Sync env vars with uv-static crate 🧹 (#10016)

## Summary

Updates some env vars references to use `EnvVars` accordingly.

crates/uv-cli/src/lib.rs

@@ -4300,7 +4300,7 @@ pub struct PythonInstallArgs {
     ///
     /// See `uv python dir` to view the current Python installation directory. Defaults to
     /// `~/.local/share/uv/python`.
-    #[arg(long, short, env = "UV_PYTHON_INSTALL_DIR")]
+    #[arg(long, short, env = EnvVars::UV_PYTHON_INSTALL_DIR)]
     pub install_dir: Option<PathBuf>,
 
     /// The Python version(s) to install.
@@ -4363,7 +4363,7 @@ pub struct PythonInstallArgs {
 #[allow(clippy::struct_excessive_bools)]
 pub struct PythonUninstallArgs {
     /// The directory where the Python was installed.
-    #[arg(long, short, env = "UV_PYTHON_INSTALL_DIR")]
+    #[arg(long, short, env = EnvVars::UV_PYTHON_INSTALL_DIR)]
     pub install_dir: Option<PathBuf>,
 
     /// The Python version(s) to uninstall.

crates/uv-static/src/env_vars.rs

@@ -539,6 +539,14 @@ impl EnvVars {
     #[attr_hidden]
     pub const KEYRING_TEST_CREDENTIALS: &'static str = "KEYRING_TEST_CREDENTIALS";
 
+    /// Used to set the vendor links url for tests.
+    #[attr_hidden]
+    pub const UV_TEST_VENDOR_LINKS_URL: &'static str = "UV_TEST_VENDOR_LINKS_URL";
+
+    /// Used to set an index url for tests.
+    #[attr_hidden]
+    pub const UV_TEST_INDEX_URL: &'static str = "UV_TEST_INDEX_URL";
+
     /// `.env` files from which to load environment variables when executing `uv run` commands.
     pub const UV_ENV_FILE: &'static str = "UV_ENV_FILE";
 

crates/uv/tests/it/common/mod.rs

@@ -37,13 +37,15 @@ pub const PACKSE_VERSION: &str = "0.3.42";
 /// Using a find links url allows using `--index-url` instead of `--extra-index-url` in tests
 /// to prevent dependency confusion attacks against our test suite.
 pub fn build_vendor_links_url() -> String {
-    env::var("UV_TEST_VENDOR_LINKS_URL").ok().unwrap_or(format!(
-        "https://raw.githubusercontent.com/astral-sh/packse/{PACKSE_VERSION}/vendor/links.html"
-    ))
+    env::var(EnvVars::UV_TEST_VENDOR_LINKS_URL)
+        .ok()
+        .unwrap_or(format!(
+            "https://raw.githubusercontent.com/astral-sh/packse/{PACKSE_VERSION}/vendor/links.html"
+        ))
 }
 
 pub fn packse_index_url() -> String {
-    env::var("UV_TEST_INDEX_URL").ok().unwrap_or(format!(
+    env::var(EnvVars::UV_TEST_INDEX_URL).ok().unwrap_or(format!(
         "https://astral-sh.github.io/packse/{PACKSE_VERSION}/simple-html/"
     ))
 }

crates/uv/tests/it/python_find.rs

@@ -593,7 +593,7 @@ fn python_find_venv_invalid() {
     "###);
 
     // Unless the virtual environment is not active
-    uv_snapshot!(context.filters(), context.python_find().env_remove("VIRTUAL_ENV"), @r###"
+    uv_snapshot!(context.filters(), context.python_find().env_remove(EnvVars::VIRTUAL_ENV), @r###"
     success: true
     exit_code: 0
     ----- stdout -----

crates/uv/tests/it/run.rs

@@ -3173,7 +3173,7 @@ fn run_with_multiple_env_files() -> Result<()> {
     ----- stderr -----
     "###);
 
-    uv_snapshot!(context.filters(), context.run().arg("test.py").env("UV_ENV_FILE", ".env1 .env2"), @r###"
+    uv_snapshot!(context.filters(), context.run().arg("test.py").env(EnvVars::UV_ENV_FILE, ".env1 .env2"), @r###"
     success: false
     exit_code: 2
     ----- stdout -----

crates/uv/tests/it/show_settings.rs

@@ -5556,7 +5556,7 @@ fn verify_hashes() -> anyhow::Result<()> {
     uv_snapshot!(context.filters(), add_shared_args(context.pip_install(), context.temp_dir.path())
         .arg("-r")
         .arg("requirements.in")
-        .env("UV_NO_VERIFY_HASHES", "1")
+        .env(EnvVars::UV_NO_VERIFY_HASHES, "1")
         .arg("--show-settings"), @r###"
     success: true
     exit_code: 0

crates/uv/tests/it/venv.rs

@@ -1117,7 +1117,7 @@ fn create_venv_apostrophe() {
 
     // One of them should be commonly available on a linux developer machine, if not, we have to
     // extend the fallbacks.
-    let shell = env::var_os("SHELL").unwrap_or(OsString::from("bash"));
+    let shell = env::var_os(EnvVars::SHELL).unwrap_or(OsString::from("bash"));
     let mut child = Command::new(shell)
         .stdin(Stdio::piped())
         .stdout(Stdio::piped())