diff --git a/MAINTAINERS b/MAINTAINERS index b406fb20c0..8e8ca270c4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4175,6 +4175,7 @@ F: docs/conf.py F: docs/*/conf.py F: docs/sphinx/ F: docs/_templates/ +F: docs/devel/docs.rst Miscellaneous ------------- diff --git a/docs/devel/docs.rst b/docs/devel/docs.rst new file mode 100644 index 0000000000..7da067905b --- /dev/null +++ b/docs/devel/docs.rst @@ -0,0 +1,60 @@ + +================== +QEMU Documentation +================== + +QEMU's documentation is written in reStructuredText format and +built using the Sphinx documentation generator. We generate both +the HTML manual and the manpages from the some documentation sources. + +hxtool and .hx files +-------------------- + +The documentation for QEMU command line options and Human Monitor Protocol +(HMP) commands is written in files with the ``.hx`` suffix. These +are processed in two ways: + + * ``scripts/hxtool`` creates C header files from them, which are included + in QEMU to do things like handle the ``--help`` option output + * a Sphinx extension in ``docs/sphinx/hxtool.py`` generates rST output + to be included in the HTML or manpage documentation + +The syntax of these ``.hx`` files is simple. It is broadly an +alternation of C code put into the C output and rST format text +put into the documention. A few special directives are recognised; +these are all-caps and must be at the beginning of the line. + +``HXCOMM`` is the comment marker. The line, including any arbitrary +text after the marker, is discarded and appears neither in the C output +nor the documentation output. + +``SRST`` starts a reStructuredText section. Following lines +are put into the documentation verbatim, and discarded from the C output. + +``ERST`` ends the documentation section started with ``SRST``, +and switches back to a C code section. + +``DEFHEADING()`` defines a heading that should appear in both the +``--help`` output and in the documentation. This directive should +be in the C code block. If there is a string inside the brackets, +this is the heading to use. If this string is empty, it produces +a blank line in the ``--help`` output and is ignored for the rST +output. + +``ARCHHEADING()`` is a variant of ``DEFHEADING()`` which produces +the heading only if the specified guest architecture was compiled +into QEMU. This should be avoided in new documentation. + +Within C code sections, you should check the comments at the top +of the file to see what the expected usage is, because this +varies between files. For instance in ``qemu-options.hx`` we use +the ``DEF()`` macro to define each option and specify its ``--help`` +text, but in ``hmp-commands.hx`` the C code sections are elements +of an array of structs of type ``HMPCommand`` which define the +name, behaviour and help text for each monitor command. + +In the file ``qemu-options.hx``, do not try to define a +reStructuredText label within a documentation section. This file +is included into two separate Sphinx documents, and some +versions of Sphinx will complain about the duplicate label +that results. diff --git a/docs/devel/index-build.rst b/docs/devel/index-build.rst index 57e8d39d98..90b406ca0e 100644 --- a/docs/devel/index-build.rst +++ b/docs/devel/index-build.rst @@ -10,6 +10,7 @@ the basics if you are adding new files and targets to the build. build-system kconfig + docs testing acpi-bits qtest diff --git a/hmp-commands-info.hx b/hmp-commands-info.hx index f5b37eb74a..da120f82a3 100644 --- a/hmp-commands-info.hx +++ b/hmp-commands-info.hx @@ -1,8 +1,8 @@ -HXCOMM Use DEFHEADING() to define headings in both help text and rST. -HXCOMM Text between SRST and ERST is copied to the rST version and -HXCOMM discarded from C version. -HXCOMM DEF(command, args, callback, arg_string, help) is used to construct -HXCOMM monitor info commands +HXCOMM See docs/devel/docs.rst for the format of this file. +HXCOMM +HXCOMM This file defines the contents of an array of HMPCommand structs +HXCOMM which specify the name, behaviour and help text for HMP commands. +HXCOMM Text between SRST and ERST is rST format documentation. HXCOMM HXCOMM can be used for comments, discarded from both rST and C. HXCOMM HXCOMM In this file, generally SRST fragments should have two extra diff --git a/hmp-commands.hx b/hmp-commands.hx index 765349ed14..2db5701d49 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -1,8 +1,8 @@ -HXCOMM Use DEFHEADING() to define headings in both help text and rST. -HXCOMM Text between SRST and ERST is copied to the rST version and -HXCOMM discarded from C version. -HXCOMM DEF(command, args, callback, arg_string, help) is used to construct -HXCOMM monitor commands +HXCOMM See docs/devel/docs.rst for the format of this file. +HXCOMM +HXCOMM This file defines the contents of an array of HMPCommand structs +HXCOMM which specify the name, behaviour and help text for HMP commands. +HXCOMM Text between SRST and ERST is rST format documentation. HXCOMM HXCOMM can be used for comments, discarded from both rST and C. diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx index 068692d13e..c9dd70a892 100644 --- a/qemu-img-cmds.hx +++ b/qemu-img-cmds.hx @@ -1,3 +1,5 @@ +HXCOMM See docs/devel/docs.rst for the format of this file. +HXCOMM HXCOMM Keep the list of subcommands sorted by name. HXCOMM Use DEFHEADING() to define headings in both help text and rST HXCOMM Text between SRST and ERST are copied to rST version and diff --git a/qemu-options.hx b/qemu-options.hx index b66570ae00..1912b19cb8 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -1,3 +1,5 @@ +HXCOMM See docs/devel/docs.rst for the format of this file. +HXCOMM HXCOMM Use DEFHEADING() to define headings in both help text and rST. HXCOMM Text between SRST and ERST is copied to the rST version and HXCOMM discarded from C version.