complete overhaul of webtry work partition between jail and host

experimental/webtry/setup/webtry_setup.sh

 #!/bin/bash
 #
 # Script to setup a GCE instance to run the webtry server.
 # For full instructions see the README file.
 sudo apt-get install schroot debootstrap monit squid3
-sudo apt-get install g++ libfreetype6 libfreetype6-dev libpng12-0 libpng12-dev libglu1-mesa-dev mesa-common-dev freeglut3-dev libgif-dev libfontconfig libfontconfig-dev
+
+# although aufs is being replaced by overlayfs, it's not clear
+# to me if overlayfs is completely supported by schroot yet.
+sudo apt-get install aufs-tools
 
 echo "Adding the webtry user account"
 sudo adduser webtry
 
-sudo cp continue_install /home/webtry/continue_install
-sudo chmod 766 /home/webtry/continue_install
-sudo chown webtry:webtry /home/webtry/continue_install
-sudo su webtry -c /home/webtry/continue_install
+sudo mkdir /home/webtry/cache
+sudo mkdir /home/webtry/cache/src
+sudo mkdir /home/webtry/inout
+sudo chmod 777 /home/webtry/inout
+sudo chmod 777 /home/webtry/cache
+sudo chmod 777 /home/webtry/cache/src
 
-sudo mkdir -p /srv/chroot/webtry
-sudo cp /home/webtry/skia/experimental/webtry/sys/webtry_schroot /etc/schroot/chroot.d/webtry
+sudo cp ../sys/webtry_schroot /etc/schroot/chroot.d/webtry
 
-sudo mkdir /srv/chroot/webtry/etc
-sudo mkdir /srv/chroot/webtry/bin
-sudo cp /bin/sh /srv/chroot/webtry/bin/sh
+CHROOT_JAIL=/srv/chroot/webtry_gyp
+# Build the chroot environment
+if [ ! -d ${CHROOT_JAIL} ]; then
+        sudo mkdir -p ${CHROOT_JAIL}
 
-# Copy all the dependent libraries into the schroot.
-sudo cp --parents `ldd /home/webtry/skia/out/Debug/webtry | cut -d " " -f 3` /srv/chroot/webtry
-sudo cp --parents `ldd /bin/sh | cut -d " " -f 3` /srv/chroot/webtry
+        sudo debootstrap --variant=minbase wheezy ${CHROOT_JAIL}
+        sudo cp setup_jail.sh ${CHROOT_JAIL}/bin
+        sudo chmod 755 ${CHROOT_JAIL}/bin/setup_jail.sh
+        sudo chroot ${CHROOT_JAIL} /bin/setup_jail.sh
+        sudo echo "none /dev/shm tmpfs rw,nosuid,nodev,noexec 0 0" >> ${CHROOT_JAIL}/etc/fstab
+fi
 
-sudo cp /home/webtry/skia/experimental/webtry/sys/webtry_init /etc/init.d/webtry
-sudo cp /home/webtry/skia/experimental/webtry/sys/webtry_monit /etc/monit/conf.d/webtry
-sudo cp /home/webtry/skia/experimental/webtry/sys/webtry_squid /etc/squid3/squid.conf
+# the continue_install script will fetch the latest versions of 
+# skia and depot_tools.  We split up the installation process into 
+# two pieces like this so that the continue_install script can
+# be run independently of this one to fetch and build the latest skia.
+
+./continue_install.sh
+
+sudo cp ../sys/webtry_init /etc/init.d/webtry
+sudo cp ../sys/webtry_monit /etc/monit/conf.d/webtry
+sudo cp ../sys/webtry_squid /etc/squid3/squid.conf
 sudo chmod 744 /etc/init.d/webtry
 
 # Confirm that monit is happy.
+
 sudo monit -t
 sudo monit reload