#!/bin/sh

# install the gitolite software *system wide*.  Not too robust, fancy, etc.,
# but does have a usage message and catches simple problems.

usage() { echo "
    Usage:
        $0 shared-bin-dir shared-conf-dir shared-hooks-dir

    Example:
        $0 /usr/local/bin /var/gitolite/conf /var/gitolite/hooks

    In this example, all the binaries go to /usr/local/bin, and the shared
    conf and hooks files/directories go to the other 2 directories given
"
    exit 1;
}

die() { echo "$@"; echo; usage; exit 1; } >&2

[ -z "$3" ] && usage

gl_bin_dir=$1
[ -d $gl_bin_dir ] || die "$gl_bin_dir not found"
gl_conf_dir=$2
[ -d $gl_conf_dir ] || die "$gl_conf_dir not found"
gl_hooks_dir=$3
[ -d $gl_hooks_dir ] || die "$gl_hooks_dir not found"

bindir=`echo $0 | perl -lpe 's/^/$ENV{PWD}\// unless /^\//; s/\/[^\/]+$//;'`
cd $bindir/..       # we assume the standard gitolite source tree is here!

cp src/* $gl_bin_dir || die "cp src/* to $gl_bin_dir failed"
rm $gl_bin_dir/gl-easy-install
perl -lpi -e "s(^GL_PACKAGE_CONF=.*)(GL_PACKAGE_CONF=$gl_conf_dir)" $gl_bin_dir/gl-setup

# record which version is being sent across; we assume it's HEAD
if git rev-parse --is-inside-work-tree >/dev/null 2>&1
then
    git describe --tags --long HEAD 2>/dev/null > conf/VERSION || die "git describe failed -- this should not happen!"
else
    [ -f conf/VERSION ] || echo '(unknown)' > conf/VERSION
fi

cp -R conf/* $gl_conf_dir || die "cp conf/* to $gl_conf_dir failed"
perl -lpi \
    -e "s(^#\s*\\\$GL_PACKAGE_CONF\s*=.*)(\\\$GL_PACKAGE_CONF = '$gl_conf_dir';)" \
        $gl_conf_dir/example.gitolite.rc
perl -lpi \
    -e "s(^#\s*\\\$GL_PACKAGE_HOOKS\s*=.*)(\\\$GL_PACKAGE_HOOKS = '$gl_hooks_dir';)" \
        $gl_conf_dir/example.gitolite.rc

cp -R hooks/* $gl_hooks_dir || die "cp hooks/* to $gl_hooks_dir failed"