Make compare an always-async program.

This program is used as a development tool, so it is more valuable that we make it simple by only supporting one mode of operation (async) than making it widely compatible by supporting both.

Cargo.toml

@@ -53,8 +53,8 @@ walkdir = { version = "2.3.3", optional = true }
 walkdir = "2.3.3"
 
 [features]
-default = []
-compare = []
+default = ["compare", "foreign_document_test"]
+compare = ["dep:tokio"]
 foreign_document_test = ["compare", "dep:tokio", "dep:futures", "tokio/sync", "dep:walkdir"]
 tracing = ["dep:opentelemetry", "dep:opentelemetry-otlp", "dep:opentelemetry-semantic-conventions", "dep:tokio", "dep:tracing", "dep:tracing-opentelemetry", "dep:tracing-subscriber"]
 

src/bin_compare.rs

@@ -14,7 +14,12 @@ mod init_tracing;
 
 #[cfg(not(feature = "tracing"))]
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    main_body()
+    let rt = tokio::runtime::Runtime::new()?;
+    let result = rt.block_on(async {
+        let main_body_result = main_body().await;
+        main_body_result
+    });
+    result
 }
 
 #[cfg(feature = "tracing")]
@@ -30,7 +35,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 }
 
 #[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
-fn main_body() -> Result<(), Box<dyn std::error::Error>> {
+async fn main_body() -> Result<(), Box<dyn std::error::Error>> {
     let args = std::env::args().skip(1);
     if args.is_empty() {
         let org_contents = read_stdin_to_string()?;