Bash tarball extractor replacing symlinks with real copies for MSYS(2) environments and alike.

untar.sh

# Bash tarball extractor function which replaces symlinks with real copies.
# Useful for platforms which do not handle symlinks well, such as MSYS(2).
untar() {
  case "$1" in
    *.tar)
      u=
      ;;
    *.tar.gz|*.tgz)
      u=z
      ;;
    *.tar.bz|*.tar.bz2|*.tbz2|*.tbz)
      u=j
      ;;
    *.tar.xz|*.txz)
      u=J
      ;;
    *)
      exit -1
      ;;
  esac

  tar x${u}f $1 2> /dev/null

  ifs=$IFS
  IFS=$'\n'
  for s in `tar tv${u}f $1 | grep '^l.*->' -`; do
    IFS=' ' read -r -a f <<< "$s"
    dst="${f[8]}"
    src=`dirname "$dst"`/"${f[10]}"
    cp -r "$src" "$dst"
  done
  IFS=$ifs
}