Windows - dev mode - java.io.FileNotFoundException: \tmp\shamrock-classes\

[rsvoboda]

When running dev mode on Windows 10 there are several java.io.FileNotFoundException thrown

mvn shamrock:dev
...
java.io.FileNotFoundException: \tmp\shamrock-classes\com.example.demo.metric.MetricController_Subclass.class (Systém nemůže nalézt uvedenou cestu)
        at java.io.FileOutputStream.open0(Native Method)
        at java.io.FileOutputStream.open(FileOutputStream.java:270)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
        at org.jboss.shamrock.runner.RuntimeClassLoader.writeClass(RuntimeClassLoader.java:283)
        at org.jboss.shamrock.deployment.ShamrockAugmentor.run(ShamrockAugmentor.java:105)
        at org.jboss.shamrock.runner.RuntimeRunner.run(RuntimeRunner.java:85)
        at org.jboss.shamrock.dev.DevModeMain.doStart(DevModeMain.java:122)
        at org.jboss.shamrock.dev.DevModeMain.main(DevModeMain.java:83)
java.io.FileNotFoundException: \tmp\shamrock-classes\org.jboss.protean.arc.setup.Default_ComponentsProvider.class (Systém nemůže nalézt uvedenou cestu)
        at java.io.FileOutputStream.open0(Native Method)
        at java.io.FileOutputStream.open(FileOutputStream.java:270)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
        at org.jboss.shamrock.runner.RuntimeClassLoader.writeClass(RuntimeClassLoader.java:283)
        at org.jboss.shamrock.deployment.ShamrockAugmentor.run(ShamrockAugmentor.java:105)
        at org.jboss.shamrock.runner.RuntimeRunner.run(RuntimeRunner.java:85)
        at org.jboss.shamrock.dev.DevModeMain.doStart(DevModeMain.java:122)
        at org.jboss.shamrock.dev.DevModeMain.main(DevModeMain.java:83)
...

mvn -version
Apache Maven 3.5.3 (3383c37e1f9e9b3bc3df5050c29c8aff9f295297; 2018-02-24T20:49:05+01:00)
Maven home: c:\Users\Rostislav\Downloads\apache-maven-3.5.3\bin\..
Java version: 1.8.0_201, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.8.0_201\jre
Default locale: cs_CZ, platform encoding: Cp1250
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"

[rsvoboda]

https://github.com/jbossas/protean-shamrock/blob/master/core/deployment/src/main/java/io/quarkus/runner/RuntimeClassLoader.java#L278

/tmp/... path is hardcoded, Path tempDir = Files.createTempDirectory("quarkus-classes"); could be used insted

[dmlloyd]

See #1673 (comment)