prg_install = find_program('install')

doxygen = find_program('doxygen', required : false)
if not doxygen.found()
	error('Program "doxygen" not found or not executable. Try building with -Ddocumentation=false')
endif
dot = find_program('dot', required : false)
if not dot.found()
	error('Program "dot" not found or not executable. Try building with -Ddocumentation=false')
endif

mainpage = vcs_tag(command : ['git', 'log', '-1', '--format=%h'],
		 fallback : 'unknown',
		 input : 'mainpage.dox',
		 output : 'mainpage.dox',
		 replace_string: '__GIT_VERSION__')

src_doxygen = files(
	# source files
	'../../src/libinput.h',
	# style files
	'style/header.html',
	'style/footer.html',
	'style/customdoxygen.css',
	'style/bootstrap.css',
	'style/libinputdoxygen.css',
)

doxyfiles = []
foreach f : src_doxygen
	df = configure_file(input: f,
			    output: '@PLAINNAME@',
			    copy : true)
	doxyfiles += [ df ]
endforeach

doc_config = configuration_data()
doc_config.set('PACKAGE_NAME', meson.project_name())
doc_config.set('PACKAGE_VERSION', meson.project_version())
doc_config.set('builddir', meson.current_build_dir())

doxyfile = configure_file(input : 'libinput.doxygen.in',
			  output : 'libinput.doxygen',
			  configuration : doc_config)

custom_target('doxygen',
	      input : [ doxyfiles, doxyfile, mainpage ] + src_doxygen,
	      output : [ 'html' ],
	      command : [ doxygen, doxyfile ],
	      install : false,
	      depends: [ mainpage ],
	      build_by_default : true)