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Implemeting help message for servo browser app using groups::opts module.

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Signed-off-by: Adenilson Cavalcanti <a.cavalcanti@sisa.samsung.com>
This commit is contained in:
Adenilson Cavalcanti 2013-11-18 03:22:46 -08:00
parent 426d18ffb1
commit b2adac0cf3
1 changed files with 24 additions and 10 deletions
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34
src/components/gfx/opts.rs
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@ -7,7 +7,7 @@
use azure::azure_hl::{BackendType, CairoBackend, CoreGraphicsBackend}; use azure::azure_hl::{BackendType, CairoBackend, CoreGraphicsBackend};
use azure::azure_hl::{CoreGraphicsAcceleratedBackend, Direct2DBackend, SkiaBackend}; use azure::azure_hl::{CoreGraphicsAcceleratedBackend, Direct2DBackend, SkiaBackend};
use extra::getopts; use extra::getopts::groups;
/// Global flags for Servo, currently set on the command line. /// Global flags for Servo, currently set on the command line.
#[deriving(Clone)] #[deriving(Clone)]
@ -41,26 +41,40 @@ pub struct Opts {
headless: bool, headless: bool,
} }
fn print_usage(opts: &[groups::OptGroup]) {
let message = format!("Usage: ./servo [ options ... ] [URL]\n\twhere options include");
println(groups::usage(message, opts));
}
pub fn from_cmdline_args(args: &[~str]) -> Opts { pub fn from_cmdline_args(args: &[~str]) -> Opts {
let args = args.tail(); let args = args.tail();
let opts = ~[ let opts = ~[
getopts::optflag("c"), // CPU rendering groups::optflag("c", "cpu", "CPU rendering"),
getopts::optopt("o"), // output file groups::optopt("o", "output", "Output file", "output.png"),
getopts::optopt("r"), // rendering backend groups::optopt("r", "rendering", "Rendering backend", "direct2d|core-graphics|core-graphics-accelerated|cairo|skia."),
getopts::optopt("s"), // size of tiles groups::optopt("s", "size", "Size of tiles", "512"),
getopts::optopt("t"), // threads to render with groups::optopt("t", "threads", "Number of render threads", "1"),
getopts::optflagopt("p"), // profiler flag and output interval groups::optflagopt("p", "profile", "Profiler flag and output interval", "10"),
getopts::optflag("x"), // exit after load flag groups::optflag("x", "exit", "Exit after load flag"),
getopts::optflag("z"), // headless mode groups::optflag("z", "headless", "Headless mode"),
groups::optflag("h", "help", "Print this message")
]; ];
let opt_match = match getopts::getopts(args, opts) { let opt_match = match groups::getopts(args, opts) {
Ok(m) => m, Ok(m) => m,
Err(f) => fail!(f.to_err_msg()), Err(f) => fail!(f.to_err_msg()),
}; };
if opt_match.opt_present("h") || opt_match.opt_present("help") {
print_usage(opts);
// TODO: how to return a null struct and let the caller know that
// it should abort?
fail!("")
};
let urls = if opt_match.free.is_empty() { let urls = if opt_match.free.is_empty() {
print_usage(opts);
fail!(~"servo asks that you provide 1 or more URLs") fail!(~"servo asks that you provide 1 or more URLs")
} else { } else {
opt_match.free.clone() opt_match.free.clone()