Rust update - fix build and clippy erorrs (#1213)

commit-id:77034927

---

**Stack**:
- #1220
- #1219
- #1218
- #1217
- #1216
- #1215
- #1214
- #1221
- #1222
- #1213 ⬅


⚠️ *Part of a stack created by [spr](https://github.com/ejoffe/spr). Do
not merge manually using the UI - doing so may have unexpected results.*

scarb/src/core/registry/client/local.rs

@@ -213,6 +213,7 @@ fn edit_records(records_path: &Path, func: impl FnOnce(&mut IndexRecords)) -> Re
         .read(true)
         .write(true)
         .create(true)
+        .truncate(false)
         .open(records_path)
         .context("failed to open file")?;
 

scarb/src/flock.rs

@@ -148,8 +148,9 @@ pub struct AdvisoryLock<'f> {
     config: &'f Config,
 }
 
-#[derive(Debug)]
-pub struct AdvisoryLockGuard(Arc<FileLockGuard>);
+pub struct AdvisoryLockGuard {
+    _inner: Arc<FileLockGuard>,
+}
 
 impl<'f> AdvisoryLock<'f> {
     /// Acquires this advisory lock in an async manner.
@@ -172,7 +173,9 @@ impl<'f> AdvisoryLock<'f> {
                 arc
             }
         };
-        Ok(AdvisoryLockGuard(file_lock_arc))
+        Ok(AdvisoryLockGuard {
+            _inner: file_lock_arc,
+        })
     }
 }
 

scarb/src/ops/lockfile.rs

@@ -12,6 +12,7 @@ pub fn read_lockfile(ws: &Workspace<'_>) -> Result<Lockfile> {
         .read(true)
         .write(true)
         .create(true)
+        .truncate(false)
         .open(ws.lockfile_path())
         .context("failed to open lockfile")?;
 

utils/scarb-build-metadata/build.rs

@@ -52,7 +52,10 @@ fn cairo_version() {
         .root
         .expect("Expected metadata resolve root to be present.");
     assert!(
-        root.repr.starts_with("scarb "),
+        // The first condition for Rust >= 1.77
+        // (After the PackageId spec stabilization)
+        // The second condition for Rust < 1.77
+        root.repr.contains("scarb#") || root.repr.starts_with("scarb "),
         "Expected metadata resolve root to be `scarb`."
     );