Auto merge of #6257 - khionu:master, r=alexcrichton

Configure tar to not set mtime

This PR is fixes #6238. Currently uses a `patch` on `tar`, and should not be merged until `tar` makes a release containing the function `set_preserve_mtime`.

Cargo.toml

@@ -50,7 +50,7 @@ serde_derive = "1.0"
 serde_ignored = "0.0.4"
 serde_json = { version = "1.0.30", features = ["raw_value"] }
 shell-escape = "0.1.4"
-tar = { version = "0.4.15", default-features = false }
+tar = { version = "0.4.18", default-features = false }
 tempfile = "3.0"
 termcolor = "1.0"
 toml = "0.4.2"

src/cargo/ops/cargo_package.rs

@@ -418,6 +418,9 @@ fn run_verify(ws: &Workspace, tar: &FileLock, opts: &PackageOpts) -> CargoResult
         paths::remove_dir_all(&dst)?;
     }
     let mut archive = Archive::new(f);
+    // We don't need to set the Modified Time, as it's not relevant to verification
+    // and it errors on filesystems that don't support setting a modified timestamp
+    archive.set_preserve_mtime(false);
     archive.unpack(dst.parent().unwrap())?;
 
     // Manufacture an ephemeral workspace to ensure that even if the top-level