Download compressed gz image from remote source

[Razaloc]

Accept url arguments for remote image download and copy.
Implements async support for use of reqwest. Bmap file is searched as in
local option in the current file with same name and the extension ".bmap"
Closes: #9
Closes: #46
Closes: #8

Signed-off-by: Rafael Garcia Ruiz rafael.garcia@collabora.com

[Razaloc]

Takes some of the intended changes of #34 applying review comments.

[Razaloc]

main.rs new code is now extracted into copy_async. Instead of branching every sync/async action, now we have two branches of execution starting at the main function, depending on the input:

async fn main() -> Result<()> {
    let opts = Opts::parse();

    match opts.command {
        Command::Copy(c) => match Url::parse(c.image.to_str().unwrap()) {
            Ok(_) => copy_async(c).await,
            Err(_) => copy(c),
        },
    }
}

The idea is to make the code clearer and more readable, and also leave the copy intact since we haven't actually touch it.

[Razaloc]

main.rs new code is now extracted into copy_remote_input. Instead of branching every sync/async action, now we have two branches of execution starting at the copy function, depending on the input:

async fn copy(c: Copy) -> Result<()> {
    match Url::parse(c.image.to_str().unwrap()) {
        Ok(_) => copy_remote_input(c).await,
        Err(_) => copy_local_input(c),
    }
}

The idea is to make the code clearer and more readable, and also leave the copy_local_input inside intact since we haven't actually touch it.

[obbardc]

@Razaloc Can you resolve the merge conflicts ?

[obbardc]

bors r+

[bors]

Build succeeded:

• bors