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#!/bin/sh
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# G Zero-configuration Rack server for Mac OS X
# http://pow.cx/
#
# This is the installation script for Pow.
# See the full annotated source: http://pow.cx/docs/
#
# Install Pow by running this command:
# curl get.pow.cx | sh
#
# Uninstall Pow: :'(
# curl get.pow.cx/uninstall.sh | sh
# Set up the environment. Respect $VERSION if it's set.
set -e
POW_ROOT="$HOME/Library/Application Support/Pow"
POW_BIN="$POW_ROOT/Current/bin/pow"
[[ -z "$VERSION" ]] && VERSION=0.3.2
# Fail fast if we're not on OS X >= 10.6.0.
if [ "$(uname -s)" != "Darwin" ]; then
echo "Sorry, Pow requires Mac OS X to run." >&2
exit 1
elif [ "$(expr "$(sw_vers -productVersion | cut -f 2 -d .)" \>= 6)" = 0 ]; then
echo "Pow requires Mac OS X 10.6 or later." >&2
exit 1
fi
echo "*** Installing Pow $VERSION..."
# Create the Pow directory structure if it doesn't already exist.
mkdir -p "$POW_ROOT/Hosts" "$POW_ROOT/Versions"
# If the requested version of Pow is already installed, remove it first.
cd "$POW_ROOT/Versions"
rm -rf "$POW_ROOT/Versions/$VERSION"
# Download the requested version of Pow and unpack it.
curl -s http://get.pow.cx/versions/$VERSION.tar.gz | tar xzf -
# Update the Current symlink to point to the new version.
cd "$POW_ROOT"
rm -f Current
ln -s Versions/$VERSION Current
# Create the ~/.pow symlink if it doesn't exist.
cd "$HOME"
[[ -a .pow ]] || ln -s "$POW_ROOT/Hosts" .pow
# Install local configuration files.
echo "*** Installing local configuration files..."
"$POW_BIN" --install-local
# Check to see whether we need root privileges.
"$POW_BIN" --install-system --dry-run >/dev/null && NEEDS_ROOT=0 || NEEDS_ROOT=1
# Install system configuration files, if necessary. (Avoid sudo otherwise.)
if [ $NEEDS_ROOT -eq 1 ]; then
echo "*** Installing system configuration files as root..."
sudo "$POW_BIN" --install-system
sudo launchctl load -Fw /Library/LaunchDaemons/cx.pow.firewall.plist 2>/dev/null
fi
# Start (or restart) Pow.
echo "*** Starting the Pow server..."
launchctl unload "$HOME/Library/LaunchAgents/cx.pow.powd.plist" 2>/dev/null || true
launchctl load -Fw "$HOME/Library/LaunchAgents/cx.pow.powd.plist" 2>/dev/null
# Show a message about where to go for help.
function print_troubleshooting_instructions() {
echo
echo "For troubleshooting instructions, please see the Pow wiki:"
echo "https://github.com/37signals/pow/wiki/Troubleshooting"
echo
echo "To uninstall Pow, \`curl get.pow.cx/uninstall.sh | sh\`"
}
# Check to see if the server is running properly.
# If this version of Pow supports the --print-config option,
# source the configuration and use it to run a self-test.
CONFIG=$("$POW_BIN" --print-config 2>/dev/null || true)
if [[ -n "$CONFIG" ]]; then
eval "$CONFIG"
echo "*** Performing self-test..."
# Check to see if the server is running at all.
function check_status() {
sleep 1
curl -sH host:pow "localhost:$POW_HTTP_PORT/status.json" | grep -c "$VERSION" >/dev/null
}
# Attempt to connect to Pow via each configured domain. If a
# domain is inaccessible, try to force a reload of OS X's
# network configuration.
function check_domains() {
for domain in ${POW_DOMAINS//,/$IFS}; do
echo | nc "${domain}." "$POW_DST_PORT" 2>/dev/null || return 1
done
}
# Use networksetup(8) to create a temporary network location,
# switch to it, switch back to the original location, then
# delete the temporary location. This forces reloading of the
# system network configuration.
function reload_network_configuration() {
echo "*** Reloading system network configuration..."
local location=$(networksetup -getcurrentlocation)
networksetup -createlocation "pow$$" >/dev/null 2>&1
networksetup -switchtolocation "pow$$" >/dev/null 2>&1
networksetup -switchtolocation "$location" >/dev/null 2>&1
networksetup -deletelocation "pow$$" >/dev/null 2>&1
}
# Try twice to connect to Pow. Bail if it doesn't work.
check_status || check_status || {
echo "!!! Couldn't find a running Pow server on port $POW_HTTP_PORT"
print_troubleshooting_instructions
exit 1
}
# Try resolving and connecting to each configured domain. If
# it doesn't work, reload the network configuration and try
# again. Bail if it fails the second time.
check_domains || {
{ reload_network_configuration && check_domains; } || {
echo "!!! Couldn't resolve configured domains ($POW_DOMAINS)"
print_troubleshooting_instructions
exit 1
}
}
fi
# All done!
echo "*** Installed"
print_troubleshooting_instructions
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