feat: add solc install error report (#1027)

ethers-solc/src/compile/mod.rs

@@ -372,9 +372,16 @@ impl Solc {
     pub fn blocking_install(version: &Version) -> std::result::Result<(), svm::SolcVmError> {
         tracing::trace!("blocking installing solc version \"{}\"", version);
         crate::report::solc_installation_start(version);
-        svm::blocking_install(version)?;
-        crate::report::solc_installation_success(version);
-        Ok(())
+        match svm::blocking_install(version) {
+            Ok(_) => {
+                crate::report::solc_installation_success(version);
+                Ok(())
+            }
+            Err(err) => {
+                crate::report::solc_installation_error(version, &err.to_string());
+                Err(err)
+            }
+        }
     }
 
     /// Verify that the checksum for this version of solc is correct. We check against the SHA256

ethers-solc/src/remappings.rs

@@ -661,7 +661,7 @@ mod tests {
         assert_eq!(relative.path.original(), Path::new(&remapping.path));
         assert!(relative.path.parent.is_none());
 
-        let relative = RelativeRemapping::new(remapping.clone(), "/a/b");
+        let relative = RelativeRemapping::new(remapping, "/a/b");
         assert_eq!(relative.to_relative_remapping(), Remapping::from_str("oz/=c/d/").unwrap());
     }
 

ethers-solc/src/report.rs

@@ -99,9 +99,12 @@ pub trait Reporter: 'static {
     /// Invoked before a new [`Solc`] bin is installed
     fn on_solc_installation_start(&self, _version: &Version) {}
 
-    /// Invoked before a new [`Solc`] bin was successfully installed
+    /// Invoked after a new [`Solc`] bin was successfully installed
     fn on_solc_installation_success(&self, _version: &Version) {}
 
+    /// Invoked after a [`Solc`] installation failed
+    fn on_solc_installation_error(&self, _version: &Version, _error: &str) {}
+
     /// Invoked if the import couldn't be resolved with these remappings
     fn on_unresolved_import(&self, _import: &Path, _remappings: &[Remapping]) {}
 
@@ -166,6 +169,11 @@ pub(crate) fn solc_installation_success(version: &Version) {
     get_default(|r| r.reporter.on_solc_installation_success(version));
 }
 
+#[allow(unused)]
+pub(crate) fn solc_installation_error(version: &Version, error: &str) {
+    get_default(|r| r.reporter.on_solc_installation_error(version, error));
+}
+
 pub(crate) fn unresolved_import(import: &Path, remappings: &[Remapping]) {
     get_default(|r| r.reporter.on_unresolved_import(import, remappings));
 }
@@ -308,6 +316,10 @@ impl Reporter for BasicStdoutReporter {
         println!("Successfully installed solc {}", version);
     }
 
+    fn on_solc_installation_error(&self, version: &Version, error: &str) {
+        eprintln!("Failed to install solc {}: {}", version, error);
+    }
+
     fn on_unresolved_import(&self, import: &Path, remappings: &[Remapping]) {
         println!(
             "Unable to resolve import: \"{}\" with remappings:\n    {}",