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python.rs
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python.rs
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use std::collections::BTreeMap;
use std::path::{Path, PathBuf};
use eyre::{bail, eyre};
use itertools::Itertools;
use crate::backend::Backend;
use crate::build_time::built_info;
use crate::cache::{CacheManager, CacheManagerBuilder};
use crate::cli::args::BackendArg;
use crate::cmd::CmdLineRunner;
use crate::config::{Config, Settings};
use crate::file::display_path;
use crate::git::Git;
use crate::http::{HTTP, HTTP_FETCH};
use crate::install_context::InstallContext;
use crate::plugins::core::CorePlugin;
use crate::toolset::{ToolRequest, ToolVersion, Toolset};
use crate::ui::progress_report::SingleReport;
use crate::{cmd, env, file};
#[derive(Debug)]
pub struct PythonPlugin {
core: CorePlugin,
precompiled_cache: CacheManager<Vec<(String, String, String)>>,
}
impl PythonPlugin {
pub fn new() -> Self {
let core = CorePlugin::new(BackendArg::new("python", "python"));
Self {
precompiled_cache: CacheManagerBuilder::new(
core.fa.cache_path.join("precompiled.msgpack.z"),
)
.with_fresh_duration(*env::MISE_FETCH_REMOTE_VERSIONS_CACHE)
.build(),
core,
}
}
fn python_build_path(&self) -> PathBuf {
self.core.fa.cache_path.join("pyenv")
}
fn python_build_bin(&self) -> PathBuf {
self.python_build_path()
.join("plugins/python-build/bin/python-build")
}
fn install_or_update_python_build(&self) -> eyre::Result<()> {
ensure_not_windows()?;
if self.python_build_bin().exists() {
self.update_python_build()
} else {
self.install_python_build()
}
}
fn install_python_build(&self) -> eyre::Result<()> {
if self.python_build_bin().exists() {
return Ok(());
}
let settings = Settings::try_get()?;
let python_build_path = self.python_build_path();
debug!("Installing python-build to {}", python_build_path.display());
file::remove_all(&python_build_path)?;
file::create_dir_all(self.python_build_path().parent().unwrap())?;
let git = Git::new(self.python_build_path());
git.clone(&settings.python_pyenv_repo)?;
Ok(())
}
fn update_python_build(&self) -> eyre::Result<()> {
// TODO: do not update if recently updated
debug!(
"Updating python-build in {}",
self.python_build_path().display()
);
let git = Git::new(self.python_build_path());
CorePlugin::run_fetch_task_with_timeout(move || git.update(None))?;
Ok(())
}
fn fetch_remote_versions(&self) -> eyre::Result<Vec<String>> {
match self.core.fetch_remote_versions_from_mise() {
Ok(Some(versions)) => return Ok(versions),
Ok(None) => {}
Err(e) => warn!("failed to fetch remote versions: {}", e),
}
self.install_or_update_python_build()?;
let python_build_bin = self.python_build_bin();
CorePlugin::run_fetch_task_with_timeout(move || {
let output = cmd!(python_build_bin, "--definitions").read()?;
let versions = output
.split('\n')
.map(|s| s.to_string())
.sorted_by_cached_key(|v| regex!(r"^\d+").is_match(v))
.collect();
Ok(versions)
})
}
fn python_path(&self, tv: &ToolVersion) -> PathBuf {
if cfg!(windows) {
tv.install_path().join("python.exe")
} else {
tv.install_path().join("bin/python")
}
}
fn fetch_precompiled_remote_versions(&self) -> eyre::Result<&Vec<(String, String, String)>> {
self.precompiled_cache.get_or_try_init(|| {
let settings = Settings::get();
let raw = match settings.paranoid {
true => HTTP_FETCH.get_text("https://mise-versions.jdx.dev/python-precompiled"),
// using http is not a security concern and enabling tls makes mise significantly slower
false => HTTP_FETCH.get_text("http://mise-versions.jdx.dev/python-precompiled"),
}?;
let platform = format!("{}-{}", python_arch(&settings), python_os(&settings));
let versions = raw
.lines()
.filter(|v| v.contains(&platform))
.flat_map(|v| {
regex!(r"^cpython-(\d+\.\d+\.\d+)\+(\d+).*")
.captures(v)
.map(|caps| {
(
caps[1].to_string(),
caps[2].to_string(),
caps[0].to_string(),
)
})
})
.collect_vec();
Ok(versions)
})
}
fn install_precompiled(&self, ctx: &InstallContext) -> eyre::Result<()> {
let precompiled_versions = self.fetch_precompiled_remote_versions()?;
let precompile_info = precompiled_versions
.iter()
.rev()
.find(|(v, _, _)| &ctx.tv.version == v);
let (tag, filename) = match precompile_info {
Some((_, tag, filename)) => (tag, filename),
None => {
if cfg!(windows) || Settings::get().python_compile == Some(false) {
if !cfg!(windows) {
hint!(
"python_compile",
"To compile python from source, run",
"mise settings set python_compile 1"
);
}
bail!(
"no precompiled python found for {} on {}-{}",
ctx.tv.version,
python_arch(&Settings::get()),
python_os(&Settings::get()),
);
}
debug!("no precompiled python found for {}", ctx.tv.version);
let mut available = precompiled_versions.iter().map(|(v, _, _)| v);
trace!("available precompiled versions: {}", available.join(", "));
return self.install_compiled(ctx);
}
};
if cfg!(unix) {
hint!(
"python_precompiled",
"installing precompiled python from indygreg/python-build-standalone\n\
if you experience issues with this python (e.g.: running poetry), switch to python-build by running",
"mise settings set python_compile 1"
);
}
let url = format!(
"https://github.com/indygreg/python-build-standalone/releases/download/{tag}/{filename}"
);
let filename = url.split('/').last().unwrap();
let install = ctx.tv.install_path();
let download = ctx.tv.download_path();
let tarball_path = download.join(filename);
ctx.pr.set_message(format!("downloading {filename}"));
HTTP.download_file(&url, &tarball_path, Some(ctx.pr.as_ref()))?;
ctx.pr.set_message(format!("installing {filename}"));
file::untar(&tarball_path, &download)?;
file::remove_all(&install)?;
file::rename(download.join("python"), &install)?;
#[cfg(unix)]
file::make_symlink(&install.join("bin/python3"), &install.join("bin/python"))?;
Ok(())
}
fn install_compiled(&self, ctx: &InstallContext) -> eyre::Result<()> {
let config = Config::get();
let settings = Settings::get();
self.install_or_update_python_build()?;
if matches!(&ctx.tv.request, ToolRequest::Ref { .. }) {
return Err(eyre!("Ref versions not supported for python"));
}
ctx.pr.set_message("Running python-build".into());
let mut cmd = CmdLineRunner::new(self.python_build_bin())
.with_pr(ctx.pr.as_ref())
.arg(ctx.tv.version.as_str())
.arg(ctx.tv.install_path())
.env("PIP_REQUIRE_VIRTUALENV", "false")
.envs(config.env()?);
if settings.verbose {
cmd = cmd.arg("--verbose");
}
if let Some(patch_url) = &settings.python_patch_url {
ctx.pr
.set_message(format!("with patch file from: {patch_url}"));
let patch = HTTP.get_text(patch_url)?;
cmd = cmd.arg("--patch").stdin_string(patch)
}
if let Some(patches_dir) = &settings.python_patches_directory {
let patch_file = patches_dir.join(format!("{}.patch", &ctx.tv.version));
if patch_file.exists() {
ctx.pr
.set_message(format!("with patch file: {}", patch_file.display()));
let contents = file::read_to_string(&patch_file)?;
cmd = cmd.arg("--patch").stdin_string(contents);
} else {
warn!("patch file not found: {}", patch_file.display());
}
}
cmd.execute()?;
Ok(())
}
fn install_default_packages(
&self,
config: &Config,
packages_file: &Path,
tv: &ToolVersion,
pr: &dyn SingleReport,
) -> eyre::Result<()> {
if !packages_file.exists() {
return Ok(());
}
pr.set_message("installing default packages".into());
CmdLineRunner::new(tv.install_path().join("bin/python"))
.with_pr(pr)
.arg("-m")
.arg("pip")
.arg("install")
.arg("--upgrade")
.arg("-r")
.arg(packages_file)
.env("PIP_REQUIRE_VIRTUALENV", "false")
.envs(config.env()?)
.execute()
}
fn get_virtualenv(
&self,
config: &Config,
tv: &ToolVersion,
pr: Option<&dyn SingleReport>,
) -> eyre::Result<Option<PathBuf>> {
if let Some(virtualenv) = tv.request.options().get("virtualenv") {
let settings = Settings::try_get()?;
if !settings.experimental {
warn!(
"please enable experimental mode with `mise settings set experimental true` \
to use python virtualenv activation"
);
}
let mut virtualenv: PathBuf = file::replace_path(Path::new(virtualenv));
if !virtualenv.is_absolute() {
// TODO: use the path of the config file that specified python, not the top one like this
if let Some(project_root) = &config.project_root {
virtualenv = project_root.join(virtualenv);
}
}
if !virtualenv.exists() {
if settings.python_venv_auto_create {
info!("setting up virtualenv at: {}", virtualenv.display());
let mut cmd = CmdLineRunner::new(self.python_path(tv))
.arg("-m")
.arg("venv")
.arg(&virtualenv)
.envs(config.env()?);
if let Some(pr) = pr {
cmd = cmd.with_pr(pr);
}
cmd.execute()?;
} else {
warn!(
"no venv found at: {p}\n\n\
To create a virtualenv manually, run:\n\
python -m venv {p}",
p = display_path(&virtualenv)
);
return Ok(None);
}
}
// TODO: enable when it is more reliable
// self.check_venv_python(&virtualenv, tv)?;
Ok(Some(virtualenv))
} else {
Ok(None)
}
}
// fn check_venv_python(&self, virtualenv: &Path, tv: &ToolVersion) -> eyre::Result<()> {
// let symlink = virtualenv.join("bin/python");
// let target = self.python_path(tv);
// let symlink_target = symlink.read_link().unwrap_or_default();
// ensure!(
// symlink_target == target,
// "expected venv {} to point to {}.\nTry deleting the venv at {}.",
// display_path(&symlink),
// display_path(&target),
// display_path(virtualenv)
// );
// Ok(())
// }
fn test_python(
&self,
config: &Config,
tv: &ToolVersion,
pr: &dyn SingleReport,
) -> eyre::Result<()> {
pr.set_message("python --version".into());
CmdLineRunner::new(self.python_path(tv))
.with_pr(pr)
.arg("--version")
.envs(config.env()?)
.execute()
}
}
impl Backend for PythonPlugin {
fn fa(&self) -> &BackendArg {
&self.core.fa
}
fn _list_remote_versions(&self) -> eyre::Result<Vec<String>> {
if Settings::get().python_compile == Some(false) {
Ok(self
.fetch_precompiled_remote_versions()?
.iter()
.map(|(v, _, _)| v.clone())
.collect())
} else {
self.core
.remote_version_cache
.get_or_try_init(|| self.fetch_remote_versions())
.cloned()
}
}
#[cfg(windows)]
fn list_bin_paths(&self, tv: &ToolVersion) -> eyre::Result<Vec<PathBuf>> {
Ok(vec![tv.install_path()])
}
fn legacy_filenames(&self) -> eyre::Result<Vec<String>> {
Ok(vec![".python-version".to_string()])
}
fn install_version_impl(&self, ctx: &InstallContext) -> eyre::Result<()> {
let config = Config::get();
let settings = Settings::try_get()?;
if cfg!(windows) || settings.python_compile == Some(true) {
self.install_compiled(ctx)?;
} else {
self.install_precompiled(ctx)?;
}
self.test_python(&config, &ctx.tv, ctx.pr.as_ref())?;
if let Err(e) = self.get_virtualenv(&config, &ctx.tv, Some(ctx.pr.as_ref())) {
warn!("failed to get virtualenv: {e:#}");
}
if let Some(default_file) = &settings.python_default_packages_file {
if let Err(err) =
self.install_default_packages(&config, default_file, &ctx.tv, ctx.pr.as_ref())
{
warn!("failed to install default python packages: {err:#}");
}
}
Ok(())
}
fn exec_env(
&self,
config: &Config,
_ts: &Toolset,
tv: &ToolVersion,
) -> eyre::Result<BTreeMap<String, String>> {
let mut hm = BTreeMap::new();
match self.get_virtualenv(config, tv, None) {
Err(e) => warn!("failed to get virtualenv: {e}"),
Ok(Some(virtualenv)) => {
let bin = virtualenv.join("bin");
hm.insert("VIRTUAL_ENV".into(), virtualenv.to_string_lossy().into());
hm.insert("MISE_ADD_PATH".into(), bin.to_string_lossy().into());
}
Ok(None) => {}
};
Ok(hm)
}
}
fn python_os(settings: &Settings) -> String {
if let Some(os) = &settings.python_precompiled_os {
return os.clone();
}
if cfg!(windows) {
"pc-windows-msvc-shared-install_only_stripped".into()
} else if cfg!(target_os = "macos") {
"apple-darwin".into()
} else {
let os = &built_info::CFG_OS;
let env = &built_info::CFG_ENV;
format!("unknown-{os}-{env}")
}
}
fn python_arch(settings: &Settings) -> &str {
if let Some(arch) = &settings.python_precompiled_arch {
return arch.as_str();
}
if cfg!(windows) {
"x86_64"
} else if cfg!(all(target_os = "linux", target_arch = "x86_64")) {
if cfg!(target_feature = "avx512f") {
"x86_64_v4"
} else if cfg!(target_feature = "avx2") {
"x86_64_v3"
} else if cfg!(target_feature = "sse4.1") {
"x86_64_v2"
} else {
"x86_64"
}
} else {
built_info::CFG_TARGET_ARCH
}
}
fn ensure_not_windows() -> eyre::Result<()> {
if cfg!(windows) {
bail!("python can not currently be compiled on windows");
}
Ok(())
}