Fix missing commit hash from version info (#1352)

crates/prek/build.rs

@@ -30,7 +30,12 @@ fn main() {
     // The workspace root directory is not available without walking up the tree
     // https://github.com/rust-lang/cargo/issues/3946
     #[allow(clippy::disallowed_methods)]
-    let workspace_root = Path::new(&std::env::var("CARGO_MANIFEST_DIR").unwrap()).to_path_buf();
+    let workspace_root = Path::new(&std::env::var("CARGO_MANIFEST_DIR").unwrap())
+        .parent()
+        .expect("CARGO_MANIFEST_DIR should be nested in workspace")
+        .parent()
+        .expect("CARGO_MANIFEST_DIR should be doubly nested in workspace")
+        .to_path_buf();
 
     commit_info(&workspace_root);
 }

crates/prek/tests/run.rs

@@ -2785,3 +2785,25 @@ fn run_with_stdin_closed() {
     ----- stderr -----
     ");
 }
+
+/// Test `prek --version` outputs version info.
+#[test]
+fn version_info() {
+    let context = TestContext::new();
+    let filters = context
+        .filters()
+        .into_iter()
+        .chain([(
+            r"prek \d+\.\d+\.\d+(-[0-9A-Za-z]+(\.[0-9A-Za-z]+)*)?(\+\d+)? \(\w{9} [\d\-T:\.]+\)",
+            "prek [CURRENT_VERSION] ([COMMIT] [DATE])",
+        )])
+        .collect::<Vec<_>>();
+    cmd_snapshot!(filters, context.command().arg("--version"), @r"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+    prek [CURRENT_VERSION] ([COMMIT] [DATE])
+
+    ----- stderr -----
+    ");
+}