debian: Wrap squeekboard in theme selector

This works around https://source.puri.sm/Librem5/squeekboard/issues/151 by providing a dark style to match the dark style of the layouts.

debian/control

@@ -28,6 +28,8 @@ Homepage: https://source.puri.sm/Librem5/squeekboard
 Package: squeekboard
 Architecture: linux-any
 Depends:
+# for the Adwaita-dark theme
+ gnome-themes-extra-data,
  ${shlibs:Depends}
  ${misc:Depends}
 Description: On-screen keyboard for Wayland

debian/squeekboard.lintian-overrides

@@ -1,2 +1,2 @@
 # yaml-rust 0.4.3 shares some roots with libyaml, including the string which lintian checks, creating a false positive
-squeekboard binary: embedded-library usr/bin/squeekboard: libyaml
+squeekboard binary: embedded-library usr/bin/squeekboard-real: libyaml

src/meson.build

@@ -95,7 +95,20 @@ libsqueekboard = static_library('libsqueekboard',
     '-DEEK_COMPILATION=1'],
 )
 
-squeekboard = executable('squeekboard',
+# the straight binary needs to be demoted in favor of the wrapper script
+# due to styling being inconsistent
+bindir = join_paths(prefix, get_option('bindir'))
+wrapper_conf = configuration_data()
+wrapper_conf.set('bindir', bindir)
+configure_file(
+  input: '../tools/squeekboard.in',
+  output: 'squeekboard',
+  install_dir: bindir,
+  configuration: wrapper_conf,
+  install: true,
+)
+
+squeekboard = executable('squeekboard-real',
   'server-main.c',
   wl_proto_sources,
   squeekboard_resources,

tools/squeekboard.in

@@ -12,4 +12,4 @@ for DIR in ${DIRS}; do
   fi;
 done;
 
-exec $(which squeekboard)
+exec @bindir@/squeekboard-real