"The discovered commit has an invalid length" bug

[my1e5]

Set up a simple dynamic version library

$ uv init --lib foo

Edit the pyproject.toml to use a dynamic version, the hatch vcs plugin and uv git=true cache-keys.

[project]
name = "foo"
description = "Add your description here"
readme = "README.md"
requires-python = ">=3.12"
dependencies = []
dynamic = ["version"]

[build-system]
requires = ["hatchling", "hatch-vcs"]
build-backend = "hatchling.build"

[tool.hatch.version]
source = "vcs"

[tool.uv]
cache-keys = [{ git = true }]

Run uv sync

$ uv sync
.
 + foo==0.1.dev0+d20241004 (from file:///C:/Users/.../foo)
.

All good so far - there isn't any Git commit history.

Make a commit and sync again.

$ git add .
$ git commit -m "initial"
$ uv -v sync
DEBUG uv 0.4.18
DEBUG Found project root: `C:\Users\me\...\foo`
DEBUG No workspace root found, using project root
DEBUG Reading requests from `C:\Users\me\...\foo\.python-version`
DEBUG The virtual environment's Python version satisfies `Python 3.12`
DEBUG Using request timeout of 30s
DEBUG No static `pyproject.toml` available for: foo @ file:///C:/Users/me/.../foo (PyprojectToml(DynamicField("version")))
DEBUG Acquired lock for `C:\Users\me\AppData\Local\uv\cache\sdists-v4\editable\087dff0042ae766a`
DEBUG Failed to read the current commit: The discovered commit has an invalid length (expected 40 characters): `0f4599403b2f1736440acf2c215273e8d418e8ad
`
DEBUG Using cached metadata for: foo @ file:///C:/Users/me/.../foo
DEBUG No workspace root found, using project root
DEBUG Released lock at `C:\Users\me\AppData\Local\uv\cache\sdists-v4\editable\087dff0042ae766a\.lock`
DEBUG Existing `uv.lock` satisfies workspace requirements
Resolved 1 package in 4ms
DEBUG Using request timeout of 30s
DEBUG Requirement installed, but not fresh: foo==0.1.dev0+d20241004 (from file:///C:/Users/me/.../foo)
DEBUG Failed to read the current commit: The discovered commit has an invalid length (expected 40 characters): `0f4599403b2f1736440acf2c215273e8d418e8ad
`
DEBUG Directory source requirement already cached: foo==0.1.dev0+d20241004 (from file:///C:/Users/me/.../foo)
DEBUG Uninstalled foo (7 files, 1 directory)
Uninstalled 1 package in 1ms
Installed 1 package in 11ms
 ~ foo==0.1.dev0+d20241004 (from file:///C:/Users/me/.../foo)

It seems uv is failing to read the commit correctly?

DEBUG Failed to read the current commit: The discovered commit has an invalid length (expected 40 characters): 

It looks like it could be a newline problem? Is it including a newline character therefore taking it over 40 characters?

If you run uv sync --reinstall it works

$ uv sync --reinstall
.
Uninstalled 1 package in 2ms
Installed 1 package in 9ms
 - foo==0.1.dev0+d20241004 (from file:///C:/Users/me/.../foo)
 + foo==0.1.dev1+g0f45994 (from file:///C:/Users/me/.../foo)

Reproducible on macOS and Windows.

$ uv version
uv 0.4.18 (7b55e9790 2024-10-01)

[charliermarsh]

Thanks, fixed in #7922.