Vendor things

third-party/vendor/sourcemap/examples/rewrite.rs

@@ -0,0 +1,49 @@
+use std::env;
+use std::fs;
+use std::io::Read;
+use std::path::Path;
+
+use sourcemap::{decode, DecodedMap, RewriteOptions, SourceMap};
+
+fn test(sm: &SourceMap) {
+    for (src_id, source) in sm.sources().enumerate() {
+        let path = Path::new(source);
+        if path.is_file() {
+            let mut f = fs::File::open(path).unwrap();
+            let mut contents = String::new();
+            if f.read_to_string(&mut contents).ok().is_none() {
+                continue;
+            }
+            if Some(contents.as_str()) != sm.get_source_contents(src_id as u32) {
+                println!("  !!! {source}");
+            }
+        }
+    }
+}
+
+fn load_from_reader<R: Read>(mut rdr: R) -> SourceMap {
+    match decode(&mut rdr).unwrap() {
+        DecodedMap::Regular(sm) => sm,
+        DecodedMap::Index(idx) => idx
+            .flatten_and_rewrite(&RewriteOptions {
+                load_local_source_contents: true,
+                ..Default::default()
+            })
+            .unwrap(),
+        _ => panic!("unexpected sourcemap format"),
+    }
+}
+
+fn main() {
+    let args: Vec<_> = env::args().collect();
+    let mut f = fs::File::open(&args[1]).unwrap();
+    let sm = load_from_reader(&mut f);
+    println!("before dump");
+    test(&sm);
+
+    println!("after dump");
+    let mut json: Vec<u8> = vec![];
+    sm.to_writer(&mut json).unwrap();
+    let sm = load_from_reader(json.as_slice());
+    test(&sm);
+}