feat(err messages): Make err messages nicer

src/bindgen.rs

@@ -18,8 +18,8 @@ pub fn cargo_install_wasm_bindgen() -> Result<(), Error> {
     pb.finish();
     if !output.status.success() {
         let s = String::from_utf8_lossy(&output.stderr);
-        PBAR.error("npm_publish failed");
-        bail!(format!("stderr was {}", s));
+        PBAR.error("Installing wasm-bindgen failed");
+        bail!(format!("Details:\n{}", s));
     } else {
         Ok(())
     }
@@ -43,8 +43,8 @@ pub fn wasm_bindgen_build(path: &str, name: &str) -> Result<(), Error> {
     pb.finish();
     if !output.status.success() {
         let s = String::from_utf8_lossy(&output.stderr);
-        PBAR.error("npm_publish failed");
-        bail!(format!("stderr was {}", s));
+        PBAR.error("wasm-bindgen failed to execute properly");
+        bail!(format!("Details:\n{}", s));
     } else {
         Ok(())
     }

src/build.rs

@@ -19,8 +19,8 @@ pub fn rustup_add_wasm_target() -> Result<(), Error> {
     pb.finish();
     if !output.status.success() {
         let s = String::from_utf8_lossy(&output.stderr);
-        PBAR.error("rustup_add_wasm_target failed");
-        bail!(format!("stderr was {}", s));
+        PBAR.error("Adding the wasm32-unknown-unknown target failed");
+        bail!(format!("Details:\n{}", s));
     } else {
         Ok(())
     }
@@ -43,8 +43,8 @@ pub fn cargo_build_wasm(path: &str) -> Result<(), Error> {
     pb.finish();
     if !output.status.success() {
         let s = String::from_utf8_lossy(&output.stderr);
-        PBAR.error("cargo_build_wasm failed");
-        bail!(format!("stderr was {}", s));
+        PBAR.error("Compilation of your program failed");
+        bail!(format!("Details:\n{}", s));
     } else {
         Ok(())
     }

src/npm.rs

@@ -10,8 +10,8 @@ pub fn npm_pack(path: &str) -> Result<(), Error> {
         .output()?;
     if !output.status.success() {
         let s = String::from_utf8_lossy(&output.stderr);
-        PBAR.error("npm_pack failed");
-        bail!(format!("stderr was {}", s));
+        PBAR.error("Packaging up your code failed");
+        bail!(format!("Details:\n{}", s));
     } else {
         Ok(())
     }
@@ -25,8 +25,8 @@ pub fn npm_publish(path: &str) -> Result<(), Error> {
         .output()?;
     if !output.status.success() {
         let s = String::from_utf8_lossy(&output.stderr);
-        PBAR.error("npm_publish failed");
-        bail!(format!("stderr was {}", s));
+        PBAR.error("Publishing to npm failed");
+        bail!(format!("Details:\n{}", s));
     } else {
         Ok(())
     }