Doc/library/msilib.rst

:mod:`msilib` --- Read and write Microsoft Installer files
==========================================================

.. module:: msilib
   :platform: Windows
   :synopsis: Creation of Microsoft Installer files, and CAB files.

.. moduleauthor:: Martin v. Löwis <martin@v.loewis.de>
.. sectionauthor:: Martin v. Löwis <martin@v.loewis.de>

**Source code:** :source:`Lib/msilib/__init__.py`

.. index:: single: msi

--------------

The :mod:`msilib` supports the creation of Microsoft Installer (``.msi``) files.
Because these files often contain an embedded "cabinet" file (``.cab``), it also
exposes an API to create CAB files. Support for reading ``.cab`` files is
currently not implemented; read support for the ``.msi`` database is possible.

This package aims to provide complete access to all tables in an ``.msi`` file,
therefore, it is a fairly low-level API. Two primary applications of this
package are the :mod:`distutils` command ``bdist_msi``, and the creation of
Python installer package itself (although that currently uses a different
version of ``msilib``).

The package contents can be roughly split into four parts: low-level CAB
routines, low-level MSI routines, higher-level MSI routines, and standard table
structures.


.. function:: FCICreate(cabname, files)

   Create a new CAB file named *cabname*. *files* must be a list of tuples, each
   containing the name of the file on disk, and the name of the file inside the CAB
   file.

   The files are added to the CAB file in the order they appear in the list. All
   files are added into a single CAB file, using the MSZIP compression algorithm.

   Callbacks to Python for the various steps of MSI creation are currently not
   exposed.


.. function:: UuidCreate()

   Return the string representation of a new unique identifier. This wraps the
   Windows API functions :c:func:`UuidCreate` and :c:func:`UuidToString`.


.. function:: OpenDatabase(path, persist)

   Return a new database object by calling MsiOpenDatabase.   *path* is the file
   name of the MSI file; *persist* can be one of the constants
   ``MSIDBOPEN_CREATEDIRECT``, ``MSIDBOPEN_CREATE``, ``MSIDBOPEN_DIRECT``,
   ``MSIDBOPEN_READONLY``, or ``MSIDBOPEN_TRANSACT``, and may include the flag
   ``MSIDBOPEN_PATCHFILE``. See the Microsoft documentation for the meaning of
   these flags; depending on the flags, an existing database is opened, or a new
   one created.


.. function:: CreateRecord(count)

   Return a new record object by calling :c:func:`MSICreateRecord`. *count* is the
   number of fields of the record.


.. function:: init_database(name, schema, ProductName, ProductCode, ProductVersion, Manufacturer)

   Create and return a new database *name*, initialize it with *schema*, and set
   the properties *ProductName*, *ProductCode*, *ProductVersion*, and
   *Manufacturer*.

   *schema* must be a module object containing ``tables`` and
   ``_Validation_records`` attributes; typically, :mod:`msilib.schema` should be
   used.

   The database will contain just the schema and the validation records when this
   function returns.


.. function:: add_data(database, table, records)

   Add all *records* to the table named *table* in *database*.

   The *table* argument must be one of the predefined tables in the MSI schema,
   e.g. ``'Feature'``, ``'File'``, ``'Component'``, ``'Dialog'``, ``'Control'``,
   etc.

   *records* should be a list of tuples, each one containing all fields of a
   record according to the schema of the table.  For optional fields,
   ``None`` can be passed.

   Field values can be ints, strings, or instances of the Binary class.


.. class:: Binary(filename)

   Represents entries in the Binary table; inserting such an object using
   :func:`add_data` reads the file named *filename* into the table.


.. function:: add_tables(database, module)

   Add all table content from *module* to *database*. *module* must contain an
   attribute *tables* listing all tables for which content should be added, and one
   attribute per table that has the actual content.

   This is typically used to install the sequence tables.


.. function:: add_stream(database, name, path)

   Add the file *path* into the ``_Stream`` table of *database*, with the stream
   name *name*.


.. function:: gen_uuid()

   Return a new UUID, in the format that MSI typically requires (i.e. in curly
   braces, and with all hexdigits in upper-case).


.. seealso::

   `FCICreate <https://msdn.microsoft.com/en-us/library/bb432265.aspx>`_
   `UuidCreate <https://msdn.microsoft.com/en-us/library/windows/desktop/aa379205.aspx>`_
   `UuidToString <https://msdn.microsoft.com/en-us/library/windows/desktop/aa379352.aspx>`_

.. _database-objects:

Database Objects
----------------


.. method:: Database.OpenView(sql)

   Return a view object, by calling :c:func:`MSIDatabaseOpenView`. *sql* is the SQL
   statement to execute.


.. method:: Database.Commit()

   Commit the changes pending in the current transaction, by calling
   :c:func:`MSIDatabaseCommit`.


.. method:: Database.GetSummaryInformation(count)

   Return a new summary information object, by calling
   :c:func:`MsiGetSummaryInformation`.  *count* is the maximum number of updated
   values.

.. method:: Database.Close()

   Close the database object, through :c:func:`MsiCloseHandle`.

   .. versionadded:: 3.7

.. seealso::

   `MSIDatabaseOpenView <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370082.aspx>`_
   `MSIDatabaseCommit <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370075.aspx>`_
   `MSIGetSummaryInformation <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370301.aspx>`_
   `MsiCloseHandle <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370067.aspx>`_

.. _view-objects:

View Objects
------------


.. method:: View.Execute(params)

   Execute the SQL query of the view, through :c:func:`MSIViewExecute`. If
   *params* is not ``None``, it is a record describing actual values of the
   parameter tokens in the query.


.. method:: View.GetColumnInfo(kind)

   Return a record describing the columns of the view, through calling
   :c:func:`MsiViewGetColumnInfo`. *kind* can be either ``MSICOLINFO_NAMES`` or
   ``MSICOLINFO_TYPES``.


.. method:: View.Fetch()

   Return a result record of the query, through calling :c:func:`MsiViewFetch`.


.. method:: View.Modify(kind, data)

   Modify the view, by calling :c:func:`MsiViewModify`. *kind* can be one of
   ``MSIMODIFY_SEEK``, ``MSIMODIFY_REFRESH``, ``MSIMODIFY_INSERT``,
   ``MSIMODIFY_UPDATE``, ``MSIMODIFY_ASSIGN``, ``MSIMODIFY_REPLACE``,
   ``MSIMODIFY_MERGE``, ``MSIMODIFY_DELETE``, ``MSIMODIFY_INSERT_TEMPORARY``,
   ``MSIMODIFY_VALIDATE``, ``MSIMODIFY_VALIDATE_NEW``,
   ``MSIMODIFY_VALIDATE_FIELD``, or ``MSIMODIFY_VALIDATE_DELETE``.

   *data* must be a record describing the new data.


.. method:: View.Close()

   Close the view, through :c:func:`MsiViewClose`.


.. seealso::

   `MsiViewExecute <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370513.aspx>`_
   `MSIViewGetColumnInfo <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370516.aspx>`_
   `MsiViewFetch <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370514.aspx>`_
   `MsiViewModify <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370519.aspx>`_
   `MsiViewClose <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370510.aspx>`_

.. _summary-objects:

Summary Information Objects
---------------------------


.. method:: SummaryInformation.GetProperty(field)

   Return a property of the summary, through :c:func:`MsiSummaryInfoGetProperty`.
   *field* is the name of the property, and can be one of the constants
   ``PID_CODEPAGE``, ``PID_TITLE``, ``PID_SUBJECT``, ``PID_AUTHOR``,
   ``PID_KEYWORDS``, ``PID_COMMENTS``, ``PID_TEMPLATE``, ``PID_LASTAUTHOR``,
   ``PID_REVNUMBER``, ``PID_LASTPRINTED``, ``PID_CREATE_DTM``,
   ``PID_LASTSAVE_DTM``, ``PID_PAGECOUNT``, ``PID_WORDCOUNT``, ``PID_CHARCOUNT``,
   ``PID_APPNAME``, or ``PID_SECURITY``.


.. method:: SummaryInformation.GetPropertyCount()

   Return the number of summary properties, through
   :c:func:`MsiSummaryInfoGetPropertyCount`.


.. method:: SummaryInformation.SetProperty(field, value)

   Set a property through :c:func:`MsiSummaryInfoSetProperty`. *field* can have the
   same values as in :meth:`GetProperty`, *value* is the new value of the property.
   Possible value types are integer and string.


.. method:: SummaryInformation.Persist()

   Write the modified properties to the summary information stream, using
   :c:func:`MsiSummaryInfoPersist`.


.. seealso::

   `MsiSummaryInfoGetProperty <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370409.aspx>`_
   `MsiSummaryInfoGetPropertyCount <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370488.aspx>`_
   `MsiSummaryInfoSetProperty <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370491.aspx>`_
   `MsiSummaryInfoPersist <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370490.aspx>`_

.. _record-objects:

Record Objects
--------------


.. method:: Record.GetFieldCount()

   Return the number of fields of the record, through
   :c:func:`MsiRecordGetFieldCount`.


.. method:: Record.GetInteger(field)

   Return the value of *field* as an integer where possible.  *field* must
   be an integer.


.. method:: Record.GetString(field)

   Return the value of *field* as a string where possible.  *field* must
   be an integer.


.. method:: Record.SetString(field, value)

   Set *field* to *value* through :c:func:`MsiRecordSetString`. *field* must be an
   integer; *value* a string.


.. method:: Record.SetStream(field, value)

   Set *field* to the contents of the file named *value*, through
   :c:func:`MsiRecordSetStream`. *field* must be an integer; *value* a string.


.. method:: Record.SetInteger(field, value)

   Set *field* to *value* through :c:func:`MsiRecordSetInteger`. Both *field* and
   *value* must be an integer.


.. method:: Record.ClearData()

   Set all fields of the record to 0, through :c:func:`MsiRecordClearData`.


.. seealso::

   `MsiRecordGetFieldCount <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370366.aspx>`_
   `MsiRecordSetString <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370373.aspx>`_
   `MsiRecordSetStream <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370372.aspx>`_
   `MsiRecordSetInteger <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370371.aspx>`_
   `MsiRecordClearData <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370364.aspx>`_

.. _msi-errors:

Errors
------

All wrappers around MSI functions raise :exc:`MSIError`; the string inside the
exception will contain more detail.


.. _cab:

CAB Objects
-----------


.. class:: CAB(name)

   The class :class:`CAB` represents a CAB file. During MSI construction, files
   will be added simultaneously to the ``Files`` table, and to a CAB file. Then,
   when all files have been added, the CAB file can be written, then added to the
   MSI file.

   *name* is the name of the CAB file in the MSI file.


   .. method:: append(full, file, logical)

      Add the file with the pathname *full* to the CAB file, under the name
      *logical*.  If there is already a file named *logical*, a new file name is
      created.

      Return the index of the file in the CAB file, and the new name of the file
      inside the CAB file.


   .. method:: commit(database)

      Generate a CAB file, add it as a stream to the MSI file, put it into the
      ``Media`` table, and remove the generated file from the disk.


.. _msi-directory:

Directory Objects
-----------------


.. class:: Directory(database, cab, basedir, physical,  logical, default, [componentflags])

   Create a new directory in the Directory table. There is a current component at
   each point in time for the directory, which is either explicitly created through
   :meth:`start_component`, or implicitly when files are added for the first time.
   Files are added into the current component, and into the cab file.  To create a
   directory, a base directory object needs to be specified (can be ``None``), the
   path to the physical directory, and a logical directory name.  *default*
   specifies the DefaultDir slot in the directory table. *componentflags* specifies
   the default flags that new components get.


   .. method:: start_component(component=None, feature=None, flags=None, keyfile=None, uuid=None)

      Add an entry to the Component table, and make this component the current
      component for this directory. If no component name is given, the directory
      name is used. If no *feature* is given, the current feature is used. If no
      *flags* are given, the directory's default flags are used. If no *keyfile*
      is given, the KeyPath is left null in the Component table.


   .. method:: add_file(file, src=None, version=None, language=None)

      Add a file to the current component of the directory, starting a new one
      if there is no current component. By default, the file name in the source
      and the file table will be identical. If the *src* file is specified, it
      is interpreted relative to the current directory. Optionally, a *version*
      and a *language* can be specified for the entry in the File table.


   .. method:: glob(pattern, exclude=None)

      Add a list of files to the current component as specified in the glob
      pattern.  Individual files can be excluded in the *exclude* list.


   .. method:: remove_pyc()

      Remove ``.pyc`` files on uninstall.


.. seealso::

   `Directory Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368295.aspx>`_
   `File Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368596.aspx>`_
   `Component Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368007.aspx>`_
   `FeatureComponents Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368579.aspx>`_

.. _features:

Features
--------


.. class:: Feature(db, id, title, desc, display, level=1, parent=None, directory=None,  attributes=0)

   Add a new record to the ``Feature`` table, using the values *id*, *parent.id*,
   *title*, *desc*, *display*, *level*, *directory*, and *attributes*. The
   resulting feature object can be passed to the :meth:`start_component` method of
   :class:`Directory`.


   .. method:: set_current()

      Make this feature the current feature of :mod:`msilib`. New components are
      automatically added to the default feature, unless a feature is explicitly
      specified.


.. seealso::

   `Feature Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368585.aspx>`_

.. _msi-gui:

GUI classes
-----------

:mod:`msilib` provides several classes that wrap the GUI tables in an MSI
database. However, no standard user interface is provided; use
:mod:`~distutils.command.bdist_msi` to create MSI files with a user-interface
for installing Python packages.


.. class:: Control(dlg, name)

   Base class of the dialog controls. *dlg* is the dialog object the control
   belongs to, and *name* is the control's name.


   .. method:: event(event, argument, condition=1, ordering=None)

      Make an entry into the ``ControlEvent`` table for this control.


   .. method:: mapping(event, attribute)

      Make an entry into the ``EventMapping`` table for this control.


   .. method:: condition(action, condition)

      Make an entry into the ``ControlCondition`` table for this control.


.. class:: RadioButtonGroup(dlg, name, property)

   Create a radio button control named *name*. *property* is the installer property
   that gets set when a radio button is selected.


   .. method:: add(name, x, y, width, height, text, value=None)

      Add a radio button named *name* to the group, at the coordinates *x*, *y*,
      *width*, *height*, and with the label *text*. If *value* is ``None``, it
      defaults to *name*.


.. class:: Dialog(db, name, x, y, w, h, attr, title, first,  default, cancel)

   Return a new :class:`Dialog` object. An entry in the ``Dialog`` table is made,
   with the specified coordinates, dialog attributes, title, name of the first,
   default, and cancel controls.


   .. method:: control(name, type, x, y, width, height,  attributes, property, text, control_next, help)

      Return a new :class:`Control` object. An entry in the ``Control`` table is
      made with the specified parameters.

      This is a generic method; for specific types, specialized methods are
      provided.


   .. method:: text(name, x, y, width, height, attributes, text)

      Add and return a ``Text`` control.


   .. method:: bitmap(name, x, y, width, height, text)

      Add and return a ``Bitmap`` control.


   .. method:: line(name, x, y, width, height)

      Add and return a ``Line`` control.


   .. method:: pushbutton(name, x, y, width, height, attributes,  text, next_control)

      Add and return a ``PushButton`` control.


   .. method:: radiogroup(name, x, y, width, height,  attributes, property, text, next_control)

      Add and return a ``RadioButtonGroup`` control.


   .. method:: checkbox(name, x, y, width, height,  attributes, property, text, next_control)

      Add and return a ``CheckBox`` control.


.. seealso::

   `Dialog Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368286.aspx>`_
   `Control Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368044.aspx>`_
   `Control Types <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368039.aspx>`_
   `ControlCondition Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368035.aspx>`_
   `ControlEvent Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368037.aspx>`_
   `EventMapping Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa368559.aspx>`_
   `RadioButton Table <https://msdn.microsoft.com/en-us/library/windows/desktop/aa370962.aspx>`_

.. _msi-tables:

Precomputed tables
------------------

:mod:`msilib` provides a few subpackages that contain only schema and table
definitions. Currently, these definitions are based on MSI version 2.0.


.. data:: schema

   This is the standard MSI schema for MSI 2.0, with the *tables* variable
   providing a list of table definitions, and *_Validation_records* providing the
   data for MSI validation.


.. data:: sequence

   This module contains table contents for the standard sequence tables:
   *AdminExecuteSequence*, *AdminUISequence*, *AdvtExecuteSequence*,
   *InstallExecuteSequence*, and *InstallUISequence*.


.. data:: text

   This module contains definitions for the UIText and ActionText tables, for the
   standard installer actions.