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Allow disabling reading the system config with UV_NO_SYSTEM_CONFIG #19476

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Merged
EliteTK merged 4 commits into from
May 20, 2026
Merged

Allow disabling reading the system config with UV_NO_SYSTEM_CONFIG #19476

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9e970be
Allow disabling reading the system config with `UV_NO_SYSTEM_CONFIG`
zanieb May 19, 2026
9459aea
Fix system config snapshot expectations
zanieb May 19, 2026
669b515
Apply suggestion from @zanieb
zanieb May 20, 2026
09046da
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zanieb May 20, 2026
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4 changes: 4 additions & 0 deletions crates/uv-settings/src/lib.rs
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Expand Up @@ -76,6 +76,10 @@ impl FilesystemOptions {
}

pub fn system() -> Result<Option<Self>, Error> {
if parse_boolish_environment_variable(EnvVars::UV_NO_SYSTEM_CONFIG)? == Some(true) {
return Ok(None);
}

let Some(file) = system_config_file() else {
return Ok(None);
};
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4 changes: 4 additions & 0 deletions crates/uv-static/src/env_vars.rs
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Expand Up @@ -187,6 +187,10 @@ impl EnvVars {
#[attr_added_in("0.2.30")]
pub const UV_NO_CONFIG: &'static str = "UV_NO_CONFIG";

/// If set, uv will not read system-level configuration files.
#[attr_added_in("0.11.15")]
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pub const UV_NO_SYSTEM_CONFIG: &'static str = "UV_NO_SYSTEM_CONFIG";

/// Equivalent to the `--isolated` command-line argument. If set, uv will avoid discovering
/// a `pyproject.toml` or `uv.toml` file.
#[attr_added_in("0.8.14")]
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