cargo_inspect/
diff.rs

1use ansi_term::Colour::{Green, Red, White};
2use difference::{Changeset, Difference};
3
4pub use crate::errors::InspectError;
5
6/// Compare two strings and return a Github-style diff output
7pub fn diff(text1: String, text2: String) -> Result<String, InspectError> {
8    let Changeset { diffs, .. } = Changeset::new(&text1, &text2, "\n");
9
10    let mut t = String::new();
11
12    for i in 0..diffs.len() {
13        match diffs[i] {
14            Difference::Same(ref x) => {
15                t.push_str(&format!("\n{}", x));
16            }
17            Difference::Add(ref x) => {
18                match diffs[i - 1] {
19                    Difference::Rem(ref y) => {
20                        t.push_str(&Green.paint("\n+").to_string());
21                        let Changeset { diffs, .. } = Changeset::new(y, x, " ");
22                        for c in diffs {
23                            match c {
24                                Difference::Same(ref z) => {
25                                    t.push_str(&Green.paint(z).to_string());
26                                    t.push_str(&Green.paint(" ").to_string());
27                                }
28                                Difference::Add(ref z) => {
29                                    t.push_str(&White.on(Green).paint(z).to_string());
30                                    t.push_str(" ");
31                                }
32                                _ => (),
33                            }
34                        }
35                        t.push_str("");
36                    }
37                    _ => {
38                        t.push_str(&Green.paint(format!("\n+{}", x).to_string()));
39                    }
40                };
41            }
42            Difference::Rem(ref x) => {
43                t.push_str(&Red.paint(format!("\n-{}", x)).to_string());
44            }
45        }
46    }
47    Ok(t)
48}
cargo_inspect/diff.rs

cargo_inspect/
diff.rs
