Disable Binary Warning for Single Lines? #2971

LangLangBart · 2024-05-29T00:17:18Z

LangLangBart
May 29, 2024

bat --version
bat 0.24.0

Is there a way to disable the binary warning message? For example, I have a line of text with a NUL byte, and piping it into bat reveals a warning. Interestingly, placing the NUL byte on a second line won't show the warning.

❌
printf "First\0" | bat -p
[bat warning]: Binary content from STDIN will not be printed to 
the terminal (but will be present if the output of 'bat' is piped). 
You can use 'bat -A' to show the binary file contents.

✅
printf "First\nSecond\0" | bat -p
  First
  Second^@

Using the --show-all/-A flag doesn't show the warning but is not useful for my use case.

I try to colorize my zsh history and pipe it into fzf.

If the last command was a single line, then bat fails; if the last command was multiline, then bat succeeds as intended.

# zsh only, the '-N'  flag separates the array elements by `NUL`
print -rN -- ${(uv)history[@]} | bat -pl sh | fzf --read0

EDIT1: Related #823

keith-hall · 2024-05-29T17:34:22Z

keith-hall
May 29, 2024
Collaborator

as you've already found out, bat will show that warning when the content is detected as binary and the header style is not being displayed and not using the show-all flag:

bat/src/printer.rs

Lines 435 to 444 in 8f8c953

    
                   if !self.config.style_components.header() { 
        
                       if Some(ContentType::BINARY) == self.content_type && !self.config.show_nonprintable { 
        
                           writeln!( 
        
                               handle, 
        
                               "{}: Binary content from {} will not be printed to the terminal \ 
        
                                (but will be present if the output of 'bat' is piped). You can use 'bat -A' \ 
        
                                to show the binary file contents.", 
        
                               Yellow.paint("[bat warning]"), 
        
                               input.description.summary(), 
        
                           )?;

there is no other way to remove this warning right now, and indeed you don't just want to disable the warning but to output the actual first line. Perhaps pre-processing the input would be a suitable solution - fake it all as being multiline by adding a newline to the end of each entry being passed into bat...

3 replies

LangLangBart May 29, 2024
Author

Thanks for pointing out the source code. The decision to label the input as BINARY seems to be made in src/input.rs:

bat/src/input.rs

Lines 260 to 271 in 8f8c953

    
           let mut first_line = vec![]; 
        
           reader.read_until(b'\n', &mut first_line).ok(); 
        
           let content_type = if first_line.is_empty() { 
        
               None 
        
           } else { 
        
               Some(content_inspector::inspect(&first_line[..])) 
        
           }; 
        
           if content_type == Some(ContentType::UTF_16LE) { 
        
               reader.read_until(0x00, &mut first_line).ok(); 
        
           }

fake it all

Making the first line empty and in a later step remove that line seems to work.

# zsh
(print; print -rNC1 -- "${(@uv)history}") | bat -pl zsh | sed '1d' | fzf --read0

It's a bit hacky. Do you think it's worth opening an issue requesting a new flag, e.g. --read0, for bat so that the content_type is set to None when the flag is present?

keith-hall May 29, 2024
Collaborator

sure, go ahead and make an issue for it, and we will hopefully get some input from others :)

LangLangBart May 29, 2024
Author

Thanks for the input. I will close the discussion.

#2974

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