#!/bin/sh

set -e

die () {
    echo "$0: Error: $1" >&2
    exit 1
}

if [ $# -ne 2 ]
then
    die "Need 2 arguments: darcs-repo git-repo"
fi

DARCS_REPO="$1"
GIT_REPO="$2"

DARCS_FASTCONVERT=/srv/local/bin/darcs-fastconvert
GIT_FAST_IMPORT=git-fast-import

if [ ! -d "$DARCS_REPO" ]; then
   die "does not exist: $DARCS_REPO"
fi

if [ ! -d "$GIT_REPO" ]; then
   mkdir -p "$GIT_REPO"
   cd "$GIT_REPO" && git init
fi

DARCS_MARKS="$GIT_REPO/.darcs-marks"
GIT_MARKS="$GIT_REPO/.git-marks"

[ -f "$DARCS_MARKS" ] || touch "$DARCS_MARKS"
[ -f "$GIT_MARKS"   ] || touch "$GIT_MARKS"

# echo "Mirroring $DARCS_REPO to $GIT_REPO..."

( cd "$DARCS_REPO" && "$DARCS_FASTCONVERT" export --read-marks="$DARCS_MARKS" --write-marks="$DARCS_MARKS" ) | \
  ( cd "$GIT_REPO" && "$GIT_FAST_IMPORT" --quiet --import-marks="$GIT_MARKS" --export-marks="$GIT_MARKS" ) > /dev/null
cd "$GIT_REPO" && git update-server-info