[gnome-builder] foundry: add API to get project version

[Christian Hergert <chergert src gnome org>]

commit 098536493c5eb76bd3020d44b07adeea44ab724c
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jan 11 12:36:03 2019 -0800

    foundry: add API to get project version

 src/libide/foundry/ide-build-system.c | 23 +++++++++++++++++++++++
 src/libide/foundry/ide-build-system.h |  3 +++
 2 files changed, 26 insertions(+)
---
diff --git a/src/libide/foundry/ide-build-system.c b/src/libide/foundry/ide-build-system.c
index 831b43f7b..940faba2e 100644
--- a/src/libide/foundry/ide-build-system.c
+++ b/src/libide/foundry/ide-build-system.c
@@ -672,3 +672,26 @@ ide_build_system_supports_toolchain (IdeBuildSystem *self,
 
   return FALSE;
 }
+
+/**
+ * ide_build_system_get_project_version:
+ * @self: a #IdeBuildSystem
+ *
+ * If the build system supports it, gets the project version as configured
+ * in the build system's configuration files.
+ *
+ * Returns: (transfer full) (nullable): a string containing the project version
+ *
+ * Since: 3.32
+ */
+gchar *
+ide_build_system_get_project_version (IdeBuildSystem *self)
+{
+  g_return_val_if_fail (IDE_IS_MAIN_THREAD (), NULL);
+  g_return_val_if_fail (IDE_IS_BUILD_SYSTEM (self), NULL);
+
+  if (IDE_BUILD_SYSTEM_GET_IFACE (self)->get_project_version)
+    return IDE_BUILD_SYSTEM_GET_IFACE (self)->get_project_version (self);
+
+  return NULL;
+}
diff --git a/src/libide/foundry/ide-build-system.h b/src/libide/foundry/ide-build-system.h
index 271aee267..4b4d6e8c3 100644
--- a/src/libide/foundry/ide-build-system.h
+++ b/src/libide/foundry/ide-build-system.h
@@ -63,6 +63,7 @@ struct _IdeBuildSystemInterface
   gchar      *(*get_display_name)                  (IdeBuildSystem       *self);
   gboolean    (*supports_toolchain)                (IdeBuildSystem       *self,
                                                     IdeToolchain         *toolchain);
+  gchar      *(*get_project_version)               (IdeBuildSystem       *self);
 };
 
 IDE_AVAILABLE_IN_3_32
@@ -77,6 +78,8 @@ IDE_AVAILABLE_IN_3_32
 gchar           *ide_build_system_get_builddir                     (IdeBuildSystem       *self,
                                                                     IdeBuildPipeline     *pipeline);
 IDE_AVAILABLE_IN_3_32
+gchar           *ide_build_system_get_project_version              (IdeBuildSystem       *self);
+IDE_AVAILABLE_IN_3_32
 void             ide_build_system_get_build_flags_async            (IdeBuildSystem       *self,
                                                                     GFile                *file,
                                                                     GCancellable         *cancellable,