Verify that cargo xtask publish will work

This change allows us to perform a `publish --dry-run` for each of the
crates to make sure this still works. Note that `cargo xtask publish
--dry-run` will use, by default, the `dynamic-linking` feature of
`openvino-sys` which requires an OpenVINO installation to compile
against.

.github/workflows/main.yml

@@ -90,6 +90,8 @@ jobs:
       run: |
         source /opt/intel/openvino_2022/setupvars.sh
         cargo test --features openvino-sys/runtime-linking
+    - name: Verify publish
+      run: cargo xtask publish --dry-run
 
   # Build and test from an existing OpenVINO installation inside a Docker image (i.e. download the
   # binaries, then compile against these).

crates/xtask/src/publish.rs

@@ -42,22 +42,25 @@ impl PublishCommand {
         let crates_dir = path_to_crates()?;
         for krate in PUBLICATION_ORDER {
             println!("> publish {}", krate);
-            if !self.dry_run {
-                let krate_dir = crates_dir.clone().join(krate);
-                let exec_result = exec(
-                    Command::new("cargo")
-                        .arg("publish")
-                        .arg("--no-verify")
-                        .current_dir(&krate_dir),
-                );
+            let krate_dir = crates_dir.clone().join(krate);
+            let mut command = Command::new("cargo");
+            command.current_dir(&krate_dir).arg("publish");
+            if self.dry_run {
+                command.arg("--dry-run");
+            } else {
+                command.arg("--no-verify");
+            }
 
-                // We want to continue even if a crate does not publish: this allows us to re-run
-                // the `publish` command if uploading one or more crates fails.
-                if let Err(e) = exec_result {
-                    println!("Failed to publish crate {}, continuing:\n  {}", krate, e);
-                }
+            let exec_result = exec(&mut command);
 
-                // Hopefully this gives crates.io enough time for subsequent publications to work.
+            // We want to continue even if a crate does not publish: this allows us to re-run
+            // the `publish` command if uploading one or more crates fails.
+            if let Err(e) = exec_result {
+                println!("Failed to publish crate {}, continuing:\n  {}", krate, e);
+            }
+
+            // Hopefully this gives crates.io enough time for subsequent publications to work.
+            if !self.dry_run {
                 sleep(Duration::from_secs(20));
             }
         }