main: exit() only at the end
std::process::exit() was used mainly to be able to return an error code, but it's pretty brutal (no destructors calls). This commit works around the lack of return value for main() and calls exit() only at the very end.
This commit is contained in:
parent
c3c2726537
commit
3a970c3e33
29
src/main.rs
29
src/main.rs
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@ -34,6 +34,11 @@ use nrgrip::raw_audio;
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fn main() {
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process::exit(main_main());
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}
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fn main_main() -> i32 {
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let args: Vec<String> = env::args().collect();
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let prog_name = &args.first().expect("Can't retrieve program's name");
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@ -55,13 +60,15 @@ fn main() {
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};
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if options.opt_present("help") {
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exit_usage(&prog_name, &opts);
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print_usage(&prog_name, &opts);
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return 0;
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}
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// Get input NRG image name
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if options.free.len() != 1 {
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// We need exactly one input file!
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fail_usage(&prog_name, &opts);
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print_usage(&prog_name, &opts);
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return 1;
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}
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let img_path = &options.free[0];
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println!("NRG image path: \"{}\"", img_path);
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@ -79,7 +86,7 @@ fn main() {
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Ok(fd) => fd,
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Err(err) => {
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println!("Can't open image file \"{}\": {}", img_path, err);
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process::exit(1);
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return 1;
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},
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};
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@ -88,7 +95,7 @@ fn main() {
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Ok(metadata) => metadata,
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Err(err) => {
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println!("Error reading \"{}\": {}", img_path, err);
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process::exit(1);
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return 1;
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},
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};
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@ -102,7 +109,7 @@ fn main() {
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println!("\nExtracting cue sheet...");
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if let Err(err) = cue_sheet::write_cue_sheet(&img_path, &metadata) {
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println!("Error writing cue sheet: {}", err);
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process::exit(1);
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return 1;
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}
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println!("OK!");
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}
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@ -116,19 +123,11 @@ fn main() {
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}
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println!("OK!");
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}
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0
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}
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fn exit_usage(prog_name: &str, opts: &Options) {
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print_usage(prog_name, opts);
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process::exit(0);
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}
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fn fail_usage(prog_name: &str, opts: &Options) {
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print_usage(prog_name, opts);
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process::exit(1);
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}
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fn print_usage(prog_name: &str, opts: &Options) {
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let brief = format!("NRGrip - rip Nero Burning ROM audio images
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