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81 lines
3.3 KiB
ReStructuredText
.. _jar_manifests:
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=============
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JAR Manifests
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=============
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JAR Manifests are plaintext files in the tree that are used to package chrome
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files into the correct JARs, and create
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`Chrome Registration <https://developer.mozilla.org/en-US/docs/Chrome_Registration>`_
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manifests. JAR Manifests are named ``jar.mn``.
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``jar.mn`` files are automatically processed by the build system when building a
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source directory that contains one. The ``jar``.mn is run through the
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:ref:`preprocessor` before being passed to the manifest processor. In order to
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have ``@variables@`` expanded (such as ``@AB_CD@``) throughout the file, add
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the line ``#filter substitution`` at the top of your ``jar.mn`` file.
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The format of a jar.mn is fairly simple; it consists of a heading specifying
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which JAR file is being packaged, followed by indented lines listing files and
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chrome registration instructions.
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To see a simple ``jar.mn`` file at work, see ``toolkit/profile/jar.mn``. A much
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more complex ``jar.mn`` is at ``toolkit/locales/jar.mn``.
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Shipping Chrome Files
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=====================
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To ship chrome files in a JAR, an indented line indicates a file to be packaged::
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<jarfile>.jar:
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path/in/jar/file_name.xul (source/tree/location/file_name.xul)
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The source tree location may also be an *absolute* path (taken from the
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top of the source tree::
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path/in/jar/file_name.xul (/path/in/sourcetree/file_name.xul)
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An asterisk marker (``*``) at the beginning of the line indicates that the
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file should be processed by the :ref:`preprocessor` before being packaged::
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* path/in/jar/preprocessed.xul (source/tree/location/file_name.xul)
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A plus marker (``+``) at the beginning of the line indicates that the file
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should replace an existing file, even if the source file's timestamp isn't
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newer than the existing file::
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+ path/in/jar/file_name.xul (source/tree/location/my_file_name.xul)
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Preprocessed files always replace existing files, to ensure that changes in
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``#expand`` or ``#include`` directives are picked up, so ``+`` and ``*`` are
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equivalent.
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There is a special source-directory format for localized files (note the
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percent sign in the source file location): this format reads ``localized.dtd``
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from the ``en-US`` directory if building an English version, and reads the
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file from the alternate localization source tree
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``/l10n/<locale>/path/localized.dtd`` if building a localized version::
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locale/path/localized.dtd (%localized/path/localized.dtd)
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Register Chrome
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===============
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`Chrome Registration <https://developer.mozilla.org/en-US/docs/Chrome_Registration>`_
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instructions are marked with a percent sign (``%``) at the beginning of the
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line, and must be part of the definition of a JAR file. Any additional percents
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signs are replaced with an appropriate relative URL of the JAR file being
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packaged::
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% content global %path/in/jar/
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% overlay chrome://blah/content/blah.xul chrome://foo/content/overlay.xul
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There are two possible locations for a manifest file. If the chrome is being
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built into a standalone application, the ``jar.mn`` processor creates a
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``<jarfilename>.manifest`` next to the JAR file itself. This is the default
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behavior.
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If the build specifies ``USE_EXTENSION_MANIFEST = 1``, the ``jar.mn`` processor
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creates a single ``chrome.manifest`` file suitable for registering chrome as
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an extension.
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