Add meson build support

Mostly copied from

geany/geany-plugins#1345

meson.build

@@ -0,0 +1,90 @@
+project(
+  'geany-lsp',
+  'c',
+  license : 'GPL-2.0',
+  version : '2.1'
+)
+
+plugin_name = 'lsp'
+
+i18n = import('i18n')
+# define GETTEXT_PACKAGE
+add_project_arguments('-DGETTEXT_PACKAGE="intltest"', language:'c')
+i18n.gettext(meson.project_name())
+
+subdir('meson_config')
+
+
+geany_dep = dependency('geany')
+
+plugin_suffix = []
+if (host_machine.system() == 'darwin')
+	plugin_suffix = 'so'  # use "so" instead of "dylib" so Geany finds plugins correctly
+endif
+
+plugin_inc = [include_directories('lsp/deps/json-glib', 'lsp/deps/jsonrpc-glib', 'lsp/deps', 'lsp/src')]
+
+shared_module('lsp',
+	'lsp/deps/json-glib/json-array.c',
+	'lsp/deps/json-glib/json-builder.c',
+	'lsp/deps/json-glib/json-debug.c',
+	'lsp/deps/json-glib/json-gboxed.c',
+	'lsp/deps/json-glib/json-generator.c',
+	'lsp/deps/json-glib/json-gobject.c',
+	'lsp/deps/json-glib/json-gvariant.c',
+	'lsp/deps/json-glib/json-node.c',
+	'lsp/deps/json-glib/json-object.c',
+	'lsp/deps/json-glib/json-parser.c',
+	'lsp/deps/json-glib/json-path.c',
+	'lsp/deps/json-glib/json-reader.c',
+	'lsp/deps/json-glib/json-scanner.c',
+	'lsp/deps/json-glib/json-serializable.c',
+	'lsp/deps/json-glib/json-utils.c',
+	'lsp/deps/json-glib/json-value.c',
+
+	'lsp/deps/jsonrpc-glib/jsonrpc-client.c',
+	'lsp/deps/jsonrpc-glib/jsonrpc-input-stream.c',
+	'lsp/deps/jsonrpc-glib/jsonrpc-message.c',
+	'lsp/deps/jsonrpc-glib/jsonrpc-output-stream.c',
+	'lsp/deps/jsonrpc-glib/jsonrpc-server.c',
+	'lsp/deps/jsonrpc-glib/jsonrpc-marshalers.c',
+
+	'lsp/src/lsp-autocomplete.c',
+	'lsp/src/lsp-main.c',
+	'lsp/src/lsp-server.c',
+	'lsp/src/lsp-sync.c',
+	'lsp/src/lsp-rpc.c',
+	'lsp/src/lsp-diagnostics.c',
+	'lsp/src/lsp-hover.c',
+	'lsp/src/lsp-signature.c',
+	'lsp/src/lsp-log.c',
+	'lsp/src/lsp-goto.c',
+	'lsp/src/lsp-progress.c',
+	'lsp/src/lsp-symbols.c',
+	'lsp/src/lsp-symbol-kinds.c',
+	'lsp/src/lsp-semtokens.c',
+	'lsp/src/lsp-goto-panel.c',
+	'lsp/src/lsp-goto-anywhere.c',
+	'lsp/src/lsp-format.c',
+	'lsp/src/lsp-highlight.c',
+	'lsp/src/lsp-rename.c',
+	'lsp/src/lsp-command.c',
+	'lsp/src/lsp-code-lens.c',
+	'lsp/src/lsp-symbol.c',
+	'lsp/src/lsp-extension.c',
+	'lsp/src/lsp-utils.c',
+	'lsp/src/lsp-workspace-folders.c',
+	name_prefix: '',  # "lib" seems to be the default prefix
+	name_suffix: plugin_suffix,
+	include_directories: plugin_inc,
+	c_args: ['-DJSON_COMPILATION', '-DJSONRPC_GLIB_COMPILATION'],
+	dependencies: [config_dep, geany_dep],
+	install_dir: plugin_path,
+	install: true
+)
+
+
+lsp_conf = [
+	'lsp/data/lsp.conf',
+]
+install_data(sources: lsp_conf, install_dir: plugin_datadir)

meson_config/config.h.in

@@ -0,0 +1,18 @@
+#pragma once
+
+#define VERSION "@version@"
+
+#define GEANY_VERSION "@geany_version@"
+
+#define PLUGIN "@plugin_name@"
+
+#define DOCDIR "@prefix@/@docdir@"
+#define LIBDIR "@prefix@/@libdir@"
+#define LOCALEDIR "@prefix@/@localedir@"
+
+#define GEANYPLUGINS_DATADIR "@prefix@/@plugin_datadir@"
+#define DBGPLUG_DATA_DIR "@prefix@/@plugin_datadir@"
+#define PLUGINDATADIR "@prefix@/@plugin_datadir@"
+
+#define PLUGINDOCDIR "@prefix@/@plugin_docdir@"
+#define PLUGINHTMLDOCDIR "@prefix@/@plugin_docdir@/html"

meson_config/meson.build

@@ -0,0 +1,38 @@
+docdir = get_option('datadir') / 'doc'
+project_datadir = get_option('datadir') / 'geany-plugins'
+project_libdir = get_option('libdir') / 'geany-plugins'
+project_docdir = docdir / 'geany-plugins'
+
+plugin_datadir = project_datadir / plugin_name
+plugin_libdir = project_libdir / plugin_name
+plugin_docdir = project_docdir / plugin_name
+
+plugin_path = get_option('libdir') / 'geany'
+
+conf_data = configuration_data()
+
+conf_data.set('plugin_name', plugin_name)
+conf_data.set('plugin_path', plugin_path)
+
+conf_data.set('version', meson.project_version())
+conf_data.set('geany_version', '2.0.0')
+
+conf_data.set('prefix', get_option('prefix'))
+conf_data.set('libdir', get_option('libdir'))
+conf_data.set('docdir', docdir)
+conf_data.set('localedir', get_option('localedir'))
+
+conf_data.set('plugin_datadir', plugin_datadir)
+conf_data.set('plugin_libdir', plugin_libdir)
+conf_data.set('plugin_docdir', plugin_docdir)
+
+configure_file(
+  input: 'config.h.in',
+  output: 'config.h',
+  configuration: conf_data,
+)
+
+config_dep = declare_dependency(
+  include_directories: include_directories('.'),
+  compile_args: ['-DHAVE_CONFIG_H'],
+)