check whether correct target arg passed in

rustwasm · Jan 10, 2019 · ea3140c · ea3140c
1 parent 8af4002
commit ea3140c
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/src/command/build.rs b/src/command/build.rs
@@ -87,8 +87,8 @@ pub struct BuildOptions {
     #[structopt(long = "scope", short = "s")]
     pub scope: Option<String>,
 
-    #[structopt(long = "mode", short = "m", default_value = "normal")]
-    /// Sets steps to be run. [possible values: no-install, normal]
+    #[structopt(long = "mode", short = "m")]
+    /// Sets steps to be run. [possible values: no-install, normal, force]
     pub mode: BuildMode,
 
     #[structopt(long = "no-typescript")]
@@ -158,6 +158,12 @@ impl Build {
             _ => bail!("Can only supply one of the --dev, --release, or --profiling flags"),
         };
 
+        // `possible_values` in clap isn't supported by `structopt`
+        let possible_targets = ["browser", "nodejs", "no-modules"];
+        if !possible_targets.contains(&build_opts.target.as_str()) {
+            bail!("Supported targets: browser, nodejs, no-modules");
+        }
+
         Ok(Build {
             crate_path,
             crate_data,