Replace vergen (#580)

crates/kitsune-core/Cargo.toml

@@ -4,11 +4,11 @@ authors.workspace = true
 edition.workspace = true
 version.workspace = true
 license.workspace = true
-build = "build.rs"
 
 [dependencies]
 async-trait = "0.1.82"
 const_format = "0.2.33"
+git-version = "0.3.9"
 kitsune-db = { workspace = true }
 kitsune-error = { workspace = true }
 paste = "1.0.15"
@@ -17,8 +17,5 @@ triomphe = { workspace = true }
 typed-builder = "0.20.0"
 unsize = "1.1.0"
 
-[build-dependencies]
-vergen-gitcl = { version = "1.0.0", features = ["build"] }
-
 [lints]
 workspace = true

crates/kitsune-core/src/consts.rs

@@ -1,8 +1,23 @@
 use const_format::concatcp;
+use git_version::git_version;
 
 pub const API_MAX_LIMIT: usize = 40;
 pub const MAX_EMOJI_SHORTCODE_LENGTH: usize = 64;
 pub const MAX_MEDIA_DESCRIPTION_LENGTH: usize = 5000;
-pub const PROJECT_IDENTIFIER: &str = env!("CARGO_PRIMARY_PACKAGE");
+
+pub const PROJECT_IDENTIFIER: &str = const {
+    const FALLBACK_NAME: &str = "kitsune";
+
+    if let Some(package_name) = option_env!("CARGO_PRIMARY_PACKAGE") {
+        package_name
+    } else {
+        FALLBACK_NAME
+    }
+};
+
 pub const USER_AGENT: &str = concatcp!(PROJECT_IDENTIFIER, "/", VERSION);
-pub const VERSION: &str = concatcp!(env!("CARGO_PKG_VERSION"), "-", env!("VERGEN_GIT_SHA"));
+pub const VERSION: &str = concatcp!(
+    env!("CARGO_PKG_VERSION"),
+    "-",
+    git_version!(fallback = "unknown")
+);