fix: fix component install when fail to be installed at the first time

src/download.rs

@@ -207,7 +207,8 @@ pub fn download_file(url: &str, path: &PathBuf) -> Result<()> {
                 response.into_reader().read_to_end(&mut data)?;
 
                 if let Err(e) = file.write_all(&data) {
-                    error!(
+                    fs::remove_file(path)?;
+                    bail!(
                         "Something went wrong writing data to {}: {}",
                         path.display(),
                         e
@@ -225,12 +226,14 @@ pub fn download_file(url: &str, path: &PathBuf) -> Result<()> {
                 thread::sleep(Duration::from_secs(retry));
             }
             Err(e) => {
+                fs::remove_file(path)?;
                 // handle other status code and non-status code errors
                 bail!("Unexpected error: {}", e.to_string());
             }
         }
     }
 
+    fs::remove_file(path)?;
     bail!("Could not download file");
 }
 

src/toolchain.rs

@@ -268,7 +268,7 @@ impl Toolchain {
             &download_cfg.name, &download_cfg.version, self.name
         );
 
-        if !store.has_component(&download_cfg.name, &download_cfg.version) {
+        if !store.has_component(&download_cfg.name, &download_cfg.version) || !self.has_component(&download_cfg.name) {
             match store.install_component(&download_cfg) {
                 Ok(downloaded) => {
                     for bin in downloaded {