Bunch of neat improvements:

- xml generates correctly depend upon the test binaries
- no need to re-run autogen.sh when new chapters/functions get added,
  all handed by meson

Still one issue:

- the gtkdoc target doesn't depend upon the custom_target yet, hacked
  around using build_by_default: true

  This is an issue known to upstream already:

  https://github.com/mesonbuild/meson/issues/2148

v2: Bump meson version to 0.42, since that's the first release which
adds the build dir when running the gtkdoc tools, and hence allows
including generated files.

v2:
- Undo the bump, it's only needed for generated source files. Other
  generated files as input should work with 0.40 already.

- Generate version.xml from version.xml.in, which allows us to keep
  the &version; entity.

v3: Add github issue link.

Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch>
---
 docs/meson.build                                   |  1 +
 .../intel-gpu-tools/generate_description_xml.sh    | 44 ++++++++++++
 .../intel-gpu-tools/generate_programs_xml.sh       | 22 ++++++
 docs/reference/intel-gpu-tools/meson.build         | 80 ++++++++++++++++++++++
 docs/reference/meson.build                         |  1 +
 meson.build                                        |  3 +
 meson.sh                                           |  2 +-
 tests/meson.build                                  |  6 +-
 8 files changed, 157 insertions(+), 2 deletions(-)
 create mode 100644 docs/meson.build
 create mode 100644 docs/reference/intel-gpu-tools/generate_description_xml.sh
 create mode 100755 docs/reference/intel-gpu-tools/generate_programs_xml.sh
 create mode 100644 docs/reference/intel-gpu-tools/meson.build
 create mode 100644 docs/reference/meson.build

diff --git a/docs/meson.build b/docs/meson.build
new file mode 100644
index 000000000000..ead14c4015d9
--- /dev/null
+++ b/docs/meson.build
@@ -0,0 +1 @@
+subdir('reference')
diff --git a/docs/reference/intel-gpu-tools/generate_description_xml.sh 
b/docs/reference/intel-gpu-tools/generate_description_xml.sh
new file mode 100644
index 000000000000..8e39e0c4c289
--- /dev/null
+++ b/docs/reference/intel-gpu-tools/generate_description_xml.sh
@@ -0,0 +1,44 @@
+#!/bin/sh
+
+output=$1
+filter=$2
+testlist=$3
+testdir=$(dirname $testlist)
+
+echo "<?xml version=\"1.0\"?>" > $output
+echo "<!DOCTYPE refsect1 PUBLIC \"-//OASIS//DTD DocBook XML V4.3//EN\"" >> 
$output
+echo "               
\"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd\""; >> $output
+echo "[" >> $output
+echo "  <!ENTITY % local.common.attrib \"xmlns:xi  CDATA  #FIXED 
'http://www.w3.org/2003/XInclude'\">" >> $output
+echo "  <!ENTITY version SYSTEM \"version.xml\">" >> $output
+echo "]>" >> $output
+echo "<refsect1>" >> $output
+echo "<title>Description</title>" >> $output
+for test in `cat $testlist | tr ' ' '\n' | grep "^$filter" | sort`; do
+       echo "<refsect2 id=\"$test\"><title>" >> $output;
+       echo "$test" | perl -pe 
's/(?<=_)$(KEYWORDS)(?=(_|\W))/<acronym>\1<\/acronym>/g' >> $output;
+       echo "</title><para><![CDATA[" >> $output;
+       testprog=$testdir/$test;
+        ./$testprog --help-description >> $output;
+       echo "]]></para>" >> $output;
+       if ./$testprog --list-subtests > /dev/null ; then
+               echo "<refsect3><title>Subtests</title>" >> $output;
+               subtest_list=`./$testprog --list-subtests`;
+               subtest_count=`echo $subtest_list | wc -w`;
+               if [ $subtest_count -gt 100 ]; then
+                       echo "<para>This test has over 100 subtests. " >> 
$output;
+                       echo "Run <command>$test</command> 
<option>--list-subtests</option> to list them.</para>" >> $output;
+               else
+                       echo "<simplelist>" >> $output;
+                       for subtest in $subtest_list; do
+                               echo "<member>" >> $output;
+                               echo "$subtest" | perl -pe 
's/\b$(KEYWORDS)\b/<acronym>\1<\/acronym>/g' >> $output;
+                               echo "</member>" >> $output;
+                       done;
+                       echo "</simplelist>" >> $output;
+               fi;
+               echo "</refsect3>" >> $output;
+       fi;
+       echo "</refsect2>" >> $output;
+done;
+echo "</refsect1>" >> $output
diff --git a/docs/reference/intel-gpu-tools/generate_programs_xml.sh 
b/docs/reference/intel-gpu-tools/generate_programs_xml.sh
new file mode 100755
index 000000000000..73adc8cc7bfc
--- /dev/null
+++ b/docs/reference/intel-gpu-tools/generate_programs_xml.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+output=$1
+filter=$2
+testlist=$3
+
+echo "<?xml version=\"1.0\"?>" > $output
+echo "<!DOCTYPE refsect1 PUBLIC \"-//OASIS//DTD DocBook XML V4.3//EN\"" >> 
$output
+echo "               
\"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd\""; >> $output
+echo "[" >> $output
+echo "  <!ENTITY % local.common.attrib \"xmlns:xi  CDATA  #FIXED 
'http://www.w3.org/2003/XInclude'\">" >> $output
+echo "  <!ENTITY version SYSTEM \"version.xml\">" >> $output
+echo "]>" >> $output
+echo "<refsect1>" >> $output
+echo "<title>Programs</title>" >> $output
+echo "<informaltable pgwide=\"1\" frame=\"none\"><tgroup cols=\"2\"><tbody>" 
>> $output
+for test in `cat $testlist | tr ' ' '\n' | grep "^$filter" | sort`; do
+       echo "<row><entry role=\"program_name\">" >> $output;
+       echo "<link linkend=\"$test\">$test</link></entry></row>" >> $output;
+done;
+echo "</tbody></tgroup></informaltable>" >> $output
+echo "</refsect1>" >> $output
diff --git a/docs/reference/intel-gpu-tools/meson.build 
b/docs/reference/intel-gpu-tools/meson.build
new file mode 100644
index 000000000000..1c009229aae2
--- /dev/null
+++ b/docs/reference/intel-gpu-tools/meson.build
@@ -0,0 +1,80 @@
+gnome = import('gnome')
+
+ignore_headers = [
+       'gen6_render.h',
+       'gen7_media.h',
+       'gen7_render.h',
+       'gen8_media.h',
+       'gen8_render.h',
+       'gpgpu_fill.h',
+       'i830_reg.h',
+       'i915_3d.h',
+       'i915_pciids.h',
+       'i915_reg.h',
+       'igt_edid_template.h',
+       'intel_reg.h',
+       'debug.h',
+       'instdone.h',
+       'media_fill.h',
+       'rendercopy.h',
+       'media_spin.h',
+       'media_fill_gen9.h',
+       'gen9_render.h',
+       'version.h',
+]
+
+test_groups = [
+       'amdgpu',
+       'chamelium',
+       'core',
+       'debugfs',
+       'drm',
+       'drv',
+       'gem',
+       'gen3',
+       'gen7',
+       'gvt',
+       'kms',
+       'meta',
+       'perf',
+       'pm',
+       'prime',
+       'sw_sync',
+       'testdisplay',
+       'tools',
+       'vgem',
+]
+
+gen_description = find_program('generate_description_xml.sh')
+gen_programs = find_program('generate_programs_xml.sh')
+
+test_list_files = []
+
+foreach group : test_groups
+       programs_xml = 'igt_test_programs_' + group + '_programs.xml'
+       custom_target(programs_xml,
+                     output : programs_xml,
+                     build_by_default : true,
+                     command : [ gen_programs, '@OUTPUT@', group, test_list ])
+
+       description_xml = 'igt_test_programs_' + group + '_description.xml'
+       custom_target(description_xml,
+                     output : description_xml,
+                     build_by_default : true,
+                     depends : test_executables,
+                     command : [ gen_description, '@OUTPUT@', group, test_list 
])
+endforeach
+
+configure_file(input: 'version.xml.in',
+              output: 'version.xml',
+              install: false, configuration: config)
+
+gnome.gtkdoc('intel-gpu-tools',
+            content_files : ['igt_test_programs.xml'],
+            dependencies : lib_igt,
+            install : true,
+            main_xml : 'intel-gpu-tools-docs.xml',
+            scan_args : '--rebuild-sections',
+            mkdb_args : '--output-format=xml',
+            ignore_headers : ignore_headers,
+            src_dir : inc_for_gtkdoc)
diff --git a/docs/reference/meson.build b/docs/reference/meson.build
new file mode 100644
index 000000000000..944f28a5615e
--- /dev/null
+++ b/docs/reference/meson.build
@@ -0,0 +1 @@
+subdir('intel-gpu-tools')
diff --git a/meson.build b/meson.build
index a564893dc7cb..0950d3c7bbd5 100644
--- a/meson.build
+++ b/meson.build
@@ -28,6 +28,8 @@ endforeach
 
 inc = include_directories('include/drm-uapi', 'lib', '.')
 
+inc_for_gtkdoc = include_directories('lib')
+
 config = configuration_data()
 
 libdrm = dependency('libdrm', version : '>=2.4.82')
@@ -136,3 +138,4 @@ if libdrm_intel.found()
        endif
 endif
 subdir('man')
+subdir('docs')
diff --git a/meson.sh b/meson.sh
index cbf1a9326dbe..ae8e3488d962 100755
--- a/meson.sh
+++ b/meson.sh
@@ -28,7 +28,7 @@ install uninstall:
        echo "meson install support not yet completed" && false
 
 docs:
-       echo "meson gtkdoc support not yet completed" && false
+       ninja -C build intel-gpu-tools-doc
 
 EOF
 
diff --git a/tests/meson.build b/tests/meson.build
index 8d8abe062640..088c37ec9b15 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -260,12 +260,14 @@ endif
 
 libexecdir = join_paths(get_option('prefix'), get_option('libexecdir'), 
'intel-gpu-tools')
 
+test_executables = []
+
 foreach prog : test_progs
        link = []
        if prog == 'perf_pmu'
                link += lib_igt_perf
        endif
-       executable(prog, prog + '.c',
+       test_executables += executable(prog, prog + '.c',
                   dependencies : test_deps,
                   install_dir : libexecdir,
                   link_with : link,
@@ -287,6 +289,8 @@ custom_target('testlist',
              install : true,
              install_dir : pkgdatadir)
 
+test_list = files('test-list.txt')
+
 test_script = find_program('igt_command_line.sh')
 foreach prog : test_progs
        test('testcase check: ' + prog, test_script,
-- 
2.15.0

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