# Copyright 2015 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.

set -e

# Download Plan 9
if ! sha1sum -c plan9-gce.iso.sha1; then
  curl --fail -O http://9legacy.org/download/go/2016-10-17/plan9-gce.iso.bz2
  bunzip2 plan9-gce.iso.bz2
  sha1sum -c plan9-gce.iso.sha1
fi

# Initialize disk image.
rm -f disk.raw
qemu-img create -f raw disk.raw 10G

# Run the installer to create the disk image.
expect <<EOF
spawn qemu-system-i386 -machine accel=kvm -nographic -net user -net nic,model=virtio -m 1024 -vga none -drive if=none,id=hd,file=disk.raw -device virtio-scsi-pci,id=scsi -device scsi-hd,drive=hd -cdrom plan9-gce.iso -boot d

expect -exact "Selection:"
send "1\n"

expect -exact "Plan 9"
sleep 5

# Need to wait for the kernel to boot.
expect -timeout 600 -exact "use DMA for ide drives\[yes\]:"
send "\n"

expect -exact "mouseport is (ps2, ps2intellimouse, 0, 1, 2)\[ps2\]:"
send "ps2intellimouse\n"

expect -exact "vgasize \[640x480x8\]:"
send "1280x1024x32\n"

expect -exact "monitor is \[xga\]:"
send "vesa\n"

expect -exact "% "
send "inst/textonly\n"

expect -exact "Task to do \[configfs\]:"
send "\n"

expect -exact "File system (fossil, fossil+venti)\[fossil\]:"
send "\n"

expect -exact "Task to do \[partdisk\]:"
send "\n"

expect -exact "Disk to partition (sd00, sdD0)\[no default\]:"
send "sd00\n"

expect -exact "Install mbr \(y, n\)\[no default\]:"
send "y\n"

expect -exact ">>> "
send "w\n"

expect -exact ">>> "
send "q\n"

expect -exact "Task to do \[prepdisk\]:"
send "\n"

expect -exact "Plan 9 partition to subdivide \(/dev/sd00/plan9\)\[/dev/sd00/plan9\]:"
send "\n"

expect -exact ">>> "
send "w\n"

expect -exact ">>> "
send "q\n"

expect -exact "Task to do \[fmtfossil\]:"
send "\n"

expect -exact "Fossil partition to format \(/dev/sd00/fossil\)\[/dev/sd00/fossil\]:"
send "\n"

expect -exact "Task to do \[mountfs\]:"
send "\n"

expect -exact "Fossil partition \(/dev/sd00/fossil\)\[/dev/sd00/fossil\]:"
send "\n"

expect -exact "Task to do \[configdist\]:"
send "\n"

expect -exact "Distribution is from \(local, net\)\[local\]:"
send "\n"

expect -exact "Task to do \[mountdist\]:"
send "\n"

expect -exact "Distribution disk \[no default\]:"
send "/dev/sdD0/data\n"

expect -exact "Location of archives \[browse\]:"
send "/\n"

expect -exact "Task to do \[copydist\]:"
send "\n"

# Need to wait for the copy to finish.
expect -timeout 600 -exact "Task to do \[bootsetup\]:"
send "\n"

expect -exact "Enable boot method (floppy, plan9, win9x, winnt)\[no default\]:"
send "plan9\n"

expect -exact "Install the Plan 9 master boot record (y, n)\[no default\]:"
send "y\n"

expect -exact "Task to do \[finish\]:"
send "\n"

expect -exact "Feel free to turn off your computer."
exit
EOF

# Configuration.
expect <<EOF
spawn qemu-system-i386 -machine accel=kvm -nographic -net user -net nic,model=virtio -m 1024 -vga none -drive if=none,id=hd,file=disk.raw -device virtio-scsi-pci,id=scsi -device scsi-hd,drive=hd -cdrom plan9-gce.iso -boot c

expect -exact "Plan 9"
sleep 5

# Need to wait for the kernel to boot.
expect -timeout 600 -exact "term% "
send "\n"

expect -exact "term% "
send "9fat:\n"

expect -exact "term% "
send "sed /^debugboot'='/d /n/9fat/plan9.ini >/tmp/plan9.ini\n"

expect -exact "term% "
send "mv /tmp/plan9.ini /n/9fat/plan9.ini\n"

expect -exact "term% "
send "sed s/9pcf/9pccpuf/ /n/9fat/plan9.ini >/tmp/plan9.ini\n"

expect -exact "term% "
send "mv /tmp/plan9.ini /n/9fat/plan9.ini\n"

expect -exact "term% "
send "cp /386/9pccpuf /n/9fat\n"

expect -exact "term% "
send "sed s/sd00/sd01/ /n/9fat/plan9.ini >/tmp/plan9.ini\n"

expect -exact "term% "
send "mv /tmp/plan9.ini /n/9fat/plan9.ini\n"

expect -exact "term% "
send "unmount /n/9fat\n"

expect -exact "term% "
send "fossil/conf /dev/sd00/fossil | sed s/sd00/sd01/ >/tmp/fossil.conf\n"

expect -exact "term% "
send "fossil/conf -w /dev/sd00/fossil /tmp/fossil.conf\n"

expect -exact "term% "
send "rm /tmp/fossil.conf\n"

expect -exact "term% "
send "mkdir /cfg/helix\n"

expect -exact "term% "
send "dircp /cfg/example /cfg/helix\n"

expect -exact "term% "
send "echo ip/ipconfig -o mtu >>/cfg/helix/cpurc\n"

expect -exact "term% "
send "echo ndb/dns -r >>/cfg/helix/cpurc\n"

expect -exact "term% "
send "echo echo remove 10.0.0.0 /104 10.0.0.0 '>'/net/iproute >>/cfg/helix/cpurc\n"

expect -exact "term% "
send "echo ramfs -su >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo mount -c /srv/ramfs /tmp >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo aux/randfs -m /dev >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo kill timesync '|' rc >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo echo downloading git >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo hget http://9legacy.org/9legacy/tools/git '>'/usr/glenda/bin/rc/git >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo chmod +x /usr/glenda/bin/rc/git >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo echo starting buildlet script >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo 'hget \`{hget -r '''Metadata-Flavor: Google''' http://metadata.google.internal/computeMetadata/v1/instance/attributes/buildlet-binary-url} >/tmp/buildlet' >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo chmod +x /tmp/buildlet >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo exec /tmp/buildlet >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "echo fshalt >>/cfg/helix/cpustart\n"

expect -exact "term% "
send "sed /exec/d \\\$home/lib/profile >\\\$home/lib/profile.new && mv \\\$home/lib/profile.new \\\$home/lib/profile\n"

expect -exact "term% "
send "auth/wrkey\n"

expect -exact "authid: "
send "glenda\n"

expect -exact "authdom: "
send "go\n"

expect -exact "auth password: "
send "glenda123\n"

expect -exact "secstore password: "
send "glenda123\n"

expect -exact "term% "
send "fshalt\n"

expect -exact "done halting"
exit
EOF

echo

# Create Compute Engine disk image.
echo "Archiving disk.raw... (this may take a while)"
tar -Szcf plan9-386-gce.tar.gz disk.raw

echo "Done. GCE image is plan9-386-gce.tar.gz."