feat(next/dev): allow to display version (vercel#2793)

crates/next-dev/Cargo.toml

@@ -75,3 +75,4 @@ nix = "0.25.0"
 
 [build-dependencies]
 turbo-tasks-build = { path = "../turbo-tasks-build" }
+vergen = { version = "7.3.2", default-features = false, features = ["cargo","git"] }

crates/next-dev/build.rs

@@ -1,5 +1,10 @@
 use turbo_tasks_build::generate_register;
+use vergen::{vergen, Config};
 
 fn main() {
     generate_register();
+
+    // Attempt to collect some build time env values but will skip if there are any
+    // errors.
+    let _ = vergen(Config::default());
 }

crates/next-dev/src/devserver_options.rs

@@ -48,6 +48,11 @@ pub struct DevServerOptions {
     #[cfg_attr(feature = "serializable", serde(default))]
     pub eager_compile: bool,
 
+    /// Display version of the binary. Noop if used in library mode.
+    #[cfg_attr(feature = "cli", clap(long))]
+    #[cfg_attr(feature = "serializable", serde(default))]
+    pub display_version: bool,
+
     /// Don't open the browser automatically when the dev server has started.
     #[cfg_attr(feature = "cli", clap(long))]
     #[cfg_attr(feature = "serializable", serde(default))]

crates/next-dev/src/main.rs

@@ -18,5 +18,42 @@ fn main() -> Result<()> {
 async fn main() -> Result<()> {
     let options = next_dev::devserver_options::DevServerOptions::parse();
 
+    if options.display_version {
+        println!(
+            "Build Timestamp\t\t{:#?}",
+            option_env!("VERGEN_BUILD_TIMESTAMP").unwrap_or_else(|| "N/A")
+        );
+        println!(
+            "Build Version\t\t{:#?}",
+            option_env!("VERGEN_BUILD_SEMVER").unwrap_or_else(|| "N/A")
+        );
+        println!(
+            "Commit SHA\t\t{:#?}",
+            option_env!("VERGEN_GIT_SHA").unwrap_or_else(|| "N/A")
+        );
+        println!(
+            "Commit Date\t\t{:#?}",
+            option_env!("VERGEN_GIT_COMMIT_TIMESTAMP").unwrap_or_else(|| "N/A")
+        );
+        println!(
+            "Commit Branch\t\t{:#?}",
+            option_env!("VERGEN_GIT_BRANCH").unwrap_or_else(|| "N/A")
+        );
+        println!(
+            "Commit Message\t\t{:#?}",
+            option_env!("VERGEN_GIT_COMMIT_MESSAGE").unwrap_or_else(|| "N/A")
+        );
+        println!(
+            "Cargo Target Triple\t{:#?}",
+            option_env!("VERGEN_CARGO_TARGET_TRIPLE").unwrap_or_else(|| "N/A")
+        );
+        println!(
+            "Cargo Profile\t\t{:#?}",
+            option_env!("VERGEN_CARGO_PROFILE").unwrap_or_else(|| "N/A")
+        );
+
+        return Ok(());
+    }
+
     next_dev::start_server(&options).await
 }