Revert "support for multiple pre-baked kube/helm versions"

Dockerfile

@@ -6,7 +6,7 @@ FROM golang:1.12-alpine3.9 as builder
 RUN apk update
 RUN apk add dep git
 
-ENV GOOS=linux 
+ENV GOOS linux 
 ENV GOARCH=386 
 
 WORKDIR /go/src/github.com/ipedrazas/drone-helm
@@ -22,18 +22,30 @@ FROM alpine:3.9 as final
 MAINTAINER Ivan Pedrazas <ipedrazas@gmail.com>
 
 COPY --from=builder /go/src/github.com/ipedrazas/drone-helm/drone-helm /bin/
-COPY  *.sh /bin/
-COPY kubeconfig /root/.kube/kubeconfig
+
+# Helm version: can be passed at build time
+ARG VERSION
+ENV VERSION ${VERSION:-v2.14.1}
+ENV FILENAME helm-${VERSION}-linux-amd64.tar.gz
+
+ARG KUBECTL
+ENV KUBECTL ${KUBECTL:-v1.14.3}
 
 RUN set -ex \
-  && apk add --no-cache curl ca-certificates bash \
+  && apk add --no-cache curl ca-certificates \
+  && curl -o /tmp/${FILENAME} http://storage.googleapis.com/kubernetes-helm/${FILENAME} \
+  && curl -o /tmp/kubectl https://storage.googleapis.com/kubernetes-release/release/${KUBECTL}/bin/linux/amd64/kubectl \
   && curl -o /tmp/aws-iam-authenticator https://amazon-eks.s3-us-west-2.amazonaws.com/1.10.3/2018-07-26/bin/linux/amd64/aws-iam-authenticator \
+  && tar -zxvf /tmp/${FILENAME} -C /tmp \
+  && mv /tmp/linux-amd64/helm /bin/helm \
+  && chmod +x /tmp/kubectl \
+  && mv /tmp/kubectl /bin/kubectl \
   && chmod +x /tmp/aws-iam-authenticator \
-  && mv /tmp/aws-iam-authenticator /bin/aws-iam-authenticator 
-RUN /bin/setup-environments.sh
-RUN rm -rf /tmp/*
+  && mv /tmp/aws-iam-authenticator /bin/aws-iam-authenticator \
+  && rm -rf /tmp/*
 
 LABEL description="Kubectl and Helm."
 LABEL base="alpine"
+COPY kubeconfig /root/.kube/kubeconfig
 
-ENTRYPOINT [ "/bin/entrypoint.sh" ]
+ENTRYPOINT [ "/bin/drone-helm" ]

entrypoint.sh

@@ -1,28 +0,0 @@
-#!/bin/sh
-
-function error {
-    echo "$1"
-    exit 1
-}  
-                
-# Will symlink `helm` and `kubectl` binaries based on the `$HELM_VERSION` and
-# `$KUBECTL_VERSION` env variables into `$PREFIX/bin`, add `$PREFIX/bin` to 
-# the `$PATH` and delegate further execution to `/bin/drone-helm`
-# See `set-environments.sh` for baked in versions.
-
-HELM_VERSION="${HELM_VERSION:-v2.14.1}"
-KUBECTL_VERSION="${KUBECTL_VERSION:-v1.14.3}"
-
-mkdir -p ~/.local/bin
-ln -s -f ~/.local/lib/helm-${HELM_VERSION}/helm ~/.local/bin
-ln -s -f ~/.local/lib/kubectl-${KUBECTL_VERSION}/kubectl ~/.local/bin
-
-export PATH=~/.local/bin:$PATH
-
-echo "Using helm    Version: ${HELM_VERSION} installed into ~/.local/bin"
-echo "Using kubectl Version: ${KUBECTL_VERSION} installed into ~/.local/bin"
-
-helm version --client || error "Helm installation is not functional"
-kubectl version --client || error "Kubectl installation is not functional"
-
-/bin/drone-helm "$@"

plugin/plugin.go

@@ -12,9 +12,7 @@ import (
 	"text/template"
 )
 
-// use $PATH to locate the currently activated helm binary
-// do not harcode the full binary path
-var HELM_BIN = "helm"
+var HELM_BIN = "/bin/helm"
 var KUBECONFIG = "/root/.kube/kubeconfig"
 
 type (

setup-environments.sh

@@ -1,23 +0,0 @@
-#!/bin/bash
-
-# will populate ~/.local/lib/helm-$version/ with helm and tiller binaries
-helm_arch="linux-amd64"
-helm_versions=(v2.14.1 v2.13.1 v2.12.3)
-
-for version in "${helm_versions[@]}"
-do
-    curl http://storage.googleapis.com/kubernetes-helm/helm-${version}-${helm_arch}.tar.gz > /tmp/${version}.tar.gz
-    mkdir -p ~/.local/lib/helm-${version}/
-    tar -C ~/.local/lib/helm-${version}/ -xvf /tmp/${version}.tar.gz --strip 1
-done
-
-# will populate ~/.local/lib/kubectl-$version/ with kubectl binaries
-kubectl_arch="linux/amd64"
-kubectl_versions=(v1.14.3 v1.13.7 v1.12.9)
-
-for version in "${kubectl_versions[@]}"
-do
-    mkdir -p ~/.local/lib/kubectl-${version}/
-    curl https://storage.googleapis.com/kubernetes-release/release/${version}/bin/${kubectl_arch}/kubectl > ~/.local/lib/kubectl-${version}/kubectl
-    chmod +x ~/.local/lib/kubectl-${version}/kubectl
-done