Testing TMPDIR in /dev/shm

.github/workflows/ci-ramdisk.yml

@@ -0,0 +1,48 @@
+---
+name: ci-ramdisk
+
+on:
+  push:
+    branches:
+      - main
+    tags-ignore:
+      - "*"
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch: {}
+
+concurrency:
+  group: ci-ramdisk-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  GRADLE_SWITCHES: --console=plain --info --stacktrace --warning-mode=all --no-daemon
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+          show-progress: false
+
+      - uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: |
+            25
+            21
+
+      - uses: astral-sh/setup-uv@v7
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v5
+        with:
+          develocity-access-key: ${{ secrets.GRADLE_ENTERPRISE_ACCESS_KEY }}
+
+      - name: build
+        run: ./gradlew ${{ env.GRADLE_SWITCHES }} build
+        env:
+          TMPDIR: /dev/shm

rewrite-core/src/main/java/org/openrewrite/ExecutionContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2026 the original author or authors.
  * <p>
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

rewrite-core/src/main/java/org/openrewrite/Recipe.java

@@ -77,6 +77,7 @@ public abstract class Recipe implements Cloneable {
     @SuppressWarnings("unused")
     @JsonProperty("@c")
     public String getJacksonPolymorphicTypeTag() {
+        System.out.println("tmpdir=" + System.getProperty("java.io.tmpdir"));
         return getClass().getName();
     }