Compute git hash at buildtime

Cargo.toml

@@ -2,6 +2,7 @@
 name = "interclip-server"
 version = "0.1.0"
 edition = "2021"
+build = "build.rs"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
@@ -15,7 +16,6 @@ tokio = { version = "1", features = ["full"] }
 async-lock = "2.4"
 log = "0.4"
 fern = "0.5"
-git2 = "0.16.1"
 dotenv = "0.15.0"
 diesel = { version = "2.1.4", features = ["postgres", "chrono"] }
 regex = "1.10"

build.rs

@@ -0,0 +1,25 @@
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::Path;
+use std::process::Command;
+
+fn main() {
+    // Get the directory where the output will be placed.
+    let out_dir = env::var("OUT_DIR").unwrap();
+    let dest_path = Path::new(&out_dir).join("git_commit.rs");
+    let mut f = File::create(&dest_path).unwrap();
+
+    // Use git to get the current commit hash.
+    let git_output = Command::new("git")
+        .args(["rev-parse", "HEAD"])
+        .output()
+        .expect("Failed to execute git command");
+
+    let git_hash = String::from_utf8_lossy(&git_output.stdout).trim().to_string();
+
+    // Write the git hash to a file as a constant.
+    writeln!(f, "pub const GIT_COMMIT: &str = \"{}\";", git_hash).unwrap();
+    println!("cargo:rerun-if-changed=.git/HEAD");
+    println!("cargo:rerun-if-changed=.git/index");
+}

src/main.rs

@@ -27,8 +27,6 @@ use utils::db;
 use crate::utils::rate_limit::RateLimiter;
 use crate::utils::structs::{APIResponse, APIStatus};
 
-use git2::Repository;
-
 use aws_sdk_s3::Client;
 
 extern crate rand;
@@ -40,6 +38,7 @@ extern crate rocket;
 extern crate fern;
 extern crate log;
 
+include!(concat!(env!("OUT_DIR"), "/git_commit.rs"));
 #[derive(rocket::FromForm, serde::Deserialize)]
 #[serde(crate = "rocket::serde")]
 struct UploadQuery {
@@ -340,25 +339,9 @@ struct Version {
 
 #[get("/version")]
 fn version(_rate_limiter: RateLimiter) -> Json<Version> {
-    let repo = Repository::discover(".");
-    let commit = match repo {
-        Ok(r) => {
-            let head = r.head();
-            match head {
-                Ok(reference) => {
-                    let peeling = reference.peel_to_commit();
-                    match peeling {
-                        Ok(commit) => Some(format!("{}", commit.id())),
-                        Err(_) => None,
-                    }
-                }
-                Err(_) => None,
-            }
-        }
-        Err(_) => None,
-    };
-
-    Json(Version { commit })
+    Json(Version {
+        commit: Some(GIT_COMMIT.to_string()),
+    })
 }
 
 #[launch]