#!/usr/bin/env sh

# Validate environment variables

# Create ssh host key if not present
if [ ! -f /etc/ssh/ssh_host_rsa_key ]; then
  ssh-keygen -A
fi

# Setup gitolite at volume /var/lib/git
if [ ! -f "/var/lib/git/.ssh/authorized_keys" ]; then
  # Configure gitolite
  echo "$SSH_KEY" > "/tmp/$SSH_KEY_NAME.pub"
  su git -c "gitolite setup -pk \"/tmp/$SSH_KEY_NAME.pub\""
  rm "/tmp/$SSH_KEY_NAME.pub"
fi

# Init container
if [ ! -f /etc/nginx/conf.d/cgit.conf ]; then
  # enable random git password
  GIT_PASSWORD=$(date +%s | sha256sum | base64 | head -c 32)
  echo "git:$GIT_PASSWORD" | chpasswd

  # add web user (nginx) to gitolite group (git)
  adduser nginx git

  ## Config cgit interface
  cat > /etc/cgitrc <<- EOF
# Use a virtual-root
virtual-root=/

# Enable caching of up to 1000 output entries
cache-size=1000

# Specify the css url
css=/cgit.css

# Enable configuration from external management, for example: gitolite
enable-git-config=1

# Show extra links for each repository on the index page
enable-index-links=1

# Enable ASCII art commit history graph on the log pages
enable-commit-graph=1

# Show number of affected files per commit on the log pages
enable-log-filecount=1

# Show number of added/removed lines per commit on the log pages
enable-log-linecount=1

# Use a custom logo
logo=/cgit.png

# Enable statistics per week, month and quarter
max-stats=quarter

##
## List of common mimetypes
##

mimetype.gif=image/gif
mimetype.html=text/html
mimetype.jpg=image/jpeg
mimetype.jpeg=image/jpeg
mimetype.md=text/markdown
mimetype.mng=video/x-mng
mimetype.ora=image/openraster
mimetype.pam=image/x-portable-arbitrarymap
mimetype.pbm=image/x-portable-bitmap
mimetype.pdf=application/pdf
mimetype.pgm=image/x-portable-graymap
mimetype.png=image/png
mimetype.svg=image/svg+xml
mimetype.svgz=image/svg+xml
mimetype.tga=image/x-tga
mimetype.tif=image/tiff
mimetype.tiff=image/tiff
mimetype.webp=image/webp
mimetype.xbm=image/x-xbitmap
mimetype.xcf=image/x-xcf
mimetype.xpm=image/x-xpixmap

# Enable syntax highlighting and about formatting
source-filter=/usr/lib/cgit/filters/syntax-highlighting.py
about-filter=/usr/lib/cgit/filters/about-formatting.sh

##
## List of common readmes
##
readme=:README.md
readme=:readme.md
readme=:README.mkd
readme=:readme.mkd
readme=:README.rst
readme=:readme.rst
readme=:README.html
readme=:readme.html
readme=:README.htm
readme=:readme.htm
readme=:README.txt
readme=:readme.txt
readme=:README
readme=:readme
readme=:INSTALL.md
readme=:install.md
readme=:INSTALL.mkd
readme=:install.mkd
readme=:INSTALL.rst
readme=:install.rst
readme=:INSTALL.html
readme=:install.html
readme=:INSTALL.htm
readme=:install.htm
readme=:INSTALL.txt
readme=:install.txt
readme=:INSTALL
readme=:install

# Direct cgit to repository location managed by gitolite
remove-suffix=0
project-list=/var/lib/git/projects.list
section-from-path=3
scan-path=/var/lib/git/repositories
EOF

  # Append clone-prefix
  if [ ! -z "$CGIT_CLONE_PREFIX" ]; then
      echo "# Specify some default clone prefixes" >> /etc/cgitrc
      echo "clone-prefix=$CGIT_CLONE_PREFIX" >> /etc/cgitrc
  fi

  if [ ! -z "$CGIT_ROOT_TITLE" ]; then
      echo "# Set the title and heading of the repository index page" >> /etc/cgitrc
      echo "root-title=$CGIT_ROOT_TITLE" >> /etc/cgitrc
  fi

  if [ ! -z "$CGIT_DESC" ]; then
      echo "# Set description repository" >> /etc/cgitrc
      echo "root-desc=$CGIT_DESC" >> /etc/cgitrc
  fi

  if [ ! -z "$CGIT_SNAPSHOT" ]; then
      echo "# Allow download of tar.gz, tar.bz2, and tar.xz formats" >> /etc/cgitrc
      echo "snapshots=$CGIT_SNAPSHOT" >> /etc/cgitrc
  fi

  # Using highlight syntax
  #sed -i.bak \
  #  -e "s#exec highlight --force -f -I -X -S #\#&#g" \
  #  -e "s#\#exec highlight --force -f -I -O xhtml#exec highlight --force --inline-css -f -I -O xhtml#g" \
  #  /usr/lib/cgit/filters/syntax-highlighting.sh

  # Nginx configuration
  rm /etc/nginx/conf.d/default.conf

  cat > /etc/nginx/conf.d/cgit.conf <<- EOF
  server {
    listen 80 default_server;
    server_name localhost;

    root /usr/share/webapps/cgit;
    try_files \$uri @cgit;

    location ~* ^.+\.(css|png|ico)$ {
      expires 30d;
    }

    location / {
      index cgit.cgi;
      fastcgi_param SCRIPT_FILENAME \$document_root/cgit.cgi;
      fastcgi_pass unix:/run/fcgiwrap/fcgiwrap.socket;
      fastcgi_param HTTP_HOST \$server_name;
      fastcgi_param PATH_INFO \$uri;
      fastcgi_param QUERY_INFO \$uri;
      include "fastcgi_params";
    }
  }
EOF

fi

# Start sshd as detach, log to stderr (-e)
/usr/sbin/sshd -e

# launch fcgiwrap via spawn-fcgi, port 1234
spawn-fcgi -s /run/fcgiwrap/fcgiwrap.socket -f /usr/bin/fcgiwrap
chmod 660 /run/fcgiwrap/fcgiwrap.socket

# Start git-daemon
git daemon --detach --reuseaddr --base-path=/var/lib/git/repositories /var/lib/git/repositories

# Start nginx
exec nginx -g "daemon off;"