Avoid noise during builds:
> fatal: No annotated tags can describe '417449f468c4ba186954f6295b3338fb55ee7b4a'.
> However, there were unannotated tags: try --tags.
This might be useful in general, but is expected to not happen - and
falling back is OK then. The fallback command would still display
errors then.
It also uses `--first-parent`, which is important for when a release
branch gets merged back.
* Fix/keep massaging git-describe result
Ref: https://github.com/neovim/neovim/pull/11117#issuecomment-536416223
* build: revisit generation of version from Git
Fixes "make clean && make", where "auto/versiondef.h" would be missing
since b18b84d - because BYPRODUCTS are apparently removed when cleaning.
This includes the following improvements/changes:
- do not run git-describe during CMake's configure phase just for
reporting
- do not print with changed Git version (too noisy, simplifies code)
* Move to src/nvim (included before config) for easier flow
* fallback to describe always, write empty include file
* update_version_stamp.lua: use prefix always
This avoids invoking CMake after a new commit, which might take 15s on
some systems.
Skipped on CMake < 3.2.0 (missing BYPRODUCTS support).
Co-Authored-By: Justin M. Keyes <justinkz@gmail.com>
