From 6eafdbb205128140e5ddba5a871f86ab008fb361 Mon Sep 17 00:00:00 2001
From: Jan Tojnar <jtojnar@gmail.com>
Date: Mon, 7 Jan 2019 16:39:04 +0100
Subject: build: Fix path handling in pkgconfig

On Nix, headers, introspection files and vapi files are installed to different
prefix than the library. This makes sure that the correct paths are used, thus
making the build more portable.
---
 bindings/vala/meson.build | 10 ++--------
 meson.build               | 28 +++++++++++++++++++++++-----
 src/meson.build           |  2 ++
 3 files changed, 27 insertions(+), 13 deletions(-)

diff --git a/bindings/vala/meson.build b/bindings/vala/meson.build
index 3190f00..9c2d9c0 100644
--- a/bindings/vala/meson.build
+++ b/bindings/vala/meson.build
@@ -5,13 +5,6 @@
 #
 # Copyright (C) 2016 Igalia S.L. All rights reserved.
 
-vapidir = join_paths([
-    prefix,
-    get_option('datadir'),
-    'vala',
-    'vapi',
-])
-
 vala_sources = [ # LIBRARY, GIR, DEPS
     ['grilo-@0@'.format(grl_majorminor), grl_gir[0], ['gmodule-2.0', 'gio-2.0']],
     ['grilo-net-@0@'.format(grl_majorminor), grlnet_gir[0], ['gio-2.0']],
@@ -26,6 +19,7 @@ foreach s: vala_sources
     gnome.generate_vapi(lib,
         sources: [custom_vala, gir],
         packages: deps,
-        install: true)
+        install: true,
+        install_dir: vapidir)
 endforeach
 
diff --git a/meson.build b/meson.build
index 295939c..4a1c660 100644
--- a/meson.build
+++ b/meson.build
@@ -63,7 +63,7 @@ endif
 
 enable_vala = get_option('vapi')
 if enable_vala
-    vapigen = find_program('vapigen', required: true)
+    find_program('vapigen', required: true)
 endif
 
 enable_testui = get_option('test_ui')
@@ -73,9 +73,27 @@ if enable_testui
 endif
 
 prefix = get_option('prefix')
+includedir = join_paths(prefix, get_option('includedir'))
 libdir = join_paths(prefix, get_option('libdir'))
 plugins_dir = join_paths(libdir, grl_name)
 localedir = join_paths(prefix, get_option('localedir'))
+datadir = join_paths(prefix, get_option('datadir'))
+
+gobject_introspection = dependency('gobject-introspection-1.0', required: false)
+if gobject_introspection.found()
+    girdir = gobject_introspection.get_pkgconfig_variable('girdir', define_variable: ['datadir', datadir])
+    typelibdir = gobject_introspection.get_pkgconfig_variable('typelibdir', define_variable: ['libdir', libdir])
+else
+    girdir = join_paths(datadir, 'gir-1.0')
+    typelibdir = join_paths(libdir, 'girepository-1.0')
+endif
+
+vapigen = dependency('vapigen', required: false)
+if vapigen.found()
+    vapidir = vapigen.get_pkgconfig_variable('vapidir', define_variable: ['datadir', datadir])
+else
+    vapidir = join_paths(datadir, 'vala', 'vapi')
+endif
 
 cdata = configuration_data()
 cdata.set_quoted('VERSION', grilo_version)
@@ -99,11 +117,11 @@ pkgconf = configuration_data()
 pkgconf.set('prefix', prefix)
 pkgconf.set('exec_prefix', '${prefix}')
 pkgconf.set('libdir', libdir)
-pkgconf.set('includedir', '${prefix}/@0@'.format(get_option('includedir')))
+pkgconf.set('includedir', join_paths('${prefix}', includedir))
 pkgconf.set('GRL_NAME', grl_name)
 pkgconf.set('GRL_PLUGINS_DIR', plugins_dir)
-pkgconf.set('INTROSPECTION_GIRDIR', '${datarootdir}/gir-1.0')
-pkgconf.set('INTROSPECTION_TYPELIBDIR', '${libdir}/girepository-1.0'.format(get_option('libdir')))
+pkgconf.set('INTROSPECTION_GIRDIR', join_paths('${prefix}', girdir))
+pkgconf.set('INTROSPECTION_TYPELIBDIR', join_paths('${prefix}', typelibdir))
 pkgconf.set('VERSION', grilo_version)
 pkgconf.set('GRLNET_VERSION', grlnet_version)
 pkgconf.set('GRLPLS_VERSION', grlpls_version)
@@ -114,7 +132,7 @@ foreach p: pkgconfig_files
     configure_file(input: infile,
         output: outfile,
         configuration: pkgconf,
-        install_dir: '@0@/pkgconfig'.format(get_option('libdir')))
+        install_dir: join_paths(libdir, 'pkgconfig'))
 endforeach
 
 gnome = import('gnome')
diff --git a/src/meson.build b/src/meson.build
index 36c34b3..2eb46f6 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -120,5 +120,7 @@ if enable_gir
         dependencies: [ gobject_dep, gmodule_dep, gio_dep ],
         includes: [ 'GObject-2.0', 'GModule-2.0', 'Gio-2.0' ],
         install: true,
+        install_dir_gir: girdir,
+        install_dir_typelib: typelibdir,
         extra_args: gir_extra_args)
 endif
-- 
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