weston: add weston-ready

Weston seems to take variable amounts of time to initialize on startup
depending on configuration (e.g. gst-record feature being enabled for
cluster support).  To avoid windowmanager and its dependencies failing,
patch LayerManagerControl so that errors can be detected; then use it
in a new script, weston-ready, to detect if Weston is functional.  A
corresponding systemd service unit is also added so that things can
use it in their dependencies.

Change-Id: I5711e7f9d9a891e1c7a160b5d65711bd6e7fee03
Signed-off-by: Scott Murray <scott.murray@konsulko.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/meta-agl-profile-graphical/recipes-graphics/wayland/wayland-ivi-extension/0002-add-LayerManagerControl-error-status.patch b/meta-agl-profile-graphical/recipes-graphics/wayland/wayland-ivi-extension/0002-add-LayerManagerControl-error-status.patch
new file mode 100644
index 000000000..9f1ab47b7
--- /dev/null
+++ b/meta-agl-profile-graphical/recipes-graphics/wayland/wayland-ivi-extension/0002-add-LayerManagerControl-error-status.patch
@@ -0,0 +1,21 @@
+LayerManagerControl: add error exit status
+
+Tweak to add a non-zero exit status on errors.  This is useful for
+scripting, and allows writing a simple loop to detect Weston readiness.
+
+Upstream-Status: Pending
+
+Signed-off-by: Scott Murray <scott.murray@konsulko.com>
+
+diff --git a/ivi-layermanagement-examples/LayerManagerControl/src/main.cpp b/ivi-layermanagement-examples/LayerManagerControl/src/main.cpp
+index 8ee0546..210e21e 100644
+--- a/ivi-layermanagement-examples/LayerManagerControl/src/main.cpp
++++ b/ivi-layermanagement-examples/LayerManagerControl/src/main.cpp
+@@ -45,6 +45,7 @@ int main(int argc, char* argv[])
+     if (CommandSuccess != interpreter.interpretCommand(userCommand))
+     {
+         cerr << "Interpreter error: " << interpreter.getLastError() << endl;
++        return 1;
+     }
+ 
+     return 0;