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Thomas De Schampheleire

setup.py: support Paste 3.0.x

In a fresh virtualenv on the stable branch, pastescript 3.0.0 is installed
which depends on paste 3.0.x. Using this virtualenv to upgrade to the
default branch, using 'pip install --upgrade -e .' fails because on the
default branch, the paste version is restricted with '>= 2.0.3, < 3'.
Following error occurs:

pastescript 3.0.0 has requirement Paste>=3.0, but you'll have paste 2.0.3 which is incompatible.
...
Traceback (most recent call last):
File "<string>", line 1, in <module>
File ".../kallithea/kallithea-release/setup.py", line 160, in <module>
""",
File "/usr/lib64/python2.7/distutils/core.py", line 151, in setup
dist.run_commands()
File "/usr/lib64/python2.7/distutils/dist.py", line 953, in run_commands
self.run_command(cmd)
File "/usr/lib64/python2.7/distutils/dist.py", line 972, in run_command
cmd_obj.run()
File ".../kallithea/venv/kallithea-release/lib/python2.7/site-packages/setuptools/command/develop.py", line 36, in run
self.install_for_development()
File ".../kallithea/venv/kallithea-release/lib/python2.7/site-packages/setuptools/command/develop.py", line 117, in install_for_development
self.run_command('egg_info')
File "/usr/lib64/python2.7/distutils/cmd.py", line 326, in run_command
self.distribution.run_command(command)
File "/usr/lib64/python2.7/distutils/dist.py", line 972, in run_command
cmd_obj.run()
File ".../kallithea/venv/kallithea-release/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 270, in run
ep.require(installer=installer)
File ".../kallithea/venv/kallithea-release/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2307, in require
items = working_set.resolve(reqs, env, installer)
File ".../kallithea/venv/kallithea-release/lib/python2.7/site-packages/pkg_resources/__init__.py", line 854, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.VersionConflict: (Paste 2.0.3 (.../kallithea/venv/kallithea-release/lib/python2.7/site-packages), Requirement.parse('Paste>=3.0'))

The '< 3' restriction is introduced with commit
e1ab826131334150b1f003e26de3207c34fc6e67 in January 2017, at which point
2.0.3 was the latest version. Version 3.0.0 was introduced in October 2018.

Paste has a new maintainer and moved to github, after years of
inactivity (March 2016 -> Oct 2018). There have AFAICS not been
incompatible changes. This analysis is based on:
- the news file: https://pythonpaste.readthedocs.io/en/latest/news.html
- the commit message of the 3.0.0 release:
(https://github.com/cdent/paste/commit/9ceef07267ba83ea5c00533f85f9edf9ba38cd71)

"This is for the sake of getting something out there, including
fixes to get stuff working with Python 3.7."

- and a walk through the commits since 2.0.3 on github
(https://github.com/cdent/paste/commits/master).

#!/bin/sh
########################################
#### THIS IS A REDHAT INIT.D SCRIPT ####
########################################

##################################################
#
# Kallithea server startup script
# Recommended default-startup: 2 3 4 5
# Recommended default-stop: 0 1 6
#
##################################################


APP_NAME="kallithea"
# the location of your app
# since this is a web app, it should go in /var/www
APP_PATH="/var/www/$APP_NAME"

CONF_NAME="production.ini"

# write to wherever the PID should be stored, just ensure
# that the user you run gearbox as has the appropriate permissions
# same goes for the log file
PID_PATH="/var/run/kallithea/pid"
LOG_PATH="/var/log/kallithea/kallithea.log"

# replace this with the path to the virtual environment you
# made for Kallithea
PYTHON_PATH="/opt/python_virtualenvironments/kallithea-venv"

RUN_AS="kallithea"

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"

DESC="kallithea-server"
LOCK_FILE="/var/lock/subsys/$APP_NAME"

# source CentOS init functions
. /etc/init.d/functions

RETVAL=0

remove_pid () {
  rm -f ${PID_PATH}
  rmdir `dirname ${PID_PATH}`
}

ensure_pid_dir () {
  PID_DIR=`dirname ${PID_PATH}`
  if [ ! -d ${PID_DIR} ] ; then
    mkdir -p ${PID_DIR}
    chown -R ${RUN_AS}:${RUN_AS} ${PID_DIR}
    chmod 755 ${PID_DIR}
  fi
}

start_kallithea () {
    ensure_pid_dir
    PYTHON_EGG_CACHE="/tmp" daemon --pidfile $PID_PATH \
        --user $RUN_AS "$DAEMON $DAEMON_OPTS"
    RETVAL=$?
    [ $RETVAL -eq 0 ] && touch $LOCK_FILE
    return $RETVAL
}

stop_kallithea () {
    if [ -e $LOCK_FILE ]; then
      killproc -p $PID_PATH
      RETVAL=$?
      rm -f $LOCK_FILE
      rm -f $PID_PATH
    else
      RETVAL=1
    fi
    return $RETVAL
}

status_kallithea() {
  if [ -e $LOCK_FILE ]; then
    # exit with non-zero to indicate failure
    RETVAL=1
  else
    RETVAL=0
  fi
  return $RETVAL
}

restart_kallithea () {
    stop_kallithea
    start_kallithea
    RETVAL=$?
}

case "$1" in
  start)
    echo -n $"Starting $DESC: "
    start_kallithea
    echo
    ;;
  stop)
    echo -n $"Stopping $DESC: "
    stop_kallithea
    echo
    ;;
  status)
    status_kallithea
    RETVAL=$?
    if [ ! $RETVAL -eq 0 ]; then
      echo "Kallithea server is running..."
    else
      echo "Kallithea server is stopped."
    fi
    ;;
  restart)
    echo -n $"Restarting $DESC: "
    restart_kallithea
    echo
    ;;
  *)
    echo $"Usage: $0 {start|stop|restart|status}"
    RETVAL=1
    ;;
esac

exit $RETVAL