node: Print version information on startup

Resolves #591. Thanks to my friend @kinnison who wrote git-testament!

Author: Jannis

Cargo.lock

@@ -7,6 +7,7 @@ edition = "2018"
 clap = "2.31.2"
 env_logger = "0.5.10"
 futures = "0.1.21"
+git-testament = "0.1"
 graphql-parser = "0.2.1"
 http = "0.1"
 # We're using the latest ipfs-api for the HTTPS support that was merged in

node/Cargo.toml

@@ -19,6 +19,7 @@ extern crate url;
 
 use clap::{App, Arg};
 use futures::sync::oneshot;
+use git_testament::{git_testament, render_testament};
 use ipfs_api::IpfsClient;
 use lazy_static::lazy_static;
 use std::env;
@@ -59,6 +60,8 @@ lazy_static! {
         .unwrap_or(50);
 }
 
+git_testament!(TESTAMENT);
+
 fn main() {
     let (shutdown_sender, shutdown_receiver) = oneshot::channel();
     // Register guarded panic logger which ensures logs flush on shutdown
@@ -236,6 +239,13 @@ fn async_main() -> impl Future<Item = (), Error = ()> + Send + 'static {
     // Set up logger
     let logger = logger(matches.is_present("debug"));
 
+    // Log version information
+    info!(
+        logger,
+        "Graph Node version: {}",
+        render_testament!(TESTAMENT)
+    );
+
     // Safe to unwrap because a value is required by CLI
     let postgres_url = matches.value_of("postgres-url").unwrap().to_string();