Packer wrapper for spinnaker rosco multi region baking

packer

#!/usr/bin/env bash


#This shell script goes in /usr/local/bin/packer
#
#The real packer binary is at /opt/packer
#
#The script looks for region in the params and then adds that to the end of aws-ebs.json and calls it with the real packer /opt/packer
#
#So Rosco goes:
#
#packer build -color=false -var aws_region=us-west-2 -var aws_ssh_username=ubuntu -var aws_instance_type=t2.micro -var aws_source_ami=ami-d732f0b7 -var aws_target_ami=nginx-all-20160721161956-ubuntu -var aws_associate_public_ip_address=true -var package_type=deb -var packages=nginx -var configDir=/opt/rosco/config/packer /opt/rosco/config/packer/aws-ebs.json
#
#Fake packer intercepts it because it is on the PATH and then calls:
#
#/opt/packer build -color=false -var aws_region=us-west-2 -var aws_ssh_username=ubuntu -var aws_instance_type=t2.micro -var aws_source_ami=ami-d732f0b7 -var aws_target_ami=nginx-all-20160721161956-ubuntu -var aws_associate_public_ip_address=true -var package_type=deb -var packages=nginx -var configDir=/opt/rosco/config/packer /opt/rosco/config/packer/aws-ebs-west-2.json
#
#aws-ebs-west-2.json and aws-ebs-east-1.json have their specific vpc and subnet info.

ARGS="$@"
REGION=$4
IFS='=' read -ra REG <<< "$REGION"
NEWCONFIG="aws-ebs-${REG[1]}.json"
OLDCMD="$ARGS"
ARGS="${OLDCMD/aws-ebs.json/$NEWCONFIG}"

/opt/packer $ARGS

does this work even find image look up on pipelines ? if I have a pipeline and say find image in another pipeline ?