add meson args and env support

Author: nor

src/projects/mesonproject.vala

@@ -27,6 +27,9 @@ class Vls.MesonProject : Project {
     private string build_dir;
     private bool configured_once;
     private bool requires_general_build;
+    private string[] special_args = {};
+    private string[] special_comp = {};
+    private string[] special_envp = {};
 
     /**
      * Substitute special arguments like `@INPUT@` and `@OUTPUT@` as they
@@ -292,10 +295,14 @@ class Vls.MesonProject : Project {
         debug ("%sconfiguring build dir %s ...", configured_once ? "re" : "", build_dir);
         if (configured_once)
             spawn_args += "--reconfigure";
+        foreach(var item in special_comp) {
+            warning("meson setup arg %s", item);
+            spawn_args += item;
+        }
         Process.spawn_sync (
             build_dir,
             spawn_args, 
-            null, 
+            special_envp, 
             SpawnFlags.SEARCH_PATH, 
             null,
             out proc_stdout,
@@ -761,10 +768,15 @@ class Vls.MesonProject : Project {
         if (requires_general_build) {
             int proc_status;
             string proc_stdout, proc_stderr;
+            string[] spwan_args = {"meson", "compile"};
+            foreach(var item in special_comp) {
+                warning("meson compile arg %s", item);
+                spwan_args += item;
+            }
 
             Process.spawn_sync (build_dir,
-                                {"meson", "compile"},
-                                null,
+                                spwan_args,
+                                special_envp,
                                 SpawnFlags.SEARCH_PATH,
                                 null,
                                 out proc_stdout,
@@ -783,6 +795,38 @@ class Vls.MesonProject : Project {
 
     public MesonProject (string root_path, FileCache file_cache, Cancellable? cancellable = null) throws Error {
         base (root_path, file_cache);
+        // read system envionment;
+        string[] system_env_key = Environment.list_variables();
+        if (system_env_key != null) {
+            foreach(var item in system_env_key) {
+                var sys_env = item+"="+Environment.get_variable(item);
+                debug("system env is %s", sys_env);
+                special_envp += sys_env;
+            }
+        }
+        // get config from settings.json
+        var check_path = root_path + "/.vscode/settings.json";
+        warning("meson check option at %s", check_path);
+        var settings_json = File.new_for_path(check_path);
+        if (settings_json.query_exists()) {
+            var dis = new DataInputStream(settings_json.read());
+            var settings_json_parser = new Json.Parser();
+            settings_json_parser.load_from_stream(dis);
+            var root_node = settings_json_parser.get_root();
+            var root_object = root_node.get_object();
+            var ret_options = root_object.get_array_member("mesonbuild.configureOptions");
+            foreach(var option in ret_options.get_elements()) {
+                var opt = option.get_string();
+                special_args += opt;
+            }
+            var compile_options = root_object.get_array_member("mesonbuild.compileOptions");
+            foreach(var option in compile_options.get_elements()) {
+                var opt = option.get_string();
+                special_comp += opt;
+            }
+            // maybe can reuse mesonbuild buildDir
+            // this.build_dir = root_object.get_string_member_with_default("mesonbuild.buildFolder", root_path +"/builddir");
+        }
         this.build_dir = DirUtils.make_tmp (@"vls-meson-$(str_hash (root_path))-XXXXXX");
         reconfigure_if_stale (cancellable);
     }