#!/bin/bash -l
# Copyright (C) 2016 Ian Kelling
# This program is under GPL v. 3 or later, see <http://www.gnu.org/licenses/>

set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR

domain=$1

if [[ ! $1 ]]; then
    echo "$0: error: expected domain argument"
    exit 1
fi

gitroot=/a/bin/githtml

type -P a2enmod &>/dev/null || pi apache2

acme-tiny-wrapper $domain

# debian has the package gitweb, which seems to mainly
# have some example apache config, and a minimal gitweb config.
# I'll just use the config as example and not use the package.
# It's example apache config seems to say we can use cgi or cgid,
# and googling cgid it seems a newer faster alternative.
sudo a2enmod cgid

# so, highlight is not highlighting my
pi highlight

# additional settings from browsing https://git-scm.com/docs/gitweb.conf
s dd of=/etc/gitweb.conf <<EOF
\$feature{'highlight'}{'default'} = [1];
# highlighting doesn't work on files without extension.
# I noticed in terminal "highlight file" won't do it (unknown file type)
# hightlight < file will do it, and it's online documentation
# suggests it reads shebang. Todo: file a bug for gitweb
# to make highlight read shebangs.
our \$projectroot = "$gitroot";
# not documented at https://git-scm.com/docs/gitweb.conf,
# but it's in the debian conf, so use it.
# directory to use for temp files.
\$git_temp = "/tmp";
push @git_base_url_list, "https://$domain/git";
EOF


apache-site - $domain <<EOF
# to run python script on my site:
<Directory /var/www/$domain/html>
  # to run python scripts with cgi
  Options +ExecCGI
  AddHandler cgi-script .py
</Directory>


# All below is for gitweb + git-http-web.
# A simple builtin way to have a read only git website.
# I didn't find any significantly better alternatives out there.
SetEnv GIT_PROJECT_ROOT $gitroot
SetEnv GIT_HTTP_EXPORT_ALL

# note: cgi scripts can go anywhere into the filesystem,
# so there is no need to do a directory block for $gitroot

# fot git-http-web
<Directory /usr/lib/git-core>
        AllowOverride None
        Require all granted
</Directory>

<Directory /usr/share/gitweb>
  Options +FollowSymLinks +ExecCGI
  AddHandler cgi-script .cgi
</Directory>

# from  man-git-http-backend, so git-http-web ang gitweb can both be used.
# it is instead of this:
# #ScriptAlias / /usr/lib/git-core/git-http-backend/
ScriptAliasMatch \\
       "(?x)^/git/(.*/(HEAD | \\
                       info/refs | \\
                       objects/(info/[^/]+ | \\
                                [0-9a-f]{2}/[0-9a-f]{38} | \\
                                pack/pack-[0-9a-f]{40}\\.(pack|idx)) | \\
                       git-(upload|receive)-pack))\$" \\
       /usr/lib/git-core/git-http-backend/\$1



# man-git-http-backend claims we should do this, but
# it causes no css/images to be displayed. Instead,
# just stick with the standard gitweb example directive
# from debian.
#ScriptAlias /git /usr/share/gitweb/gitweb.cgi/
Alias /git /usr/share/gitweb
EOF