Add sdk version to contract meta automatically

soroban-sdk-macros/Cargo.toml

@@ -14,6 +14,9 @@ rust-version = "1.70"
 proc-macro = true
 doctest = false
 
+[build_dependencies]
+crate-git-revision = "0.0.6"
+
 [dependencies]
 soroban-spec = { workspace = true }
 soroban-spec-rust = { workspace = true }

soroban-sdk-macros/build.rs

@@ -0,0 +1,3 @@
+pub fn main() {
+    crate_git_revision::init();
+}

soroban-sdk-macros/src/lib.rs

@@ -233,6 +233,30 @@ pub fn contractimpl(metadata: TokenStream, input: TokenStream) -> TokenStream {
     }
 }
 
+#[proc_macro]
+pub fn contractmetasdkversion(_metadata: TokenStream) -> TokenStream {
+    // The following two lines assume that the soroban-sdk-macros crate always
+    // has the same version as the soroban-sdk, and lives in the same
+    // repository.
+    let pkg_version = env!("CARGO_PKG_VERSION");
+    let git_revision = env!("GIT_REVISION");
+    let version = format!("{pkg_version}#{git_revision}");
+    quote! {
+        // TODO:
+        // contractmeta!(
+        //     // Rustc version.
+        //     key = "rsver",
+        //     val = #version,
+        // );
+        contractmeta!(
+            // Rust Soroban SDK version.
+            key = "rssdkver",
+            val = #version,
+        );
+    }
+    .into()
+}
+
 #[derive(Debug, FromMeta)]
 struct MetadataArgs {
     key: String,

soroban-sdk/src/lib.rs

@@ -104,6 +104,8 @@ mod alloc;
 fn __link_sections() {
     #[link_section = "contractenvmetav0"]
     static __ENV_META_XDR: [u8; env::meta::XDR.len()] = env::meta::XDR;
+
+    soroban_sdk_macros::contractmetasdkversion!();
 }
 
 // Re-exports of dependencies used by macros.