rust: add dry run mode to upload-release-distribution

Author: indygreg

src/github.rs

@@ -189,6 +189,7 @@ pub async fn command_upload_release_distributions(args: &ArgMatches) -> Result<(
         .value_of("organization")
         .expect("organization should be specified");
     let repo = args.value_of("repo").expect("repo should be specified");
+    let dry_run = args.is_present("dry_run");
 
     let mut filenames = std::fs::read_dir(&dist_dir)?
         .into_iter()
@@ -287,6 +288,10 @@ pub async fn command_upload_release_distributions(args: &ArgMatches) -> Result<(
             .header("Content-Type", "application/x-tar")
             .body(file_data);
 
+        if dry_run {
+            continue;
+        }
+
         let response = client.execute(request).await?;
 
         if !response.status().is_success() {

src/main.rs

@@ -104,6 +104,11 @@ fn main_impl() -> Result<()> {
                     .takes_value(true)
                     .help("Date/time tag associated with builds"),
             )
+            .arg(
+                Arg::new("dry_run")
+                    .short('n')
+                    .help("Dry run mode; do not actually upload"),
+            )
             .arg(
                 Arg::new("tag")
                     .long("--tag")