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#!/bin/sh
# going-flying.com post-receive hook for gemini://
# (c) 2016-2024 Matthew J. Ernisse <matt@going-flying.com>
# All Rights Reserved.
#
# Update the on-disk representation of my capsule when I push a new
# revision up to the git repository.

set -e

BRANCH=""
BUILD_DIR="/var/gemini"
CLONE_CREDS="$(cat hooks/.clone_creds)"
GIT_DIR=$(git rev-parse --git-dir 2>/dev/null)
REV=0

while read oldrev newrev refname; do
	BRANCH="$refname"
	REV="$newrev"
done

if [ "$BRANCH" != "refs/heads/master" ]; then
	echo "detected $BRANCH, aborting"
	exit 0
fi

if [ -z "$GIT_DIR" ]; then
	echo >&2 "fatal: post-receive GIT_DIR not set"
	exit 1
fi

cat << EOF
                                »^  \
                               ƒ     L
                      ▄▄▄▌     ⌐    ╒
                     ██████b   ¼   /   ,╓▄▄▓█▌
                    ▐██████▌     )Θ    ╙└ ╟███▌
                    ╫███████    ]   ╕   Φ█▀██▓█
                    ████████    ╞    b "▓ ▐█╙¬
                    ████████         ╘ ]  ╚▀
                    ████████⌐    └
                   ██████████ ╓┐  Γ
                  ▓█████████████ ,¬
                 ▐███████████████
                ]█████████████████
                ████████████████▀╙
              ]██████████████████
              ╟██████████████████
              ╫██████████████████▌
              ████████████████████
             ▐████████████████████⌐
             █████████████████████▌
            ,██████████████████████
            ▐██████████████████████µ
               ─└└└└└└└└└└└└└└└└└─
EOF

umask 0022

if [ ! -d "$BUILD_DIR" ]; then
	echo "Creating $BUILD_DIR"

	mkdir -p -- "$BUILD_DIR"
	chgrp www-data "$BUILD_DIR"
	chmod 664 "$BUILD_DIR"
fi

echo "updating $BUILD_DIR"
GIT_WORK_TREE=$BUILD_DIR git checkout -f

$BUILD_DIR/build/build.py "$BUILD_DIR/users/mernisse/"

echo "setting rev to $REV"
sed -e "s/GIT_REV/${REV}/" "$BUILD_DIR/how-built.gmi" > \
	"$BUILD_DIR/how-built.gmi.new"
mv $BUILD_DIR/how-built.gmi.new $BUILD_DIR/how-built.gmi

if [ ! -d "$BUILD_DIR/git/repo" ]; then
	mkdir -p -- "$BUILD_DIR/git/repo"
	sudo -u mernisse chown -- "$BUILD_DIR/git/repo"
fi

if [ -d "$BUILD_DIR/git/repo/gemini.git" ]; then
	sudo -u mernisse rm -r -- "$BUILD_DIR/git/repo/gemini.git"
fi

echo "Cloning bare repository for cgi."
sudo -u mernisse git -C $BUILD_DIR/git/repo clone --bare \
	https://${CLONE_CREDS}@ssl.ub3rgeek.net/repo/gemini.git

echo "site deployed."