lfs 0.5.3

give information on mounted disks
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mod fmt_mount;
mod json;

use argh::FromArgs;

#[derive(FromArgs)]
/// List your filesystems.
///
/// All units are SI.
///
/// Source at https://github.com/Canop/lfs
struct Args {

    /// print the version
    #[argh(switch, short='v')]
    version: bool,

    /// whether to show all mount points
    #[argh(switch, short='a')]
    all: bool,

    /// output as JSON
    #[argh(switch, short='j')]
    json: bool,
}

fn main() -> lfs_core::Result<()>  {
    let args:Args = argh::from_env();
    if args.version {
        println!("lfs {}", env!("CARGO_PKG_VERSION"));
        return Ok(());
    }
    let mut mounts = lfs_core::read_mounts()?;
    if !args.all {
        mounts.retain(|m|
            m.disk.is_some()
            && m.info.fs_type != "squashfs" // quite ad-hoc...
        );
    }
    if args.json {
        println!("{}", serde_json::to_string_pretty(&json::output_value(&mounts)).unwrap());
        return Ok(());
    }
    if mounts.is_empty() {
        println!("no disk was found - try\n    lfs -a");
        Ok(())
    } else {
        mounts.sort_by_key(|m| u64::MAX-m.size());
        fmt_mount::print(&mounts)
    }
}