bshell: re-organise build into three separate components

bshell: the front-end binary
bshell.runtime: contains the parser, compiler, and classes needed to run bshell scripts
bshell.core: contains the builtin commandlets and aliases

bshell.runtime/include/bshell/command/alias.h

@@ -0,0 +1,35 @@
+#ifndef BSHELL_COMMAND_ALIAS_H_
+#define BSHELL_COMMAND_ALIAS_H_
+
+#include "../verb.h"
+
+#include <fx/macros.h>
+#include <fx/string.h>
+
+FX_DECLS_BEGIN;
+
+struct bshell_runtime;
+
+#define BSHELL_TYPE_ALIAS (bshell_alias_get_type())
+
+FX_DECLARE_TYPE(bshell_alias);
+
+FX_TYPE_CLASS_DECLARATION_BEGIN(bshell_alias)
+	const char *a_callable_name;
+	const char *a_target_name;
+	const char *(*a_get_callable_name)(const bshell_alias *);
+	const char *(*a_get_target_name)(const bshell_alias *);
+FX_TYPE_CLASS_DECLARATION_END(bshell_alias)
+
+extern fx_type_id bshell_alias_get_type(void);
+
+extern enum bshell_status bshell_alias_get_callable_name(
+	const bshell_alias *alias,
+	fx_string *out);
+extern enum bshell_status bshell_alias_get_target_name(
+	const bshell_alias *alias,
+	fx_string *out);
+
+FX_DECLS_END;
+
+#endif