Function termdiff::diff

pub fn diff(w: &mut dyn Write, old: &str, new: &str, theme: Theme) -> Result<()>

Print a diff to a writer

Examples

Black and white output

use termdiff::{arrows_theme, diff};
let old = "a\nb\nc";
let new = "a\nc\n";
let mut buffer: Vec<u8> = Vec::new();
diff(&mut buffer, old, new, arrows_theme()).unwrap();
let actual: String = String::from_utf8(buffer).expect("Not valid UTF-8");

assert_eq!(
    actual,
    "< left / > right
 a
<b
<c
>c
"
);

Colorful theme

use termdiff::{arrows_color_theme, diff};
let old = "a\nb\nc";
let new = "a\nc\n";
let mut buffer: Vec<u8> = Vec::new();
diff(&mut buffer, old, new, arrows_color_theme()).unwrap();
let actual: String = String::from_utf8(buffer).expect("Not valid UTF-8");

assert_eq!(
    actual,
    "\u{1b}[38;5;9m< left\u{1b}[39m / \u{1b}[38;5;10m> right\u{1b}[39m
 a
\u{1b}[38;5;9m<\u{1b}[39m\u{1b}[38;5;9mb
\u{1b}[39m\u{1b}[38;5;9m<\u{1b}[39m\u{1b}[38;5;9mc\u{1b}[39m
\u{1b}[38;5;10m>\u{1b}[39m\u{1b}[38;5;10mc
\u{1b}[39m"
);

Errors

Errors on failing to write to the writer.