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#!/bin/zsh
#
# func/vcsh
#
# set the context for vcs-home operations
#
# Copyright © 1994–2008 martin f. krafft <madduck@madduck.net>
# Released under the terms of the Artistic Licence 2.0
#
# Source repository: git://git.madduck.net/etc/zsh.git
#

local GITS_DIR="$HOME/.gits"

if [ "${1:---help}" = '--help' ] || [ $# -lt 1 ]; then
  echo "usage: ${0##*/} REPONAME" >&2
  echo "usage: ${0##*/} REPONAME COMMAND ARGS" >&2
  echo "usage: ${0##*/} -l" >&2
  [ "$1" = '--help' ]
  return $?
elif [ "$1" = '-l' ]; then
  for i in $GITS_DIR/*.git; do
    i="${i#$GITS_DIR/}"
    echo "${i%.git}"
  done
  return 0
fi

if [ ! -d "$GITS_DIR/${1}.git" ]; then
  echo E: no repository found for "$1" >&2
  return 2
fi

old_GIT_DIR="${GIT_DIR:-}"
old_GIT_WORK_TREE="${GIT_WORK_TREE:-}"

local repo="$1"; shift

export GIT_DIR="$GITS_DIR/${repo}.git"
export GIT_WORK_TREE="$GIT_DIR/$(git config --get core.worktree)"

if [ $# -eq 0 ]; then
    PSEXTRA="%B{${0##*/}:${repo}}%b" $SHELL -i || :
else
    "$@"
fi
GIT_DIR="$old_GIT_DIR"
[ -z "$GIT_DIR" ] && unset GIT_DIR
GIT_WORK_TREE="$old_GIT_WORK_TREE"
[ -z "$GIT_WORK_TREE" ] && unset GIT_WORK_TREE