Update build.rs to eliminate vergen and gitoxide dependencies in the …

…node.

node/build.rs

@@ -1,16 +1,46 @@
-use std::env;
+use std::{env, process::Command};
 
-use vergen::EmitBuilder;
+const NODE_BUILD_PROFILE_ENV_VAR: &str = "NODE_BUILD_PROFILE";
 
+const DEFAULT_BUILD_PROFILE: &str = "PROFILE";
+
+///
+/// `casper-node` build script to capture the git revision hash and export it to cargo to include
+/// it in the version information
+///
+/// Notes: This script exports information to cargo via println! with the old invocation prefix of
+/// `cargo:`, if/when the node uses a Rust version `1.77` or above, this should be changed to
+/// `cargo::` as the prefix changed in that version of rust
 fn main() {
-    if let Err(error) = EmitBuilder::builder().fail_on_error().git_sha(true).emit() {
-        println!("cargo:warning={}", error);
-        println!("cargo:warning=casper-node build version will not include git short hash");
-    }
+    match Command::new("git")
+        .arg("rev-parse")
+        .arg("--short")
+        .arg("HEAD")
+        .output()
+    {
+        Ok(output) => {
+            //In the event the git command is successful, export the properly formatted git hash to
+            // cargo at compile time.
+            let git_hash_raw =
+                String::from_utf8(output.stdout).expect("Failed to obtain commit hash to string");
+            let git_hash = git_hash_raw.trim_end_matches('\n');
 
-    // Make the build profile available to rustc at compile time.
-    println!(
-        "cargo:rustc-env=NODE_BUILD_PROFILE={}",
-        env::var("PROFILE").unwrap()
-    );
+            println!(
+                "cargo:rustc-env={}={}",
+                NODE_BUILD_PROFILE_ENV_VAR, git_hash
+            );
+        }
+
+        Err(error) => {
+            println!("cargo:warning={}", error);
+            println!("cargo:warning=casper-node build version will not include git short hash");
+            // In the event of an error, export the error, and export a default build profile to
+            // cargo at compile time.
+            println!(
+                "cargo:rustc-env={}={}",
+                NODE_BUILD_PROFILE_ENV_VAR,
+                env::var(DEFAULT_BUILD_PROFILE).unwrap()
+            );
+        }
+    }
 }