intermodal/src/subcommand/torrent/verify.rs

use crate::common::*;

#[derive(StructOpt)]
#[structopt(
  help_message(consts::HELP_MESSAGE),
  version_message(consts::VERSION_MESSAGE),
  about("Verify files against a `.torrent` file.")
)]
pub(crate) struct Verify {
  #[structopt(
    long = "metainfo",
    value_name = "FILE",
    help = "Verify torrent contents against torrent metainfo in `FILE`.",
    parse(from_os_str)
  )]
  metainfo: PathBuf,
  #[structopt(
    long = "input",
    value_name = "PATH",
    help = "Verify torrent contents at `PATH` against torrent metainfo. Defaults to `name` field \
            of torrent info dictionary.",
    parse(from_os_str)
  )]
  input: Option<PathBuf>,
}

impl Verify {
  pub(crate) fn run(self, env: &mut Env) -> Result<(), Error> {
    let metainfo_path = env.resolve(&self.metainfo);
    let metainfo = Metainfo::load(&metainfo_path)?;

    let base = if let Some(input) = &self.input {
      env.resolve(input)
    } else {
      metainfo_path.parent().unwrap().join(&metainfo.info.name)
    };

    let status = metainfo.verify(&base)?;

    if status.good() {
      errln!(env, "Verification succeeded.");
      Ok(())
    } else {
      Err(Error::Verify { status })
    }
  }
}

#[cfg(test)]
mod tests {
  use super::*;

  #[test]
  fn require_metainfo_argument() {
    let mut env = test_env! {
      args: [],
      tree: {},
    };
    assert!(matches!(env.run(), Err(Error::Clap { .. })));
  }

  #[test]
  fn pass() -> Result<()> {
    let mut create_env = test_env! {
      args: [
        "torrent",
        "create",
        "--input",
        "foo",
        "--announce",
        "https://bar",
      ],
      tree: {
        foo: {
          a: "abc",
          d: "efg",
          h: "ijk",
        },
      },
    };

    create_env.run()?;

    let torrent = create_env.resolve("foo.torrent");

    let mut verify_env = test_env! {
      args: [
        "torrent",
        "verify",
        "--metainfo",
        torrent,
      ],
      tree: {},
    };

    assert_matches!(verify_env.run(), Ok(()));

    assert_eq!(verify_env.err(), "Verification succeeded.\n");

    Ok(())
  }

  #[test]
  fn fail() -> Result<()> {
    let mut create_env = test_env! {
      args: [
        "torrent",
        "create",
        "--input",
        "foo",
        "--announce",
        "https://bar",
      ],
      tree: {
        foo: {
          a: "abc",
          d: "efg",
          h: "ijk",
        },
      },
    };

    create_env.run()?;

    create_env.write("foo/a", "xyz");

    let torrent = create_env.resolve("foo.torrent");

    let mut verify_env = test_env! {
      args: [
        "torrent",
        "verify",
        "--metainfo",
        torrent,
      ],
      tree: {},
    };

    assert_matches!(verify_env.run(), Err(Error::Verify { .. }));

    assert_eq!(verify_env.err(), "");

    Ok(())
  }
}