Merge pull request #435 from jmtd/measure.sh

Measure.sh: image size measurement helper

Author: jmtd

measure.sh

@@ -0,0 +1,51 @@
+# script to measure the sizes (and size savings)
+
+S2I=${S2I-s2i}
+ENGINE=${ENGINE-docker} # or e.g. podman
+BASEIMG=registry.access.redhat.com/ubi9/openjdk-17:latest
+APPSRC=https://github.com/quarkusio/quarkus-quickstarts
+CONTEXTDIR=getting-started
+rev=3.6.6
+OUTIMG=out-s2i-image
+
+# first build the image using shipped builder images
+$S2I build --pull-policy never \
+    -e MAVEN_S2I_ARTIFACT_DIRS=target \
+    -e S2I_SOURCE_DEPLOYMENTS_FILTER="*.jar quarkus-app" \
+    -e QUARKUS_PACKAGE_TYPE=uber-jar \
+    -e MAVEN_CLEAR_REPO=true \
+    -e JAVA_APP_JAR=getting-started-1.0.0-SNAPSHOT-runner.jar \
+    --context-dir=$CONTEXTDIR -r=${rev} \
+    $APPSRC \
+    $BASEIMG \
+    $OUTIMG
+
+echo "baseline (simple S2I output):"
+${ENGINE} inspect -f '{{.Size}}' $OUTIMG
+
+# second, do a build with the image from jlink-dev branch
+# make sure it's been built!
+# NOTE: we override most variables from .s2i/environment in the quickstart
+# sources below, in order to an uber-jar.
+BASEIMG=ubi9/openjdk-17:latest
+OUTIMG=ubi9-jlinked-image # matches input in templates/jlink/Dockerfile
+
+$S2I build --pull-policy never \
+    -e S2I_ENABLE_JLINK=true \
+    -e MAVEN_S2I_ARTIFACT_DIRS=target \
+    -e S2I_SOURCE_DEPLOYMENTS_FILTER="*.jar quarkus-app" \
+    -e QUARKUS_PACKAGE_TYPE=uber-jar \
+    -e JAVA_APP_JAR=getting-started-1.0.0-SNAPSHOT-runner.jar \
+    --context-dir=$CONTEXTDIR -r=${rev} \
+    $APPSRC \
+    $BASEIMG \
+    $OUTIMG
+
+echo "intermediate jlink image size:"
+docker inspect -f '{{.Size}}' $OUTIMG
+
+# third, run the above thru the second-stage process
+OUTIMG=jlink-final
+${ENGINE} build -t "$OUTIMG" templates/jlink
+echo "final jlinked image size:"
+docker inspect -f '{{.Size}}' "$OUTIMG"