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const clap = @import("clap");
const std = @import("std");
const zup = @import("root");
const ArgIterator = std.process.ArgIterator;
const Config = zup.Config;
const parsers = .{
.COMMAND = clap.parsers.string,
.NAME = clap.parsers.string,
};
pub fn SubCommand(comptime template: type) type {
return struct {
pub const base = template;
const params = clap.parseParamsComptime(
\\-H, --help Display this help and exit
\\-V, --version Display the version of Zup and exit
\\
++ template.params);
pub fn help(name: []const u8) !void {
var buf: [1024]u8 = undefined;
var stderr = std.fs.File.stderr().writer(&buf);
const writer = &stderr.interface;
try writer.print("USAGE: zup {s} ", .{name});
try clap.usage(writer, clap.Help, ¶ms);
try writer.writeAll("\n\n");
try clap.help(writer, clap.Help, ¶ms, .{
.description_on_new_line = false,
.description_indent = 0,
.indent = 2,
.max_width = 120,
.spacing_between_parameters = 0,
});
try writer.writeAll("\n" ++ template.description ++ "\n");
return writer.flush();
}
pub fn main(name: []const u8, config: Config, args: *ArgIterator) !void {
const allocator = config.allocator;
var diag = clap.Diagnostic{};
var res = clap.parseEx(clap.Help, ¶ms, parsers, args, .{
.allocator = allocator,
.diagnostic = &diag,
}) catch |err| {
var buf: [1024]u8 = undefined;
var stderr = std.fs.File.stderr().writer(&buf);
diag.report(&stderr.interface, err) catch {};
stderr.interface.flush() catch {};
try help(name);
return err;
};
defer res.deinit();
if (res.args.help != 0) {
return help(name);
}
if (res.args.version != 0) {
return zup.printVersion();
}
if (res.positionals.len < template.min_args or res.positionals.len > template.max_args) {
try help(name);
return error.ArgError;
}
return template.main(@TypeOf(res), config, res);
}
};
}
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