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path: root/src/cmd/rename.zig
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const std = @import("std");
const Allocator = std.mem.Allocator;
const print = std.debug.print;

const syntax = @import("../syntax.zig");
const FileSpec = syntax.FileSpec;

const types = @import("./lib/types.zig");
const CommandStatus = types.CommandStatus;
const OutputCapture = types.OutputCapture;
const InputSource = types.InputSource;

pub const Rename = struct {
    from: FileSpec,
    to: FileSpec,

    pub fn eval(rename: Rename, allocator: Allocator, output_capture: ?*OutputCapture, input_source: ?*InputSource) !CommandStatus {
        _ = allocator;
        _ = input_source;

        const from_path = switch (rename.from) {
            .Con, .Lpt1, .Lpt2, .Lpt3, .Prn => {
                const error_msg = "Cannot rename device\n";
                if (output_capture) |capture| {
                    try capture.write(error_msg);
                } else {
                    print("{s}", .{error_msg});
                }
                return CommandStatus{ .Code = 1 };
            },
            .Path => |path| path,
        };

        const to_path = switch (rename.to) {
            .Con, .Lpt1, .Lpt2, .Lpt3, .Prn => {
                const error_msg = "Cannot rename to device\n";
                if (output_capture) |capture| {
                    try capture.write(error_msg);
                } else {
                    print("{s}", .{error_msg});
                }
                return CommandStatus{ .Code = 1 };
            },
            .Path => |path| path,
        };

        std.fs.cwd().rename(from_path, to_path) catch |err| {
            const error_msg = switch (err) {
                error.FileNotFound => "The system cannot find the file specified\n",
                error.AccessDenied => "Access denied\n",
                error.PathAlreadyExists => "A duplicate file name exists, or the file cannot be found\n",
                error.RenameAcrossMountPoints => "Cannot rename across different drives\n",
                else => "Cannot rename file\n",
            };
            if (output_capture) |capture| {
                try capture.write(error_msg);
            } else {
                print("{s}", .{error_msg});
            }
            return CommandStatus{ .Code = 1 };
        };

        // No output for successful rename (DOS style)
        return CommandStatus{ .Code = 0 };
    }
};