Merge pull request #1 from stakater-docker/git-cloner

git cloner

Dockerfile

@@ -0,0 +1,16 @@
+FROM debian:stretch
+
+RUN apt-get update && apt-get install -y git
+
+RUN mkdir /root/.ssh/ && \
+	mkdir /repository && \
+	touch /root/.ssh/known_hosts && \
+	echo "\nStrictHostKeyChecking no" >> /etc/ssh/ssh_config
+
+ADD init.sh /
+RUN chmod +x /init.sh
+
+# Clean up
+RUN apt-get autoremove -y && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+CMD ["/init.sh"]

Jenkinsfile

@@ -0,0 +1,6 @@
+#!/usr/bin/env groovy
+@Library('github.com/stakater/fabric8-pipeline-library@master') _
+
+pushDockerImage {
+    dockerRegistryURL = "docker.io"
+}

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Mark Hilton
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,2 +1,45 @@
 # git-cloner
-Dockerfile for git-cloner
+
+Docker image to clone requested github or bitbucket repository.
+
+## Use case
+
+Kubernetes deployments where init containers usually copy/move code from docker container into emptyDir volume to share between other deployment containers.
+
+In case of push to deploy instead of waiting for the Docker container to be build with a specific repository tag, use this universal container to specify deployment SSH key file authorized to clone requested repository code from specified branch or tag.
+
+## Environment variables
+
+### required
+`REPO_LINK` - github or bitbucket repository SSH clone link
+
+It is also required to mount a volume where the repository will be cloned from local file system into container `/repository` folder.
+
+In case of private repositories you also have to mount deployment SSH key authorized to clone code repository
+
+### optional
+`TAG` - clone specified tag
+
+`BRANCH` - clone specified branch (defaults to master)
+
+`REPO_KEY` - RSA key filename (defaults to id_rsa)
+
+if cloning using repository username/password instead SSH deployment key, please provide `REPO_LINK` without leading `https://`
+
+`REPO_USER` - authorized user to clone requested repository
+
+`REPO_PASS` - authorized user password to clone requested repository
+
+
+## Example run
+
+```
+docker run --rm -ti \
+    -v /path/to/clone/repository:/repository \
+    -v /path/to/authorized/id_rsa:/key:ro \
+    -e REPO_LINK=crunchgeek/git-clone
+    -e REPO_BRANCH=master
+    -e REPO_TAG=1.0.0
+    crunchgeek/git-clone
+```
+

init.sh

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+#!/bin/bash
+
+if [ -z "$REPO_LINK" ]; then 
+	echo -e "\033[1;91mERROR:\033[0m REPO_LINK env variable is required"
+	exit 1
+fi
+
+if [ -z "$REPO_BRANCH" ]; then 
+	export REPO_BRANCH=master
+fi
+
+if [ -z "$REPO_KEY" ]; then 
+	export REPO_KEY=id_rsa
+fi
+
+echo "repository : $REPO_LINK"
+echo "branch     : $REPO_BRANCH"
+# check if credentials files exist
+if [[ -f "/key/$REPO_KEY" ]] ; then 
+	echo "key file   : $REPO_KEY"
+	cp /key/$REPO_KEY /root/.ssh/id_rsa
+	chmod 600 /root/.ssh/id_rsa
+	ssh-keyscan -H gitlab.com >> /root/.ssh/known_hosts
+fi
+
+if [ ! -z "$REPO_USER" ] && [ ! -z "$REPO_PASS" ]; then 
+	# clone with repository username & password
+	echo "credentials: username and password"
+	git clone -b $REPO_BRANCH https://$REPO_USER:$REPO_PASS@$REPO_LINK /repository
+elif [[ ! -f "/root/.ssh/id_rsa" ]] ; then 
+	echo -e "\033[1;91mERROR:\033[0m REPO_USER, REPO_PASS env variables or SSH deployment key missing"
+	exit 1
+else
+	# clone public repository or using ssh deployment key
+	echo "credentials: RSA key"
+	git clone -b $REPO_BRANCH $REPO_LINK /repository
+fi
+
+if [ ! -z "$REPO_TAG" ]; then 
+	cd /repository && \
+	echo "checking out repository tag: $REPO_TAG"
+	git checkout tags/$REPO_TAG
+fi
+