GH-86: Fix exception causes being omitted from Maven output

ascopes · Feb 4, 2024 · 730fa6e · 730fa6e
1 parent fbff0d0
commit 730fa6e
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Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/src/main/java/io/github/ascopes/protobufmavenplugin/AbstractGenerateMojo.java b/src/main/java/io/github/ascopes/protobufmavenplugin/AbstractGenerateMojo.java
@@ -264,7 +264,9 @@ public void execute() throws MojoExecutionException, MojoFailureException {
         throw new MojoExecutionException("Protoc invocation failed");
       }
     } catch (ResolutionException | IOException ex) {
-      throw new MojoFailureException(this, ex.getMessage(), ex.getMessage());
+      var mojoFailureException = new MojoFailureException(this, ex.getMessage(), ex.getMessage());
+      mojoFailureException.initCause(ex);
+      throw mojoFailureException;
     }
   }
 

diff --git a/src/main/java/io/github/ascopes/protobufmavenplugin/source/ProtoSourceResolver.java b/src/main/java/io/github/ascopes/protobufmavenplugin/source/ProtoSourceResolver.java
@@ -95,8 +95,10 @@ public Collection<ProtoFileListing> createProtoFileListings(
     }
 
     if (!exceptions.isEmpty()) {
+      var causeIterator = exceptions.iterator();
       var ex = new IOException("Failed to create listings asynchronously");
-      exceptions.forEach(ex::addSuppressed);
+      ex.initCause(causeIterator.next());
+      causeIterator.forEachRemaining(ex::addSuppressed);
       throw ex;
     }