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add 'help' command

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Luna 2021-04-03 23:20:17 -03:00
parent 32b01976d8
commit 73c5214146
1 changed files with 16 additions and 3 deletions
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19
src/main.zig
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@ -230,6 +230,13 @@ pub fn doRepl(allocator: *std.mem.Allocator, args_it: anytype) !void {
} }
} }
fn doHelp() void {
std.debug.warn("scritcher!\n", .{});
std.debug.warn("usage: scritcher [run|help|repl]\n", .{});
std.debug.warn("\tscritcher run path_to_script.scri path_to_input_file.bmp\n", .{});
std.debug.warn("\tscritcher repl path_to_script.scri path_to_input_file.bmp\n", .{});
}
pub fn main() !void { pub fn main() !void {
// const allocator = std.heap.page_allocator; // const allocator = std.heap.page_allocator;
var allocator_instance = std.heap.GeneralPurposeAllocator(.{}){}; var allocator_instance = std.heap.GeneralPurposeAllocator(.{}){};
@ -248,11 +255,16 @@ pub fn main() !void {
// TODO print help // TODO print help
_ = args_it.skip(); _ = args_it.skip();
const cli_command = try (args_it.next(allocator) orelse @panic("expected 'run', 'help', or 'repl'")); const cli_command_opt = args_it.next(allocator);
if (cli_command_opt == null) {
return doHelp();
}
const cli_command = try cli_command_opt.?;
defer allocator.free(cli_command); defer allocator.free(cli_command);
if (std.mem.eql(u8, cli_command, "help")) { if (std.mem.eql(u8, cli_command, "help")) {
//return try doHelp(); return doHelp();
} else if (std.mem.eql(u8, cli_command, "repl")) { } else if (std.mem.eql(u8, cli_command, "repl")) {
return try doRepl(allocator, &args_it); return try doRepl(allocator, &args_it);
} else if (std.mem.eql(u8, cli_command, "run")) { } else if (std.mem.eql(u8, cli_command, "run")) {
@ -274,6 +286,7 @@ pub fn main() !void {
try runner.runCommands(cmds, true); try runner.runCommands(cmds, true);
} else { } else {
@panic("expected 'run', 'help', or 'repl'"); std.debug.warn("unknown command: '{s}'\n", .{cli_command});
return error.UnknownCommand;
} }
} }