Install the udev rules

These rules are required for libinput to correctly handle pad devices as pads.
And given that most distributions already install them by hand anyway, let's
make the job a bit easier and install it for them.

New configure/meson arguments to provide the path to the udev base directory:
  ./configure --with-udev-dir=/path/to/udev/
  meson builddir -Dudev-dir=/path/to/udev/

If left to its defaults, it will install into $prefix/lib/udev/rules.d which
is what most would expect.

Fixes #144

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

4 files changed, 45 insertions, 6 deletions

diff --git a/configure.ac b/configure.ac
index c5323c6..0479dac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,6 +41,19 @@ if test "x$HAVE_GLIB236" != "xyes"; then
     AC_DEFINE(NEED_G_TYPE_INIT, 1, [Need g_type_init() call])
 fi
 
+udev_dir_default="$libdir/udev"
+AC_ARG_WITH(udev-dir,
+            AS_HELP_STRING([--with-udev-dir=DIR],
+                           [udev base directory [[default=$udev_dir_default]]]),
+            [],
+            [with_udev_dir="yes"])
+AS_CASE($with_udev_dir,
+        [no|""], [AC_MSG_ERROR([You must define a udev base directory])],
+        [yes], [udevdir="$udev_dir_default"],
+        [udevdir="$with_udev_dir"])
+UDEV_DIR=${udevdir}
+AC_SUBST(UDEV_DIR)
+
 AC_CONFIG_FILES([Makefile
                  data/Makefile
                  data/layouts/Makefile
diff --git a/meson.build b/meson.build
index f33390d..908811b 100644
--- a/meson.build
+++ b/meson.build
@@ -11,6 +11,12 @@ dir_layouts = join_paths(dir_data, 'layouts')
 dir_man1    = join_paths(get_option('prefix'), get_option('mandir'), 'man1')
 dir_src     = join_paths(meson.source_root(), 'libwacom')
 dir_test    = join_paths(meson.source_root(), 'test')
+dir_sys_udev= join_paths(get_option('prefix'), 'lib', 'udev')
+
+dir_udev = get_option('udev-dir')
+if dir_udev == ''
+	dir_udev = dir_sys_udev
+endif
 
 # Do not modify this, use symbol versioning instead.
 libwacom_lt_c=8
@@ -405,12 +411,18 @@ executable('libwacom-list-local-devices',
 
 tools_cflags = ['-DTOPSRCDIR="@0@"'.format(meson.source_root())]
 
-executable('generate-udev-rules',
-	   'tools/generate-udev-rules.c',
-	   dependencies: [dep_libwacom, dep_glib],
-	   include_directories: [includes_src],
-	   c_args: tools_cflags,
-	   install: false)
+gen_udev_rules = executable('generate-udev-rules',
+			    'tools/generate-udev-rules.c',
+			    dependencies: [dep_libwacom, dep_glib],
+			    include_directories: [includes_src],
+			    c_args: tools_cflags,
+			    install: false)
+custom_target('udev-rules',
+	      command: gen_udev_rules,
+	      capture: true,
+	      output: '65-libwacom.rules',
+	      install: true,
+	      install_dir: join_paths(dir_udev, 'rules.d'))
 
 executable('list-devices',
 	   'tools/list-devices.c',
diff --git a/meson_options.txt b/meson_options.txt
index 8714e44..1d75434 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,3 +1,7 @@
+option('udev-dir',
+       type: 'string',
+       value: '',
+       description: 'udev base directory [default=$prefix/lib/udev]')
 option('tests',
        type: 'boolean',
        value: true,
diff --git a/tools/Makefile.am b/tools/Makefile.am
index 4055a0d..66dba2f 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -25,3 +25,13 @@ show_svg_image_CFLAGS = $(GTK2_CFLAGS)
 endif
 
 dist_man1_MANS = libwacom-list-local-devices.man
+
+rules = 65-libwacom.rules
+udev_rulesdir=$(UDEV_DIR)/rules.d
+dist_udev_rules_DATA = $(rules)
+
+$(rules): generate-udev-rules
+	$(builddir)/$< > $@
+
+CLEANFILES = $(rules)
+EXTRA_DIST = $(rules)