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Raise error when using o>|
pipe (#13323)
# Description From the feedbacks from @amtoine , it's good to make nushell shows error for `o>|` syntax. # User-Facing Changes ## Before ```nushell 'foo' o>| print 07/09/2024 06:44:23 AM Error: nu::parser::parse_mismatch × Parse mismatch during operation. ╭─[entry #6:1:9] 1 │ 'foo' o>| print · ┬ · ╰── expected redirection target ``` ## After ```nushell 'foo' o>| print 07/09/2024 06:47:26 AM Error: nu::parser::parse_mismatch × Parse mismatch during operation. ╭─[entry #1:1:7] 1 │ 'foo' o>| print · ─┬─ · ╰── expected `|`. Redirection stdout to pipe is the same as piping directly. ╰──── ``` # Tests + Formatting Added one test --------- Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com>
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@ -580,7 +580,10 @@ fn lex_internal(
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// If the next character is non-newline whitespace, skip it.
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curr_offset += 1;
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} else {
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let token = try_lex_special_piped_item(input, &mut curr_offset, span_offset);
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let (token, err) = try_lex_special_piped_item(input, &mut curr_offset, span_offset);
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if error.is_none() {
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error = err;
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}
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if let Some(token) = token {
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output.push(token);
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is_complete = false;
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@ -614,40 +617,60 @@ fn try_lex_special_piped_item(
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input: &[u8],
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curr_offset: &mut usize,
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span_offset: usize,
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) -> Option<Token> {
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) -> (Option<Token>, Option<ParseError>) {
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let c = input[*curr_offset];
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let e_pipe_len = 3;
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let eo_pipe_len = 5;
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let o_pipe_len = 3;
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let offset = *curr_offset;
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if c == b'e' {
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// expect `e>|`
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if (offset + e_pipe_len <= input.len()) && (&input[offset..offset + e_pipe_len] == b"e>|") {
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*curr_offset += e_pipe_len;
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return Some(Token::new(
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TokenContents::ErrGreaterPipe,
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Span::new(span_offset + offset, span_offset + offset + e_pipe_len),
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));
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return (
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Some(Token::new(
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TokenContents::ErrGreaterPipe,
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Span::new(span_offset + offset, span_offset + offset + e_pipe_len),
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)),
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None,
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);
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}
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if (offset + eo_pipe_len <= input.len())
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&& (&input[offset..offset + eo_pipe_len] == b"e+o>|")
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{
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*curr_offset += eo_pipe_len;
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return Some(Token::new(
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TokenContents::OutErrGreaterPipe,
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Span::new(span_offset + offset, span_offset + offset + eo_pipe_len),
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));
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return (
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Some(Token::new(
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TokenContents::OutErrGreaterPipe,
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Span::new(span_offset + offset, span_offset + offset + eo_pipe_len),
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)),
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None,
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);
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}
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} else if c == b'o' {
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// indicates an error if user happened to type `o>|`
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if offset + o_pipe_len <= input.len() && (&input[offset..offset + o_pipe_len] == b"o>|") {
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return (
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None,
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Some(ParseError::Expected(
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"`|`. Redirecting stdout to a pipe is the same as normal piping.",
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Span::new(span_offset + offset, span_offset + offset + o_pipe_len),
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)),
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);
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}
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// it can be the following case: `o+e>|`
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if (offset + eo_pipe_len <= input.len())
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&& (&input[offset..offset + eo_pipe_len] == b"o+e>|")
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{
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*curr_offset += eo_pipe_len;
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return Some(Token::new(
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TokenContents::OutErrGreaterPipe,
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Span::new(span_offset + offset, span_offset + offset + eo_pipe_len),
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));
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return (
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Some(Token::new(
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TokenContents::OutErrGreaterPipe,
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Span::new(span_offset + offset, span_offset + offset + eo_pipe_len),
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)),
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None,
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);
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}
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}
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None
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(None, None)
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}
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@ -1161,3 +1161,11 @@ fn command_not_found_error_shows_not_found_2() {
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&& actual.err.contains("Did you mean `for`?")
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);
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}
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#[test]
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fn error_on_out_greater_pipe() {
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let actual = nu!(r#""foo" o>| print"#);
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assert!(actual
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.err
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.contains("Redirecting stdout to a pipe is the same as normal piping"))
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}
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