build: add sdbus++-gen-meson generated files

Use the tool to generate the meson.build files for the current
tree of interfaces, but do not utilize them yet.  Add a
small helper tool to regenerate as needed.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ie1f68984e5b01dcab661863d2ac719d0e3cd45c1
diff --git a/gen/xyz/openbmc_project/State/meson.build b/gen/xyz/openbmc_project/State/meson.build
new file mode 100644
index 0000000..63dbd21
--- /dev/null
+++ b/gen/xyz/openbmc_project/State/meson.build
@@ -0,0 +1,125 @@
+# Generated file; do not modify.
+subdir('BMC')
+generated_others += custom_target(
+    'xyz/openbmc_project/State/BMC__markdown'.underscorify(),
+    input: [ meson.source_root() / 'xyz/openbmc_project/State/BMC.errors.yaml', meson.source_root() / 'xyz/openbmc_project/State/BMC.interface.yaml',  ],
+    output: [ 'BMC.md' ],
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'markdown',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.source_root(),
+        'xyz/openbmc_project/State/BMC',
+    ],
+    build_by_default: true,
+)
+
+subdir('Boot')
+subdir('Chassis')
+generated_others += custom_target(
+    'xyz/openbmc_project/State/Chassis__markdown'.underscorify(),
+    input: [ meson.source_root() / 'xyz/openbmc_project/State/Chassis.errors.yaml', meson.source_root() / 'xyz/openbmc_project/State/Chassis.interface.yaml',  ],
+    output: [ 'Chassis.md' ],
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'markdown',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.source_root(),
+        'xyz/openbmc_project/State/Chassis',
+    ],
+    build_by_default: true,
+)
+
+subdir('Decorator')
+subdir('Drive')
+generated_others += custom_target(
+    'xyz/openbmc_project/State/Drive__markdown'.underscorify(),
+    input: [ meson.source_root() / 'xyz/openbmc_project/State/Drive.interface.yaml',  ],
+    output: [ 'Drive.md' ],
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'markdown',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.source_root(),
+        'xyz/openbmc_project/State/Drive',
+    ],
+    build_by_default: true,
+)
+
+subdir('Host')
+generated_others += custom_target(
+    'xyz/openbmc_project/State/Host__markdown'.underscorify(),
+    input: [ meson.source_root() / 'xyz/openbmc_project/State/Host.errors.yaml', meson.source_root() / 'xyz/openbmc_project/State/Host.interface.yaml',  ],
+    output: [ 'Host.md' ],
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'markdown',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.source_root(),
+        'xyz/openbmc_project/State/Host',
+    ],
+    build_by_default: true,
+)
+
+subdir('OperatingSystem')
+subdir('PowerOnHours')
+generated_others += custom_target(
+    'xyz/openbmc_project/State/PowerOnHours__markdown'.underscorify(),
+    input: [ meson.source_root() / 'xyz/openbmc_project/State/PowerOnHours.interface.yaml',  ],
+    output: [ 'PowerOnHours.md' ],
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'markdown',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.source_root(),
+        'xyz/openbmc_project/State/PowerOnHours',
+    ],
+    build_by_default: true,
+)
+
+subdir('ScheduledHostTransition')
+generated_others += custom_target(
+    'xyz/openbmc_project/State/ScheduledHostTransition__markdown'.underscorify(),
+    input: [ meson.source_root() / 'xyz/openbmc_project/State/ScheduledHostTransition.interface.yaml',  ],
+    output: [ 'ScheduledHostTransition.md' ],
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'markdown',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.source_root(),
+        'xyz/openbmc_project/State/ScheduledHostTransition',
+    ],
+    build_by_default: true,
+)
+
+subdir('Shutdown')
+subdir('SystemdTarget')
+generated_others += custom_target(
+    'xyz/openbmc_project/State/SystemdTarget__markdown'.underscorify(),
+    input: [ meson.source_root() / 'xyz/openbmc_project/State/SystemdTarget.errors.yaml',  ],
+    output: [ 'SystemdTarget.md' ],
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'markdown',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.source_root(),
+        'xyz/openbmc_project/State/SystemdTarget',
+    ],
+    build_by_default: true,
+)
+
+subdir('Watchdog')
+generated_others += custom_target(
+    'xyz/openbmc_project/State/Watchdog__markdown'.underscorify(),
+    input: [ meson.source_root() / 'xyz/openbmc_project/State/Watchdog.interface.yaml',  ],
+    output: [ 'Watchdog.md' ],
+    command: [
+        sdbuspp_gen_meson_prog, '--command', 'markdown',
+        '--output', meson.current_build_dir(),
+        '--tool', sdbusplusplus_prog,
+        '--directory', meson.source_root(),
+        'xyz/openbmc_project/State/Watchdog',
+    ],
+    build_by_default: true,
+)
+