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|
use patchkit::edit;
fn main() {
let patch_text = r#"--- a/src/main.rs 2023-01-01 00:00:00
+++ b/src/main.rs 2023-01-02 00:00:00
@@ -1,5 +1,6 @@
fn main() {
- println!("Hello, world!");
+ println!("Hello, Rust!");
+ println!("This is a patched version.");
}
fn helper() {
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,7 +10,7 @@
pub struct Config {
pub name: String,
- pub version: u32,
+ pub version: String,
}
"#;
let parsed = edit::parse(patch_text);
if parsed.ok() {
let patch = parsed.tree();
println!(
"Successfully parsed patch with {} file(s)!",
patch.patch_files().count()
);
println!();
for patch_file in patch.patch_files() {
println!("=== File Change ===");
if let Some(old_file) = patch_file.old_file() {
if let Some(path) = old_file.path() {
println!("Old: {}", path.text());
}
}
if let Some(new_file) = patch_file.new_file() {
if let Some(path) = new_file.path() {
println!("New: {}", path.text());
}
}
for hunk in patch_file.hunks() {
println!("\n--- Hunk ---");
if let Some(header) = hunk.header() {
if let Some(old_range) = header.old_range() {
print!("@@ -{}", old_range.start().unwrap_or(0));
if let Some(count) = old_range.count() {
print!(",{}", count);
}
}
if let Some(new_range) = header.new_range() {
print!(" +{}", new_range.start().unwrap_or(0));
if let Some(count) = new_range.count() {
print!(",{}", count);
}
}
println!(" @@");
}
for line in hunk.lines() {
if let Some(text) = line.text() {
if line.as_add().is_some() {
println!("+{}", text);
} else if line.as_delete().is_some() {
println!("-{}", text);
} else if line.as_context().is_some() {
println!(" {}", text);
}
}
}
}
println!();
}
// Demonstrate lossless parsing
println!("=== Lossless Roundtrip ===");
println!("Original patch preserved exactly:");
let roundtrip = parsed.syntax_node().text().to_string();
assert_eq!(patch_text, roundtrip);
println!("✓ Roundtrip successful!");
} else {
println!("Parse errors:");
for error in parsed.errors() {
println!(" {}", error);
}
}
}
|
