diff Makefile @ 50092:010a1e73f69e stable

setup: further improve the error path for version retrieval

This is a new take at the problem that 8d390a13474d tried to tackle. There was
two issues after that previous improvement:

- the 0.0+ version could survive a bit too long and reaching the installer
  version and staying there.
- multiple use case where still failing.

So the new code is better at:
- always succeeding when running `make local` so that we can
  bootstrap a local version
- no using that fallback outside of `make local` to avoid distribution of
  version with the buggy version number.

The setup.py is a gigantic pile of spaghetti code, to the point where
pastafarian pilgrim started knocking at its core.

However I refrained from cleaning that up since the more to a `setup.cfg` means
this code should be deleted soon™.

--- a/Makefile	Fri Feb 17 14:00:39 2023 +0100
+++ b/Makefile	Fri Feb 17 16:45:36 2023 +0100
@@ -58,7 +58,7 @@
 all: build doc
 
 local:
-	$(PYTHON) setup.py $(PURE) \
+	MERCURIAL_SETUP_MAKE_LOCAL=1 $(PYTHON) setup.py $(PURE) \
 	  build_py -c -d . \
 	  build_ext $(COMPILERFLAG) -i \
 	  build_hgexe $(COMPILERFLAG) -i \