a.sh

#!/bin/bash

cat <<EOF
net-setup has been done?

"yes" to continue
EOF
read confirmation
[ "$confirmation" == "yes" ] || exit

echo "=============== survey"

echo -n "root device (empty to sda): "
read rootdevice
[ "$rootdevice" = "" ] && rootdevice=sda
echo -n "distcc hosts (empty to disable): "
read distcc_hosts
if [ "$distcc_hosts" != "" ]; then
  echo -n "makeopts (empty to disable): "
  read distcc_makeopts
fi

myconfd_dir=`pwd`/myconfd
mkdir myconfd

echo -n "hostname: "
read myhostname
cat <<EOF > myconfd/hostname
hostname="${myhostname}"
EOF

cat <<'EOF' > myconfd/net
# /etc/conf.d/net

# config_eth0="dhcp"

# config_eth0="192.168.0.2 netmask 255.255.255.0 brd 192.168.0.255"
# routes_eth0="default via 192.168.0.1"
EOF
nano myconfd/net

echo -n "modules: "
read mymodules
cat <<EOF > myconfd/modules
modules="${mymodules}"
EOF

echo "=============== fdisk /dev/sda"
fdisk /dev/$rootdevice

echo "=============== mkfs"
mkfs.ext4 /dev/${rootdevice}1
mkswap /dev/${rootdevice}2

echo "=============== swapon & mount"
swapon /dev/${rootdevice}2
mount /dev/${rootdevice}1 /mnt/gentoo

echo "=============== downloading tarballs"
cd /mnt/gentoo
wget 'ftp://ftp.jaist.ac.jp/pub/Linux/Gentoo/releases/amd64/current-stage3/*.tar.bz2'
wget 'ftp://ftp.jaist.ac.jp/pub/Linux/Gentoo/snapshots/portage-latest.tar.bz2'

echo "=============== unpacking tarballs"
tar xjpf stage3-*.tar.bz2
tar xjf portage-latest.tar.bz2 -C /mnt/gentoo/usr

echo "=============== make.conf"
cat <<EOF >> etc/portage/make.conf

GENTOO_MIRRORS="ftp://ftp.iij.ad.jp/pub/linux/gentoo/ http://ftp.iij.ad.jp/pub/linux/gentoo/ http://ftp.jaist.ac.jp/pub/Linux/Gentoo/ ftp://ftp.jaist.ac.jp/pub/Linux/Gentoo/"
SYNC="rsync://rsync.jp.gentoo.org/gentoo-portage"
EOF

nano etc/portage/make.conf

echo "=============== fstab"
cat <<EOF > etc/fstab
/dev/${rootdevice}1   /            ext4    defaults,noatime     1 1
/dev/${rootdevice}2   none         swap    sw                   0 0
EOF

echo "=============== resolv"

cat <<EOF > etc/resolv.conf
nameserver 8.8.8.8
nameserver 8.8.4.4
EOF

echo "=============== hosts"

cat <<EOF > etc/hosts
127.0.0.1       ${myhostname} localhost
::1             ${myhostname} localhost
EOF

echo "=============== conf.d"
yes|cp -f ${myconfd_dir}/* /mnt/gentoo/etc/conf.d/

echo "============== prepare to chroot"
chmod 644 /mnt/gentoo/etc/conf.d/net

mount -t proc none /mnt/gentoo/proc
mount --rbind /dev /mnt/gentoo/dev
export DISTCC_HOSTS="${distcc_hosts}"
export DISTCC_MAKEOPTS="${distcc_makeopts}"

cat <<'EOF' > /mnt/gentoo/kickstart.sh
#!/bin/bash
echo "--------------- Landed O_o --------------"
env-update
source /etc/profile
export MAKEOPTS=-j`grep "^processor" /proc/cpuinfo|wc -l`

if [ "$DISTCC_HOSTS" != "" ]; then
  echo "=============== distcc"

  USE='-*' emerge --nodeps sys-devel/distcc
  export PATH="/usr/lib/ccache/bin:/usr/lib/distcc/bin:${PATH}"
  /usr/bin/distcc-config --set-hosts "$distcc_hosts"
  export MAKEOPTS="${DISTCC_MAKEOPTS}"
fi

export CONFIG_PROTECT_MASK="/etc"

function autoemerge {
  emerge --autounmask-write $1
  emerge $1
}

echo "============== timezone"
cp /usr/share/zoneinfo/Asia/Tokyo /etc/localtime

echo "============== flaggie"

autoemerge flaggie
flaggie vim +ruby +python +perl

echo "============== system tools"
emerge syslog-ng sudo vixie-cron dhcpcd less

rc-update add syslog-ng default
rc-update add vixie-cron default
rc-update add sshd default

echo "============== personal tools"
autoemerge zsh
autoemerge vim
autoemerge git
autoemerge tmux
autoemerge libyaml
autoemerge readline
autoemerge libxml2
autoemerge zlib

echo "============== useradd sorah"

useradd -m -G users,wheel,audio -s /bin/zsh sorah

echo "++++++++++++++ dive into sorah, I'll setup it ++++++++++++"
sudo -u sorah /userkickstart.sh
echo "-------------- back from sorah world ------------"

echo "============== gentoo-sources"

emerge gentoo-sources

echo "============== passwd root"
passwd root

echo "============== passwd sorah"
passwd sorah

echo "============== build the kernel"

cd /usr/src/linux
make localyesconfig
make menuconfig
make $MAKEOPTS && make $MAKEOPTS modules_install
mykernelversion=`make kernelversion`

cp arch/x86_64/boot/bzImage "/boot/kernel-${mykernelversion}"

echo "============== grub"

emerge grub

cat <<EOL > /boot/grub/grub.conf
default 0
timeout 30
#splashimage=(hd0,0)/boot/grub/splash.xpm.gz

title Gentoo linux-${mykernelversion}
root (hd0,0)
kernel /boot/kernel-${mykernelversion} root=/dev/sda1

title Gentoo linux-${mykernelversion} (rescue)
root (hd0,0)
kernel /boot/kernel-${mykernelversion} root=/dev/sda1 init=/bin/bb
EOL

grep -v rootfs /proc/mounts > /etc/mtab
grub-install --no-floppy /dev/sda

EOF

cat <<'EOF' > /mnt/gentoo/userkickstart.sh
#!/bin/bash
cd /home/sorah

echo "---- git/config"
mkdir -p git/ruby/foo/{bin,lib}
git clone https://github.com/sorah/config.git git/config
cd git/config
git submodule init
git submodule update
ln -s `pwd`/vim/dot.vim ~/.vim
ln -s `pwd`/vim/dot.vimrc ~/.vimrc
ln -s `pwd`/zsh/dot.zshrc ~/.zshrc
ln -s `pwd`/zsh/gentoo.zshrc_global_env ~/.zshrc_global_env
ln -s `pwd`/tmux/tmux.conf ~/.tmux.conf
ln -s `pwd`/misc/dot.irbrc ~/.irbrc
ln -s `pwd`/misc/dot.gemrc ~/.gemrc
cat <<'EOL' > /home/sorah/.tmux.reattacher
#!/bin/sh
exec $*
EOL
chmod +x /home/sorah/.tmux.reattacher

echo "---- rbenv"
cd /home/sorah
git clone https://github.com/sstephenson/rbenv.git .rbenv
mkdir -p .rbenv/plugins
git clone https://github.com/sstephenson/ruby-build.git .rbenv/plugins/ruby-build

export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"
rbenv install 1.9.3-p286
rbenv global 1.9.3-p286
gem install bundler

echo "---- ssh key"
echo "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA3Bb9RazVPPBOsJDDrzuwHXkdtopM9ySp0n9J2PCGaZzwWxsuK/c/8YICGvYbH49nzcmwsli8OzvOPDFry2isGxWhk8kc9uz2C771d/1ZisCVN8bn0PqFFb9zm2/iYaXNXjEyyZNhidknGbMEQPL9oH8tV7IRRlKlfe5c/WCO7QysKoM2L8CAPw4o6HSJcJR9F8GAH+t5N8GKZksE++MlZ2VBahfPx2xkkA6gzo5uxO37hkLzOwdkpZEorYcymjmUG6g7jJ9c0Y4bdmccKmVMNyZsJGLc8ScGtkXm2+KKkEj8k+48bHBR3B1DrObE4CRRJCBErXzuz5pnqPrgDHizYQ== sorah@americano.local" > /home/sorah/.ssh/authorized_keys
chmod 644 /home/sorah/.ssh/authorized_keys
EOF

chmod +x /mnt/gentoo/kickstart.sh
chmod +x /mnt/gentoo/userkickstart.sh

echo "+++++++++++++++ WOooo, time to fly into new Gentoo World ++++++++++++++"
chroot /mnt/gentoo /bin/bash /kickstart.sh

echo "... whew, all done."