remove hard-coded version in favor of compile time build variable

Author: joshuadavidthomas

Cargo.lock

@@ -26,6 +26,9 @@ tracing = { workspace = true }
 tracing-appender = { workspace = true }
 tracing-subscriber = { workspace = true }
 
+[build-dependencies]
+toml = { workspace = true }
+
 [dev-dependencies]
 tempfile = { workspace = true }
 

crates/djls-server/Cargo.toml

@@ -0,0 +1,29 @@
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+
+fn main() {
+    println!("cargo:rerun-if-changed=build.rs");
+
+    let workspace_dir = env::var("CARGO_WORKSPACE_DIR").expect("CARGO_WORKSPACE_DIR not set");
+    let djls_cargo_toml = PathBuf::from(workspace_dir)
+        .join("crates")
+        .join("djls")
+        .join("Cargo.toml");
+
+    println!("cargo:rerun-if-changed={}", djls_cargo_toml.display());
+
+    let contents = fs::read_to_string(&djls_cargo_toml)
+        .unwrap_or_else(|_| panic!("Failed to read {}", djls_cargo_toml.display()));
+
+    let cargo_toml: toml::Value = toml::from_str(&contents)
+        .unwrap_or_else(|_| panic!("Failed to parse {}", djls_cargo_toml.display()));
+
+    let version = cargo_toml
+        .get("package")
+        .and_then(|p| p.get("version"))
+        .and_then(|v| v.as_str())
+        .expect("Failed to extract version from djls Cargo.toml");
+
+    println!("cargo:rustc-env=DJLS_VERSION={version}");
+}

crates/djls-server/build.rs

@@ -21,9 +21,6 @@ use crate::queue::Queue;
 use crate::session::Session;
 use crate::session::SessionSnapshot;
 
-const SERVER_NAME: &str = "Django Language Server";
-const SERVER_VERSION: &str = "0.1.0";
-
 pub struct DjangoLanguageServer {
     client: Client,
     session: Arc<Mutex<Session>>,
@@ -168,8 +165,8 @@ impl LanguageServer for DjangoLanguageServer {
                 ..Default::default()
             },
             server_info: Some(lsp_types::ServerInfo {
-                name: SERVER_NAME.to_string(),
-                version: Some(SERVER_VERSION.to_string()),
+                name: "Django Language Server".to_string(),
+                version: Some(env!("DJLS_VERSION").to_string()),
             }),
             offset_encoding: Some(encoding.to_string()),
         })