bc-envelope-cli 0.35.0

Gordian Envelope Command Line Tool.
Documentation 
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use anyhow::{Result, anyhow};
use bc_components::URI;
use bc_envelope::known_values;
use bc_xid::{XIDDocument, XIDVerifySignature};
use clap::Args;

use crate::{EnvelopeArgs, EnvelopeArgsLike};

/// Retrieve the XID Document's resolution method at the given index.
#[derive(Debug, Args)]
#[group(skip)]
pub struct CommandArgs {
    /// The index of the resolution method to retrieve.
    index: usize,

    #[command(flatten)]
    envelope_args: EnvelopeArgs,
}

impl EnvelopeArgsLike for CommandArgs {
    fn envelope(&self) -> Option<&str> { self.envelope_args.envelope() }
}

impl crate::Exec for CommandArgs {
    fn exec(&self) -> Result<String> {
        let envelope = self.read_envelope()?;
        XIDDocument::from_envelope(&envelope, None, XIDVerifySignature::None)?; // Validation only
        let resolution_assertions =
            envelope.assertions_with_predicate(known_values::DEREFERENCE_VIA);
        let assertion = resolution_assertions
            .get(self.index)
            .ok_or_else(|| anyhow!("Index out of bounds"))?;
        let uri: URI = assertion.try_object()?.try_leaf()?.try_into()?;
        Ok(uri.to_string())
    }
}