From ba8fc9be8daa6ddf1c9e9b794f0f808ad64f187d Mon Sep 17 00:00:00 2001
From: Arnie <i@cechis.cz>
Date: Tue, 21 Aug 2018 17:53:23 +0200
Subject: [PATCH] Add docker relay installation script

---
 windows/install-docker-relay.sh | 148 ++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100755 windows/install-docker-relay.sh

diff --git a/windows/install-docker-relay.sh b/windows/install-docker-relay.sh
new file mode 100755
index 0000000..bf84d7d
--- /dev/null
+++ b/windows/install-docker-relay.sh
@@ -0,0 +1,148 @@
+#!/usr/bin/env bash
+
+installGo() {
+	echo "Fetching latest tags from github"
+	local tags=$(curl -s https://github.com/golang/go/tags | awk '/golang\/go\/releases\/tag/{print $7}' FS='["/]')
+
+	local latest=""
+
+	if [[ ${tags} = "" ]]; then
+		echo "Could not fetch the tags"
+		return 2
+	fi
+
+	echo "Fetched the latest tags, deciding which one to use..."
+
+	for tag in ${tags}[@]; do
+		tag=${tag//go}
+		if [[ ${tag} = *"rc"* ]]; then
+		  continue
+		elif [[ ${tag} = *"beta"* ]]; then
+		  continue
+		elif [[ ${tag} = *"alpha"* ]]; then
+		  continue
+		fi
+
+		echo "Found the latest tag: ${tag}"
+		latest=${tag}
+
+		break
+	done
+
+	if [[ "${latest}" = "" ]]; then
+		__err "Could not fetch the latest release"
+		return 2
+	fi
+
+	echo "Downloading golang ${latest}"
+	sudo curl -L --output "go.tar.gz" "https://storage.googleapis.com/golang/go${latest}.linux-amd64.tar.gz"
+
+	echo "Installing golang in /usr/local/go"
+	sudo tar -C /usr/local -xzf "go.tar.gz"
+
+	[[ ! -e /usr/local/go/bin ]] && echo "Did not install go properly" && return 137
+
+	grep -q /usr/local/go/bin ~/.bashrc
+
+	if [[ $? -ne 0 ]]; then
+		echo "Adding PATH export to .bashrc to include golang binary location"
+		echo "export PATH=\$PATH:/usr/local/go/bin" | tee -a ~/.bashrc
+	fi
+
+	echo "Removing the downloaded file"
+	sudo rm -f "go.tar.gz"
+
+	return 0
+}
+
+installRelay() {
+	echo "Fetching the docker relay from github"
+	/usr/local/go/bin/go get -d github.com/jstarks/npiperelay
+	[[ $? -ne 0 ]] && echo "Could not fetch the relay" && return 137
+
+	echo "Building the relay for windows"
+	export GOOS=windows
+	/usr/local/go/bin/go build -o /mnt/c/Users/${USER}/go/bin/npiperelay.exe github.com/jstarks/npiperelay
+	[[ $? -ne 0 ]] && echo "Could not build the binary" && return 137
+
+	echo "Linking the relay binary"
+	sudo ln -s /mnt/c/Users/${USER}/go/bin/npiperelay.exe /usr/local/bin/npiperelay.exe
+	[[ $? -ne 0 ]] && echo "Could not link the binary" && return 137
+
+	echo "Installing socat and docker.io"
+	sudo apt update
+	sudo apt install -y socat docker.io
+	[[ $? -ne 0 ]] && echo "Could not install the requirements" && return 137
+
+	return 0
+}
+
+addStartupScript() {
+	echo "Creating the docker relay startup script"
+	local relayLocation=~/.docker-relay
+
+	touch "${relayLocation}"
+	chmod +x "${relayLocation}"
+
+	cat << "EOF" | tee -a "${relayLocation}" > /dev/null
+#!/usr/bin/env bash
+
+isRelayRunning() {
+	[[ $(ps aux | grep -v grep | grep "socat UNIX-LISTEN:/var/run/docker.sock,fork,group=docker,umask=007 EXEC" | wc -l) -eq 0 ]] && return 0
+
+	return 1
+}
+
+isRelayRunning
+RUNNING=$?
+
+if [[ ${RUNNING} -eq 0 ]]; then
+	echo "Starting docker relay"
+	sudo ls > /dev/null
+	exec sudo socat UNIX-LISTEN:/var/run/docker.sock,fork,group=docker,umask=007 EXEC:"npiperelay.exe -ep -s //./pipe/docker_engine",nofork &
+fi
+
+RETRIES=20
+until [[ ${RUNNING} -eq 1 ]] || [[ ${RETRIES} -eq 0 ]]; do
+	isRelayRunning
+	RUNNING=$?
+	sleep 1
+	RETRIES=$((RETRIES-1))
+done
+
+if [[ ${RUNNING} -ne 1 ]] && [[ ${RETRIES} -eq 0 ]]; then
+	echo "Could not initialize the docker relay!"
+	echo "Exiting..."
+	exit 137
+fi
+
+exit 0
+EOF
+
+	echo "Aliasing docker to run the relay script first in ~/.bash_aliases"
+
+	cat << EOF | tee -a ~/.bash_aliases > /dev/null
+alias docker="${relayLocation} && docker"
+EOF
+
+	echo "Done, try running 'docker ps'"
+	return 0
+}
+
+createRelay() {
+	installGo
+	[[ $? -ne 0 ]] && echo "Could not install Go" && return 137
+
+	installRelay
+	[[ $? -ne 0 ]] && echo "Could not install relay" && return 137
+
+	addStartupScript
+	[[ $? -ne 0 ]] && echo "Could not add the startup script" && return 137
+
+	return 0
+}
+
+
+[[ ${1} = "" ]] && createRelay || "$@"
+
+exit $?