Switch to using grev::git_revision_auto() function in build.rs

With the release of version 0.1.3 of the grev crate, the git_revision()
function that we were relying on in our build script has been
deprecated.
With this change we replace its usage with the recommended
git_revision_auto() function instead.

Cargo.toml

@@ -35,7 +35,7 @@ required-features = ["clap_complete"]
 
 [build-dependencies]
 anyhow = {version = "1.0", default-features = false, features = ["std"]}
-grev = {version = "0.1"}
+grev = {version = "0.1.3"}
 
 [dependencies]
 apca = "0.25.0"

build.rs

@@ -1,16 +1,14 @@
-// Copyright (C) 2021-2022 Daniel Mueller <[email protected]>
+// Copyright (C) 2021-2023 Daniel Mueller <[email protected]>
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-use std::io::stdout;
-
 use anyhow::Result;
 
-use grev::get_revision as get_git_rev;
+use grev::git_revision_auto;
 
 
 fn main() -> Result<()> {
   let dir = env!("CARGO_MANIFEST_DIR");
-  if let Some(git_rev) = get_git_rev(dir, stdout().lock())? {
+  if let Some(git_rev) = git_revision_auto(dir)? {
     println!(
       "cargo:rustc-env=VERSION={} ({})",
       env!("CARGO_PKG_VERSION"),