fix(ubuntu) prefer asdf tools over system tools in default PATHes (…

…#1061)

feat(path): revert order for asdf, first asdf version

provisioning/ubuntu-provision.sh

@@ -158,7 +158,7 @@ function install_asdf() {
 
   ## append to the system wide path variable, need to be seconded for docker in packer sources.pkr.hcl
   ## https://backreference.org/2010/02/20/using-different-delimiters-in-sed/index.html
-  sed --in-place --regexp-extended "s|^PATH=(.*)\"$|PATH=\1:${asdf_install_dir}/shims:${asdf_install_dir}/bin\"|" /etc/environment
+  sed --in-place --regexp-extended "s|^PATH=\"(.*)\"$|PATH=\"${asdf_install_dir}/shims:${asdf_install_dir}/bin:\1\"|" /etc/environment
 }
 
 ## Install the ASDF Plugin passed as argument ($1 is the name and $2 the URL)

sources.pkr.hcl

@@ -55,7 +55,7 @@ source "docker" "base" {
     "ENV LANGUAGE=${element(split(".", var.locale), 0)}:${element(split("_", var.locale), 0)}",
     "ENV LC_ALL=${var.locale}",
     "ENV AGENT_WORKDIR=/home/jenkins/agent",
-    "ENV PATH=$${PATH}:/usr/local/go/bin:/home/jenkins/.asdf/shims:/home/jenkins/.asdf/bin",
+    "ENV PATH=/usr/local/go/bin:/home/jenkins/.asdf/shims:/home/jenkins/.asdf/bin:$${PATH}",
     "WORKDIR /home/jenkins",
     "ENTRYPOINT [\"/usr/local/bin/jenkins-agent\"]",
     "USER jenkins",