Install appdata information for QGIS

CMakeLists.txt

@@ -906,3 +906,7 @@ IF (WITH_CORE)
   SET(CPACK_PACKAGE_DESCRIPTION_FILE "${CMAKE_SOURCE_DIR}/README.md")
   INCLUDE(CPack)
 ENDIF (WITH_CORE)
+
+IF (CMAKE_SYSTEM_NAME STREQUAL "Linux")
+  ADD_SUBDIRECTORY(linux)
+ENDIF (CMAKE_SYSTEM_NAME STREQUAL "Linux")

linux/CMakeLists.txt

@@ -0,0 +1 @@
+install(FILES org.qgis.qgis.appdata.xml DESTINATION share/metainfo)

linux/org.qgis.qgis.appdata.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop">
+  <id>org.qgis.qgis.desktop</id>
+  <name>QGIS Desktop</name>
+  <summary>Create, edit, visualise, analyse and publish geospatial information</summary>
+  <description>
+    <p>QGIS is a user friendly Open Source Geographic Information System (GIS) licensed under the GNU General Public License. QGIS is an official project of the Open Source Geospatial Foundation (OSGeo).</p>
+    <p>It runs on Linux, Unix, Mac OSX, Windows and Android and supports numerous vector, raster, and database formats and functionalities.</p>
+  </description>
+  <metadata_license>MIT</metadata_license>
+  <project_license>GPL-2.0+</project_license>
+  <url type="bugtracker">https://issues.qgis.org/projects/qgis/issues/</url>
+  <url type="donation">https://qgis.org/en/site/getinvolved/donations.html</url>
+  <url type="faq">https://qgis.org/en/site/getinvolved/faq/index.html</url>
+  <url type="help">https://qgis.org/en/docs/index.html</url>
+  <url type="homepage">https://qgis.org</url>
+
+  <project_group>QGIS</project_group>
+  <releases>
+    <release version="3.0" />
+  </releases>
+  <launchable type="desktop-id">qgis.desktop</launchable>
+  <provides>
+    <binary>qgis</binary>
+  </provides>
+</component>