[gnome-builder] buildsystem: adjust build system priorities

[Christian Hergert <chergert src gnome org>]

commit 26cfd375c0c2016ad9390a331f295b6e1b38363c
Author: Christian Hergert <chergert redhat com>
Date:   Fri Mar 10 13:10:28 2017 -0800

    buildsystem: adjust build system priorities
    
    Lower is better, and we want autotools to always be the preferred build
    system until we have either 1) rearchitected multi-build systems or 2)
    decided on another "blessed" build system.

 plugins/cargo/cargo_plugin.py          |    3 +--
 plugins/cmake/cmake_plugin/__init__.py |    2 +-
 plugins/meson/meson_plugin/__init__.py |    2 +-
 3 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/plugins/cargo/cargo_plugin.py b/plugins/cargo/cargo_plugin.py
index c556262..d926044 100644
--- a/plugins/cargo/cargo_plugin.py
+++ b/plugins/cargo/cargo_plugin.py
@@ -62,8 +62,7 @@ class CargoBuildSystem(Ide.Object, Ide.BuildSystem, Gio.AsyncInitable):
         return task.propagate_boolean()
 
     def do_get_priority(self):
-        # Priority is used to determine the order of discovery
-        return 2000
+        return 300
 
 class CargoPipelineAddin(Ide.Object, Ide.BuildPipelineAddin):
     """
diff --git a/plugins/cmake/cmake_plugin/__init__.py b/plugins/cmake/cmake_plugin/__init__.py
index c834fb5..2d9cf49 100644
--- a/plugins/cmake/cmake_plugin/__init__.py
+++ b/plugins/cmake/cmake_plugin/__init__.py
@@ -50,7 +50,7 @@ class CMakeBuildSystem(Ide.Object, Ide.BuildSystem, Gio.AsyncInitable):
         return result.propagate_boolean()
 
     def do_get_priority(self):
-        return -300 # Lower priority than Autotools for now
+        return 200
 
 
 class CMakePipelineAddin(Ide.Object, Ide.BuildPipelineAddin):
diff --git a/plugins/meson/meson_plugin/__init__.py b/plugins/meson/meson_plugin/__init__.py
index 5aed956..9a7da2d 100644
--- a/plugins/meson/meson_plugin/__init__.py
+++ b/plugins/meson/meson_plugin/__init__.py
@@ -78,7 +78,7 @@ class MesonBuildSystem(Ide.Object, Ide.BuildSystem, Gio.AsyncInitable):
         return result.propagate_boolean()
 
     def do_get_priority(self):
-        return -200 # Lower priority than Autotools for now
+        return 100
 
     def do_get_build_flags_async(self, ifile, cancellable, callback, data=None):
         task = Gio.Task.new(self, cancellable, callback)