At some point the upstream changed and gitstatus.prompt.zsh stopped
working. The issue was that this file expects to be able to run the
"install" script in the same directory.
- Install the "install" script and "build.info" file that
gitstatus.prompt.zsh expects to be able to find when it runs.
- Patch the install script so that it defaults to not automatically
installing gitstatus. This can still be overridden by setting
GITSTATUS_AUTO_INSTALL=1, although I'm not sure why anyone would do
this if they've already installed gitstatus with Nix.
- Add an install check phase that tests the zsh integration to prevent
this derivation from breaking in the same way in the future. (This
also ends up testing the binary itself.)
Fixes#96135.
In 6733ece `-DUSE_HTTP_PARSER=system` was introduced, which does not seem
to work with this fork. So instead fallback to the `builtin`.
Also sync with upstream cmake flags.
The sed invocation was changing all lines matching "local daemon.*".
This changed the line it was supposed to, but two other lines that also
matched that pattern were being modified, which meant that the
"daemon_pid_var" and "daemon_pid" variables were not defined when they
should have been.
