We retry several kinds of network request failures, but it's often unclear whether a request was retried or not (https://github.com/astral-sh/uv/issues/3514#issuecomment-2105485773). This PR adds a small intermediary layer that logs all transient request failures, adding the `DEBUG Transient request failure` lines: ``` DEBUG Searching for Python interpreter in virtual environments DEBUG Found CPython 3.12.3 at `/home/konsti/projects/uv/.venv/bin/python3` (active virtual environment) DEBUG Using Python 3.12.3 environment at .venv/bin/python3 DEBUG Acquired lock for `.venv` DEBUG At least one requirement is not satisfied: tqdm DEBUG Using registry request timeout of 30s DEBUG Solving with target Python version 3.12.3 DEBUG Adding direct dependency: tqdm* DEBUG No cache entry for: https://pypi.org/simple/tqdm/ DEBUG Transient request failure for https://pypi.org/simple/tqdm/, retrying: Request error: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: client error (Connect) Caused by: dns error: failed to lookup address information: Name or service not known Caused by: failed to lookup address information: Name or service not known DEBUG Transient request failure for https://pypi.org/simple/tqdm/, retrying: Request error: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: client error (Connect) Caused by: dns error: failed to lookup address information: Name or service not known Caused by: failed to lookup address information: Name or service not known DEBUG Transient request failure for https://pypi.org/simple/tqdm/, retrying: Request error: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: client error (Connect) Caused by: dns error: failed to lookup address information: Name or service not known Caused by: failed to lookup address information: Name or service not known DEBUG Transient request failure for https://pypi.org/simple/tqdm/, retrying: Request error: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: client error (Connect) Caused by: dns error: failed to lookup address information: Name or service not known Caused by: failed to lookup address information: Name or service not known error: Could not connect, are you offline? Caused by: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: client error (Connect) Caused by: dns error: failed to lookup address information: Name or service not known Caused by: failed to lookup address information: Name or service not known ``` I decided for multi-line logging to show the complete error trace since only `Transient request failure for https://pypi.org/simple/tqdm/, retrying: Request error: error sending request for url (https://pypi.org/simple/tqdm/)` doesn't tell you the actual problem (a dns error). Note that running with `-v` will not show messages about retry backoff timing, but running with `RUST_LOG=debug` now shows a complete picture: ``` DEBUG starting new connection: https://pypi.org/ DEBUG resolving host="pypi.org" DEBUG Transient request failure for https://pypi.org/simple/tqdm/, retrying: Request error: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: error sending request for url (https://pypi.org/simple/tqdm/) Caused by: client error (Connect) Caused by: dns error: failed to lookup address information: Name or service not known Caused by: failed to lookup address information: Name or service not known WARN Retry attempt #2. Sleeping 528.728192ms before the next attempt ``` Fixes #3572
Crates
bench
Functionality for benchmarking uv.
cache-key
Generic functionality for caching paths, URLs, and other resources across platforms.
distribution-filename
Parse built distribution (wheel) and source distribution (sdist) filenames to extract structured metadata.
distribution-types
Abstractions for representing built distributions (wheels) and source distributions (sdists), and the sources from which they can be downloaded.
install-wheel-rs
Install built distributions (wheels) into a virtual environment.]
once-map
A waitmap-like concurrent hash map for executing tasks
exactly once.
pep440-rs
Utilities for interacting with Python version numbers and specifiers.
pep508-rs
Utilities for interacting with PEP 508 dependency specifiers.
platform-host
Functionality for detecting the current platform (operating system, architecture, etc.).
platform-tags
Functionality for parsing and inferring Python platform tags as per PEP 425.
uv
Command-line interface for the uv package manager.
uv-build
A PEP 517-compatible build frontend for uv.
uv-cache
Functionality for caching Python packages and associated metadata.
uv-client
Client for interacting with PyPI-compatible HTTP APIs.
uv-dev
Development utilities for uv.
uv-dispatch
A centralized struct for resolving and building source distributions in isolated environments.
Implements the traits defined in uv-types.
uv-distribution
Client for interacting with built distributions (wheels) and source distributions (sdists). Capable of fetching metadata, distribution contents, etc.
uv-extract
Utilities for extracting files from archives.
uv-fs
Utilities for interacting with the filesystem.
uv-git
Functionality for interacting with Git repositories.
uv-installer
Functionality for installing Python packages into a virtual environment.
uv-interpreter
Functionality for detecting and leveraging the current Python interpreter.
uv-normalize
Normalize package and extra names as per Python specifications.
uv-package
Types and functionality for working with Python packages, e.g., parsing wheel files.
uv-requirements
Utilities for reading package requirements from pyproject.toml and requirements.txt files.
uv-resolver
Functionality for resolving Python packages and their dependencies.
uv-types
Shared traits for uv, to avoid circular dependencies.
pypi-types
General-purpose type definitions for types used in PyPI-compatible APIs.
uv-virtualenv
A venv replacement to create virtual environments in Rust.
uv-warnings
User-facing warnings for uv.
requirements-txt
Functionality for parsing requirements.txt files.