fetchdarcs: fetch by commit hash

tagtext=""

tagflags=""

if test -n "$rev"; then

# Darcs hashes are sha1 (120 bits, 40-character hex)

if [[ "$rev" =~ [a-fA-F0-9]{40} ]]; then

    tagtext="(hash $rev)"

    tagflags="--to-hash=$rev"

elif test -n "$rev"; then

    tagtext="(tag $rev)"

    tagflags="--tag=$rev"

elif test -n "$context"; then

{stdenvNoCC, darcs, cacert}:

{url, rev ? null, context ? null, md5 ? "", sha256 ? ""}:

{ url

, rev ? null

, context ? null

, md5 ? ""

, sha256 ? ""

, name ? "fetchdarcs"

}:

if md5 != "" then

  throw "fetchdarcs does not support md5 anymore, please use sha256"

else

stdenvNoCC.mkDerivation {

  name = "fetchdarcs";

  builder = ./builder.sh;

  nativeBuildInputs = [cacert darcs];

  outputHashMode = "recursive";

  outputHash = sha256;

  inherit url rev context;

  inherit url rev context name;

}