build: add jdk 17 to java units and dependency builds (#1216)

.github/.OwlBot.lock.yaml

@@ -1,3 +1,3 @@
 docker:
   image: gcr.io/repo-automation-bots/owlbot-java:latest
-  digest: sha256:52b5557b7155a80e6f1684c2376d5eef0df6d8d5c785551e1ff8cc000603b62a
+  digest: sha256:13b7387edb404234610d30473ac48210ae7fe42a136335ee2b2f8a07c4c7f6a5

.github/blunderbuss.yml

@@ -1,5 +1,5 @@
 # Configuration for the Blunderbuss GitHub app. For more info see
-# https://github.com/googleapis/repo-automation-bots/tree/master/packages/blunderbuss
+# https://github.com/googleapis/repo-automation-bots/tree/main/packages/blunderbuss
 assign_prs_by:
 - labels:
   - samples

.github/workflows/ci.yaml

@@ -1,22 +1,23 @@
 on:
   push:
     branches:
-    - master
+    - main
   pull_request:
 name: ci
 jobs:
   units:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [8, 11]
+        java: [8, 11, 17]
     steps:
     - uses: actions/checkout@v2
     - uses: stCarolas/setup-maven@v4
       with:
         maven-version: 3.8.1
-    - uses: actions/setup-java@v1
+    - uses: actions/setup-java@v2
       with:
+        distribution: zulu
         java-version: ${{matrix.java}}
     - run: java -version
     - run: .kokoro/build.sh
@@ -29,8 +30,9 @@ jobs:
     - uses: stCarolas/setup-maven@v4
       with:
         maven-version: 3.8.1
-    - uses: actions/setup-java@v1
+    - uses: actions/setup-java@v2
       with:
+        distribution: zulu
         java-version: 8
     - run: java -version
     - run: .kokoro/build.bat
@@ -40,14 +42,15 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [8, 11]
+        java: [8, 11, 17]
     steps:
     - uses: actions/checkout@v2
     - uses: stCarolas/setup-maven@v4
       with:
         maven-version: 3.8.1
-    - uses: actions/setup-java@v1
+    - uses: actions/setup-java@v2
       with:
+        distribution: zulu
         java-version: ${{matrix.java}}
     - run: java -version
     - run: .kokoro/dependencies.sh
@@ -58,8 +61,9 @@ jobs:
     - uses: stCarolas/setup-maven@v4
       with:
         maven-version: 3.8.1
-    - uses: actions/setup-java@v1
+    - uses: actions/setup-java@v2
       with:
+        distribution: zulu
         java-version: 8
     - run: java -version
     - run: .kokoro/build.sh
@@ -72,8 +76,9 @@ jobs:
     - uses: stCarolas/setup-maven@v4
       with:
         maven-version: 3.8.1
-    - uses: actions/setup-java@v1
+    - uses: actions/setup-java@v2
       with:
+        distribution: zulu
         java-version: 8
     - run: java -version
     - run: .kokoro/build.sh

.kokoro/dependencies.sh

@@ -28,7 +28,28 @@ source ${scriptDir}/common.sh
 java -version
 echo $JOB_TYPE
 
-export MAVEN_OPTS="-Xmx1024m -XX:MaxPermSize=128m"
+function determineMavenOpts() {
+  local javaVersion=$(
+    # filter down to the version line, then pull out the version between quotes,
+    # then trim the version number down to its minimal number (removing any
+    # update or suffix number).
+    java -version 2>&1 | grep "version" \
+      | sed -E 's/^.*"(.*?)".*$/\1/g' \
+      | sed -E 's/^(1\.[0-9]\.0).*$/\1/g'
+  )
+
+  case $javaVersion in
+    "17")
+      # MaxPermSize is no longer supported as of jdk 17
+      echo -n "-Xmx1024m"
+      ;;
+    *)
+      echo -n "-Xmx1024m -XX:MaxPermSize=128m"
+      ;;
+  esac
+}
+
+export MAVEN_OPTS=$(determineMavenOpts)
 
 # this should run maven enforcer
 retry_with_backoff 3 10 \