Disable Binary Warning for Single Lines?

[LangLangBart]

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]

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...

[LangLangBart]

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]

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

[LangLangBart]

Thanks for the input. I will close the discussion.

#2974