install.sh

#!/bin/sh
#
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#     88       d8  8b       d8   `8b  d8'`8b  d8'
#     88b,   ,a8"  "8a,   ,a8"    `8bd8'  `8bd8'
#     88`YbbdP"'    `"YbbdP"'       YP      YP
#     88
#     88    Zero-configuration Rack server
#           for Mac OS X -- http://pow.cx/
#
#
#     You're reading 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"
      [[ -z "$VERSION" ]] && VERSION=0.2.2


# 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/pow" --install-local


# Check to see whether we need root privileges.

      "$POW_BIN/pow" --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/pow" --install-system
        sudo launchctl load /Library/LaunchDaemons/cx.pow.firewall.plist 2>/dev/null
      fi


# Start (or restart) powd.

      echo "*** Starting the Pow server..."
      launchctl unload "$HOME/Library/LaunchAgents/cx.pow.powd.plist" 2>/dev/null || true
      launchctl load "$HOME/Library/LaunchAgents/cx.pow.powd.plist" 2>/dev/null

      echo "*** Installed"