tests/builders/publish: Extract generate_empty_tarball() function

Author: Turbo87

src/tests/builders/publish.rs

@@ -9,15 +9,16 @@ lazy_static! {
     // The bytes of an empty tarball is not an empty vector of bytes because of tarball headers.
     // Unless files are added to a PublishBuilder, the `.crate` tarball that gets uploaded
     // will be empty, so precompute the empty tarball bytes to use as a default.
-    static ref EMPTY_TARBALL_BYTES: Vec<u8> = {
-        let mut empty_tarball = vec![];
-        {
-            let mut ar =
-                tar::Builder::new(GzEncoder::new(&mut empty_tarball, Compression::default()));
-            assert_ok!(ar.finish());
-        }
-        empty_tarball
-    };
+    static ref EMPTY_TARBALL_BYTES: Vec<u8> = generate_empty_tarball();
+}
+
+fn generate_empty_tarball() -> Vec<u8> {
+    let mut empty_tarball = vec![];
+    {
+        let mut ar = tar::Builder::new(GzEncoder::new(&mut empty_tarball, Compression::default()));
+        assert_ok!(ar.finish());
+    }
+    empty_tarball
 }
 
 /// A builder for constructing a crate for the purposes of testing publishing. If you only need