runtime: move variable definition from runtime to individual scopes

bshell.runtime/runtime/eval.c

@@ -4,6 +4,7 @@
 #include <bshell/runtime/cmdcall.h>
 #include <bshell/runtime/pipeline.h>
 #include <bshell/runtime/runtime.h>
+#include <bshell/runtime/scope.h>
 #include <bshell/status.h>
 #include <fx/collections/array.h>
 #include <fx/collections/hashtable.h>
@@ -250,7 +251,9 @@ static enum bshell_status eval_instruction(
 		fx_value_get_cstr(pool_value, &s);
 		var = bshell_runtime_find_var(rt, s);
 		if (!var) {
-			var = bshell_runtime_define_var(rt, s);
+			var = bshell_runtime_scope_define_variable(
+				bshell_runtime_get_current_scope(rt),
+				s);
 		}
 
 		bshell_variable_set_value(var, x);

bshell.runtime/runtime/runtime.c

@@ -68,24 +68,6 @@ bshell_variable *bshell_runtime_find_var(
 	return var;
 }
 
-bshell_variable *bshell_runtime_define_var(
-	struct bshell_runtime *rt,
-	const char *name)
-{
-	struct bshell_runtime_scope *scope = runtime_get_scope(rt);
-	if (!scope) {
-		return NULL;
-	}
-
-	bshell_variable *var = bshell_variable_create(name);
-	if (!var) {
-		return NULL;
-	}
-
-	var_map_put(&scope->s_vars, var);
-	return var;
-}
-
 enum bshell_status bshell_runtime_define_function(
 	struct bshell_runtime *rt,
 	bshell_function *func)
@@ -149,6 +131,12 @@ bshell_command *bshell_runtime_find_command(
 	return NULL;
 }
 
+struct bshell_runtime_scope *bshell_runtime_get_global_scope(
+	struct bshell_runtime *rt)
+{
+	return rt->rt_global;
+}
+
 struct bshell_runtime_scope *bshell_runtime_get_current_scope(
 	struct bshell_runtime *rt)
 {

bshell.runtime/runtime/scope.c

@@ -116,3 +116,20 @@ fx_hashtable *bshell_runtime_scope_get_functions(
 {
 	return scope->s_functions;
 }
+
+bshell_variable *bshell_runtime_scope_define_variable(
+	struct bshell_runtime_scope *scope,
+	const char *name)
+{
+	if (!scope) {
+		return NULL;
+	}
+
+	bshell_variable *var = bshell_variable_create(name);
+	if (!var) {
+		return NULL;
+	}
+
+	var_map_put(&scope->s_vars, var);
+	return var;
+}

bshell.runtime/runtime/scope.h

@@ -1,5 +1,5 @@
-#ifndef BSHELL_RUNTIME_SCOPE_H_
-#define BSHELL_RUNTIME_SCOPE_H_
+#ifndef RUNTIME_SCOPE_H_
+#define RUNTIME_SCOPE_H_
 
 #include "var-map.h"
 
@@ -37,12 +37,14 @@ extern struct bshell_runtime_scope *runtime_push_scope(
 	enum bshell_runtime_scope_type type,
 	bshell_scriptblock *block);
 extern void runtime_pop_scope(struct bshell_runtime *rt);
-extern struct bshell_runtime_scope *runtime_get_scope(struct bshell_runtime *rt);
+extern struct bshell_runtime_scope *runtime_get_scope(
+	struct bshell_runtime *rt);
 
 extern void bshell_runtime_scope_push_value(
 	struct bshell_runtime_scope *scope,
 	const fx_value *value);
-extern fx_value bshell_runtime_scope_pop_value(struct bshell_runtime_scope *scope);
+extern fx_value bshell_runtime_scope_pop_value(
+	struct bshell_runtime_scope *scope);
 
 extern void bshell_runtime_scope_set_block(
 	struct bshell_runtime_scope *scope,