v0.3.1

Fixes found by putting two hundred existing checkouts under the store with h store ingest.

Fixes

• Repositories with a stray gitlink, one that .gitmodules names no submodule for (such as a nested checkout committed by mistake), get their submodules again. h store ingest, h go and the WorktreeCreate hook all used to stop at it, so no submodule was cloned and, with an identity in the git options, h go failed. Like git, h now leaves such a gitlink as it is, and says so.
• Shallow and partial clones stay out of the store, as 0.3.0 meant them to:
  • --depth, --shallow-* and --filter given among the git options after --, as h-shell-init --git-opts passes them, used to put the clone's upstream in the store and fetch all of its history there. A fork's upstream remote was fetched in full beside a shallow clone in the same way.
  • h store ingest of a shallow or partial checkout no longer adds its upstream to the store, which downloaded at once all the history the checkout was made without. It names each upstream it leaves out. The checkout still borrows from an upstream the store has already.
• Store names for GitHub repositories are GitHub's own: github.com/NixOS/nixpkgs however a remote spells it, and a renamed or transferred repository under its current name.
  • h store ingest used to take the casing a remote's URL was written in, and the wrong name then stuck, since the store matches GitHub names whatever their case.
  • An upstream already in the store under a wrong or old name is renamed in place, with its branches, tags and default branch. When the right name is there too, the wrong one is dropped. Clones that borrow from the store are fixed up as h comes to them. h store add <term> renames one at once.
  • GitHub is only asked when the store does not already have the name, with no token first, as elsewhere.
• ssh://user@host/... URLs no longer keep the user in the name: ssh://git@github.com/o/r is the store's github.com/o/r, fetched over HTTPS, and h go clones it to github.com/o/r.
• h store ingest puts every remote in the store, whatever it is called, for the checkout and for each submodule. It used to take only origin (or a sole remote) and upstream, so a second fork, or linux's stable, stayed out, and a checkout whose remotes had other names had nothing put in the store at all. Only the own remote's tags count as the checkout's; the store fetches the others' tags from their URLs.
• h store ingest names the remotes it cannot put in the store, such as an SSH host alias like me.github.com:owner/repo or a local path, and exits nonzero. Before, it skipped them without a word.

Under the hood

• Tests: 246 unit and end-to-end tests.
• macOS builds with Nix's sandbox no longer fail the tests that serve a mock GitHub API on localhost.