"><span class="pre">.spec</span></code> file option or section</th>
<th class="head">Distutils setup script option</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>Name</td>
<td><code class="docutils literal notranslate"><span class="pre">name</span></code></td>
</tr>
<tr class="row-odd"><td>Summary (in preamble)</td>
<td><code class="docutils literal notranslate"><span class="pre">description</span></code></td>
</tr>
<tr class="row-even"><td>Version</td>
<td><code class="docutils literal notranslate"><span class="pre">version</span></code></td>
</tr>
<tr class="row-odd"><td>Vendor</td>
<td><code class="docutils literal notranslate"><span class="pre">author</span></code> and <code class="docutils literal notranslate"><span class="pre">author_email</span></code>,
or  — &amp; <code class="docutils literal notranslate"><span class="pre">maintainer</span></code> and
<code class="docutils literal notranslate"><span class="pre">maintainer_email</span></code></td>
</tr>
<tr class="row-even"><td>Copyright</td>
<td><code class="docutils literal notranslate"><span class="pre">license</span></code></td>
</tr>
<tr class="row-odd"><td>Url</td>
<td><code class="docutils literal notranslate"><span class="pre">url</span></code></td>
</tr>
<tr class="row-even"><td>%description (section)</td>
<td><code class="docutils literal notranslate"><span class="pre">long_description</span></code></td>
</tr>
</tbody>
</table>
<p>Additionally, there are many options in <code class="file docutils literal notranslate"><span class="pre">.spec</span></code> files that don’t have
corresponding options in the setup script.  Most of these are handled through
options to the <strong class="command">bdist_rpm</strong> command as follows:</p>
<table border="1" class="docutils">
<colgroup>
<col width="36%" />
<col width="34%" />
<col width="29%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">RPM <code class="file docutils literal notranslate"><span class="pre">.spec</span></code> file option
or section</th>
<th class="head"><strong class="command">bdist_rpm</strong> option</th>
<th class="head">default value</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>Release</td>
<td><code class="docutils literal notranslate"><span class="pre">release</span></code></td>
<td>“1”</td>
</tr>
<tr class="row-odd"><td>Group</td>
<td><code class="docutils literal notranslate"><span class="pre">group</span></code></td>
<td>“Development/Libraries”</td>
</tr>
<tr class="row-even"><td>Vendor</td>
<td><code class="docutils literal notranslate"><span class="pre">vendor</span></code></td>
<td>(see above)</td>
</tr>
<tr class="row-odd"><td>Packager</td>
<td><code class="docutils literal notranslate"><span class="pre">packager</span></code></td>
<td>(none)</td>
</tr>
<tr class="row-even"><td>Provides</td>
<td><code class="docutils literal notranslate"><span class="pre">provides</span></code></td>
<td>(none)</td>
</tr>
<tr class="row-odd"><td>Requires</td>
<td><code class="docutils literal notranslate"><span class="pre">requires</span></code></td>
<td>(none)</td>
</tr>
<tr class="row-even"><td>Conflicts</td>
<td><code class="docutils literal notranslate"><span class="pre">conflicts</span></code></td>
<td>(none)</td>
</tr>
<tr class="row-odd"><td>Obsoletes</td>
<td><code class="docutils literal notranslate"><span class="pre">obsoletes</span></code></td>
<td>(none)</td>
</tr>
<tr class="row-even"><td>Distribution</td>
<td><code class="docutils literal notranslate"><span class="pre">distribution_name</span></code></td>
<td>(none)</td>
</tr>
<tr class="row-odd"><td>BuildRequires</td>
<td><code class="docutils literal notranslate"><span class="pre">build_requires</span></code></td>
<td>(none)</td>
</tr>
<tr class="row-even"><td>Icon</td>
<td><code class="docutils literal notranslate"><span class="pre">icon</span></code></td>
<td>(none)</td>
</tr>
</tbody>
</table>
<p>Obviously, supplying even a few of these options on the command-line would be
tedious and error-prone, so it’s usually best to put them in the setup
configuration file, <code class="file docutils literal notranslate"><span class="pre">setup.cfg</span></code>—see section <a class="reference internal" href="configfile.html#setup-config"><span class="std std-ref">Writing the Setup Configuration File</span></a>.  If
you distribute or package many Python module distributions, you might want to
put options that apply to all of them in your personal Distutils configuration
file (<code class="file docutils literal notranslate"><span class="pre">~/.pydistutils.cfg</span></code>).  If you want to temporarily disable
this file, you can pass the –no-user-cfg option to setup.py.</p>
<p>There are three steps to building a binary RPM package, all of which are
handled automatically by the Distutils:</p>
<ol class="arabic simple">
<li>create a <code class="file docutils literal notranslate"><span class="pre">.spec</span></code> file, which describes the package (analogous  to the
Distutils setup script; in fact, much of the information in the  setup script
winds up in the <code class="file docutils literal notranslate"><span class="pre">.spec</span></code> file)</li>
<li>create the source RPM</li>
<li>create the “binary” RPM (which may or may not contain binary code, depending
on whether your module distribution contains Python extensions)</li>
</ol>
<p>Normally, RPM bundles the last two steps together; when you use the Distutils,
all three steps are typically bundled together.</p>
<p>If you wish, you can separate these three steps.  You can use the
<code class="xref std std-option docutils literal notranslate"><span class="pre">--spec-only</span></code> option to make <strong class="command">bdist_rpm</strong> just create the
<code class="file docutils literal notranslate"><span class="pre">.spec</span></code> file and exit; in this case, the <code class="file docutils literal notranslate"><span class="pre">.spec</span></code> file will be
written to the “distribution directory”—normally <code class="file docutils literal notranslate"><span class="pre">dist/</span></code>, but
customizable with the <code class="xref std std-option docutils literal notranslate"><span class="pre">--dist-dir</span></code> option.  (Normally, the <code class="file docutils literal notranslate"><span class="pre">.spec</span></code>
file winds up deep in the “build tree,” in a temporary directory created by
<strong class="command">bdist_rpm</strong>.)</p>
</div>
<div class="section" id="creating-windows-installers">
<span id="creating-wininst"></span><h2>5.3. Creating Windows Installers<a class="headerlink" href="#creating-windows-installers" title="Permalink to this headline">¶</a></h2>
<p>Executable installers are the natural format for binary distributions on
Windows.  They display a nice graphical user interface, display some information
about the module distribution to be installed taken from the metadata in the
setup script, let the user select a few options, and start or cancel the
installation.</p>
<p>Since the metadata is taken from the setup script, creating Windows installers
is usually as easy as running:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">bdist_wininst</span>
</pre></div>
</div>
<p>or the <strong class="command">bdist</strong> command with the <code class="xref std std-option docutils literal notranslate"><span class="pre">--formats</span></code> option:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">bdist</span> <span class="o">--</span><span class="n">formats</span><span class="o">=</span><span class="n">wininst</span>
</pre></div>
</div>
<p>If you have a pure module distribution (only containing pure Python modules and
packages), the resulting installer will be version independent and have a name
like <code class="file docutils literal notranslate"><span class="pre">foo-1.0.win32.exe</span></code>.  These installers can even be created on Unix
platforms or Mac OS X.</p>
<p>If you have a non-pure distribution, the extensions can only be created on a
Windows platform, and will be Python version dependent. The installer filename
will reflect this and now has the form <code class="file docutils literal notranslate"><span class="pre">foo-1.0.win32-py2.0.exe</span></code>.  You
have to create a separate installer for every Python version you want to
support.</p>
<p>The installer will try to compile pure modules into <a class="reference internal" href="../glossary.html#term-bytecode"><span class="xref std std-term">bytecode</span></a> after installation
on the target system in normal and optimizing mode.  If you don’t want this to
happen for some reason, you can run the <strong class="command">bdist_wininst</strong> command with
the <code class="xref std std-option docutils literal notranslate"><span class="pre">--no-target-compile</span></code> and/or the <code class="xref std std-option docutils literal notranslate"><span class="pre">--no-target-optimize</span></code>
option.</p>
<p>By default the installer will display the cool “Python Powered” logo when it is
run, but you can also supply your own 152x261 bitmap which must be a Windows
<code class="file docutils literal notranslate"><span class="pre">.bmp</span></code> file with the <code class="xref std std-option docutils literal notranslate"><span class="pre">--bitmap</span></code> option.</p>
<p>The installer will also display a large title on the desktop background window
when it is run, which is constructed from the name of your distribution and the
version number.  This can be changed to another text by using the
<code class="xref std std-option docutils literal notranslate"><span class="pre">--title</span></code> option.</p>
<p>The installer file will be written to the “distribution directory” — normally
<code class="file docutils literal notranslate"><span class="pre">dist/</span></code>, but customizable with the <code class="xref std std-option docutils literal notranslate"><span class="pre">--dist-dir</span></code> option.</p>
</div>
<div class="section" id="cross-compiling-on-windows">
<span id="cross-compile-windows"></span><h2>5.4. Cross-compiling on Windows<a class="headerlink" href="#cross-compiling-on-windows" title="Permalink to this headline">¶</a></h2>
<p>Starting with Python 2.6, distutils is capable of cross-compiling between
Windows platforms.  In practice, this means that with the correct tools
installed, you can use a 32bit version of Windows to create 64bit extensions
and vice-versa.</p>
<p>To build for an alternate platform, specify the <code class="xref std std-option docutils literal notranslate"><span class="pre">--plat-name</span></code> option
to the build command.  Valid values are currently ‘win32’, ‘win-amd64’ and
‘win-ia64’.  For example, on a 32bit version of Windows, you could execute:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">build</span> <span class="o">--</span><span class="n">plat</span><span class="o">-</span><span class="n">name</span><span class="o">=</span><span class="n">win</span><span class="o">-</span><span class="n">amd64</span>
</pre></div>
</div>
<p>to build a 64bit version of your extension.  The Windows Installers also
support this option, so the command:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">build</span> <span class="o">--</span><span class="n">plat</span><span class="o">-</span><span class="n">name</span><span class="o">=</span><span class="n">win</span><span class="o">-</span><span class="n">amd64</span> <span class="n">bdist_wininst</span>
</pre></div>
</div>
<p>would create a 64bit installation executable on your 32bit version of Windows.</p>
<p>To cross-compile, you must download the Python source code and cross-compile
Python itself for the platform you are targeting - it is not possible from a
binary installation of Python (as the .lib etc file for other platforms are
not included.)  In practice, this means the user of a 32 bit operating
system will need to use Visual Studio 2008 to open the
<code class="file docutils literal notranslate"><span class="pre">PCBuild/PCbuild.sln</span></code> solution in the Python source tree and build the
“x64” configuration of the ‘pythoncore’ project before cross-compiling
extensions is possible.</p>
<p>Note that by default, Visual Studio 2008 does not install 64bit compilers or
tools.  You may need to reexecute the Visual Studio setup process and select
these tools (using Control Panel-&gt;[Add/Remove] Programs is a convenient way to
check or modify your existing install.)</p>
<div class="section" id="the-postinstallation-script">
<span id="postinstallation-script"></span><h3>5.4.1. The Postinstallation script<a class="headerlink" href="#the-postinstallation-script" title="Permalink to this headline">¶</a></h3>
<p>Starting with Python 2.3, a postinstallation script can be specified with the
<code class="xref std std-option docutils literal notranslate"><span class="pre">--install-script</span></code> option.  The basename of the script must be
specified, and the script filename must also be listed in the scripts argument
to the setup function.</p>
<p>This script will be run at installation time on the target system after all the
files have been copied, with <code class="docutils literal notranslate"><span class="pre">argv[1]</span></code> set to <code class="xref std std-option docutils literal notranslate"><span class="pre">-install</span></code>, and again at
uninstallation time before the files are removed with <code class="docutils literal notranslate"><span class="pre">argv[1]</span></code> set to
<code class="xref std std-option docutils literal notranslate"><span class="pre">-remove</span></code>.</p>
<p>The installation script runs embedded in the windows installer, every output
(<code class="docutils literal notranslate"><span class="pre">sys.stdout</span></code>, <code class="docutils literal notranslate"><span class="pre">sys.stderr</span></code>) is redirected into a buffer and will be
displayed in the GUI after the script has finished.</p>
<p>Some functions especially useful in this context are available as additional
built-in functions in the installation script.</p>
<dl class="function">
<dt id="directory_created">
<code class="descname">directory_created</code><span class="sig-paren">(</span><em>path</em><span class="sig-paren">)</span><a class="headerlink" href="#directory_created" title="Permalink to this definition">¶</a></dt>
<dt id="file_created">
<code class="descname">file_created</code><span class="sig-paren">(</span><em>path</em><span class="sig-paren">)</span><a class="headerlink" href="#file_created" title="Permalink to this definition">¶</a></dt>
<dd><p>These functions should be called when a directory or file is created by the
postinstall script at installation time.  It will register <em>path</em> with the
uninstaller, so that it will be removed when the distribution is uninstalled.
To be safe, directories are only removed if they are empty.</p>
</dd></dl>

<dl class="function">
<dt id="get_special_folder_path">
<code class="descname">get_special_folder_path</code><span class="sig-paren">(</span><em>csidl_string</em><span class="sig-paren">)</span><a class="headerlink" href="#get_special_folder_path" title="Permalink to this definition">¶</a></dt>
<dd><p>This function can be used to retrieve special folder locations on Windows like
the Start Menu or the Desktop.  It returns the full path to the folder.
<em>csidl_string</em> must be one of the following strings:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="s2">&quot;CSIDL_APPDATA&quot;</span>

<span class="s2">&quot;CSIDL_COMMON_STARTMENU&quot;</span>
<span class="s2">&quot;CSIDL_STARTMENU&quot;</span>

<span class="s2">&quot;CSIDL_COMMON_DESKTOPDIRECTORY&quot;</span>
<span class="s2">&quot;CSIDL_DESKTOPDIRECTORY&quot;</span>

<span class="s2">&quot;CSIDL_COMMON_STARTUP&quot;</span>
<span class="s2">&quot;CSIDL_STARTUP&quot;</span>

<span class="s2">&quot;CSIDL_COMMON_PROGRAMS&quot;</span>
<span class="s2">&quot;CSIDL_PROGRAMS&quot;</span>

<span class="s2">&quot;CSIDL_FONTS&quot;</span>
</pre></div>
</div>
<p>If the folder cannot be retrieved, <a class="reference internal" href="../library/exceptions.html#exceptions.OSError" title="exceptions.OSError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OSError</span></code></a> is raised.</p>
<p>Which folders are available depends on the exact Windows version, and probably
also the configuration.  For details refer to Microsoft’s documentation of the
<code class="xref c c-func docutils literal notranslate"><span class="pre">SHGetSpecialFolderPath()</span></code> function.</p>
</dd></dl>

<dl class="function">
<dt id="create_shortcut">
<code class="descname">create_shortcut</code><span class="sig-paren">(</span><em>target</em>, <em>description</em>, <em>filename</em><span class="optional">[</span>, <em>arguments</em><span class="optional">[</span>, <em>workdir</em><span class="optional">[</span>, <em>iconpath</em><span class="optional">[</span>, <em>iconindex</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#create_shortcut" title="Permalink to this definition">¶</a></dt>
<dd><p>This function creates a shortcut. <em>target</em> is the path to the program to be
started by the shortcut. <em>description</em> is the description of the shortcut.
<em>filename</em> is the title of the shortcut that the user will see. <em>arguments</em>
specifies the command line arguments, if any. <em>workdir</em> is the working directory
for the program. <em>iconpath</em> is the file containing the icon for the shortcut,
and <em>iconindex</em> is the index of the icon in the file <em>iconpath</em>.  Again, for
details consult the Microsoft documentation for the <code class="xref py py-class docutils literal notranslate"><span class="pre">IShellLink</span></code>
interface.</p>
</dd></dl>

</div>
</div>
<div class="section" id="vista-user-access-control-uac">
<h2>5.5. Vista User Access Control (UAC)<a class="headerlink" href="#vista-user-access-control-uac" title="Permalink to this headline">¶</a></h2>
<p>Starting with Python 2.6, bdist_wininst supports a <code class="xref std std-option docutils literal notranslate"><span class="pre">--user-access-control</span></code>
option.  The default is ‘none’ (meaning no UAC handling is done), and other
valid values are ‘auto’ (meaning prompt for UAC elevation if Python was
installed for all users) and ‘force’ (meaning always prompt for elevation).</p>
</div>
</div>


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  <ul>
<li><a class="reference internal" href="#">5. Creating Built Distributions</a><ul>
<li><a class="reference internal" href="#creating-dumb-built-distributions">5.1. Creating dumb built distributions</a></li>
<li><a class="reference internal" href="#creating-rpm-packages">5.2. Creating RPM packages</a></li>
<li><a class="reference internal" href="#creating-windows-installers">5.3. Creating Windows Installers</a></li>
<li><a class="reference internal" href="#cross-compiling-on-windows">5.4. Cross-compiling on Windows</a><ul>
<li><a class="reference internal" href="#the-postinstallation-script">5.4.1. The Postinstallation script</a></li>
</ul>
</li>
<li><a class="reference internal" href="#vista-user-access-control-uac">5.5. Vista User Access Control (UAC)</a></li>
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