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Mads Kiilerich

git: more elegant handling of installed pre/post-receive hook failing on direct repo access

The hook would fail with a long backtrace when get_hook_environment raise an error exception.

Instead, as first thing in the entry point from the hook, catch that situation
and report it nicely before "quietly" skipping the hook:

[mk@here myrepo]$ git push
Enumerating objects: 3, done.
Counting objects: 100% (3/3), done.
Writing objects: 100% (3/3), 204 bytes | 204.00 KiB/s, done.
Total 3 (delta 0), reused 0 (delta 0)
remote: Skipping Kallithea Git post-recieve hook 'hooks/post-receive'.
remote: Git was apparently not invoked by Kallithea: Environment variable KALLITHEA_EXTRAS not found
To /tmp/somerepo
* [new branch] master -> master
[mk@here myrepo]$

We could be paranoid and let it (and the pre hook) fail ... but that doesn't
seem helpful.

Reported by Edmund Wong at [1].

[1] https://lists.sfconservancy.org/pipermail/kallithea-general/2019q4/003071.html

#!/bin/sh -e
########################################
#### THIS IS A DEBIAN INIT.D SCRIPT ####
########################################

### BEGIN INIT INFO
# Provides:          kallithea
# Required-Start:    $all
# Required-Stop:     $all
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts instance of kallithea
# Description:       starts instance of kallithea using start-stop-daemon
### END INIT INFO

APP_NAME="kallithea"
APP_HOMEDIR="opt"
APP_PATH="/$APP_HOMEDIR/$APP_NAME"

CONF_NAME="production.ini"

PID_PATH="$APP_PATH/$APP_NAME.pid"
LOG_PATH="$APP_PATH/$APP_NAME.log"

PYTHON_PATH="/$APP_HOMEDIR/$APP_NAME-venv"

RUN_AS="root"

DAEMON="$PYTHON_PATH/bin/gearbox"

DAEMON_OPTS="serve --daemon \
 --user=$RUN_AS \
 --group=$RUN_AS \
 --pid-file=$PID_PATH \
 --log-file=$LOG_PATH -c $APP_PATH/$CONF_NAME"


start() {
  echo "Starting $APP_NAME"
  PYTHON_EGG_CACHE="/tmp" start-stop-daemon -d $APP_PATH \
      --start --quiet \
      --pidfile $PID_PATH \
      --user $RUN_AS \
      --exec $DAEMON -- $DAEMON_OPTS
}

stop() {
  echo "Stopping $APP_NAME"
  start-stop-daemon -d $APP_PATH \
      --stop --quiet \
      --pidfile $PID_PATH || echo "$APP_NAME - Not running!"

  if [ -f $PID_PATH ]; then
    rm $PID_PATH
  fi
}

status() {
  echo -n "Checking status of $APP_NAME ... "
  pid=`cat $PID_PATH`
  status=`ps ax | grep $pid | grep -ve grep`
  if [ "$?" -eq 0 ]; then
    echo "running"
  else
    echo "NOT running"
  fi
}

case "$1" in
  status)
   status
    ;;
  start)
    start
    ;;
  stop)
    stop
    ;;
  restart)
    echo "Restarting $APP_NAME"
    ### stop ###
    stop
    wait
    ### start ###
    start
    ;;
  *)
    echo "Usage: $0 {start|stop|restart}"
    exit 1
esac