[geary] Specify git hash when compiled from source. Bug 763986.

[Michael Gratton <mjog src gnome org>]

commit e7ace76507463b84b3347a19800041e8d6bd83d4
Author: Gautier Pelloux-Prayer <gautier+git damsy net>
Date:   Thu Sep 29 13:49:02 2016 +0200

    Specify git hash when compiled from source. Bug 763986.

 CMakeLists.txt                                |   20 ++++++++++++--------
 cmake/gitversion.cmake                        |   14 ++++++++++++++
 src/CMakeLists.txt                            |   17 ++++++++++++++---
 src/client/application/geary-application.vala |    5 ++---
 src/console/main.vala                         |    8 ++------
 src/geary-version.vala.in                     |    9 +++++++++
 6 files changed, 53 insertions(+), 20 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b23b332..2966f60 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,7 +19,7 @@ list(APPEND
 #
 set(GETTEXT_PACKAGE "geary")
 set(RELEASE_NAME "Lightweight email client for GNOME.")
-set(VERSION "0.11.0")
+set(VERSION "0.11.2-dev")
 set(VERSION_INFO "Release")
 set(LANGUAGE_SUPPORT_DIRECTORY ${CMAKE_INSTALL_PREFIX}/share/locale)
 
@@ -123,6 +123,8 @@ else()
   endif()
 endif()
 
+find_package(Git QUIET)
+
 # intl
 include(Gettext)
 if (XGETTEXT_FOUND)
@@ -167,13 +169,15 @@ add_custom_target(
 
 # Dist
 # This generates the dist tarballs
-add_custom_target(
-    dist
-    COMMAND 
-        git archive --prefix=${ARCHIVE_BASE_NAME}/ HEAD
-        | xz -z > ${CMAKE_BINARY_DIR}/${ARCHIVE_FULL_NAME}
-    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
-)
+if (GIT_FOUND)
+    add_custom_target(
+        dist
+        COMMAND
+            ${GIT_EXECUTABLE} archive --prefix=${ARCHIVE_BASE_NAME}/ HEAD
+            | xz -z > ${CMAKE_BINARY_DIR}/${ARCHIVE_FULL_NAME}
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    )
+endif()
 
 # Ubuntu
 # Builds the source Debian package used for the Launchpad PPA
diff --git a/cmake/gitversion.cmake b/cmake/gitversion.cmake
new file mode 100644
index 0000000..303a632
--- /dev/null
+++ b/cmake/gitversion.cmake
@@ -0,0 +1,14 @@
+if (VERSION MATCHES "-dev$")
+    find_package(Git QUIET)
+    if (GIT_FOUND)
+        execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags
+                        WORKING_DIRECTORY ${SRC_DIR}
+                        OUTPUT_VARIABLE "GIT_VERSION"
+                        OUTPUT_STRIP_TRAILING_WHITESPACE
+                        ERROR_QUIET)
+        string(REGEX REPLACE "^geary-([0-9\\.]*)-([0-9]*)-(.*)" "\\1+\\2~\\3" GIT_VERSION "${GIT_VERSION}")
+        set(VERSION ${GIT_VERSION})
+    endif()
+endif()
+
+configure_file("${SRC_DIR}/geary-version.vala.in" "${DST_DIR}/geary-version.vala")
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index fadefbb..9972277 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -306,6 +306,8 @@ engine/util/util-string.vala
 engine/util/util-synchronization.vala
 engine/util/util-time.vala
 engine/util/util-trillian.vala
+
+${CMAKE_BINARY_DIR}/geary-version.vala
 )
 
 set(CLIENT_SRC
@@ -499,6 +501,15 @@ pkg_check_modules(DEPS REQUIRED
     ${EXTRA_CLIENT_PKG_CONFIG}
 )
 
+add_custom_target(git-version
+    COMMAND ${CMAKE_COMMAND}
+    -DSRC_DIR=${CMAKE_CURRENT_SOURCE_DIR}
+    -DDST_DIR=${CMAKE_BINARY_DIR}
+    -DVERSION=${VERSION}
+    -P ${CMAKE_CURRENT_SOURCE_DIR}/../cmake/gitversion.cmake
+    BYPRODUCTS ${CMAKE_BINARY_DIR}/geary-version.vala
+)
+
 set(ENGINE_PACKAGES
     glib-2.0 gee-0.8 gio-2.0 gmime-2.6 posix sqlite3 libxml-2.0
 )
@@ -515,10 +526,9 @@ set(CONSOLE_PACKAGES
 
 set(GSETTINGS_DIR ${CMAKE_SOURCE_DIR}/desktop)
 
-set(CFLAGS 
+set(CFLAGS
     ${DEPS_CFLAGS}
     ${DEPS_CFLAGS_OTHER}
-    -D_VERSION=\"${VERSION}\"
     -D_INSTALL_PREFIX=\"${CMAKE_INSTALL_PREFIX}\"
     -D_SOURCE_ROOT_DIR=\"${CMAKE_SOURCE_DIR}\"
     -D_GSETTINGS_DIR=\"${CMAKE_BINARY_DIR}/gsettings\"
@@ -591,6 +601,7 @@ OPTIONS
 )
 
 add_library(geary-static STATIC ${ENGINE_VALA_C})
+add_dependencies(geary-static git-version)
 target_link_libraries(geary-static ${DEPS_LIBRARIES} sqlite3-unicodesn gthread-2.0)
 
 # WebKitGTK VAPI generation
@@ -630,7 +641,7 @@ add_custom_command(
     TARGET
         geary
     POST_BUILD
-    COMMAND 
+    COMMAND
         ${CMAKE_COMMAND} -E copy geary ${CMAKE_BINARY_DIR}/
 )
 
diff --git a/src/client/application/geary-application.vala b/src/client/application/geary-application.vala
index 6267958..6d7e0b6 100644
--- a/src/client/application/geary-application.vala
+++ b/src/client/application/geary-application.vala
@@ -5,7 +5,6 @@
  */
 
 // Defined by CMake build script.
-extern const string _VERSION;
 extern const string _INSTALL_PREFIX;
 extern const string _GSETTINGS_DIR;
 extern const string _SOURCE_ROOT_DIR;
@@ -20,8 +19,8 @@ public class GearyApplication : Gtk.Application {
     public const string WEBSITE = "https://wiki.gnome.org/Apps/Geary";;
     public const string WEBSITE_LABEL = _("Visit the Geary web site");
     public const string BUGREPORT = "https://wiki.gnome.org/Apps/Geary/ReportingABug";;
-    
-    public const string VERSION = _VERSION;
+
+    public const string VERSION = Geary.Version.GEARY_VERSION;
     public const string INSTALL_PREFIX = _INSTALL_PREFIX;
     public const string GSETTINGS_DIR = _GSETTINGS_DIR;
     public const string SOURCE_ROOT_DIR = _SOURCE_ROOT_DIR;
diff --git a/src/console/main.vala b/src/console/main.vala
index 7d0ba12..1523d66 100644
--- a/src/console/main.vala
+++ b/src/console/main.vala
@@ -4,8 +4,6 @@
  * (version 2.1 or later).  See the COPYING file in this distribution.
  */
 
-// Defined by CMake build script.
-extern const string _VERSION;
 
 errordomain CommandException {
     USAGE,
@@ -13,8 +11,6 @@ errordomain CommandException {
 }
 
 class ImapConsole : Gtk.Window {
-    public const string VERSION = _VERSION;
-    
     private const int KEEPALIVE_SEC = 60 * 10;
     
     private Gtk.TextView console = new Gtk.TextView();
@@ -424,8 +420,8 @@ class ImapConsole : Gtk.Window {
         
         Gee.HashMap<string, string> fields = new Gee.HashMap<string, string>();
         fields.set("name", "geary-console");
-        fields.set("version", VERSION);
-        
+        fields.set("version", Geary.Version.GEARY_VERSION);
+
         cx.send_async.begin(new Geary.Imap.IdCommand(fields), null, on_id);
     }
     
diff --git a/src/geary-version.vala.in b/src/geary-version.vala.in
new file mode 100644
index 0000000..42a45a3
--- /dev/null
+++ b/src/geary-version.vala.in
@@ -0,0 +1,9 @@
+/* Copyright 2016 Software Freedom Conservancy Inc.
+ *
+ * This software is licensed under the GNU Lesser General Public License
+ * (version 2.1 or later).  See the COPYING file in this distribution.
+ */
+
+namespace Geary.Version {
+public const string GEARY_VERSION = "@VERSION@";
+}
\ No newline at end of file