build(c/driver-manager): Add support to build Vala bindings

Vala VAPI file is generated for current GADBC 1.0 API version.

It is disable by default, but recommended to be enable when
a development package is distributed.

This commit force a 1.0 API versioning, replacing the old one
where 0 were used for GIR API version (gir_version), so now
shows '1.0' instead of '0.0'.

Also examples are provided.

glib/adbc-glib/meson.build

@@ -86,7 +86,8 @@ pkgconfig.generate(libadbc_glib,
                    variables: pkgconfig_variables,
                    version: meson.project_version())
 
-adbc_glib_gir = gnome.generate_gir(libadbc_glib,
+if have_gi
+  adbc_glib_gir = gnome.generate_gir(libadbc_glib,
                                    export_packages: 'adbc-glib',
                                    extra_args: [
                                      '--warn-all',
@@ -102,3 +103,10 @@ adbc_glib_gir = gnome.generate_gir(libadbc_glib,
                                    nsversion: api_version,
                                    sources: sources + definition_headers + enums,
                                    symbol_prefix: 'gadbc')
+  if generate_vapi
+    adbc_glib_vapi = gnome.generate_vapi('adbc-glib',
+                                          install: true,
+                                          packages: ['gobject-2.0'],
+                                          sources: [adbc_glib_gir[0]])
+  endif
+endif

glib/example/README.md

@@ -0,0 +1,48 @@
+<!---
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements.  See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership.  The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied.  See the License for the
+  specific language governing permissions and limitations
+  under the License.
+-->
+
+# Arrow GLib example
+
+There are example codes in this directory.
+
+C example codes exist in this directory. Language bindings example
+codes exists in sub directories. For example, Lua example codes exists
+in `lua/` sub directory.
+
+## C example codes
+
+Here are example codes in this directory:
+
+  * `build.c`: It shows how to create an array by array builder.
+
+<!---
+  * `write-file.c`: It shows how to write Arrow array to file in file
+    format.
+-->
+
+  * `read-file.c`: It shows how to read Arrow array from file in file
+    format.
+
+<!---
+  * `write-stream.c`: It shows how to write Arrow array to file in
+    stream format.
+-->
+
+  * `read-stream.c`: It shows how to read Arrow array from file in
+    stream format.

glib/example/meson.build

@@ -0,0 +1,27 @@
+# -*- indent-tabs-mode: nil -*-
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+executable('sqlite', 'sqlite.c',
+           dependencies: [adbc_glib],
+           link_language: 'c')
+
+install_data('README.md',
+             install_dir: join_paths(data_dir, meson.project_name(), 'example'))
+
+subdir('vala')

glib/example/sqlite.c

@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <stdlib.h>
+
+#include <adbc-glib/adbc-glib.h>
+
+int main(int argc, char** argv) {
+  GADBCDatabase* database;
+  GADBCConnection* conn;
+  GError* error = NULL;
+
+  database = gadbc_database_new(&error);
+
+  if (error != NULL) {
+    g_print("Error creating a Database: %s", error->message);
+    return 1;
+  }
+
+  gadbc_database_set_option(database, "driver", "adbc_driver_sqlite", &error);
+
+  if (error != NULL) {
+    g_print("Error initializing the database: %s", error->message);
+    return 1;
+  }
+
+  gadbc_database_set_option(database, "uri", "test.db", &error);
+
+  if (error != NULL) {
+    g_print("Error initializing the database: %s", error->message);
+    return 1;
+  }
+
+  gadbc_database_init(database, &error);
+
+  if (error != NULL) {
+    g_print("Error initializing the database: %s", error->message);
+    return 1;
+  }
+
+  conn = gadbc_connection_new(&error);
+
+  if (error != NULL) {
+    g_print("Error creating a Connection: %s", error->message);
+    return 1;
+  }
+
+  gadbc_connection_init(conn, database, &error);
+
+  if (error != NULL) {
+    g_print("Error initializing a Connection: %s", error->message);
+    return 1;
+  }
+
+  return EXIT_SUCCESS;
+}

glib/example/vala/README.md

@@ -0,0 +1,36 @@
+<!---
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements.  See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership.  The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied.  See the License for the
+  specific language governing permissions and limitations
+  under the License.
+-->
+
+# ADBC Vala example
+
+There are Vala example codes in this directory.
+
+## How to build
+
+Here is a command line to build an example in this directory:
+
+```console
+$ valac --pkg adbc-glib --pkg posix XXX.vala
+```
+
+## Vala example codes
+
+Here are example codes in this directory:
+
+  * `build.vala`: It shows how to create an array by array builder.

glib/example/vala/meson.build

@@ -0,0 +1,42 @@
+# -*- indent-tabs-mode: nil -*-
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+if generate_vapi
+  vala_example_executable_kwargs = {
+    'c_args': [
+      '-I' + meson.build_root(),
+      '-I' + meson.source_root(),
+    ],
+    'dependencies': [
+      adbc_glib_vapi,
+      dependency('gobject-2.0'),
+    ],
+    'vala_args': [
+      '--pkg', 'posix',
+    ],
+  }
+  executable('sqlite', 'sqlite.vala',
+             kwargs: vala_example_executable_kwargs)
+endif
+
+install_data('README.md',
+             install_dir: join_paths(data_dir,
+                                     meson.project_name(),
+                                     'example',
+                                     'vala'))

glib/example/vala/sqlite.vala

@@ -0,0 +1,33 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+
+int main (string[] args) {
+    try {
+    	var database = new GADBC.Database ();
+    	database.set_option ("driver", "adbc_driver_sqlite");
+  	database.set_option ("uri", "test.db");
+    	database.init ();
+    	var conn = new GADBC.Connection ();
+    	conn.init (database);
+    }
+    catch (GLib.Error e) {
+    	GLib.message ("Error: %s", e.message);
+    }
+
+    return Posix.EXIT_SUCCESS;
+}

glib/meson.build

@@ -30,7 +30,7 @@ version_major = version_numbers[0].to_int()
 version_minor = version_numbers[1].to_int()
 version_micro = version_numbers[2].to_int()
 
-api_version = '@0@.0'.format(version_major)
+api_version = '1.0'
 so_version = version_major
 library_version = '.'.join(version_numbers)
 
@@ -39,6 +39,7 @@ include_dir = get_option('includedir')
 project_include_sub_dir = meson.project_name()
 data_dir = get_option('datadir')
 gir_dir = prefix / data_dir / 'gir-1.0'
+vapi_dir = data_dir / 'vala' / 'vapi'
 
 gnome = import('gnome')
 pkgconfig = import('pkgconfig')
@@ -67,7 +68,15 @@ else
                                                 dirs: [adbc_build_dir])
 endif
 
+have_gi = dependency('gobject-introspection-1.0', required: false).found()
+generate_vapi = have_gi and get_option('vapi')
+if generate_vapi
+  pkgconfig_variables += ['vapidir=@0@'.format(vapi_dir)]
+  add_languages('vala')
+endif
+
 subdir('adbc-glib')
+subdir('example')
 
 install_data('../LICENSE.txt',
              'README.md',

glib/meson_options.txt

@@ -21,3 +21,8 @@ option('adbc_build_dir',
        type: 'string',
        value: '',
        description: 'Use this option to build with not installed ADBC')
+
+option('vapi',
+       type: 'boolean',
+       value: false,
+       description: 'Build Vala API')