OPSEXP-2797 Add TARGET_ARCH variable to add the possibility to bake m…

…ulti-arch base images

README.md

@@ -37,3 +37,17 @@ types of files in the right locations:
 
 * Alfresco Module Packages (AMPs) files in the [amps}(repository/amps/README.md) folder
 * Additional JAR files for the JRE in the [libs](repository/libs/README.md) folder
+
+## Architecture choice
+
+The image architecture defaults to the building system's architecture. To modify
+it, you need to adjust the `TARGET_ARCH` variable in the Bake file to a specific
+architecture, such as `linux/amd64`.
+
+```
+
+variable "TARGET_ARCH" {
+  default = "linux/amd64"
+}
+
+```

docker-bake.hcl

@@ -102,6 +102,10 @@ variable "ALFRESCO_REPO_USER_NAME" {
   default = "alfresco"
 }
 
+variable "TARGET_ARCH" {
+  default = "" # linux/amd64 linux/arm64
+}
+
 target "java_base" {
   context = "./java"
   dockerfile = "Dockerfile"
@@ -135,6 +139,7 @@ target "java_base" {
   }
   tags = ["${REGISTRY}/${REGISTRY_NAMESPACE}/alfresco-base-java:${JDIST}${JAVA_MAJOR}-${DISTRIB_NAME}${DISTRIB_MAJOR}"]
   output = ["type=cacheonly"]
+  platforms = TARGET_ARCH != "" ? ["${TARGET_ARCH}"] : []
 }
 
 variable "TOMCAT_MAJOR" {
@@ -178,6 +183,7 @@ target "tomcat_base" {
   }
   tags = ["${REGISTRY}/${REGISTRY_NAMESPACE}/alfresco-base-tomcat:tomcat${TOMCAT_MAJOR}-${JDIST}${JAVA_MAJOR}-${DISTRIB_NAME}${DISTRIB_MAJOR}"]
   output = ["type=cacheonly"]
+  platforms = TARGET_ARCH != "" ? ["${TARGET_ARCH}"] : []
 }
 
 target "repository" {