Use concourse/buildroot as base image

Author: Tobias Fuhrimann

Dockerfile

@@ -1,8 +1,4 @@
-FROM alpine:latest
-
-RUN apk update
-RUN apk upgrade
-RUN apk add --no-cache bash curl git jq
+FROM concourse/buildroot:git
 
 COPY scripts/ /opt/resource/
 RUN chmod +x /opt/resource/*

scripts/check

@@ -1,7 +1,7 @@
 #!/bin/bash
 # vim: set ft=sh
 
-set -e
+set -e -u
 
 exec 3>&1 # make stdout available as fd 3 for the result
 exec 1>&2 # redirect all output to stderr for logging

scripts/in

@@ -1,7 +1,7 @@
 #!/bin/bash
 # vim: set ft=sh
 
-set -e
+set -e -u
 
 exec 3>&1 # make stdout available as fd 3 for the result
 exec 1>&2 # redirect all output to stderr for logging

scripts/out

@@ -1,7 +1,7 @@
 #!/bin/bash
 # vim: set ft=sh
 
-set -e
+set -e -u
 
 exec 3>&1 # make stdout available as fd 3 for the result
 exec 1>&2 # redirect all output to stderr for logging