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#! /usr/bin/env bash

# Create remote git repository (on the server). You must run this script from
# the "repositories root" (e.g., /var/scm) where you want the repository to be
# created (including any subdirectories). If the repository is public, also
# add it to the manifest file (used for mirroring), together with an optional
# remote URL where the repository must additionally be mirrored to.
#
# --private
#   make the repository private
#
# Note: <name> can be without the .git suffix.
#
usage="usage: $0 [--private] <name> [<remote-mirror-url>]"

owd="$(pwd)"
trap "{ cd '$owd'; exit 1; }" ERR
set -o errtrace # Trap in functions.

function info () { echo "$*" 1>&2; }
function error () { info "$*"; exit 1; }

public="y"

while [ "$#" -gt 0 ]; do
  case "$1" in
    --private)
      public="n"
      shift
      ;;
    -*)
      error "unknown option: $1"
      ;;
    *)
      break
      ;;
  esac
done

if [ -z "$1" ]; then
  error "repository name expected"
fi

r="$1"
shift

if [ "$(basename "$r")" = "$(basename --suffix=.git "$r")" ]; then
  r="$r.git"
fi

u=
if [ -n "$1" ]; then
  if [ "$public" = "n" ]; then
    error "private repository cannot be mirrored"
  fi

  u="$1"
fi

gr='scm'

mkdir -p "$r"
chgrp "$gr" "$r"
git --bare init --shared=all "$r"
info "Enter project description (one line; or edit $r/descrition later)"
info "Hit Ctrl-D when done"
cat >"$r/description"
chgrp -R "$gr" "$r"

if [ "$public" = "y" ]; then
  f="$r/git-daemon-export-ok"
  touch  "$f"
  chgrp "$gr" "$f"
  chmod g+w "$f"
else
  # Disable raw HTTP access to this directory.
  #
  echo "deny from all" >"$r/.htaccess"
fi

mv "$r/hooks/post-update.sample" "$r/hooks/post-update"

if [ "$public" = "y" ]; then
  l="$r"

  if [ -n "$u" ]; then
    l="$l $u"
  fi

  echo "$l" >>manifest
fi