[glib-networking/wip/nacho/gnutls-optional: 1/6] Make gnutls optional

[Ignacio Casal Quinteiro <icq src gnome org>]

commit cb8cfd2f040069ded75ce97f583d480d9650082f
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Mon Sep 10 13:01:37 2018 +0200

    Make gnutls optional
    
    We allow to pass -Dgnutls_support=false now. This is
    in preparation to support different backends.
    GNUTLS will continue to be the default enabled backend.

 meson.build                 | 16 ++++++++--
 meson_options.txt           |  1 +
 tls/tests/certificate.c     |  3 +-
 tls/tests/connection.c      |  3 +-
 tls/tests/dtls-connection.c |  3 +-
 tls/tests/file-database.c   |  3 +-
 tls/tests/meson.build       | 74 +++++++++++++++++++++++++++------------------
 7 files changed, 67 insertions(+), 36 deletions(-)
---
diff --git a/meson.build b/meson.build
index c3b69ae..c3ec364 100644
--- a/meson.build
+++ b/meson.build
@@ -74,8 +74,14 @@ if enable_gnome_proxy_support
   gsettings_desktop_schemas_dep = dependency('gsettings-desktop-schemas')
 endif
 
+backends = []
+
 # *** Checks for GnuTLS     ***
-gnutls_dep = dependency('gnutls', version: '>= 3.4.4')
+enable_gnutls_support = get_option('gnutls_support')
+if enable_gnutls_support
+  gnutls_dep = dependency('gnutls', version: '>= 3.4.4')
+  backends += ['gnutls']
+endif
 
 # *** Checks for p11-kit  ***
 enable_pkcs11_support = get_option('pkcs11_support')
@@ -130,7 +136,10 @@ if enable_pkcs11_support
   subdir('tls/pkcs11')
 endif
 
-subdir('tls/gnutls')
+if enable_gnutls_support
+  subdir('tls/gnutls')
+endif
+
 subdir('tls/tests')
 
 # Will automatically pick it up from the cross file if defined
@@ -139,7 +148,8 @@ if gio_querymodules.found()
   meson.add_install_script('meson_post_install.py', gio_querymodules.path(), gio_module_dir)
 endif
 
-output = '\n\n  libproxy support:    ' + enable_libproxy_support.to_string() + '\n'
+output = '\n\n gnutls support:    ' + enable_gnutls_support.to_string() + '\n'
+output += '  libproxy support:    ' + enable_libproxy_support.to_string() + '\n'
 output += '  GNOME proxy support: ' + enable_gnome_proxy_support.to_string() + '\n'
 output += '  PKCS#11 support:     ' + enable_pkcs11_support.to_string() + '\n'
 message(output)
diff --git a/meson_options.txt b/meson_options.txt
index 93b34c0..8089860 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,3 +1,4 @@
+option('gnutls_support', type: 'boolean', value: true, description: 'support for GnuTLS networking 
configration')
 option('libproxy_support', type: 'boolean', value: true, description: 'support for libproxy proxy 
configration')
 option('gnome_proxy_support', type: 'boolean', value: true, description: 'support for GNOME desktop proxy 
configuration')
 option('pkcs11_support', type: 'boolean', value: false, description: 'support for PKCS#11 using p11-kit')
diff --git a/tls/tests/certificate.c b/tls/tests/certificate.c
index cfd5176..3310269 100644
--- a/tls/tests/certificate.c
+++ b/tls/tests/certificate.c
@@ -559,7 +559,8 @@ main (int   argc,
   g_test_init (&argc, &argv, NULL);
 
   g_setenv ("GSETTINGS_BACKEND", "memory", TRUE);
-  g_setenv ("GIO_USE_TLS", "gnutls", TRUE);
+  g_setenv ("GIO_USE_TLS", BACKEND, TRUE);
+  g_assert (g_ascii_strcasecmp (G_OBJECT_TYPE_NAME (g_tls_backend_get_default ()), "GTlsBackend" BACKEND) == 
0);
 
   g_test_add ("/tls/certificate/create-pem", TestCertificate, NULL,
               setup_certificate, test_create_pem, teardown_certificate);
diff --git a/tls/tests/connection.c b/tls/tests/connection.c
index 6087efc..78feadf 100644
--- a/tls/tests/connection.c
+++ b/tls/tests/connection.c
@@ -1995,7 +1995,8 @@ main (int   argc,
   g_test_bug_base ("http://bugzilla.gnome.org/";);
 
   g_setenv ("GSETTINGS_BACKEND", "memory", TRUE);
-  g_setenv ("GIO_USE_TLS", "gnutls", TRUE);
+  g_setenv ("GIO_USE_TLS", BACKEND, TRUE);
+  g_assert (g_ascii_strcasecmp (G_OBJECT_TYPE_NAME (g_tls_backend_get_default ()), "GTlsBackend" BACKEND) == 
0);
 
   g_test_add ("/tls/connection/basic", TestConnection, NULL,
               setup_connection, test_basic_connection, teardown_connection);
diff --git a/tls/tests/dtls-connection.c b/tls/tests/dtls-connection.c
index b9a691c..105b879 100644
--- a/tls/tests/dtls-connection.c
+++ b/tls/tests/dtls-connection.c
@@ -783,7 +783,8 @@ main (int   argc,
   g_test_bug_base ("http://bugzilla.gnome.org/";);
 
   g_setenv ("GSETTINGS_BACKEND", "memory", TRUE);
-  g_setenv ("GIO_USE_TLS", "gnutls", TRUE);
+  g_setenv ("GIO_USE_TLS", BACKEND, TRUE);
+  g_assert (g_ascii_strcasecmp (G_OBJECT_TYPE_NAME (g_tls_backend_get_default ()), "GTlsBackend" BACKEND) == 
0);
 
   g_test_add ("/dtls/connection/basic/blocking", TestConnection, &blocking,
               setup_connection, test_basic_connection, teardown_connection);
diff --git a/tls/tests/file-database.c b/tls/tests/file-database.c
index 3f01912..de9ea14 100644
--- a/tls/tests/file-database.c
+++ b/tls/tests/file-database.c
@@ -545,7 +545,8 @@ main (int   argc,
   g_test_init (&argc, &argv, NULL);
 
   g_setenv ("GSETTINGS_BACKEND", "memory", TRUE);
-  g_setenv ("GIO_USE_TLS", "gnutls", TRUE);
+  g_setenv ("GIO_USE_TLS", BACKEND, TRUE);
+  g_assert (g_ascii_strcasecmp (G_OBJECT_TYPE_NAME (g_tls_backend_get_default ()), "GTlsBackend" BACKEND) == 
0);
 
   g_test_add_func ("/tls/backend/default-database-is-singleton",
                    test_default_database_is_singleton);
diff --git a/tls/tests/meson.build b/tls/tests/meson.build
index f7489f0..60890c6 100644
--- a/tls/tests/meson.build
+++ b/tls/tests/meson.build
@@ -8,9 +8,14 @@ deps = [
   glib_dep,
   gmodule_dep,
   gobject_dep,
-  gnutls_dep
 ]
 
+if enable_gnutls_support
+  deps += [
+    gnutls_dep
+  ]
+endif
+
 cflags = [
   '-DSRCDIR="@0@"'.format(meson.current_source_dir()),
   '-DTOP_BUILDDIR="@0@"'.format(meson.build_root())
@@ -19,7 +24,6 @@ cflags = [
 envs = [
   'G_TEST_SRCDIR=' + meson.current_source_dir(),
   'G_TEST_BUILDDIR=' + meson.current_build_dir(),
-  'GIO_MODULE_DIR=' + join_paths(meson.build_root(), 'tls', 'gnutls')
 ]
 
 test_programs = [
@@ -43,35 +47,47 @@ if enable_pkcs11_support
   ]
 endif
 
-foreach program: test_programs
-  test_conf = configuration_data()
-  test_conf.set('installed_tests_dir', installed_tests_execdir)
-  test_conf.set('program', program[0])
-
-  if enable_installed_tests
-    configure_file(
-      input: test_template,
-      output: program[0] + '.test',
-      install_dir: installed_tests_metadir,
-      configuration: test_conf
+foreach backend: backends
+  foreach program: test_programs
+    program_name = program[0] + '-' + backend
+
+    test_conf = configuration_data()
+    test_conf.set('installed_tests_dir', installed_tests_execdir)
+    test_conf.set('program', program_name)
+
+    if enable_installed_tests
+      configure_file(
+        input: test_template,
+        output: program_name + '.test',
+        install_dir: installed_tests_metadir,
+        configuration: test_conf
+      )
+    endif
+
+    test_cflags = cflags + [
+      '-DBACKEND="@0@"'.format(backend),
+    ]
+
+    exe = executable(
+      program_name,
+      [program[0] + '.c'] + program[1],
+      include_directories: incs,
+      dependencies: program[2],
+      c_args: test_cflags,
+      install: enable_installed_tests,
+      install_dir: installed_tests_execdir
     )
-  endif
-
-  exe = executable(
-    program[0],
-    [program[0] + '.c'] + program[1],
-    include_directories: incs,
-    dependencies: program[2],
-    c_args: cflags,
-    install: enable_installed_tests,
-    install_dir: installed_tests_execdir
-  )
 
-  test(
-    program[0],
-    exe,
-    env: envs
-  )
+    test_envs = envs + [
+      'GIO_MODULE_DIR=' + join_paths(meson.build_root(), 'tls', backend)
+    ]
+
+    test(
+      program_name,
+      exe,
+      env: test_envs
+    )
+  endforeach
 endforeach
 
 if enable_installed_tests