pub fn run<O: Write>(args: Args, out: &mut O) -> io::Result<bool> {
  // Deconstruct to split ownership:
  let Args { options, pattern, files } = args;


  let pattern = build_pattern(&pattern, &options).map_err(
    |e| {
      eprintln!("Error: invalid pattern '{}', {}", pattern, e);
      io::ErrorKind::InvalidInput
    }
  )?;


  // Reuse the same buffer for all the files, minimizing allocations.
  let mut buffer = Vec::<u8>::new();

  // The next part is a bit complicated:
  // Bgrep must return:
  //
  // 0 if there was any match, and no errors. `BrokenPipe` is not considered an error,
  //   but a signal to stop processing.
  //
  // 1 if there was no match, and no errors. `BrokenPipe` cannot happen in this case,
  //   because it should only happen when outputting, and no matches means no output.
  //
  // An error code corresponding to the last error. Common errors are `NotFound` and
  // `PermissionDenied`.

  // We need to store the last generated error if any, or whether there was a match:
  let mut result = Ok(false);

  // Converting to vec to use the owned iterator. Box<[T]> has no owned iterator.
  for file in files.to_vec() {
    let file: PathBuf = file; // Make sure we are using an owned iterator.

    match run_file(out, &options, &pattern, &file, &mut buffer) {
      Ok(false) => (),
      Ok(true) => result = result.map(|_| true), // Set to true if there was no error.
      Err(e) =>
        if e.kind() == io::ErrorKind::BrokenPipe {
          // Bail early on `BronkenPipe`, conserving the previous error if any.
          result = result.map(|_| true); // `BrokenPipe` only happens when outputting,
          break;                         // and that means there was a match.
        } else {
          result = Err(e) // Store the error and move on.
        }
    }
  }

  result
}
/// Run bgrep with the given args, outputting to stdout.
/// Error detail may be outputted to stderr.
/// Returns whether there was a match.
Run bgrep with the given args, outputting to stdout.
Error detail may be outputted to stderr.
Returns whether there was a match.
Run bgrep with the given args outputting to stdout . Error detail may be outputted to stderr . Returns whether there was a match .
pub fn run<O: Write>(args: Args, out: &mut O) -> io::Result<bool> {
  // Deconstruct to split ownership:
  let Args { options, pattern, files } = args;
  let pattern = build_pattern(&pattern, &options).map_err(
    |e| {
      eprintln!("Error: invalid pattern '{}', {}", pattern, e);
      io::ErrorKind::InvalidInput
    }
  )?;
  // Reuse the same buffer for all the files, minimizing allocations.
  let mut buffer = Vec::<u8>::new();
  // The next part is a bit complicated:
  // Bgrep must return:
  //
  // 0 if there was any match, and no errors. `BrokenPipe` is not considered an error,
  //   but a signal to stop processing.
  //
  // 1 if there was no match, and no errors. `BrokenPipe` cannot happen in this case,
  //   because it should only happen when outputting, and no matches means no output.
  //
  // An error code corresponding to the last error. Common errors are `NotFound` and
  // `PermissionDenied`.
  // We need to store the last generated error if any, or whether there was a match:
  let mut result = Ok(false);
  // Converting to vec to use the owned iterator. Box<[T]> has no owned iterator.
  for file in files.to_vec() {
    let file: PathBuf = file; // Make sure we are using an owned iterator.
    match run_file(out, &options, &pattern, &file, &mut buffer) {
      Ok(false) => (),
      Ok(true) => result = result.map(|_| true), // Set to true if there was no error.
      Err(e) =>
        if e.kind() == io::ErrorKind::BrokenPipe {
          // Bail early on `BronkenPipe`, conserving the previous error if any.
          result = result.map(|_| true); // `BrokenPipe` only happens when outputting,
          break;                         // and that means there was a match.
        } else {
          result = Err(e) // Store the error and move on.
        }
    }
  }
  result
}
pub fn run < O : Write > ( args : Args , out : & mut O ) -> io :: Result < bool > { // Deconstruct to split ownership: let Args { options , pattern , files } = args ; let pattern = build_pattern ( & pattern , & options ) . map_err ( | e | { eprintln ! ( " " pattern e ) ; io :: ErrorKind :: InvalidInput } ) ? ; // Reuse the same buffer for all the files, minimizing allocations. let mut buffer = Vec :: < u8 > :: new ( ) ; // The next part is a bit complicated: // Bgrep must return: // // 0 if there was any match, and no errors. `BrokenPipe` is not considered an error, //   but a signal to stop processing. // // 1 if there was no match, and no errors. `BrokenPipe` cannot happen in this case, //   because it should only happen when outputting, and no matches means no output. // // An error code corresponding to the last error. Common errors are `NotFound` and // `PermissionDenied`. // We need to store the last generated error if any, or whether there was a match: let mut result = Ok ( false ) ; // Converting to vec to use the owned iterator. Box<[T]> has no owned iterator. for file in files . to_vec ( ) { let file : PathBuf = file ; // Make sure we are using an owned iterator. match run_file ( out , & options , & pattern , & file , & mut buffer ) { Ok ( false ) => ( ) , Ok ( true ) => result = result . map ( | _ | true ) , // Set to true if there was no error. Err ( e ) => if e . kind ( ) == io :: ErrorKind :: BrokenPipe { // Bail early on `BronkenPipe`, conserving the previous error if any. result = result . map ( | _ | true ) ; // `BrokenPipe` only happens when outputting, break ; // and that means there was a match. } else { result = Err ( e ) // Store the error and move on. } } } result }
Run bgrep with the given args, outputting to stdout.
Run bgrep with the given args outputting to stdout .
args
Args
out
&mut O
args
Args
out
&mut O