build(docs): use doxygen_add_docs() #726
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I had originally done this in mozilla#662, but never re-submitted it. 06aa271 reminded me that I should also include Doxygen documentation in the Debian package, so I took a bit of time to re-prepare this patch. Using CMake's doxygen_add_docs() isn't only more concise and idiomatic, it also solves actual issues of Doxygen-generated documentation. Without this patch, the generated docs include an absolute path of the build directory; apart from being ugly, it also creates issues with reproducibility, as it is required to rebuild the package in the same exact directory to get a bit-by-bit identical copy of the package. CMake is able to work around this Doxygen quirk, and the generated HTML only includes relative paths. The documentation gets now output to build/html/ instead of build/docs/html/. As another minor change, I've also associated the installed docs to the Documentation component, so that users can choose to install only them with `cmake --install builddir --component Documentation`. Here's a full diff of the generated output before and after applying this patch: diff html_no_patch_dot/cubeb_8h.html html_dot/cubeb_8h.html 8c8 < <title>cubeb: /tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb/cubeb.h File Reference</title> --- > <title>cubeb: include/cubeb/cubeb.h File Reference</title> 87,92c87,92 < <div class="center"><img src="cubeb_8h__incl.png" border="0" usemap="#a_2tmp_2tmp_8ils_at_y7fk0_2up_2cubeb_2include_2cubeb_2cubeb_8h" alt=""/></div> < <map name="a_2tmp_2tmp_8ils_at_y7fk0_2up_2cubeb_2include_2cubeb_2cubeb_8h" id="a_2tmp_2tmp_8ils_at_y7fk0_2up_2cubeb_2include_2cubeb_2cubeb_8h"> < <area shape="rect" title="The libcubeb C API." alt="" coords="99,5,277,61"/> < <area shape="rect" title=" " alt="" coords="5,109,128,136"/> < <area shape="rect" title=" " alt="" coords="153,109,223,136"/> < <area shape="rect" title=" " alt="" coords="247,109,318,136"/> --- > <div class="center"><img src="cubeb_8h__incl.png" border="0" usemap="#ainclude_2cubeb_2cubeb_8h" alt=""/></div> > <map name="ainclude_2cubeb_2cubeb_8h" id="ainclude_2cubeb_2cubeb_8h"> > <area shape="rect" title="The libcubeb C API." alt="" coords="105,5,271,32"/> > <area shape="rect" title=" " alt="" coords="5,80,128,107"/> > <area shape="rect" title=" " alt="" coords="153,80,223,107"/> > <area shape="rect" title=" " alt="" coords="247,80,318,107"/> diff html_no_patch_dot/cubeb_8h__incl.map html_dot/cubeb_8h__incl.map 1,5c1,5 < <map id="/tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb/cubeb.h" name="/tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb/cubeb.h"> < <area shape="rect" id="node1" title="The libcubeb C API." alt="" coords="99,5,277,61"/> < <area shape="rect" id="node2" title=" " alt="" coords="5,109,128,136"/> < <area shape="rect" id="node3" title=" " alt="" coords="153,109,223,136"/> < <area shape="rect" id="node4" title=" " alt="" coords="247,109,318,136"/> --- > <map id="include/cubeb/cubeb.h" name="include/cubeb/cubeb.h"> > <area shape="rect" id="node1" title="The libcubeb C API." alt="" coords="105,5,271,32"/> > <area shape="rect" id="node2" title=" " alt="" coords="5,80,128,107"/> > <area shape="rect" id="node3" title=" " alt="" coords="153,80,223,107"/> > <area shape="rect" id="node4" title=" " alt="" coords="247,80,318,107"/> diff html_no_patch_dot/cubeb_8h__incl.md5 html_dot/cubeb_8h__incl.md5 1c1 < 80f3c1becd2984dea59dbcc5f43d8bc7 \ No newline at end of file --- > bd73bf4d2f8603949fb7021f1b7e2758 \ No newline at end of file Binary files html_no_patch_dot/cubeb_8h__incl.png and html_dot/cubeb_8h__incl.png differ diff html_no_patch_dot/cubeb_8h_source.html html_dot/cubeb_8h_source.html 8c8 < <title>cubeb: /tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb/cubeb.h Source File</title> --- > <title>cubeb: include/cubeb/cubeb.h Source File</title> diff html_no_patch_dot/dir_4a77ea686d101b1caa0240510cb36860.html html_dot/dir_4a77ea686d101b1caa0240510cb36860.html 8c8 < <title>cubeb: /tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb Directory Reference</title> --- > <title>cubeb: include/cubeb Directory Reference</title> 75c75 < <div class="center"><img src="dir_4a77ea686d101b1caa0240510cb36860_dep.png" border="0" usemap="#adir__4a77ea686d101b1caa0240510cb36860__dep" alt="/tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb"/></div> --- > <div class="center"><img src="dir_4a77ea686d101b1caa0240510cb36860_dep.png" border="0" usemap="#adir__4a77ea686d101b1caa0240510cb36860__dep" alt="include/cubeb"/></div> diff html_no_patch_dot/dir_4a77ea686d101b1caa0240510cb36860_dep.map html_dot/dir_4a77ea686d101b1caa0240510cb36860_dep.map 1c1 < <map id="/tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb" name="/tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb"> --- > <map id="include/cubeb" name="include/cubeb"> diff html_no_patch_dot/dir_4a77ea686d101b1caa0240510cb36860_dep.md5 html_dot/dir_4a77ea686d101b1caa0240510cb36860_dep.md5 1c1 < d2b3a541ded19d569e3456d07b13bfca \ No newline at end of file --- > ba94d8d8e5033c1685cddf5e6ffcb5a1 \ No newline at end of file diff html_no_patch_dot/dir_d44c64559bbebec7f509842c48db8b23.html html_dot/dir_d44c64559bbebec7f509842c48db8b23.html 8c8 < <title>cubeb: /tmp/tmp.ilsAtY7fk0/up/cubeb/include Directory Reference</title> --- > <title>cubeb: include Directory Reference</title> Common subdirectories: html_no_patch_dot/search and html_dot/search diff html_no_patch_dot/structcubeb__device.html html_dot/structcubeb__device.html 90c90 < <li>/tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb/<a class="el" href="cubeb_8h_source.html">cubeb.h</a></li> --- > <li>include/cubeb/<a class="el" href="cubeb_8h_source.html">cubeb.h</a></li> diff html_no_patch_dot/structcubeb__device__collection.html html_dot/structcubeb__device__collection.html 100c100 < <li>/tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb/<a class="el" href="cubeb_8h_source.html">cubeb.h</a></li> --- > <li>include/cubeb/<a class="el" href="cubeb_8h_source.html">cubeb.h</a></li> diff html_no_patch_dot/structcubeb__device__info.html html_dot/structcubeb__device__info.html 147c147 < <li>/tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb/<a class="el" href="cubeb_8h_source.html">cubeb.h</a></li> --- > <li>include/cubeb/<a class="el" href="cubeb_8h_source.html">cubeb.h</a></li> diff html_no_patch_dot/structcubeb__stream__params.html html_dot/structcubeb__stream__params.html 167c167 < <li>/tmp/tmp.ilsAtY7fk0/up/cubeb/include/cubeb/<a class="el" href="cubeb_8h_source.html">cubeb.h</a></li> --- > <li>include/cubeb/<a class="el" href="cubeb_8h_source.html">cubeb.h</a></li>
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I had originally done this in #662, but never re-submitted it. 06aa271 reminded me that I should also include Doxygen documentation in the Debian package, so I took a bit of time to re-prepare this patch.
Using CMake's
doxygen_add_docs()isn't only more concise and idiomatic, it also solves actual issues of Doxygen-generated documentation. Without this patch, the generated docs include an absolute path of the build directory; apart from being ugly, it also creates issues with reproducibility, as it is required to rebuild the package in the same exact directory to get a bit-by-bit identical copy of the package.CMake is able to work around this Doxygen quirk, and the generated HTML only includes relative paths.
The documentation gets now output to
build/html/instead ofbuild/docs/html/.As another minor change, I've also associated the installed docs to the
Documentationcomponent, so that users can choose to install only them withcmake --install builddir --component Documentation.Here's a full diff of the generated output before and after applying this patch: