Rewrite Env2yaml in java instead of Go

.gitignore

@@ -16,7 +16,6 @@ out
 local
 test/setup/elasticsearch/elasticsearch-*
 vendor
-!docker/ironbank/go/src/env2yaml/vendor
 .sass-cache
 /data
 .buildpath

build.gradle

@@ -302,6 +302,13 @@ tasks.register("bootstrap") {
 }
 
 
+
+task dockerBootstrap {
+    description = "Docker bootstrap ensures env2yaml java is compiled and staged for inclusion in tarballs"
+    dependsOn bootstrap
+    dependsOn ':docker:data:logstash:env2yaml:compileJava'
+}
+
 tasks.register("installDefaultGems") {
     dependsOn bootstrap
     doLast {

docker/Makefile

@@ -69,7 +69,7 @@ build-from-local-observability-sre-artifacts: dockerfile
 
 COPY_FILES := $(ARTIFACTS_DIR)/docker/config/pipelines.yml $(ARTIFACTS_DIR)/docker/config/logstash-oss.yml $(ARTIFACTS_DIR)/docker/config/logstash-full.yml
 COPY_FILES += $(ARTIFACTS_DIR)/docker/config/log4j2.file.properties $(ARTIFACTS_DIR)/docker/config/log4j2.properties
-COPY_FILES += $(ARTIFACTS_DIR)/docker/env2yaml/env2yaml.go $(ARTIFACTS_DIR)/docker/env2yaml/go.mod $(ARTIFACTS_DIR)/docker/env2yaml/go.sum
+COPY_FILES += $(ARTIFACTS_DIR)/docker/env2yaml/env2yaml
 COPY_FILES += $(ARTIFACTS_DIR)/docker/pipeline/default.conf $(ARTIFACTS_DIR)/docker/bin/docker-entrypoint
 
 $(ARTIFACTS_DIR)/docker/config/pipelines.yml: data/logstash/config/pipelines.yml
@@ -79,9 +79,7 @@ $(ARTIFACTS_DIR)/docker/config/log4j2.file.properties: data/logstash/config/log4
 $(ARTIFACTS_DIR)/docker/config/log4j2.properties: data/logstash/config/log4j2.properties
 $(ARTIFACTS_DIR)/docker/pipeline/default.conf: data/logstash/pipeline/default.conf
 $(ARTIFACTS_DIR)/docker/bin/docker-entrypoint: data/logstash/bin/docker-entrypoint
-$(ARTIFACTS_DIR)/docker/env2yaml/env2yaml.go: data/logstash/env2yaml/env2yaml.go
-$(ARTIFACTS_DIR)/docker/env2yaml/go.mod: data/logstash/env2yaml/go.mod
-$(ARTIFACTS_DIR)/docker/env2yaml/go.sum: data/logstash/env2yaml/go.sum
+$(ARTIFACTS_DIR)/docker/env2yaml/env2yaml: data/logstash/env2yaml/env2yaml
 
 $(ARTIFACTS_DIR)/docker/%:
 	cp -f $< $@
@@ -92,22 +90,22 @@ docker_paths:
 	mkdir -p $(ARTIFACTS_DIR)/docker/config
 	mkdir -p $(ARTIFACTS_DIR)/docker/env2yaml
 	mkdir -p $(ARTIFACTS_DIR)/docker/pipeline
+	cp -r data/logstash/env2yaml/classes $(ARTIFACTS_DIR)/docker/env2yaml/
+	cp -r data/logstash/env2yaml/lib $(ARTIFACTS_DIR)/docker/env2yaml/
 
 COPY_IRONBANK_FILES := $(ARTIFACTS_DIR)/ironbank/scripts/config/pipelines.yml $(ARTIFACTS_DIR)/ironbank/scripts/config/logstash.yml
 COPY_IRONBANK_FILES += $(ARTIFACTS_DIR)/ironbank/scripts/config/log4j2.file.properties $(ARTIFACTS_DIR)/ironbank/scripts/config/log4j2.properties
-COPY_IRONBANK_FILES += $(ARTIFACTS_DIR)/ironbank/scripts/pipeline/default.conf $(ARTIFACTS_DIR)/ironbank/scripts/bin/docker-entrypoint $(ARTIFACTS_DIR)/ironbank/scripts/go/src/env2yaml/env2yaml.go
-COPY_IRONBANK_FILES += $(ARTIFACTS_DIR)/ironbank/scripts/go/src/env2yaml/go.mod $(ARTIFACTS_DIR)/ironbank/scripts/go/src/env2yaml/go.sum $(ARTIFACTS_DIR)/ironbank/scripts/go/src/env2yaml/vendor/modules.txt $(ARTIFACTS_DIR)/ironbank/LICENSE $(ARTIFACTS_DIR)/ironbank/README.md
+COPY_IRONBANK_FILES += $(ARTIFACTS_DIR)/ironbank/scripts/pipeline/default.conf $(ARTIFACTS_DIR)/ironbank/scripts/bin/docker-entrypoint
+COPY_IRONBANK_FILES += $(ARTIFACTS_DIR)/ironbank/scripts/env2yaml/env2yaml
+COPY_IRONBANK_FILES += $(ARTIFACTS_DIR)/ironbank/LICENSE $(ARTIFACTS_DIR)/ironbank/README.md
 
 $(ARTIFACTS_DIR)/ironbank/scripts/config/pipelines.yml: data/logstash/config/pipelines.yml
 $(ARTIFACTS_DIR)/ironbank/scripts/config/logstash.yml: data/logstash/config/logstash-full.yml
 $(ARTIFACTS_DIR)/ironbank/scripts/config/log4j2.file.properties: data/logstash/config/log4j2.file.properties
 $(ARTIFACTS_DIR)/ironbank/scripts/config/log4j2.properties: data/logstash/config/log4j2.properties
 $(ARTIFACTS_DIR)/ironbank/scripts/pipeline/default.conf: data/logstash/pipeline/default.conf
 $(ARTIFACTS_DIR)/ironbank/scripts/bin/docker-entrypoint: data/logstash/bin/docker-entrypoint
-$(ARTIFACTS_DIR)/ironbank/scripts/go/src/env2yaml/env2yaml.go: data/logstash/env2yaml/env2yaml.go
-$(ARTIFACTS_DIR)/ironbank/scripts/go/src/env2yaml/go.mod: ironbank/go/src/env2yaml/go.mod
-$(ARTIFACTS_DIR)/ironbank/scripts/go/src/env2yaml/go.sum: ironbank/go/src/env2yaml/go.sum
-$(ARTIFACTS_DIR)/ironbank/scripts/go/src/env2yaml/vendor/modules.txt: ironbank/go/src/env2yaml/vendor/modules.txt
+$(ARTIFACTS_DIR)/ironbank/scripts/env2yaml/env2yaml: data/logstash/env2yaml/env2yaml
 $(ARTIFACTS_DIR)/ironbank/LICENSE: ironbank/LICENSE
 $(ARTIFACTS_DIR)/ironbank/README.md: ironbank/README.md
 
@@ -119,8 +117,10 @@ ironbank_docker_paths:
 	mkdir -p $(ARTIFACTS_DIR)/ironbank/scripts
 	mkdir -p $(ARTIFACTS_DIR)/ironbank/scripts/bin
 	mkdir -p $(ARTIFACTS_DIR)/ironbank/scripts/config
-	mkdir -p $(ARTIFACTS_DIR)/ironbank/scripts/go/src/env2yaml/vendor
+	mkdir -p $(ARTIFACTS_DIR)/ironbank/scripts/env2yaml
 	mkdir -p $(ARTIFACTS_DIR)/ironbank/scripts/pipeline
+	cp -r data/logstash/env2yaml/classes $(ARTIFACTS_DIR)/ironbank/scripts/env2yaml/
+	cp -r data/logstash/env2yaml/lib $(ARTIFACTS_DIR)/ironbank/scripts/env2yaml/
 
 public-dockerfiles: public-dockerfiles_oss public-dockerfiles_full public-dockerfiles_wolfi public-dockerfiles_observability-sre public-dockerfiles_ironbank
 

docker/data/logstash/env2yaml/build.gradle

@@ -0,0 +1,23 @@
+plugins {
+    id 'java'
+}
+
+compileJava {
+    destinationDirectory = file("${projectDir}/classes")
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.snakeyaml:snakeyaml-engine:2.9'
+}
+
+tasks.register('copyRuntimeLibs', Copy) {
+    from configurations.runtimeClasspath
+    into "${projectDir}/lib"
+ }
+
+compileJava.finalizedBy copyRuntimeLibs
+jar.enabled = false

docker/data/logstash/env2yaml/env2yaml

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# Execute the env2yaml java program. Ensure the snakeyaml-engine jar is in the classpath.
+
+exec /usr/share/logstash/jdk/bin/java \
+    -XX:+UseSerialGC \
+    -Xms32m \
+    -Xmx32m \
+    -cp "/usr/share/logstash/env2yaml/classes:/usr/share/logstash/env2yaml/lib/*" \
+    org.logstash.env2yaml.Env2Yaml "$@"
+
+