mirror of
https://github.com/astral-sh/uv.git
synced 2025-10-23 08:41:48 +00:00
ad82b94856
## Summary Closes #6319. ## Test Plan I tested with `file:///mirror`, `file://localhost/mirror`, and `http://mirror` to confirm that it was working as expected. ``` shell-session /private/tmp/mirror-local 07:08:18 :) tree mirror mirror/ └── 20240814/ └── cpython-3.12.5+20240814-aarch64-apple-darwin-install_only_stripped.tar.gz ``` <img width="626" alt="image" src="https://github.com/user-attachments/assets/9c04224d-305c-47ee-a524-4a6abeb79da4">
666 lines
21 KiB
Rust
666 lines
21 KiB
Rust
use distribution_filename::{ExtensionError, SourceDistExtension};
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use futures::TryStreamExt;
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use owo_colors::OwoColorize;
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use pypi_types::{HashAlgorithm, HashDigest};
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use std::fmt::Display;
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use std::io;
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use std::path::{Path, PathBuf};
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use std::pin::Pin;
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use std::str::FromStr;
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use std::task::{Context, Poll};
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use thiserror::Error;
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use tokio::io::{AsyncRead, ReadBuf};
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use tokio_util::compat::FuturesAsyncReadCompatExt;
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use tokio_util::either::Either;
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use tracing::{debug, instrument};
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use url::Url;
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use uv_client::WrappedReqwestError;
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use uv_extract::hash::Hasher;
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use uv_fs::{rename_with_retry, Simplified};
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use crate::implementation::{
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Error as ImplementationError, ImplementationName, LenientImplementationName,
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};
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use crate::installation::PythonInstallationKey;
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use crate::libc::LibcDetectionError;
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use crate::platform::{self, Arch, Libc, Os};
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use crate::{Interpreter, PythonRequest, PythonVersion, VersionRequest};
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#[derive(Error, Debug)]
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pub enum Error {
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#[error(transparent)]
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Io(#[from] io::Error),
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#[error(transparent)]
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ImplementationError(#[from] ImplementationError),
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#[error("Expected download URL (`{0}`) to end in a supported file extension: {1}")]
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MissingExtension(String, ExtensionError),
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#[error("Invalid Python version: {0}")]
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InvalidPythonVersion(String),
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#[error("Invalid request key (too many parts): {0}")]
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TooManyParts(String),
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#[error(transparent)]
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NetworkError(#[from] WrappedReqwestError),
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#[error(transparent)]
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NetworkMiddlewareError(#[from] anyhow::Error),
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#[error("Failed to extract archive: {0}")]
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ExtractError(String, #[source] uv_extract::Error),
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#[error("Failed to hash installation")]
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HashExhaustion(#[source] io::Error),
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#[error("Hash mismatch for `{installation}`\n\nExpected:\n{expected}\n\nComputed:\n{actual}")]
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HashMismatch {
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installation: String,
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expected: String,
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actual: String,
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},
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#[error("Invalid download URL")]
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InvalidUrl(#[from] url::ParseError),
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#[error("Invalid path in file URL: `{0}`")]
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InvalidFileUrl(String),
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#[error("Failed to create download directory")]
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DownloadDirError(#[source] io::Error),
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#[error("Failed to copy to: {0}", to.user_display())]
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CopyError {
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to: PathBuf,
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#[source]
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err: io::Error,
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},
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#[error("Failed to read managed Python installation directory: {0}", dir.user_display())]
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ReadError {
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dir: PathBuf,
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#[source]
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err: io::Error,
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},
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#[error("Failed to parse request part")]
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InvalidRequestPlatform(#[from] platform::Error),
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#[error("No download found for request: {}", _0.green())]
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NoDownloadFound(PythonDownloadRequest),
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#[error(
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"A mirror was provided via `{0}`, but the URL does not match the expected format: {0}"
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)]
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Mirror(&'static str, &'static str),
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#[error(transparent)]
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LibcDetection(#[from] LibcDetectionError),
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}
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#[derive(Debug, PartialEq)]
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pub struct ManagedPythonDownload {
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key: PythonInstallationKey,
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url: &'static str,
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sha256: Option<&'static str>,
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}
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#[derive(Debug, Clone, Default, Eq, PartialEq)]
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pub struct PythonDownloadRequest {
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version: Option<VersionRequest>,
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implementation: Option<ImplementationName>,
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arch: Option<Arch>,
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os: Option<Os>,
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libc: Option<Libc>,
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}
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impl PythonDownloadRequest {
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pub fn new(
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version: Option<VersionRequest>,
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implementation: Option<ImplementationName>,
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arch: Option<Arch>,
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os: Option<Os>,
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libc: Option<Libc>,
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) -> Self {
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Self {
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version,
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implementation,
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arch,
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os,
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libc,
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}
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}
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#[must_use]
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pub fn with_implementation(mut self, implementation: ImplementationName) -> Self {
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self.implementation = Some(implementation);
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self
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}
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#[must_use]
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pub fn with_version(mut self, version: VersionRequest) -> Self {
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self.version = Some(version);
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self
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}
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#[must_use]
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pub fn with_arch(mut self, arch: Arch) -> Self {
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self.arch = Some(arch);
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self
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}
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#[must_use]
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pub fn with_os(mut self, os: Os) -> Self {
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self.os = Some(os);
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self
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}
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#[must_use]
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pub fn with_libc(mut self, libc: Libc) -> Self {
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self.libc = Some(libc);
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self
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}
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/// Construct a new [`PythonDownloadRequest`] from a [`PythonRequest`] if possible.
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///
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/// Returns [`None`] if the request kind is not compatible with a download, e.g., it is
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/// a request for a specific directory or executable name.
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pub fn from_request(request: &PythonRequest) -> Option<Self> {
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match request {
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PythonRequest::Version(version) => Some(Self::default().with_version(version.clone())),
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PythonRequest::Implementation(implementation) => {
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Some(Self::default().with_implementation(*implementation))
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}
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PythonRequest::ImplementationVersion(implementation, version) => Some(
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Self::default()
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.with_implementation(*implementation)
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.with_version(version.clone()),
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),
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PythonRequest::Key(request) => Some(request.clone()),
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PythonRequest::Any => Some(Self::default()),
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// We can't download a managed installation for these request kinds
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PythonRequest::Directory(_)
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| PythonRequest::ExecutableName(_)
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| PythonRequest::File(_) => None,
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}
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}
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/// Fill empty entries with default values.
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///
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/// Platform information is pulled from the environment.
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pub fn fill(mut self) -> Result<Self, Error> {
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if self.implementation.is_none() {
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self.implementation = Some(ImplementationName::CPython);
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}
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if self.arch.is_none() {
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self.arch = Some(Arch::from_env());
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}
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if self.os.is_none() {
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self.os = Some(Os::from_env());
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}
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if self.libc.is_none() {
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self.libc = Some(Libc::from_env()?);
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}
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Ok(self)
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}
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/// Construct a new [`PythonDownloadRequest`] with platform information from the environment.
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pub fn from_env() -> Result<Self, Error> {
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Ok(Self::new(
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None,
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None,
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Some(Arch::from_env()),
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Some(Os::from_env()),
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Some(Libc::from_env()?),
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))
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}
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pub fn implementation(&self) -> Option<&ImplementationName> {
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self.implementation.as_ref()
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}
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pub fn version(&self) -> Option<&VersionRequest> {
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self.version.as_ref()
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}
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pub fn arch(&self) -> Option<&Arch> {
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self.arch.as_ref()
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}
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pub fn os(&self) -> Option<&Os> {
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self.os.as_ref()
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}
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pub fn libc(&self) -> Option<&Libc> {
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self.libc.as_ref()
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}
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/// Iterate over all [`PythonDownload`]'s that match this request.
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pub fn iter_downloads(&self) -> impl Iterator<Item = &'static ManagedPythonDownload> + '_ {
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ManagedPythonDownload::iter_all()
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.filter(move |download| self.satisfied_by_download(download))
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}
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pub fn satisfied_by_key(&self, key: &PythonInstallationKey) -> bool {
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if let Some(arch) = &self.arch {
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if key.arch != *arch {
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return false;
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}
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}
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if let Some(os) = &self.os {
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if key.os != *os {
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return false;
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}
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}
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if let Some(libc) = &self.libc {
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if key.libc != *libc {
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return false;
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}
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}
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if let Some(implementation) = &self.implementation {
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if key.implementation != LenientImplementationName::from(*implementation) {
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return false;
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}
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}
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if let Some(version) = &self.version {
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if !version.matches_major_minor_patch(key.major, key.minor, key.patch) {
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return false;
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}
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}
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true
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}
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pub fn satisfied_by_download(&self, download: &ManagedPythonDownload) -> bool {
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self.satisfied_by_key(download.key())
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}
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pub fn satisfied_by_interpreter(&self, interpreter: &Interpreter) -> bool {
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if let Some(version) = self.version() {
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if !version.matches_interpreter(interpreter) {
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return false;
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}
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}
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if let Some(os) = self.os() {
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if &Os::from(interpreter.platform().os()) != os {
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return false;
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}
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}
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if let Some(arch) = self.arch() {
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if &Arch::from(&interpreter.platform().arch()) != arch {
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return false;
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}
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}
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if let Some(implementation) = self.implementation() {
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if LenientImplementationName::from(interpreter.implementation_name())
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!= LenientImplementationName::from(*implementation)
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{
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return false;
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}
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}
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if let Some(libc) = self.libc() {
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if &Libc::from(interpreter.platform().os()) != libc {
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return false;
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}
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}
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true
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}
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}
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impl Display for PythonDownloadRequest {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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let mut parts = Vec::new();
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if let Some(implementation) = self.implementation {
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parts.push(implementation.to_string());
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} else {
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parts.push("any".to_string());
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}
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if let Some(version) = &self.version {
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parts.push(version.to_string());
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} else {
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parts.push("any".to_string());
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}
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if let Some(os) = &self.os {
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parts.push(os.to_string());
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} else {
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parts.push("any".to_string());
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}
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if let Some(arch) = self.arch {
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parts.push(arch.to_string());
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} else {
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parts.push("any".to_string());
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}
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if let Some(libc) = self.libc {
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parts.push(libc.to_string());
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} else {
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parts.push("any".to_string());
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}
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write!(f, "{}", parts.join("-"))
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}
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}
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impl FromStr for PythonDownloadRequest {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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let mut parts = s.split('-');
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let mut version = None;
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let mut implementation = None;
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let mut os = None;
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let mut arch = None;
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let mut libc = None;
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loop {
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// Consume each part
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let Some(part) = parts.next() else { break };
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if implementation.is_none() {
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implementation = Some(ImplementationName::from_str(part)?);
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continue;
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}
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if version.is_none() {
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version = Some(
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VersionRequest::from_str(part)
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.map_err(|_| Error::InvalidPythonVersion(part.to_string()))?,
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);
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continue;
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}
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if os.is_none() {
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os = Some(Os::from_str(part)?);
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continue;
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}
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if arch.is_none() {
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arch = Some(Arch::from_str(part)?);
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continue;
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}
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if libc.is_none() {
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libc = Some(Libc::from_str(part)?);
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continue;
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}
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return Err(Error::TooManyParts(s.to_string()));
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}
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Ok(Self::new(version, implementation, arch, os, libc))
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}
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}
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include!("downloads.inc");
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pub enum DownloadResult {
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AlreadyAvailable(PathBuf),
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Fetched(PathBuf),
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}
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impl ManagedPythonDownload {
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/// Return the first [`PythonDownload`] matching a request, if any.
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pub fn from_request(
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request: &PythonDownloadRequest,
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) -> Result<&'static ManagedPythonDownload, Error> {
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request
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.iter_downloads()
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.next()
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.ok_or(Error::NoDownloadFound(request.clone()))
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}
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/// Iterate over all [`PythonDownload`]'s.
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pub fn iter_all() -> impl Iterator<Item = &'static ManagedPythonDownload> {
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PYTHON_DOWNLOADS
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.iter()
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// TODO(konsti): musl python-build-standalone builds are currently broken (statically
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// linked), so we pretend they don't exist. https://github.com/astral-sh/uv/issues/4242
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.filter(|download| download.key.libc != Libc::Some(target_lexicon::Environment::Musl))
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}
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pub fn url(&self) -> &str {
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self.url
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}
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pub fn key(&self) -> &PythonInstallationKey {
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&self.key
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}
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pub fn os(&self) -> &Os {
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self.key.os()
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}
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pub fn sha256(&self) -> Option<&str> {
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self.sha256
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}
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/// Download and extract
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#[instrument(skip(client, installation_dir, cache_dir, reporter), fields(download = % self.key()))]
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pub async fn fetch(
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&self,
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client: &uv_client::BaseClient,
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installation_dir: &Path,
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cache_dir: &Path,
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reporter: Option<&dyn Reporter>,
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) -> Result<DownloadResult, Error> {
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let url = self.download_url()?;
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let path = installation_dir.join(self.key().to_string());
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// If it already exists, return it
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if path.is_dir() {
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return Ok(DownloadResult::AlreadyAvailable(path));
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}
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let filename = url.path_segments().unwrap().last().unwrap();
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let ext = SourceDistExtension::from_path(filename)
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.map_err(|err| Error::MissingExtension(url.to_string(), err))?;
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let (reader, size) = read_url(&url, client).await?;
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let progress = reporter
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.as_ref()
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.map(|reporter| (reporter, reporter.on_download_start(&self.key, size)));
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// Download and extract into a temporary directory.
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let temp_dir = tempfile::tempdir_in(cache_dir).map_err(Error::DownloadDirError)?;
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debug!(
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"Downloading {url} to temporary location: {}",
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temp_dir.path().simplified().display()
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);
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let mut hashers = self
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.sha256
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.into_iter()
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.map(|_| Hasher::from(HashAlgorithm::Sha256))
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.collect::<Vec<_>>();
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let mut hasher = uv_extract::hash::HashReader::new(reader, &mut hashers);
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debug!("Extracting {filename}");
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match progress {
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Some((&reporter, progress)) => {
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let mut reader = ProgressReader::new(&mut hasher, progress, reporter);
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uv_extract::stream::archive(&mut reader, ext, temp_dir.path())
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.await
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.map_err(|err| Error::ExtractError(filename.to_string(), err))?;
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}
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None => {
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uv_extract::stream::archive(&mut hasher, ext, temp_dir.path())
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.await
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.map_err(|err| Error::ExtractError(filename.to_string(), err))?;
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}
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};
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|
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hasher.finish().await.map_err(Error::HashExhaustion)?;
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|
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if let Some((&reporter, progress)) = progress {
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reporter.on_progress(&self.key, progress);
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}
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|
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// Check the hash
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if let Some(expected) = self.sha256 {
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let actual = HashDigest::from(hashers.pop().unwrap()).digest;
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if !actual.eq_ignore_ascii_case(expected) {
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return Err(Error::HashMismatch {
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installation: self.key.to_string(),
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expected: expected.to_string(),
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actual: actual.to_string(),
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});
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}
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}
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|
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// Extract the top-level directory.
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let mut extracted = match uv_extract::strip_component(temp_dir.path()) {
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Ok(top_level) => top_level,
|
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Err(uv_extract::Error::NonSingularArchive(_)) => temp_dir.into_path(),
|
|
Err(err) => return Err(Error::ExtractError(filename.to_string(), err)),
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};
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|
|
// If the distribution is a `full` archive, the Python installation is in the `install` directory.
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|
if extracted.join("install").is_dir() {
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extracted = extracted.join("install");
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}
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|
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// If the distribution is missing a `python`-to-`pythonX.Y` symlink, add it. PEP 394 permits
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// it, and python-build-standalone releases after `20240726` include it, but releases prior
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// to that date do not.
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#[cfg(unix)]
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{
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match std::os::unix::fs::symlink(
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format!("python{}.{}", self.key.major, self.key.minor),
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extracted.join("bin").join("python"),
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) {
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Ok(()) => {}
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|
Err(err) if err.kind() == io::ErrorKind::AlreadyExists => {}
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Err(err) => return Err(err.into()),
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}
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}
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|
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// Persist it to the target
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debug!("Moving {} to {}", extracted.display(), path.user_display());
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rename_with_retry(extracted, &path)
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.await
|
|
.map_err(|err| Error::CopyError {
|
|
to: path.clone(),
|
|
err,
|
|
})?;
|
|
|
|
Ok(DownloadResult::Fetched(path))
|
|
}
|
|
|
|
pub fn python_version(&self) -> PythonVersion {
|
|
self.key.version()
|
|
}
|
|
|
|
/// Return the [`Url`] to use when downloading the distribution. If a mirror is set via the
|
|
/// appropriate environment variable, use it instead.
|
|
fn download_url(&self) -> Result<Url, Error> {
|
|
match self.key.implementation {
|
|
LenientImplementationName::Known(ImplementationName::CPython) => {
|
|
if let Ok(mirror) = std::env::var("UV_PYTHON_INSTALL_MIRROR") {
|
|
let Some(suffix) = self.url.strip_prefix(
|
|
"https://github.com/indygreg/python-build-standalone/releases/download/",
|
|
) else {
|
|
return Err(Error::Mirror("UV_PYTHON_INSTALL_MIRROR", self.url));
|
|
};
|
|
return Ok(Url::parse(
|
|
format!("{}/{}", mirror.trim_end_matches('/'), suffix).as_str(),
|
|
)?);
|
|
}
|
|
}
|
|
|
|
LenientImplementationName::Known(ImplementationName::PyPy) => {
|
|
if let Ok(mirror) = std::env::var("UV_PYPY_INSTALL_MIRROR") {
|
|
let Some(suffix) = self.url.strip_prefix("https://downloads.python.org/pypy/")
|
|
else {
|
|
return Err(Error::Mirror("UV_PYPY_INSTALL_MIRROR", self.url));
|
|
};
|
|
return Ok(Url::parse(
|
|
format!("{}/{}", mirror.trim_end_matches('/'), suffix).as_str(),
|
|
)?);
|
|
}
|
|
}
|
|
|
|
_ => {}
|
|
}
|
|
|
|
Ok(Url::parse(self.url)?)
|
|
}
|
|
}
|
|
|
|
impl From<reqwest::Error> for Error {
|
|
fn from(error: reqwest::Error) -> Self {
|
|
Self::NetworkError(WrappedReqwestError::from(error))
|
|
}
|
|
}
|
|
|
|
impl From<reqwest_middleware::Error> for Error {
|
|
fn from(error: reqwest_middleware::Error) -> Self {
|
|
match error {
|
|
reqwest_middleware::Error::Middleware(error) => Self::NetworkMiddlewareError(error),
|
|
reqwest_middleware::Error::Reqwest(error) => {
|
|
Self::NetworkError(WrappedReqwestError::from(error))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Display for ManagedPythonDownload {
|
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
|
write!(f, "{}", self.key)
|
|
}
|
|
}
|
|
|
|
pub trait Reporter: Send + Sync {
|
|
fn on_progress(&self, name: &PythonInstallationKey, id: usize);
|
|
fn on_download_start(&self, name: &PythonInstallationKey, size: Option<u64>) -> usize;
|
|
fn on_download_progress(&self, id: usize, inc: u64);
|
|
fn on_download_complete(&self);
|
|
}
|
|
|
|
/// An asynchronous reader that reports progress as bytes are read.
|
|
struct ProgressReader<'a, R> {
|
|
reader: R,
|
|
index: usize,
|
|
reporter: &'a dyn Reporter,
|
|
}
|
|
|
|
impl<'a, R> ProgressReader<'a, R> {
|
|
/// Create a new [`ProgressReader`] that wraps another reader.
|
|
fn new(reader: R, index: usize, reporter: &'a dyn Reporter) -> Self {
|
|
Self {
|
|
reader,
|
|
index,
|
|
reporter,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<R> AsyncRead for ProgressReader<'_, R>
|
|
where
|
|
R: AsyncRead + Unpin,
|
|
{
|
|
fn poll_read(
|
|
mut self: Pin<&mut Self>,
|
|
cx: &mut Context<'_>,
|
|
buf: &mut ReadBuf<'_>,
|
|
) -> Poll<io::Result<()>> {
|
|
Pin::new(&mut self.as_mut().reader)
|
|
.poll_read(cx, buf)
|
|
.map_ok(|()| {
|
|
self.reporter
|
|
.on_download_progress(self.index, buf.filled().len() as u64);
|
|
})
|
|
}
|
|
}
|
|
|
|
/// Convert a [`Url`] into an [`AsyncRead`] stream.
|
|
async fn read_url(
|
|
url: &Url,
|
|
client: &uv_client::BaseClient,
|
|
) -> Result<(impl AsyncRead + Unpin, Option<u64>), Error> {
|
|
if url.scheme() == "file" {
|
|
// Loads downloaded distribution from the given `file://` URL.
|
|
let path = url
|
|
.to_file_path()
|
|
.map_err(|()| Error::InvalidFileUrl(url.to_string()))?;
|
|
|
|
let size = fs_err::tokio::metadata(&path).await?.len();
|
|
let reader = fs_err::tokio::File::open(&path).await?;
|
|
|
|
Ok((Either::Left(reader), Some(size)))
|
|
} else {
|
|
let response = client.client().get(url.clone()).send().await?;
|
|
|
|
// Ensure the request was successful.
|
|
response.error_for_status_ref()?;
|
|
|
|
let size = response.content_length();
|
|
let stream = response
|
|
.bytes_stream()
|
|
.map_err(|err| io::Error::new(io::ErrorKind::Other, err))
|
|
.into_async_read();
|
|
|
|
Ok((Either::Right(stream.compat()), size))
|
|
}
|
|
}
|