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Build Failure in Eclipse 2020-09 due to Removal of Deprecated Class (IEP-242)

See original GitHub issue

I just updated Eclipse to version 2020-09 and reinstalled the ESP-IDF plugin (version 1.2.2). When building a project (imported using “Import -> Existing IDF Project”), I get the following error right at the start and the build stops:

java.lang.NoClassDefFoundError: org/eclipse/cdt/utils/Platform
	at com.espressif.idf.core.build.IDFBuildConfiguration.findCommand(IDFBuildConfiguration.java:588)
	at org.eclipse.cdt.core.build.CBuildConfiguration.startBuildProcess(CBuildConfiguration.java:493)
	at com.espressif.idf.core.build.IDFBuildConfiguration.build(IDFBuildConfiguration.java:252)
	at org.eclipse.cdt.core.build.CBuilder.build(CBuilder.java:45)
	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:832)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:220)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:263)
	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:316)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:319)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:278)
	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:467)
	at org.eclipse.core.internal.resources.Project$1.run(Project.java:565)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2292)
	at org.eclipse.core.internal.resources.Project.internalBuild(Project.java:603)
	at org.eclipse.core.internal.resources.Project.build(Project.java:116)
	at org.eclipse.debug.core.model.LaunchConfigurationDelegate.lambda$0(LaunchConfigurationDelegate.java:406)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2292)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2312)
	at org.eclipse.debug.core.model.LaunchConfigurationDelegate.buildProjects(LaunchConfigurationDelegate.java:412)
	at org.eclipse.debug.core.model.LaunchConfigurationDelegate.buildForLaunch(LaunchConfigurationDelegate.java:122)
	at org.eclipse.launchbar.core.target.launch.LaunchConfigurationTargetedDelegate.superBuildForLaunch(LaunchConfigurationTargetedDelegate.java:61)
	at com.espressif.idf.launch.serial.internal.SerialFlashLaunchConfigDelegate.buildForLaunch(SerialFlashLaunchConfigDelegate.java:180)
	at org.eclipse.launchbar.ui.internal.commands.BuildActiveCommandHandler$1$1.run(BuildActiveCommandHandler.java:110)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: java.lang.ClassNotFoundException: org.eclipse.cdt.utils.Platform cannot be found by com.espressif.idf.core_1.0.0.202008190353
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:516)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:171)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	... 26 more

A bit of googling lead me to this page that states:

Class org.eclipse.cdt.utils.Platform has been removed. Use org.eclipse.core.runtime.Platform instead.

Seems like that was a change from 2020-06 to 2020-09, and needs to be fixed in the ESP-IDF plugin in order to support Eclipse >= 2020-09. For the time being, I’m staying with 2020-06 where everything seems to work fine.