Ask `nix-prefetch-git' to leave `.git' in the output.

Dependencies

• [2] NJBETZ2C Use $NIX_PREFETCH_GIT_CHECKOUT_HOOK to produce a `.git-version' file.
• [3] OOQ2D3KC * Refactoring: move fetchInput out of hydra_scheduler into a separate
• [4] JTRG7RDQ add support for git as jobinput

Change contents

• replacement in src/lib/Hydra/Helper/AddBuilds.pm at line 241
  [3.1120]→[2.0:73](∅→∅)
  − $ENV{"NIX_PREFETCH_GIT_CHECKOUT_HOOK"} = "git describe > .git-version";
  [3.1120]

  [3.1120]
  +

  + # Checked out code often wants to be able to run `git

  + # describe', e.g., code that uses Gnulib's `git-version-gen'

  + # script. Thus, we leave `.git' in there.

  + $ENV{"NIX_PREFETCH_GIT_LEAVE_DOT_GIT"} = "1";

  +