Expose toolchains to some Android tests, which would otherwise now try to upgrade to JDK17

java/integration-tests-lib/toolchains_test_utils.py

@@ -0,0 +1,42 @@
+import os.path
+import sys
+import tempfile
+
+def actions_expose_all_toolchains():
+
+  # On actions, expose all usable toolchains so that we can test version-selection logic.
+
+  toolchains_dir = tempfile.mkdtemp(prefix="integration-tests-toolchains-")
+  toolchains_file = os.path.join(toolchains_dir, "toolchains.xml")
+
+  def none_or_blank(s):
+    return s is None or s == ""
+
+  with open(toolchains_file, "w") as f:
+    f.write('<?xml version="1.0" encoding="UTF-8"?>\n<toolchains>\n')
+
+    for v in [8, 11, 17, 21]:
+      homedir = os.getenv("JAVA_HOME_%d_X64" % v)
+      if none_or_blank(homedir):
+        homedir = os.getenv("JAVA_HOME_%d_arm64" % v)
+      if none_or_blank(homedir) and v == 8 and not none_or_blank(os.getenv("JAVA_HOME_11_arm64")):
+        print("Mocking a toolchain entry using Java 11 install as a fake Java 8 entry, so this test behaves the same on x64 and arm64 runners", file = sys.stderr)
+        homedir = os.getenv("JAVA_HOME_11_arm64")
+      if homedir is not None and homedir != "":
+        f.write("""
+          <toolchain>
+            <type>jdk</type>
+            <provides>
+              <version>%d</version>
+              <vendor>oracle</vendor>
+            </provides>
+            <configuration>
+              <jdkHome>%s</jdkHome>
+            </configuration>
+          </toolchain>
+          """ % (v, homedir))
+
+    f.write("</toolchains>")
+
+  return toolchains_file
+