[jira] [Created] (MCOMPILER-307) Improve error message when compiler executable path invalid

["Bryan Parry (JIRA)" <ji...@apache.org>]

Bryan Parry created MCOMPILER-307:
-------------------------------------

             Summary: Improve error message when compiler executable path invalid
                 Key: MCOMPILER-307
                 URL: https://issues.apache.org/jira/browse/MCOMPILER-307
             Project: Maven Compiler Plugin
          Issue Type: Improvement
    Affects Versions: 3.6.2
            Reporter: Bryan Parry


When the compiler executable path and fork properties are set, and also the compiler executable file does not exist, a CompilationFailureException is thrown with a message: "Compilation failure". The plugin should be able to check whether the compiler executable is a valid file, and print a message if it does not exist (e.g. {{"Path to compiler executable " + path + " is invalid. File not found."}})

Here is an example of the maven compiler properties that can cause the error to occur:
{code}
<properties>
  <maven.compiler.executable>/invalid/path/to/bin/javac</maven.compiler.executable>
  <maven.compiler.fork>true</maven.compiler.fork>
</properties>
{code}



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