postinst

#!/bin/bash

echo "Resetting permissions ..."

chmod -R g+w /home/ubuntu/workspace
#don't do this, eats space! chown -R ubuntu:ubuntu /home/ubuntu > /dev/null 2>&1
chown -R ubuntu:ubuntu /var/c9sdk/plugins/c9.ide.cs50* > /dev/null 2>&1
chown -R ubuntu:ubuntu /var/c9sdk/configs/ > /dev/null 2>&1

chown -R ubuntu:ubuntu /home/ubuntu/.local/ 2>&1
chown -R ubuntu:ubuntu /home/ubuntu/.cs50/ 2>&1
chmod 644 /etc/apt/sources.list.d/cs50.list > /dev/null 2>&1 || true
chmod 644 /home/ubuntu/workspace/.eslintrc 2>&1 || true
chmod 644 /home/ubuntu/.cs50/py_modules/pylint50.py || true

chmod 644 /etc/bash_completion.d/make

# remove dropbox functions
sed -i 's:source /home/ubuntu/.dropbox50::g' ~/.bashrc

# add courses group and cs50 user
groupadd -r courses > /dev/null 2>&1 || true
adduser --gecos "CS50,,,," --ingroup courses --disabled-login --system cs50 > /dev/null 2>&1 || true

# set permissions and ownership of /home/cs50 files
chown -R cs50.courses /home/cs50

# executables, scripts, and directories
chmod -R 755 /home/cs50 /home/ubuntu/.cs50/bin

# non-executables
find /home/cs50/ -type f -name *.* -exec chmod 644 {} \;

# use clang 3.8 by default
update-alternatives --install /usr/bin/clang clang /usr/bin/clang-3.8 380 \
    --slave /usr/bin/clang++ clang++ /usr/bin/clang++-3.8 \
    --slave /usr/bin/clang-check clang-check /usr/bin/clang-check-3.8 \
    --slave /usr/bin/clang-query clang-query /usr/bin/clang-query-3.8 \
    --slave /usr/bin/clang-rename clang-rename /usr/bin/clang-rename-3.8

# otherwise lsof doesn't see server
chown ubuntu:courses /home/cs50/pset6/server

# prep instance's index page
if [ -f /var/www/html/index.html ]; then
    rm -f /var/www/html/index.html
fi

# remove apache test file from workspace
if grep -qs '^Success$' /var/www/html/file; then
    rm -f /var/www/html/file
fi

# add ide50 source file to apache's envvars
if ! grep -qs 'ide50.sh' /etc/apache2/envvars; then
    sed -i 's-cloud9.sh-cloud9.sh\n. /etc/profile.d/ide50.sh-' /etc/apache2/envvars
fi

# make sure ubuntu can write to phpmyadmin's upload directory
chown ubuntu /var/lib/phpmyadmin/tmp

# increase phpmyadmin cookie timeout to one day
if ! grep -qs 'LoginCookieValidity' /etc/phpmyadmin/config.inc.php; then
    sudo sed -i '$a$cfg["LoginCookieValidity"] = 86400;'  /etc/phpmyadmin/config.inc.php
fi

# change phpmyadmin auth_type from cookie to http
sudo sed -i "s:\('auth_type'.*\)'cookie':\1'http':" /etc/phpmyadmin/config.inc.php

# Change user running apache from www-data to ubuntu
sudo sed -i "s/APACHE_RUN_USER=www-data/APACHE_RUN_USER=ubuntu/" /etc/apache2/envvars
sudo sed -i "s/APACHE_RUN_GROUP=www-data/APACHE_RUN_GROUP=ubuntu/" /etc/apache2/envvars

# remove ubuntu from group www-data
sudo gpasswd -d ubuntu www-data 2> /dev/null

# enable cs50 PHP config
if [ ! -h /etc/php5/apache2/conf.d/50-cs50.ini ]; then
    ln -s /etc/php5/mods-available/cs50.ini /etc/php5/apache2/conf.d/50-cs50.ini

    # attempt to reload apache
    /usr/bin/apache50 reload > /dev/null 2>&1
fi

# in interactive shells, prevent manual flow control so Ctrl-S doesn't pause
if ! grep -qs 'stty -ixon' /home/ubuntu/.bashrc; then
    echo "stty -ixon" >> /home/ubuntu/.bashrc
fi

# allow `cd` to bring user back to workspace (`cd ~` to homedir)
if ! grep -qs "alias cd" /home/ubuntu/.bashrc; then
    echo 'alias cd="HOME=~/workspace cd"' >> /home/ubuntu/.bashrc
fi

if [ -f /home/ubuntu/.cs50/prompt ] && ! grep -qs 'prompt' /home/ubuntu/.bashrc; then
    echo "source /home/ubuntu/.cs50/prompt" >> /home/ubuntu/.bashrc
fi

# update path in existing .bashrc files
sed -i "s#\(/home/ubuntu/\).prompt50#\1.cs50/prompt#" /home/ubuntu/.bashrc

# remove old source file if it exists
if [ -f /etc/profile.d/app.sh ]; then
    rm -f /etc/profile.d/app.sh
fi

# create a password50 file, if it doesn't exist
sudo -Eu ubuntu /usr/bin/password50 > /dev/null 2>&1

# add mysql username and password to env
sudo cat > /etc/profile.d/mysql.sh <<EOF
export MYSQL_USERNAME="$(username50)"
export MYSQL_PASSWORD="$(password50)"
export MYSQL_HOSTNAME="localhost"
EOF

# add mysql username and password env vars to apache's environment
if ! grep -qs 'mysql.sh' /etc/apache2/envvars; then
    sed -i 's-ide50.sh-ide50.sh\n. /etc/profile.d/mysql.sh-' /etc/apache2/envvars
fi


####################
# the remaining requires a recent update50 and some env variables must exist
if [ -z "$C9_USER" ]; then
    echo
    echo "Please run update50 again to complete the installation!"
    exit 0
fi

# set up MySQL
echo "Setting up MySQL ..."
/usr/bin/mysql50 install > /dev/null 2>&1

# start MySQL by default
/usr/bin/mysql50 start > /dev/null 2>&1

if [ ${IDE_OFFLINE+x} ]; then
    # add offline source file to apache's envvars
    if ! grep -qs 'offline.sh' /etc/apache2/envvars; then
        sed -i 's-ide50.sh-ide50.sh\n. /etc/profile.d/offline.sh-' /etc/apache2/envvars
    fi

    # add c9 alias to profile
    if ! grep -qs 'alias c9' /etc/profile.d/offline.sh; then
        echo -e "\nalias c9=/var/c9sdk/bin/c9" >> /etc/profile.d/offline.sh
    fi

    # remove old config file
    rm -rf /var/c9sdk/configs/client-workspace-cs50.js

    # offline only: update c9sdk and plugins
    echo "Updating Cloud9 SDK ..."
    pushd /var/c9sdk > /dev/null 2>&1

    # https://github.com/c9/core/issues/432
    npm install -g npm@4.6.1
    git reset --hard
    sudo -Eu ubuntu scripts/install-sdk.sh > /dev/null 2>&1
    popd > /dev/null 2>&1
else
    # plugin updates aren't necessary for online IDEs; remove files
    rm -rf /var/c9sdk/plugins/c9.ide.cs50* > /dev/null 2>&1
    rmdir -p /var/c9sdk/plugins/ > /dev/null 2>&1

    rm -rf /var/c9sdk/configs/client-workspace-cs50.js > /dev/null 2>&1
    rm -rf /var/c9sdk/configs/ide/workspace-cs50.js > /dev/null 2>&1
    rmdir -p /var/c9sdk/configs/ide > /dev/null 2>&1
fi

exit 0