Allow reading torrent metainfo from stdin

Torrent metainfo can be read from standard input by passing `-`:

    cat a.torrent | imdl torrent verify --input -
    cat a.torrent | imdl torrent link --input -
    cat a.torrent | imdl torrent show --input -

type: added

src/common.rs

@@ -61,12 +61,12 @@ pub(crate) use crate::{
   arguments::Arguments, bytes::Bytes, env::Env, error::Error, file_error::FileError,
   file_info::FileInfo, file_path::FilePath, file_status::FileStatus, files::Files, hasher::Hasher,
   host_port::HostPort, host_port_parse_error::HostPortParseError, info::Info, infohash::Infohash,
-  lint::Lint, linter::Linter, magnet_link::MagnetLink, md5_digest::Md5Digest, metainfo::Metainfo,
-  metainfo_error::MetainfoError, mode::Mode, options::Options, output_stream::OutputStream,
-  output_target::OutputTarget, piece_length_picker::PieceLengthPicker, piece_list::PieceList,
-  platform::Platform, sha1_digest::Sha1Digest, status::Status, style::Style,
-  subcommand::Subcommand, table::Table, torrent_summary::TorrentSummary, use_color::UseColor,
-  verifier::Verifier, walker::Walker,
+  input::Input, input_target::InputTarget, lint::Lint, linter::Linter, magnet_link::MagnetLink,
+  md5_digest::Md5Digest, metainfo::Metainfo, metainfo_error::MetainfoError, mode::Mode,
+  options::Options, output_stream::OutputStream, output_target::OutputTarget,
+  piece_length_picker::PieceLengthPicker, piece_list::PieceList, platform::Platform,
+  sha1_digest::Sha1Digest, status::Status, style::Style, subcommand::Subcommand, table::Table,
+  torrent_summary::TorrentSummary, use_color::UseColor, verifier::Verifier, walker::Walker,
 };
 
 // type aliases

src/env.rs

@@ -3,6 +3,7 @@ use crate::common::*;
 pub(crate) struct Env {
   args: Vec<OsString>,
   dir: PathBuf,
+  input: Box<dyn Read>,
   err: OutputStream,
   out: OutputStream,
 }
@@ -20,7 +21,13 @@ impl Env {
     let out_stream = OutputStream::stdout(style);
     let err_stream = OutputStream::stderr(style);
 
-    Self::new(dir, env::args(), out_stream, err_stream)
+    Self::new(
+      dir,
+      env::args(),
+      Box::new(io::stdin()),
+      out_stream,
+      err_stream,
+    )
   }
 
   pub(crate) fn run(&mut self) -> Result<(), Error> {
@@ -69,13 +76,20 @@ impl Env {
     });
   }
 
-  pub(crate) fn new<S, I>(dir: PathBuf, args: I, out: OutputStream, err: OutputStream) -> Self
+  pub(crate) fn new<S, I>(
+    dir: PathBuf,
+    args: I,
+    input: Box<dyn Read>,
+    out: OutputStream,
+    err: OutputStream,
+  ) -> Self
   where
     S: Into<OsString>,
     I: IntoIterator<Item = S>,
   {
     Self {
       args: args.into_iter().map(Into::into).collect(),
+      input,
       dir,
       out,
       err,
@@ -129,10 +143,6 @@ impl Env {
     &self.dir
   }
 
-  pub(crate) fn resolve(&self, path: impl AsRef<Path>) -> PathBuf {
-    self.dir().join(path).clean()
-  }
-
   pub(crate) fn err(&self) -> &OutputStream {
     &self.err
   }
@@ -148,6 +158,26 @@ impl Env {
   pub(crate) fn out_mut(&mut self) -> &mut OutputStream {
     &mut self.out
   }
+
+  pub(crate) fn resolve(&self, path: impl AsRef<Path>) -> PathBuf {
+    self.dir().join(path).clean()
+  }
+
+  pub(crate) fn read(&mut self, source: InputTarget) -> Result<Input> {
+    let data = match &source {
+      InputTarget::File(path) => {
+        let absolute = self.resolve(path);
+        fs::read(absolute).context(error::Filesystem { path })?
+      }
+      InputTarget::Stdin => {
+        let mut buffer = Vec::new();
+        self.input.read_to_end(&mut buffer).context(error::Stdin)?;
+        buffer
+      }
+    };
+
+    Ok(Input::new(source, data))
+  }
 }
 
 #[cfg(test)]

src/error.rs

@@ -7,21 +7,21 @@ use structopt::clap;
 pub(crate) enum Error {
   #[snafu(display("Failed to parse announce URL: {}", source))]
   AnnounceUrlParse { source: url::ParseError },
-  #[snafu(display("Failed to deserialize torrent metainfo from `{}`: {}", path.display(), source))]
+  #[snafu(display("Failed to deserialize torrent metainfo from {}: {}", input, source))]
   MetainfoDeserialize {
     source: bendy::serde::Error,
-    path: PathBuf,
+    input: InputTarget,
   },
   #[snafu(display("Failed to serialize torrent metainfo: {}", source))]
   MetainfoSerialize { source: bendy::serde::Error },
-  #[snafu(display("Failed to decode torrent metainfo from `{}`: {}", path.display(), error))]
+  #[snafu(display("Failed to decode torrent metainfo from {}: {}", input, error))]
   MetainfoDecode {
-    path: PathBuf,
+    input: InputTarget,
     error: bendy::decoding::Error,
   },
-  #[snafu(display("Metainfo from `{}` failed to validate: {}", path.display(), source))]
+  #[snafu(display("Metainfo from {} failed to validate: {}", input, source))]
   MetainfoValidate {
-    path: PathBuf,
+    input: InputTarget,
     source: MetainfoError,
   },
   #[snafu(display("Failed to parse byte count `{}`: {}", text, source))]
@@ -107,6 +107,8 @@ pub(crate) enum Error {
   PrivateTrackerless,
   #[snafu(display("Failed to write to standard error: {}", source))]
   Stderr { source: io::Error },
+  #[snafu(display("Failed to read from standard input: {}", source))]
+  Stdin { source: io::Error },
   #[snafu(display("Failed to write to standard output: {}", source))]
   Stdout { source: io::Error },
   #[snafu(display(

src/infohash.rs

@@ -6,11 +6,9 @@ pub(crate) struct Infohash {
 }
 
 impl Infohash {
-  pub(crate) fn load(path: &Path) -> Result<Infohash, Error> {
-    let bytes = fs::read(path).context(error::Filesystem { path })?;
-
-    let value = Value::from_bencode(&bytes).map_err(|error| Error::MetainfoDecode {
-      path: path.to_owned(),
+  pub(crate) fn from_input(input: &Input) -> Result<Infohash, Error> {
+    let value = Value::from_bencode(input.data()).map_err(|error| Error::MetainfoDecode {
+      input: input.source().clone(),
       error,
     })?;
 
@@ -20,7 +18,7 @@ impl Infohash {
           .iter()
           .find(|pair: &(&Cow<[u8]>, &Value)| pair.0.as_ref() == b"info")
           .ok_or_else(|| Error::MetainfoValidate {
-            path: path.to_owned(),
+            input: input.source().clone(),
             source: MetainfoError::InfoMissing,
           })?
           .1;
@@ -33,13 +31,13 @@ impl Infohash {
           Ok(Self::from_bencoded_info_dict(&encoded))
         } else {
           Err(Error::MetainfoValidate {
-            path: path.to_owned(),
+            input: input.source().clone(),
             source: MetainfoError::InfoType,
           })
         }
       }
       _ => Err(Error::MetainfoValidate {
-        path: path.to_owned(),
+        input: input.source().clone(),
         source: MetainfoError::Type,
       }),
     }
@@ -50,6 +48,12 @@ impl Infohash {
       inner: Sha1Digest::from_data(info),
     }
   }
+
+  #[cfg(test)]
+  pub(crate) fn load(path: &Path) -> Result<Infohash, Error> {
+    let input = Input::from_path(path)?;
+    Self::from_input(&input)
+  }
 }
 
 impl Into<Sha1Digest> for Infohash {
@@ -74,12 +78,12 @@ mod tests {
       foo: "x",
     };
 
-    let input = tempdir.path().join("foo");
+    let path = tempdir.path().join("foo");
 
     assert_matches!(
-      Infohash::load(&input),
-      Err(Error::MetainfoDecode{path, .. })
-      if path == input
+      Infohash::load(&path),
+      Err(Error::MetainfoDecode{input, .. })
+      if input == path
     );
   }
 
@@ -89,12 +93,12 @@ mod tests {
       foo: "i0e",
     };
 
-    let input = tempdir.path().join("foo");
+    let path = tempdir.path().join("foo");
 
     assert_matches!(
-      Infohash::load(&input),
-      Err(Error::MetainfoValidate{path, source: MetainfoError::Type})
-      if path == input
+      Infohash::load(&path),
+      Err(Error::MetainfoValidate{input, source: MetainfoError::Type})
+      if input == path
     );
   }
 
@@ -104,12 +108,12 @@ mod tests {
       foo: "de",
     };
 
-    let input = tempdir.path().join("foo");
+    let path = tempdir.path().join("foo");
 
     assert_matches!(
-      Infohash::load(&input),
-      Err(Error::MetainfoValidate{path, source: MetainfoError::InfoMissing})
-      if path == input
+      Infohash::load(&path),
+      Err(Error::MetainfoValidate{input, source: MetainfoError::InfoMissing})
+      if input == path
     );
   }
 
@@ -119,12 +123,12 @@ mod tests {
       foo: "d4:infoi0ee",
     };
 
-    let input = tempdir.path().join("foo");
+    let path = tempdir.path().join("foo");
 
     assert_matches!(
-      Infohash::load(&input),
-      Err(Error::MetainfoValidate{path, source: MetainfoError::InfoType})
-      if path == input
+      Infohash::load(&path),
+      Err(Error::MetainfoValidate{input, source: MetainfoError::InfoType})
+      if input == path
     );
   }
 }

src/input.rs

@@ -0,0 +1,29 @@
+use crate::common::*;
+
+pub(crate) struct Input {
+  source: InputTarget,
+  data: Vec<u8>,
+}
+
+impl Input {
+  pub(crate) fn new(source: InputTarget, data: Vec<u8>) -> Input {
+    Self { source, data }
+  }
+
+  pub(crate) fn data(&self) -> &[u8] {
+    &self.data
+  }
+
+  pub(crate) fn source(&self) -> &InputTarget {
+    &self.source
+  }
+
+  #[cfg(test)]
+  pub(crate) fn from_path(path: &Path) -> Result<Input> {
+    let data = fs::read(path).context(error::Filesystem { path })?;
+    Ok(Input {
+      source: InputTarget::File(path.to_owned()),
+      data,
+    })
+  }
+}

src/input_target.rs

@@ -0,0 +1,69 @@
+use crate::common::*;
+
+#[derive(PartialEq, Debug, Clone)]
+pub(crate) enum InputTarget {
+  File(PathBuf),
+  Stdin,
+}
+
+impl From<&OsStr> for InputTarget {
+  fn from(text: &OsStr) -> Self {
+    if text == OsStr::new("-") {
+      Self::Stdin
+    } else {
+      Self::File(text.into())
+    }
+  }
+}
+
+impl Display for InputTarget {
+  fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+    match self {
+      Self::Stdin => write!(f, "standard input"),
+      Self::File(path) => write!(f, "`{}`", path.display()),
+    }
+  }
+}
+
+#[cfg(test)]
+impl<P: AsRef<Path>> PartialEq<P> for InputTarget {
+  fn eq(&self, other: &P) -> bool {
+    match self {
+      Self::File(path) => path == other.as_ref(),
+      Self::Stdin => Path::new("-") == other.as_ref(),
+    }
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn file() {
+    assert_eq!(
+      InputTarget::from(OsStr::new("foo")),
+      InputTarget::File("foo".into())
+    );
+  }
+
+  #[test]
+  fn stdio() {
+    assert_eq!(InputTarget::from(OsStr::new("-")), InputTarget::Stdin);
+  }
+
+  #[test]
+  fn display_file() {
+    let path = PathBuf::from("./path");
+    let have = InputTarget::File(path).to_string();
+    let want = "`./path`";
+    assert_eq!(have, want);
+  }
+
+  #[test]
+  fn display_stdio() {
+    let have = InputTarget::Stdin.to_string();
+    let want = "standard input";
+    assert_eq!(have, want);
+  }
+}

src/main.rs

@@ -64,6 +64,8 @@ mod host_port;
 mod host_port_parse_error;
 mod info;
 mod infohash;
+mod input;
+mod input_target;
 mod into_u64;
 mod into_usize;
 mod lint;

src/metainfo.rs

@@ -51,16 +51,14 @@ pub(crate) struct Metainfo {
 }
 
 impl Metainfo {
-  pub(crate) fn load(path: impl AsRef<Path>) -> Result<Metainfo, Error> {
-    let path = path.as_ref();
-    let bytes = fs::read(path).context(error::Filesystem { path })?;
-    Self::deserialize(path, &bytes)
+  pub(crate) fn from_input(input: &Input) -> Result<Metainfo> {
+    Self::deserialize(input.source(), input.data())
   }
 
-  pub(crate) fn deserialize(path: impl AsRef<Path>, bytes: &[u8]) -> Result<Metainfo, Error> {
-    let path = path.as_ref();
-    let metainfo =
-      bendy::serde::de::from_bytes(&bytes).context(error::MetainfoDeserialize { path })?;
+  pub(crate) fn deserialize(source: &InputTarget, data: &[u8]) -> Result<Metainfo, Error> {
+    let metainfo = bendy::serde::de::from_bytes(&data).context(error::MetainfoDeserialize {
+      input: source.clone(),
+    })?;
     Ok(metainfo)
   }
 
@@ -78,7 +76,7 @@ impl Metainfo {
 
   #[cfg(test)]
   pub(crate) fn from_bytes(bytes: &[u8]) -> Metainfo {
-    Self::deserialize("<TEST>", bytes).unwrap()
+    Self::deserialize(&InputTarget::File("<TEST>".into()), bytes).unwrap()
   }
 
   pub(crate) fn verify(&self, base: &Path, progress_bar: Option<ProgressBar>) -> Result<Status> {

src/subcommand/torrent/link.rs

@@ -11,10 +11,11 @@ pub(crate) struct Link {
     long = "input",
     short = "i",
     value_name = "METAINFO",
-    help = "Generate magnet link from metainfo at `PATH`.",
+    help = "Generate magnet link from metainfo at `PATH`. If `PATH` is `-`, read metainfo from \
+            standard input.",
     parse(from_os_str)
   )]
-  input: PathBuf,
+  input: InputTarget,
   #[structopt(
     long = "open",
     short = "O",
@@ -33,9 +34,10 @@ pub(crate) struct Link {
 
 impl Link {
   pub(crate) fn run(self, env: &mut Env) -> Result<(), Error> {
-    let input = env.resolve(&self.input);
-    let infohash = Infohash::load(&input)?;
-    let metainfo = Metainfo::load(&input)?;
+    let input = env.read(self.input.clone())?;
+
+    let infohash = Infohash::from_input(&input)?;
+    let metainfo = Metainfo::from_input(&input)?;
 
     let mut link = MagnetLink::with_infohash(infohash);
 
@@ -233,8 +235,8 @@ mod tests {
     };
 
     assert_matches!(
-      env.run(), Err(Error::MetainfoValidate { path, source: MetainfoError::Type })
-      if path == env.resolve("foo.torrent")
+      env.run(), Err(Error::MetainfoValidate { input, source: MetainfoError::Type })
+      if input == "foo.torrent"
     );
   }
 

src/subcommand/torrent/show.rs

@@ -11,16 +11,17 @@ pub(crate) struct Show {
     long = "input",
     short = "i",
     value_name = "PATH",
-    help = "Show information about torrent at `PATH`.",
+    help = "Show information about torrent at `PATH`. If `Path` is `-`, read torrent metainfo \
+            from standard input.",
     parse(from_os_str)
   )]
-  input: PathBuf,
+  input: InputTarget,
 }
 
 impl Show {
   pub(crate) fn run(self, env: &mut Env) -> Result<(), Error> {
-    let input = env.resolve(&self.input);
-    let summary = TorrentSummary::load(&input)?;
+    let input = env.read(self.input)?;
+    let summary = TorrentSummary::from_input(&input)?;
     summary.write(env)?;
     Ok(())
   }

src/subcommand/torrent/verify.rs

@@ -14,10 +14,11 @@ pub(crate) struct Verify {
     long = "input",
     short = "i",
     value_name = "METAINFO",
-    help = "Verify torrent contents against torrent metainfo in `FILE`.",
+    help = "Verify torrent contents against torrent metainfo in `METAINFO`. If `METAINFO` is `-`, \
+            read metainfo from standard input.",
     parse(from_os_str)
   )]
-  metainfo: PathBuf,
+  metainfo: InputTarget,
   #[structopt(
     long = "content",
     short = "c",
@@ -31,18 +32,22 @@ pub(crate) struct Verify {
 
 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)?;
-
     VerifyStep::Loading {
-      metainfo: &metainfo_path,
+      metainfo: &self.metainfo,
     }
     .print(env)?;
 
-    let base = if let Some(content) = &self.content {
-      env.resolve(content)
+    let input = env.read(self.metainfo.clone())?;
+
+    let metainfo = Metainfo::from_input(&input)?;
+
+    let content = if let Some(content) = &self.content {
+      content.clone()
     } else {
-      metainfo_path.parent().unwrap().join(&metainfo.info.name)
+      match &self.metainfo {
+        InputTarget::File(path) => path.parent().unwrap().join(&metainfo.info.name),
+        InputTarget::Stdin => PathBuf::from(&metainfo.info.name),
+      }
     };
 
     let progress_bar = if env.err().is_styled_term() {
@@ -59,9 +64,9 @@ impl Verify {
       None
     };
 
-    VerifyStep::Verifying { content: &base }.print(env)?;
+    VerifyStep::Verifying { content: &content }.print(env)?;
 
-    let status = metainfo.verify(&base, progress_bar)?;
+    let status = metainfo.verify(&env.resolve(content), progress_bar)?;
 
     status.print(env)?;
 
@@ -257,6 +262,58 @@ mod tests {
     Ok(())
   }
 
+  #[test]
+  fn verify_stdin() -> 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 content = create_env.resolve("foo");
+
+    let mut verify_env = test_env! {
+      args: [
+        "torrent",
+        "verify",
+        "--input",
+        "-",
+        "--content",
+        &content,
+      ],
+      input: fs::read(&torrent).unwrap(),
+      tree: {},
+    };
+
+    assert_matches!(verify_env.run(), Ok(()));
+
+    let want = format!(
+      "[1/2] \u{1F4BE} Loading metainfo from standard input…\n[2/2] \u{1F9EE} Verifying pieces \
+       from `{}`…\n\u{2728}\u{2728} Verification succeeded! \u{2728}\u{2728}\n",
+      content.display()
+    );
+
+    assert_eq!(verify_env.err(), want);
+    assert_eq!(verify_env.out(), "");
+
+    Ok(())
+  }
+
   #[test]
   fn output_multiple() -> Result<()> {
     let mut create_env = test_env! {
@@ -511,4 +568,55 @@ mod tests {
 
     Ok(())
   }
+
+  #[test]
+  fn stdin_uses_name() -> 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 metainfo = fs::read(torrent).unwrap();
+
+    let mut verify_env = test_env! {
+      args: [
+        "torrent",
+        "verify",
+        "--input",
+        "-",
+      ],
+      input: metainfo,
+      tree: {},
+    };
+
+    fs::rename(create_env.resolve("foo"), verify_env.resolve("foo")).unwrap();
+
+    assert_matches!(verify_env.run(), Ok(()));
+
+    let want = format!(
+      "[1/2] \u{1F4BE} Loading metainfo from standard input…\n[2/2] \u{1F9EE} Verifying pieces \
+       from `foo`…\n\u{2728}\u{2728} Verification succeeded! \u{2728}\u{2728}\n",
+    );
+
+    assert_eq!(verify_env.err(), want);
+
+    Ok(())
+  }
 }

src/subcommand/torrent/verify/verify_step.rs

@@ -2,7 +2,7 @@ use crate::common::*;
 
 #[derive(Clone, Copy)]
 pub(crate) enum VerifyStep<'a> {
-  Loading { metainfo: &'a Path },
+  Loading { metainfo: &'a InputTarget },
   Verifying { content: &'a Path },
 }
 
@@ -27,9 +27,7 @@ impl<'a> Step for VerifyStep<'a> {
 
   fn write_message(&self, write: &mut dyn Write) -> io::Result<()> {
     match self {
-      Self::Loading { metainfo } => {
-        write!(write, "Loading metainfo from `{}`…", metainfo.display())
-      }
+      Self::Loading { metainfo } => write!(write, "Loading metainfo from {}…", metainfo),
       Self::Verifying { content } => {
         write!(write, "Verifying pieces from `{}`…", content.display())
       }

src/test_env.rs

@@ -4,6 +4,7 @@ macro_rules! test_env {
   {
     args: [$($arg:expr),* $(,)?],
     $(cwd: $cwd:expr,)?
+    $(input: $input:expr,)?
     $(err_style: $err_style:expr,)?
     tree: {
       $($tree:tt)*
@@ -15,6 +16,7 @@ macro_rules! test_env {
       TestEnvBuilder::new()
         $(.current_dir(tempdir.path().join($cwd)))?
         $(.err_style($err_style))?
+        $(.input($input))?
         .tempdir(tempdir)
         .arg("imdl")
         $(.arg($arg))*
@@ -73,8 +75,9 @@ impl TestEnv {
     fs::set_permissions(self.env.resolve(path), permissions).unwrap();
   }
 
-  pub(crate) fn load_metainfo(&self, filename: impl AsRef<Path>) -> Metainfo {
-    Metainfo::load(self.env.resolve(filename.as_ref())).unwrap()
+  pub(crate) fn load_metainfo(&mut self, filename: impl AsRef<Path>) -> Metainfo {
+    let input = self.env.read(filename.as_ref().as_os_str().into()).unwrap();
+    Metainfo::from_input(&input).unwrap()
   }
 }
 

src/test_env_builder.rs

@@ -3,10 +3,11 @@ use crate::common::*;
 pub(crate) struct TestEnvBuilder {
   args: Vec<OsString>,
   current_dir: Option<PathBuf>,
+  err_style: bool,
+  input: Option<Box<dyn Read>>,
   out_is_term: bool,
   tempdir: Option<TempDir>,
   use_color: bool,
-  err_style: bool,
 }
 
 impl TestEnvBuilder {
@@ -14,10 +15,11 @@ impl TestEnvBuilder {
     TestEnvBuilder {
       args: Vec::new(),
       current_dir: None,
+      err_style: false,
+      input: None,
       out_is_term: false,
       tempdir: None,
       use_color: false,
-      err_style: false,
     }
   }
 
@@ -31,6 +33,11 @@ impl TestEnvBuilder {
     self
   }
 
+  pub(crate) fn input(mut self, input: impl AsRef<[u8]>) -> Self {
+    self.input = Some(Box::new(io::Cursor::new(input.as_ref().to_owned())));
+    self
+  }
+
   pub(crate) fn arg(mut self, arg: impl Into<OsString>) -> Self {
     self.args.push(arg.into());
     self
@@ -73,7 +80,13 @@ impl TestEnvBuilder {
 
     let err_stream = OutputStream::new(Box::new(err.clone()), self.err_style, false);
 
-    let env = Env::new(current_dir, self.args, out_stream, err_stream);
+    let env = Env::new(
+      current_dir,
+      self.args,
+      self.input.unwrap_or_else(|| Box::new(io::empty())),
+      out_stream,
+      err_stream,
+    );
 
     TestEnv::new(tempdir, env, err, out)
   }

src/torrent_summary.rs

@@ -22,10 +22,8 @@ impl TorrentSummary {
     Ok(Self::new(metainfo, infohash, size))
   }
 
-  pub(crate) fn load(path: &Path) -> Result<Self> {
-    let bytes = fs::read(path).context(error::Filesystem { path })?;
-
-    let metainfo = Metainfo::deserialize(path, &bytes)?;
+  pub(crate) fn from_input(input: &Input) -> Result<Self> {
+    let metainfo = Metainfo::from_input(input)?;
 
     Ok(Self::from_metainfo(metainfo)?)
   }