Codeanalyzer fails in when running on maven projects when gradle command is not found in the system path

[fabio-franco]

When the user is running on codeanalyzer on maven project, codeanalyzer raises an illegal state exception when gradle is not installed. This must not happen because the user can't be expected to have gradle install when they are using maven.

Steps to reproduce:

1. Make sure you don't have gradle installed in your machine:

gradle -v
zsh: command not found: gradle

2. Try to run the code analyzer over a maven project, which does not have any gradle file. For example, you can use https://github.ibm.com/was-svt/erww-lite or any other maven project.

[rofrano]

Here is a reproducible test case using aster-cli as the test environment:

$ wget https://github.com/IBM/codenet-minerva-code-analyzer/releases/download/v1.0.7/codeanalyzer-1.0.7.jar

$ docker run --rm -it -h dev -v $(pwd):/app -w /app mcr.microsoft.com/devcontainers/java:1-21-bullseye bash

$ apt-get update && apt-get install -y maven

$ mvn --version
Apache Maven 3.6.3
Maven home: /usr/share/maven
Java version: 21.0.2, vendor: Microsoft, runtime: /usr/lib/jvm/msopenjdk-current
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "6.6.51-0-virt", arch: "amd64", family: "unix"

$ gradle --version
bash: gradle: command not found

$ java -jar codeanalyzer-1.0.7.jar -v -i './resources/datasets/commons-cli' -a 2 -o './output/commons-cli'

The output is clearly looking for Gradle:

Exception in thread "main" java.lang.ExceptionInInitializerError
	at com.ibm.cldk.CodeAnalyzer.analyze(CodeAnalyzer.java:121)
	at com.ibm.cldk.CodeAnalyzer.run(CodeAnalyzer.java:101)
	at picocli.CommandLine.executeUserObject(CommandLine.java:1767)
	at picocli.CommandLine.access$900(CommandLine.java:145)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2139)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2106)
	at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:1973)
	at picocli.CommandLine.execute(CommandLine.java:1902)
	at com.ibm.cldk.CodeAnalyzer.main(CodeAnalyzer.java:92)
Caused by: java.lang.IllegalStateException: Could not file a valid gradle command. I did not find gradlew or gradle in the project directory or in the system PATH.
	at com.ibm.cldk.utils.BuildProject.getGradleCmd(BuildProject.java:61)
	at com.ibm.cldk.utils.BuildProject.<clinit>(BuildProject.java:24)
	... 9 more

This is 100% reproducible.

[rahlk]

It's not reproducible if the user had/has gradle installed.

One should have to uninstall gradle (if already installed) in order to reproduce this issue. This is not be something one should have to do.

What we need are a series of system tests that run this without gradle installed. Please see issue #84 to track this further.