57 lines
1.7 KiB
Rust
57 lines
1.7 KiB
Rust
use std::fmt;
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use std::fs::read_to_string;
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use std::process::exit;
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use console::{style, Style};
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use similar::text::{ChangeTag, TextDiff};
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struct Line(Option<usize>);
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impl fmt::Display for Line {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match self.0 {
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None => write!(f, " "),
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Some(idx) => write!(f, "{:<4}", idx + 1),
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}
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}
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}
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fn main() {
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let args: Vec<_> = std::env::args_os().collect();
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if args.len() != 3 {
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eprintln!("usage: terminal-inline [old] [new]");
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exit(1);
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}
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let old = read_to_string(&args[1]).unwrap();
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let new = read_to_string(&args[2]).unwrap();
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let diff = TextDiff::from_lines(&old, &new);
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for group in diff.grouped_ops(5) {
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for op in group {
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for change in diff.iter_inline_changes(&op) {
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let (sign, s) = match change.tag() {
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ChangeTag::Delete => ("-", Style::new().red()),
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ChangeTag::Insert => ("+", Style::new().green()),
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ChangeTag::Equal => (" ", Style::new()),
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};
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print!(
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"{}{} |{}",
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style(Line(change.old_index())).dim(),
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style(Line(change.new_index())).dim(),
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s.apply_to(sign).bold(),
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);
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for &(emphasized, value) in change.values() {
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if emphasized {
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print!("{}", s.apply_to(value).underlined().on_black());
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} else {
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print!("{}", s.apply_to(value));
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}
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}
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if change.is_missing_newline() {
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println!();
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}
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}
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}
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}
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}
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