Enable quarkus:dev to hot-reload resources from non-standard paths

[hacst]

Description
quarkus:dev should allow hot-reloading of resources specified in the pom using build resources entries (see https://maven.apache.org/plugins/maven-resources-plugin/examples/resource-directory.html).

Example pom.xml snippet:

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  ...
  <build>
    <resources>
      <resource> <!-- Standard resource path -->
        <directory>src/main/resources</directory>
      </resource>
      <resource> <!-- Additional custom resource path currently not hot-reloaded by quarkus:dev -->
        <directory>configurations/common</directory>
        <targetPath>${project.build.directory}/configurations/common</targetPath>
      </resource>
    </resources>
    ...
  </build>
...

[famod]

Isn't that basically the same as #10234?

[hacst]

@famod Not sure I fully understand that issue. From what I can tell everything in /src/main/resources/ is "watched" and automatically copied over to target/classes on change when the next request hits. Other resources aren't (which is the problem I stumbled over). Also specifying additional files to watch without something that defines where they go on change doesn't seem helpful for my use-case. I am not familiar with how quarkus implements this feature so I might be missing something.

The advantage of supporting the normal way additional resources are defined with maven directly instead of having quarkus dev specific parameters would be that you do not have to configure things twice with potential divergence issues down the road.

[38leinaD]

I would also be interested to see this working from a Gradle-perspective; just unsure what is the right way.
The usecase I basically have is that i have a Gradle multi-module-project. One module is the main quarkus app and it depends on a project that contains a plain HTML 5 frontend that should be packaged/served from the Quarkus app.
When running in dev-mode, the frontend can actually be served in modern browser without running a build-step; that's why i would like it if quakus-dev could be told to watch an additional folder from the frontend project; modifications to the frontend would be available immediately without running a full build.
Today, i still need a seperate server/tool that serves the frontend (e.g. browsersync) so i can work an frontend and backend at the same time.
i hope this explaination makes sens.
would be apply to help out in getting this off the ground.

[famod]

@hacst Quarkus is only "watching" a defined set of file names.
See also: https://github.com/quarkusio/quarkus/blob/1.6.0.CR1/core/deployment/src/main/java/io/quarkus/deployment/dev/RuntimeUpdatesProcessor.java

I've created PR #10328 to define custom file names to watch, but those must exist in the respective io.quarkus.deployment.dev.DevModeContext.ModuleInfo.getResourcePath().

[hacst]

@famod I am unsure but we might be talking about different things here. As I mentioned I'm woefully unaware of quarkus internals an might be using wrong terminology. Using the code-with-quarkus example I can do:

$:code-with-quarkus/src/main/resources$ touch foo.bar
$:code-with-quarkus/src/main/resources$ ls ../../../target/classes/
application.properties  META-INF  org
$:code-with-quarkus/src/main/resources$ curl localhost:8080/hello
hello
$:code-with-quarkus/src/main/resources$ ls ../../../target/classes/
application.properties  foo.bar  META-INF  org

As you can see an arbitrarily named file like foo.bar is picked up/updated by quarkus:dev once I load the page as long as it resides in the src/main/resources directory. Ideally I would like to see quarkus do that for other resources I specify in my pom.xml.

The specific use case I have right now is additional configuration provided by custom ConfigProviders that is read from the cwd in the server. It comes from outside of the src/ folder and isn't supposed to go into the jar. Right now I have to manually run the maven process-resource phase on the side to get the resource plugin to execute instead of quarkus:dev picking it up like the hard-coded resource folder.

[ghost]

I have another use case for this, it would be nice to also exclude the same folders than are exclude on a production build. For example, I don't need to quarkus dev watches for changes on my node_modules folder, which makes it crash.

2020-07-02 10:02:14,879 ERROR [io.qua.dep.dev.DevModeMain] (main) Failed to start Quarkus: java.lang.RuntimeException: io.quarkus.builder.BuildException: Build failure: Build failed due to errors                                                                                                                                                                                          
        [error]: Build step io.quarkus.deployment.steps.MainClassBuildStep#build threw an exception: org.objectweb.asm.ClassTooLargeException: Class too large: io/quarkus/deployment/steps/ResteasyStandaloneBuildStep$staticInit32                                                                                                                                                         
        at org.objectweb.asm.ClassWriter.toByteArray(ClassWriter.java:599)                                                                                                                                                                                                                                                                                                                   
        at io.quarkus.gizmo.ClassCreator.writeTo(ClassCreator.java:192)                                                                                                                                                                                                                                                                                                                      
        at io.quarkus.gizmo.ClassCreator.close(ClassCreator.java:203)                                                                                                                                                                                                                                                                                                                        
        at io.quarkus.deployment.recording.BytecodeRecorderImpl.writeBytecode(BytecodeRecorderImpl.java:475)                                                                                                                                                                                                                                                                                 
        at io.quarkus.deployment.steps.MainClassBuildStep.writeRecordedBytecode(MainClassBuildStep.java:360)                                                                                                                                                                                                                                                                                 
        at io.quarkus.deployment.steps.MainClassBuildStep.build(MainClassBuildStep.java:141)                                                                                                                                                                                                                                                                                                 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)                                                                                                                                                                                                                                                                                                                       
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)                                                                                                                                                                                                                                                                                                     
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)                                                                                                                                                                                                                                                                                             
        at java.lang.reflect.Method.invoke(Method.java:498)                                                                                                                                                                                                                                                                                                                                  
        at io.quarkus.deployment.ExtensionLoader$2.execute(ExtensionLoader.java:931)                                                                                                                                                                                                                                                                                                         
        at io.quarkus.builder.BuildContext.run(BuildContext.java:277)                                                                                                                                                                                                                                                                                                                        
        at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)                                                                                                                                                                                                                                                                                  
        at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2046)                                                                                                                                                                                                                                                                                                  
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1578)                                                                                                                                                                                                                                                                                     
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1452)                                                                                                                                                                                                                                                                                           
        at java.lang.Thread.run(Thread.java:748)                                                                                                                                                                                                                                                                                                                                             
        at org.jboss.threads.JBossThread.run(JBossThread.java:479)                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                                                                             
        at io.quarkus.runner.bootstrap.AugmentActionImpl.runAugment(AugmentActionImpl.java:247)                                                                                                                                                                                                                                                                                              
        at io.quarkus.runner.bootstrap.AugmentActionImpl.createInitialRuntimeApplication(AugmentActionImpl.java:130)                                                                                                                                                                                                                                                                         
        at io.quarkus.runner.bootstrap.AugmentActionImpl.createInitialRuntimeApplication(AugmentActionImpl.java:52)                                                                                                                                                                                                                                                                          
        at io.quarkus.deployment.dev.IsolatedDevModeMain.firstStart(IsolatedDevModeMain.java:62)                                                                                                                                                                                                                                                                                             
        at io.quarkus.deployment.dev.IsolatedDevModeMain.accept(IsolatedDevModeMain.java:268)                                                                                                                                                                                                                                                                                                
        at io.quarkus.deployment.dev.IsolatedDevModeMain.accept(IsolatedDevModeMain.java:40)                                                                                                                                                                                                                                                                                                 
        at io.quarkus.bootstrap.app.CuratedApplication.runInCl(CuratedApplication.java:129)                                                                                                                                                                                                                                                                                                  
        at io.quarkus.bootstrap.app.CuratedApplication.runInAugmentClassLoader(CuratedApplication.java:82)                                                                                                                                                                                                                                                                                   
        at io.quarkus.deployment.dev.DevModeMain.start(DevModeMain.java:119)                                                                                                                                                                                                                                                                                                                 
        at io.quarkus.deployment.dev.DevModeMain.main(DevModeMain.java:56)                                                                                                                                                                                                                                                                                                                   
Caused by: io.quarkus.builder.BuildException: Build failure: Build failed due to errors                                                                                                                                                                                                                                                                                                      
        [error]: Build step io.quarkus.deployment.steps.MainClassBuildStep#build threw an exception: org.objectweb.asm.ClassTooLargeException: Class too large: io/quarkus/deployment/steps/ResteasyStandaloneBuildStep$staticInit32                                                                                                                                                         
        at org.objectweb.asm.ClassWriter.toByteArray(ClassWriter.java:599)                                                                                                                                                                                                                                                                                                                   
        at io.quarkus.gizmo.ClassCreator.writeTo(ClassCreator.java:192)                                                                                                                                                                                                                                                                                                                      
        at io.quarkus.gizmo.ClassCreator.close(ClassCreator.java:203)                                                                                                                                                                                                                                                                                                                        
        at io.quarkus.deployment.recording.BytecodeRecorderImpl.writeBytecode(BytecodeRecorderImpl.java:475)                                                                                                                                                                                                                                                                                 
        at io.quarkus.deployment.steps.MainClassBuildStep.writeRecordedBytecode(MainClassBuildStep.java:360)                                                                                                                                                                                                                                                                                 
        at io.quarkus.deployment.steps.MainClassBuildStep.build(MainClassBuildStep.java:141)                                                                                                                                                                                                                                                                                                 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)                                                                                                                                                                                                                                                                                                                       
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)                                                                                                                                                                                                                                                                                                     
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)                                                                                                                                                                                                                                                                                             
        at java.lang.reflect.Method.invoke(Method.java:498)                                                                                                                                                                                                                                                                                                                                  
        at io.quarkus.deployment.ExtensionLoader$2.execute(ExtensionLoader.java:931)                                                                                                                                                                                                                                                                                                         
        at io.quarkus.builder.BuildContext.run(BuildContext.java:277)                                                                                                                                                                                                                                                                                                                        
        at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)                                                                                                                                                                                                                                                                                  
        at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2046)                                                                                                                                                                                                                                                                                                  
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1578)                                                                                                                                                                                                                                                                                     
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1452)                                                                                                                                                                                                                                                                                           
        at java.lang.Thread.run(Thread.java:748)                                                                                                                                                                                                                                                                                                                                             
        at org.jboss.threads.JBossThread.run(JBossThread.java:479)                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                                                                             
        at io.quarkus.builder.Execution.run(Execution.java:115)                                                                                                                                                                                                                                                                                                                              
        at io.quarkus.builder.BuildExecutionBuilder.execute(BuildExecutionBuilder.java:79)                                                                                                                                                                                                                                                                                                   
        at io.quarkus.deployment.QuarkusAugmentor.run(QuarkusAugmentor.java:156)                                                                                                                                                                                                                                                                                                             
        at io.quarkus.runner.bootstrap.AugmentActionImpl.runAugment(AugmentActionImpl.java:245)                                                                                                                                                                                                                                                                                              
        ... 9 more                                                                                                                                                                                                                                                                                                                                                                           
Caused by: org.objectweb.asm.ClassTooLargeException: Class too large: io/quarkus/deployment/steps/ResteasyStandaloneBuildStep$staticInit32                                                                                                                                                                                                                                                   
        at org.objectweb.asm.ClassWriter.toByteArray(ClassWriter.java:599)                                                                                                                                                                                                                                                                                                                   
        at io.quarkus.gizmo.ClassCreator.writeTo(ClassCreator.java:192)                                                                                                                                                                                                                                                                                                                      
        at io.quarkus.gizmo.ClassCreator.close(ClassCreator.java:203)                                                                                                                                                                                                                                                                                                                        
        at io.quarkus.deployment.recording.BytecodeRecorderImpl.writeBytecode(BytecodeRecorderImpl.java:475)
        at io.quarkus.deployment.steps.MainClassBuildStep.writeRecordedBytecode(MainClassBuildStep.java:360)
        at io.quarkus.deployment.steps.MainClassBuildStep.build(MainClassBuildStep.java:141)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at io.quarkus.deployment.ExtensionLoader$2.execute(ExtensionLoader.java:931)
        at io.quarkus.builder.BuildContext.run(BuildContext.java:277)
        at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
        at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2046)
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1578)
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1452)
        at java.lang.Thread.run(Thread.java:748)
        at org.jboss.threads.JBossThread.run(JBossThread.java:479)

[essobedo]

A potential PR for this #17184