[libgit2-glib/wip/inigomartinez/meson: 11/13] meson: Use a variable for the namespace string

[Iñigo Martínez <inigomartinez src gnome org>]

commit 4a4bf65692d359215da0481fa6bb3d42bc2ee04b
Author: Iñigo Martínez <inigomartinez gmail com>
Date:   Fri Jan 19 16:50:03 2018 +0100

    meson: Use a variable for the namespace string
    
    The namespace string is used in multiple places in the meson's build
    files.
    
    This patch uses a variable which eases the use of this string
    through the build files.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=792699

 libgit2-glib/meson.build |    8 ++++----
 meson.build              |    2 ++
 2 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/libgit2-glib/meson.build b/libgit2-glib/meson.build
index 55918f6..91ffa78 100644
--- a/libgit2-glib/meson.build
+++ b/libgit2-glib/meson.build
@@ -207,7 +207,7 @@ libgit2_glib = shared_library('git2-glib-@0@'.format(libgit2_glib_api_version),
   soversion: soversion,
   install: true,
   dependencies: platform_deps,
-  c_args: extra_args + [ '-DG_LOG_DOMAIN="Ggit"' ],
+  c_args: extra_args + [ '-DG_LOG_DOMAIN="@0@"'.format(libgit2_glib_ns) ],
   link_args: libgit2_glib_link_args)
 
 pkg.generate(
@@ -232,10 +232,10 @@ libgit2_glib_dep = declare_dependency(link_with: libgit2_glib,
 if enable_gir
   gnome.generate_gir(libgit2_glib,
                      sources: headers + sources,
-                     namespace: 'Ggit',
+                     namespace: libgit2_glib_ns,
                      nsversion: libgit2_glib_api_version,
-                     identifier_prefix: 'Ggit',
-                     symbol_prefix: 'ggit',
+                     identifier_prefix: libgit2_glib_ns,
+                     symbol_prefix: libgit2_glib_ns.to_lower(),
                      includes: [ 'GObject-2.0', 'GLib-2.0', 'Gio-2.0' ],
                      header: ggit_h,
                      install: true)
diff --git a/meson.build b/meson.build
index c7a28cd..043fb0b 100644
--- a/meson.build
+++ b/meson.build
@@ -15,6 +15,8 @@ libgit2_glib_micro_version = version_array[2].to_int()
 libgit2_glib_api_version = '1.0'
 libgit2_glib_api_name = '@0@-@1@'.format(meson.project_name(), libgit2_glib_api_version)
 
+libgit2_glib_ns = 'Ggit'
+
 libgit2_glib_buildtype = get_option('buildtype')
 
 # The interface age is reset every time we add new API; this