build: don't append git tag on release versions
This prevents duplicate version strings such as v0.8.0-v0.8.0.
Also change the format for git releases from v0.9.0-dev-67-g625ba79be
to v0.9.0-dev-67+g625ba79be. The neovim versions are now:
release: v0.9.0
prerelease without git info: v0.9.0-dev
prerelease with git info: v0.9.0-dev-67+g625ba79be
(cherry picked from commit 90785aafe1)
Co-authored-by: dundargoc <gocdundar@gmail.com>
Add --always flag to `git describe` so version generation succeeds if
current directory is in a git repo. If not in git repo, fall back to a
default version in the format vx.y.z-dev
Problem:
Build fails without git or .git/.
ref #19289
Solution:
Fix the version generation logic.
Test cases:
If `git` is missing:
-- Using NVIM_VERSION_MEDIUM: v0.8.0-dev
If `.git/` is missing:
-- Git tag extraction failed:
fatal: not a git repository (or any of the parent directories): .git
-- Using NVIM_VERSION_MEDIUM: v0.8.0-dev
If `git describe` fails
-- Git tag extraction failed:
fatal: ...
-- Using NVIM_VERSION_MEDIUM: v0.8.0-dev
Co-authored-by: Justin M. Keyes <justinkz@gmail.com>
- only update git-version if both of these conditions are met:
- `git` command succeeds
- `versiondef_git.h` would change (SHA1-diff)
- else print a status/warning message
also move version generation out of Lua into cmake.
