Ritchie Cunningham
fbf70c43b3
Over the past couple of commits, the build process now automates the dependenices you'd normally compile from source. This commit is focused on laying the foundation for scriptable in-game commands using Lua. - sol2 and lua5.4 are the new project dependencies. - Created a new 'LuaProcessor' class to manage a Lua state and eecute scripts. - The 'CommandProcessor' now contains a 'LuaProcessor' instance. - Replaced the hardcoded c++ 'ls' command with a system that executes a '/bin/ls.lua' script from the Virtual File System. - Implemented C++ -> Lua bindings for the 'vfs_node' struct, allowing Lua scripts to inspect the VFS and perform actions (i.e, list files).
66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
#include "command_processor.h"
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#include "vfs.h"
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#include "lua_processor.h"
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CommandProcessor::CommandProcessor(vfs_node* starting_dir) {
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_current_dir = starting_dir;
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_lua = new LuaProcessor();
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}
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CommandProcessor::~CommandProcessor(void) {
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delete _lua;
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}
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vfs_node* CommandProcessor::get_current_dir(void) {
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return _current_dir;
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}
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std::string CommandProcessor::process_command(const std::string& command) {
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/* Trim trailing whitespace. */
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std::string cmd = command;
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size_t end = cmd.find_last_not_of(" \t\n\r");
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cmd = (end == std::string::npos) ? "" : cmd.substr(0, end+1);
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if(command.rfind("cd ", 0) == 0) {
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std::string target_dir_name = command.substr(3);
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if(target_dir_name == "..") {
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if(_current_dir->parent) {
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_current_dir = _current_dir->parent;
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}
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} else if(_current_dir->children.count(target_dir_name)) {
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vfs_node* target_node = _current_dir->children[target_dir_name];
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if(target_node->type == DIR_NODE) {
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_current_dir = target_node;
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} else {
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return "cd: not a directory\n";
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}
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} else {
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return "cd: no such file or directory\n";
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}
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return get_full_path(_current_dir);
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} else if(cmd == "ls") {
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/* Find the root of the VFS to look for the /bin directory. */
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vfs_node* root = _current_dir;
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while(root->parent != nullptr) {
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root = root->parent;
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}
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fprintf(stderr, "DEBUG: VFS root found, name: '%s'\n", root->name.c_str());
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/* Find and execute the ls.lua script. */
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if(root->children.count("bin")) {
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fprintf(stderr, "DEBUG: Found '/bin' directory.\n");
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vfs_node* bin_dir = root->children["bin"];
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if(bin_dir->children.count("ls.lua")) {
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fprintf(stderr, "DEBUG: Found '/bin/ls.lua'. Executing.\n");
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vfs_node* ls_script_node = bin_dir->children["ls.lua"];
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return _lua->execute(ls_script_node->content, _current_dir);
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}
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}
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fprintf(stderr, "DEBUG: 'ls' command failed to find '/bin/ls.lua'.\n");
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return "ls: command not found\n";
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}
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return "Unknown command: " + command + "\n";
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}
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