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uv_static/
env_vars.rs

1//! Environment variables used or supported by uv.
2//! Used to generate `docs/reference/environment.md`.
3use uv_macros::{attr_added_in, attr_env_var_pattern, attr_hidden, attribute_env_vars_metadata};
4
5/// Declares all environment variable used throughout `uv` and its crates.
6pub struct EnvVars;
7
8#[attribute_env_vars_metadata]
9impl EnvVars {
10    /// The path to the binary that was used to invoke uv.
11    ///
12    /// This is propagated to all subprocesses spawned by uv.
13    ///
14    /// If the executable was invoked through a symbolic link, some platforms will return the path
15    /// of the symbolic link and other platforms will return the path of the symbolic link’s target.
16    ///
17    /// See <https://doc.rust-lang.org/std/env/fn.current_exe.html#security> for security
18    /// considerations.
19    #[attr_added_in("0.6.0")]
20    pub const UV: &'static str = "UV";
21
22    /// The path to the Ruff binary used by `uv format`.
23    #[attr_added_in("0.11.22")]
24    pub const RUFF: &'static str = "RUFF";
25
26    /// The path to the ty binary used by `uv check`.
27    #[attr_added_in("0.11.22")]
28    pub const TY: &'static str = "TY";
29
30    /// Equivalent to the `--offline` command-line argument. If set, uv will disable network access.
31    #[attr_added_in("0.5.9")]
32    pub const UV_OFFLINE: &'static str = "UV_OFFLINE";
33
34    /// Equivalent to the `--default-index` command-line argument. If set, uv will use
35    /// this URL as the default index when searching for packages.
36    #[attr_added_in("0.4.23")]
37    pub const UV_DEFAULT_INDEX: &'static str = "UV_DEFAULT_INDEX";
38
39    /// Equivalent to the `--index` command-line argument. If set, uv will use this
40    /// space-separated list of URLs as additional indexes when searching for packages.
41    #[attr_added_in("0.4.23")]
42    pub const UV_INDEX: &'static str = "UV_INDEX";
43
44    /// Equivalent to the `--index-url` command-line argument. If set, uv will use this
45    /// URL as the default index when searching for packages.
46    /// (Deprecated: use `UV_DEFAULT_INDEX` instead.)
47    #[attr_added_in("0.0.5")]
48    pub const UV_INDEX_URL: &'static str = "UV_INDEX_URL";
49
50    /// Equivalent to the `--extra-index-url` command-line argument. If set, uv will
51    /// use this space-separated list of URLs as additional indexes when searching for packages.
52    /// (Deprecated: use `UV_INDEX` instead.)
53    #[attr_added_in("0.1.3")]
54    pub const UV_EXTRA_INDEX_URL: &'static str = "UV_EXTRA_INDEX_URL";
55
56    /// Equivalent to the `--find-links` command-line argument. If set, uv will use this
57    /// comma-separated list of additional locations to search for packages.
58    #[attr_added_in("0.4.19")]
59    pub const UV_FIND_LINKS: &'static str = "UV_FIND_LINKS";
60
61    /// Equivalent to the `--no-sources` command-line argument. If set, uv will ignore
62    /// `[tool.uv.sources]` annotations when resolving dependencies.
63    #[attr_added_in("0.9.8")]
64    pub const UV_NO_SOURCES: &'static str = "UV_NO_SOURCES";
65
66    /// Equivalent to the `--cache-dir` command-line argument. If set, uv will use this
67    /// directory for caching instead of the default cache directory.
68    #[attr_added_in("0.0.5")]
69    pub const UV_CACHE_DIR: &'static str = "UV_CACHE_DIR";
70
71    /// The directory for storage of credentials when using a plain text backend.
72    #[attr_added_in("0.8.15")]
73    pub const UV_CREDENTIALS_DIR: &'static str = "UV_CREDENTIALS_DIR";
74
75    /// Equivalent to the `--no-cache` command-line argument. If set, uv will not use the
76    /// cache for any operations.
77    #[attr_added_in("0.1.2")]
78    pub const UV_NO_CACHE: &'static str = "UV_NO_CACHE";
79
80    /// Equivalent to the `--resolution` command-line argument. For example, if set to
81    /// `lowest-direct`, uv will install the lowest compatible versions of all direct dependencies.
82    #[attr_added_in("0.1.27")]
83    pub const UV_RESOLUTION: &'static str = "UV_RESOLUTION";
84
85    /// Equivalent to the `--prerelease` command-line argument. For example, if set to
86    /// `allow`, uv will allow pre-release versions for all dependencies.
87    #[attr_added_in("0.1.16")]
88    pub const UV_PRERELEASE: &'static str = "UV_PRERELEASE";
89
90    /// Equivalent to the `--fork-strategy` argument. Controls version selection during universal
91    /// resolution.
92    #[attr_added_in("0.5.9")]
93    pub const UV_FORK_STRATEGY: &'static str = "UV_FORK_STRATEGY";
94
95    /// Equivalent to the `--system` command-line argument. If set to `true`, uv will
96    /// use the first Python interpreter found in the system `PATH`.
97    ///
98    /// WARNING: `UV_SYSTEM_PYTHON=true` is intended for use in continuous integration (CI)
99    /// or containerized environments and should be used with caution, as modifying the system
100    /// Python can lead to unexpected behavior.
101    #[attr_added_in("0.1.18")]
102    pub const UV_SYSTEM_PYTHON: &'static str = "UV_SYSTEM_PYTHON";
103
104    /// Equivalent to the `--python` command-line argument. If set to a path, uv will use
105    /// this Python interpreter for all operations.
106    #[attr_added_in("0.1.40")]
107    pub const UV_PYTHON: &'static str = "UV_PYTHON";
108
109    /// Equivalent to the `--break-system-packages` command-line argument. If set to `true`,
110    /// uv will allow the installation of packages that conflict with system-installed packages.
111    ///
112    /// WARNING: `UV_BREAK_SYSTEM_PACKAGES=true` is intended for use in continuous integration
113    /// (CI) or containerized environments and should be used with caution, as modifying the system
114    /// Python can lead to unexpected behavior.
115    #[attr_added_in("0.1.32")]
116    pub const UV_BREAK_SYSTEM_PACKAGES: &'static str = "UV_BREAK_SYSTEM_PACKAGES";
117
118    /// Equivalent to the `--native-tls` command-line argument. If set to `true`, uv will
119    /// load TLS certificates from the platform's native certificate store instead of the
120    /// bundled Mozilla root certificates.
121    /// (Deprecated: use `UV_SYSTEM_CERTS` instead.)
122    #[attr_added_in("0.1.19")]
123    pub const UV_NATIVE_TLS: &'static str = "UV_NATIVE_TLS";
124
125    /// Equivalent to the `--system-certs` command-line argument. If set to `true`, uv will
126    /// load TLS certificates from the platform's native certificate store instead of the
127    /// bundled Mozilla root certificates.
128    #[attr_added_in("0.11.0")]
129    pub const UV_SYSTEM_CERTS: &'static str = "UV_SYSTEM_CERTS";
130
131    /// Equivalent to the `--index-strategy` command-line argument.
132    ///
133    /// For example, if set to `unsafe-best-match`, uv will consider versions of a given package
134    /// available across all index URLs, rather than limiting its search to the first index URL
135    /// that contains the package.
136    #[attr_added_in("0.1.29")]
137    pub const UV_INDEX_STRATEGY: &'static str = "UV_INDEX_STRATEGY";
138
139    /// Equivalent to the `--require-hashes` command-line argument. If set to `true`,
140    /// uv will require that all dependencies have a hash specified in the requirements file.
141    #[attr_added_in("0.1.34")]
142    pub const UV_REQUIRE_HASHES: &'static str = "UV_REQUIRE_HASHES";
143
144    /// Equivalent to the `--constraints` command-line argument. If set, uv will use this
145    /// file as the constraints file. Uses space-separated list of files.
146    #[attr_added_in("0.1.36")]
147    pub const UV_CONSTRAINT: &'static str = "UV_CONSTRAINT";
148
149    /// Equivalent to the `--build-constraints` command-line argument. If set, uv will use this file
150    /// as constraints for any source distribution builds. Uses space-separated list of files.
151    #[attr_added_in("0.2.34")]
152    pub const UV_BUILD_CONSTRAINT: &'static str = "UV_BUILD_CONSTRAINT";
153
154    /// Equivalent to the `--overrides` command-line argument. If set, uv will use this file
155    /// as the overrides file. Uses space-separated list of files.
156    #[attr_added_in("0.2.22")]
157    pub const UV_OVERRIDE: &'static str = "UV_OVERRIDE";
158
159    /// Equivalent to the `--excludes` command-line argument. If set, uv will use this
160    /// as the excludes file. Uses space-separated list of files.
161    #[attr_added_in("0.9.8")]
162    pub const UV_EXCLUDE: &'static str = "UV_EXCLUDE";
163
164    /// Equivalent to the `--link-mode` command-line argument. If set, uv will use this as
165    /// a link mode.
166    #[attr_added_in("0.1.40")]
167    pub const UV_LINK_MODE: &'static str = "UV_LINK_MODE";
168
169    /// Equivalent to the `--no-build-isolation` command-line argument. If set, uv will
170    /// skip isolation when building source distributions.
171    #[attr_added_in("0.1.40")]
172    pub const UV_NO_BUILD_ISOLATION: &'static str = "UV_NO_BUILD_ISOLATION";
173
174    /// Equivalent to the `--custom-compile-command` command-line argument.
175    ///
176    /// Used to override uv in the output header of the `requirements.txt` files generated by
177    /// `uv pip compile`. Intended for use-cases in which `uv pip compile` is called from within a wrapper
178    /// script, to include the name of the wrapper script in the output file.
179    #[attr_added_in("0.1.23")]
180    pub const UV_CUSTOM_COMPILE_COMMAND: &'static str = "UV_CUSTOM_COMPILE_COMMAND";
181
182    /// Equivalent to the `--keyring-provider` command-line argument. If set, uv
183    /// will use this value as the keyring provider.
184    #[attr_added_in("0.1.19")]
185    pub const UV_KEYRING_PROVIDER: &'static str = "UV_KEYRING_PROVIDER";
186
187    /// Equivalent to the `--config-file` command-line argument. Expects a path to a
188    /// local `uv.toml` file to use as the configuration file.
189    #[attr_added_in("0.1.34")]
190    pub const UV_CONFIG_FILE: &'static str = "UV_CONFIG_FILE";
191
192    /// Equivalent to the `--no-config` command-line argument. If set, uv will not read
193    /// any configuration files from the current directory, parent directories, or user configuration
194    /// directories.
195    #[attr_added_in("0.2.30")]
196    pub const UV_NO_CONFIG: &'static str = "UV_NO_CONFIG";
197
198    /// If set, uv will not read system-level configuration files.
199    #[attr_added_in("0.11.16")]
200    pub const UV_NO_SYSTEM_CONFIG: &'static str = "UV_NO_SYSTEM_CONFIG";
201
202    /// Equivalent to the `--isolated` command-line argument. If set, uv will avoid discovering
203    /// a `pyproject.toml` or `uv.toml` file.
204    #[attr_added_in("0.8.14")]
205    pub const UV_ISOLATED: &'static str = "UV_ISOLATED";
206
207    /// Equivalent to the `--exclude-newer` command-line argument. If set, uv will
208    /// exclude distributions published after the specified date. Set to `false` to disable
209    /// `exclude-newer`.
210    #[attr_added_in("0.2.12")]
211    pub const UV_EXCLUDE_NEWER: &'static str = "UV_EXCLUDE_NEWER";
212
213    /// Whether uv should prefer system or managed Python versions.
214    #[attr_added_in("0.3.2")]
215    pub const UV_PYTHON_PREFERENCE: &'static str = "UV_PYTHON_PREFERENCE";
216
217    /// Require use of uv-managed Python versions.
218    #[attr_added_in("0.6.8")]
219    pub const UV_MANAGED_PYTHON: &'static str = "UV_MANAGED_PYTHON";
220
221    /// Disable use of uv-managed Python versions.
222    #[attr_added_in("0.6.8")]
223    pub const UV_NO_MANAGED_PYTHON: &'static str = "UV_NO_MANAGED_PYTHON";
224
225    /// Equivalent to the
226    /// [`python-downloads`](../reference/settings.md#python-downloads) setting and, when disabled, the
227    /// `--no-python-downloads` option. Whether uv should allow Python downloads.
228    #[attr_added_in("0.3.2")]
229    pub const UV_PYTHON_DOWNLOADS: &'static str = "UV_PYTHON_DOWNLOADS";
230
231    /// Overrides the environment-determined libc on linux systems when filling in the current platform
232    /// within Python version requests. Options are: `gnu`, `gnueabi`, `gnueabihf`, `musl`,
233    /// `musleabi`, `musleabihf`, and `none`.
234    #[attr_added_in("0.7.22")]
235    pub const UV_LIBC: &'static str = "UV_LIBC";
236
237    /// Equivalent to the `--compile-bytecode` command-line argument. If set, uv
238    /// will compile Python source files to bytecode after installation.
239    #[attr_added_in("0.3.3")]
240    pub const UV_COMPILE_BYTECODE: &'static str = "UV_COMPILE_BYTECODE";
241
242    /// Timeout (in seconds) for bytecode compilation.
243    #[attr_added_in("0.7.22")]
244    pub const UV_COMPILE_BYTECODE_TIMEOUT: &'static str = "UV_COMPILE_BYTECODE_TIMEOUT";
245
246    /// Equivalent to the `--no-editable` command-line argument. If set, uv
247    /// installs or exports any editable dependencies, including the project and any workspace
248    /// members, as non-editable.
249    #[attr_added_in("0.6.15")]
250    pub const UV_NO_EDITABLE: &'static str = "UV_NO_EDITABLE";
251
252    /// Equivalent to the `--dev` command-line argument. If set, uv will include
253    /// development dependencies.
254    #[attr_added_in("0.8.7")]
255    pub const UV_DEV: &'static str = "UV_DEV";
256
257    /// Equivalent to the `--no-dev` command-line argument. If set, uv will exclude
258    /// development dependencies.
259    #[attr_added_in("0.8.7")]
260    pub const UV_NO_DEV: &'static str = "UV_NO_DEV";
261
262    /// Equivalent to the `--no-group` command-line argument. If set, uv will disable
263    /// the specified dependency groups for the given space-delimited list of packages.
264    #[attr_added_in("0.9.8")]
265    pub const UV_NO_GROUP: &'static str = "UV_NO_GROUP";
266
267    /// Equivalent to the `--no-default-groups` command-line argument. If set, uv will
268    /// not select the default dependency groups defined in `tool.uv.default-groups`.
269    #[attr_added_in("0.9.9")]
270    pub const UV_NO_DEFAULT_GROUPS: &'static str = "UV_NO_DEFAULT_GROUPS";
271
272    /// Equivalent to the `--no-install-project` command-line argument. If set, uv will
273    /// install the project's dependencies but not the project itself.
274    #[attr_added_in("0.11.20")]
275    pub const UV_NO_INSTALL_PROJECT: &'static str = "UV_NO_INSTALL_PROJECT";
276
277    /// Equivalent to the `--no-install-workspace` command-line argument. If set, uv will
278    /// install workspace dependencies but not workspace members (including the current
279    /// project).
280    #[attr_added_in("0.11.20")]
281    pub const UV_NO_INSTALL_WORKSPACE: &'static str = "UV_NO_INSTALL_WORKSPACE";
282
283    /// Equivalent to the `--no-install-local` command-line argument. If set, uv will skip
284    /// the current project, workspace members, and any other local (path or editable)
285    /// packages, installing only remote dependencies.
286    #[attr_added_in("0.11.20")]
287    pub const UV_NO_INSTALL_LOCAL: &'static str = "UV_NO_INSTALL_LOCAL";
288
289    /// Equivalent to the hidden `--only-install-project` command-line argument.
290    #[attr_hidden]
291    #[attr_added_in("0.11.20")]
292    pub const UV_ONLY_INSTALL_PROJECT: &'static str = "UV_ONLY_INSTALL_PROJECT";
293
294    /// Equivalent to the hidden `--only-install-workspace` command-line argument.
295    #[attr_hidden]
296    #[attr_added_in("0.11.20")]
297    pub const UV_ONLY_INSTALL_WORKSPACE: &'static str = "UV_ONLY_INSTALL_WORKSPACE";
298
299    /// Equivalent to the hidden `--only-install-local` command-line argument.
300    #[attr_hidden]
301    #[attr_added_in("0.11.20")]
302    pub const UV_ONLY_INSTALL_LOCAL: &'static str = "UV_ONLY_INSTALL_LOCAL";
303
304    /// Equivalent to the `--no-binary` command-line argument. If set, uv will install
305    /// all packages from source. The resolver will still use pre-built wheels to
306    /// extract package metadata, if available.
307    #[attr_added_in("0.5.30")]
308    pub const UV_NO_BINARY: &'static str = "UV_NO_BINARY";
309
310    /// Equivalent to the `--no-binary-package` command line argument. If set, uv will
311    /// not use pre-built wheels for the given space-delimited list of packages.
312    #[attr_added_in("0.5.30")]
313    pub const UV_NO_BINARY_PACKAGE: &'static str = "UV_NO_BINARY_PACKAGE";
314
315    /// Equivalent to the `--no-build` command-line argument. If set, uv will not build
316    /// source distributions.
317    #[attr_added_in("0.1.40")]
318    pub const UV_NO_BUILD: &'static str = "UV_NO_BUILD";
319
320    /// Equivalent to the `--no-build-package` command line argument. If set, uv will
321    /// not build source distributions for the given space-delimited list of packages.
322    #[attr_added_in("0.6.5")]
323    pub const UV_NO_BUILD_PACKAGE: &'static str = "UV_NO_BUILD_PACKAGE";
324
325    /// Equivalent to the `--no-sources-package` command line argument. If set, uv will
326    /// ignore the `tool.uv.sources` table for the given space-delimited list of packages.
327    #[attr_added_in("0.9.26")]
328    pub const UV_NO_SOURCES_PACKAGE: &'static str = "UV_NO_SOURCES_PACKAGE";
329
330    /// Equivalent to the `--publish-url` command-line argument. The URL of the upload
331    /// endpoint of the index to use with `uv publish`.
332    #[attr_added_in("0.4.16")]
333    pub const UV_PUBLISH_URL: &'static str = "UV_PUBLISH_URL";
334
335    /// Equivalent to the `--token` command-line argument in `uv publish`. If set, uv
336    /// will use this token (with the username `__token__`) for publishing.
337    #[attr_added_in("0.4.16")]
338    pub const UV_PUBLISH_TOKEN: &'static str = "UV_PUBLISH_TOKEN";
339
340    /// Equivalent to the `--index` command-line argument in `uv publish`. If
341    /// set, uv will use the index with this name in the configuration for publishing.
342    #[attr_added_in("0.5.8")]
343    pub const UV_PUBLISH_INDEX: &'static str = "UV_PUBLISH_INDEX";
344
345    /// Equivalent to the `--username` command-line argument in `uv publish`. If
346    /// set, uv will use this username for publishing.
347    #[attr_added_in("0.4.16")]
348    pub const UV_PUBLISH_USERNAME: &'static str = "UV_PUBLISH_USERNAME";
349
350    /// Equivalent to the `--password` command-line argument in `uv publish`. If
351    /// set, uv will use this password for publishing.
352    #[attr_added_in("0.4.16")]
353    pub const UV_PUBLISH_PASSWORD: &'static str = "UV_PUBLISH_PASSWORD";
354
355    /// Equivalent to the `--check-url` command-line argument in `uv publish`.
356    /// Don't upload a file if it already exists on the index. The value is the URL of the index.
357    #[attr_added_in("0.4.30")]
358    pub const UV_PUBLISH_CHECK_URL: &'static str = "UV_PUBLISH_CHECK_URL";
359
360    /// Equivalent to the `--no-attestations` command-line argument in `uv publish`. If set,
361    /// uv will skip uploading any collected attestations for the published distributions.
362    #[attr_added_in("0.9.12")]
363    pub const UV_PUBLISH_NO_ATTESTATIONS: &'static str = "UV_PUBLISH_NO_ATTESTATIONS";
364
365    /// Equivalent to the `--no-sync` command-line argument. If set, uv will skip updating
366    /// the environment.
367    #[attr_added_in("0.4.18")]
368    pub const UV_NO_SYNC: &'static str = "UV_NO_SYNC";
369
370    /// Equivalent to the `--locked` command-line argument. If set, uv will assert that the
371    /// `uv.lock` remains unchanged.
372    #[attr_added_in("0.4.25")]
373    pub const UV_LOCKED: &'static str = "UV_LOCKED";
374
375    /// Equivalent to the `--frozen` command-line argument. If set, uv will run without
376    /// updating the `uv.lock` file.
377    #[attr_added_in("0.4.25")]
378    pub const UV_FROZEN: &'static str = "UV_FROZEN";
379
380    /// Equivalent to the `--preview` argument. Enables preview mode.
381    #[attr_added_in("0.1.37")]
382    pub const UV_PREVIEW: &'static str = "UV_PREVIEW";
383
384    /// Equivalent to the `--preview-features` argument. Enables specific preview features.
385    #[attr_added_in("0.8.4")]
386    pub const UV_PREVIEW_FEATURES: &'static str = "UV_PREVIEW_FEATURES";
387
388    /// Equivalent to the `--token` argument for self update. A GitHub token for authentication.
389    #[attr_added_in("0.4.10")]
390    pub const UV_GITHUB_TOKEN: &'static str = "UV_GITHUB_TOKEN";
391
392    /// Equivalent to the `--no-verify-hashes` argument. Disables hash verification for
393    /// `requirements.txt` files.
394    #[attr_added_in("0.5.3")]
395    pub const UV_NO_VERIFY_HASHES: &'static str = "UV_NO_VERIFY_HASHES";
396
397    /// Equivalent to the `--allow-insecure-host` argument.
398    #[attr_added_in("0.3.5")]
399    pub const UV_INSECURE_HOST: &'static str = "UV_INSECURE_HOST";
400
401    /// Disable ZIP validation for streamed wheels and ZIP-based source distributions.
402    ///
403    /// WARNING: Disabling ZIP validation can expose your system to security risks by bypassing
404    /// integrity checks and allowing uv to install potentially malicious ZIP files. If uv rejects
405    /// a ZIP file due to failing validation, it is likely that the file is malformed; consider
406    /// filing an issue with the package maintainer.
407    #[attr_added_in("0.8.6")]
408    pub const UV_INSECURE_NO_ZIP_VALIDATION: &'static str = "UV_INSECURE_NO_ZIP_VALIDATION";
409
410    /// Sets the maximum number of in-flight concurrent downloads that uv will
411    /// perform at any given time.
412    #[attr_added_in("0.1.43")]
413    pub const UV_CONCURRENT_DOWNLOADS: &'static str = "UV_CONCURRENT_DOWNLOADS";
414
415    /// Sets the maximum number of source distributions that uv will build
416    /// concurrently at any given time.
417    #[attr_added_in("0.1.43")]
418    pub const UV_CONCURRENT_BUILDS: &'static str = "UV_CONCURRENT_BUILDS";
419
420    /// Controls the number of threads used when installing and unzipping
421    /// packages.
422    #[attr_added_in("0.1.45")]
423    pub const UV_CONCURRENT_INSTALLS: &'static str = "UV_CONCURRENT_INSTALLS";
424
425    /// Controls the number of threads used to read cached HTTP responses.
426    #[attr_added_in("0.11.29")]
427    pub const UV_CONCURRENT_CACHE_READS: &'static str = "UV_CONCURRENT_CACHE_READS";
428
429    /// Equivalent to the `--no-progress` command-line argument. Disables all progress output. For
430    /// example, spinners and progress bars.
431    #[attr_added_in("0.2.28")]
432    pub const UV_NO_PROGRESS: &'static str = "UV_NO_PROGRESS";
433
434    /// Specifies the directory where uv stores managed tools.
435    #[attr_added_in("0.2.16")]
436    pub const UV_TOOL_DIR: &'static str = "UV_TOOL_DIR";
437
438    /// Specifies the "bin" directory for installing tool executables.
439    #[attr_added_in("0.3.0")]
440    pub const UV_TOOL_BIN_DIR: &'static str = "UV_TOOL_BIN_DIR";
441
442    /// Equivalent to the `--bare` argument for `uv init`. If set, uv will only create a
443    /// `pyproject.toml`.
444    #[attr_added_in("0.10.7")]
445    pub const UV_INIT_BARE: &'static str = "UV_INIT_BARE";
446
447    /// Equivalent to the `--build-backend` argument for `uv init`. Determines the default backend
448    /// to use when creating a new project.
449    #[attr_added_in("0.8.2")]
450    pub const UV_INIT_BUILD_BACKEND: &'static str = "UV_INIT_BUILD_BACKEND";
451
452    /// Specifies the path to the directory to use for a project virtual environment.
453    ///
454    /// See the [project documentation](../concepts/projects/config.md#project-environment-path)
455    /// for more details.
456    #[attr_added_in("0.4.4")]
457    pub const UV_PROJECT_ENVIRONMENT: &'static str = "UV_PROJECT_ENVIRONMENT";
458
459    /// Specifies the directory to place links to installed, managed Python executables.
460    #[attr_added_in("0.4.29")]
461    pub const UV_PYTHON_BIN_DIR: &'static str = "UV_PYTHON_BIN_DIR";
462
463    /// Specifies the directory for storing managed Python installations.
464    #[attr_added_in("0.2.22")]
465    pub const UV_PYTHON_INSTALL_DIR: &'static str = "UV_PYTHON_INSTALL_DIR";
466
467    /// Whether to install the Python executable into the `UV_PYTHON_BIN_DIR` directory.
468    #[attr_added_in("0.8.0")]
469    pub const UV_PYTHON_INSTALL_BIN: &'static str = "UV_PYTHON_INSTALL_BIN";
470
471    /// Whether to install the Python executable into the Windows registry.
472    #[attr_added_in("0.8.0")]
473    pub const UV_PYTHON_INSTALL_REGISTRY: &'static str = "UV_PYTHON_INSTALL_REGISTRY";
474
475    /// Disable use of the Windows registry for Python discovery and registration.
476    ///
477    /// When set, uv will not discover Python interpreters from the Windows registry or Microsoft
478    /// Store locations, and managed Python installations will not be registered in the Windows
479    /// registry.
480    #[attr_added_in("0.11.8")]
481    pub const UV_PYTHON_NO_REGISTRY: &'static str = "UV_PYTHON_NO_REGISTRY";
482
483    /// Managed Python installations information is hardcoded in the `uv` binary.
484    ///
485    /// This variable can be set to a local path or URL pointing to
486    /// a JSON list of Python installations to override the hardcoded list.
487    ///
488    /// This allows customizing the URLs for downloads or using slightly older or newer versions
489    /// of Python than the ones hardcoded into this build of `uv`.
490    #[attr_added_in("0.6.13")]
491    pub const UV_PYTHON_DOWNLOADS_JSON_URL: &'static str = "UV_PYTHON_DOWNLOADS_JSON_URL";
492
493    /// Specifies the directory for caching the archives of managed Python installations before
494    /// installation.
495    #[attr_added_in("0.7.0")]
496    pub const UV_PYTHON_CACHE_DIR: &'static str = "UV_PYTHON_CACHE_DIR";
497
498    /// Managed Python installations are downloaded from the Astral
499    /// [`python-build-standalone`](https://github.com/astral-sh/python-build-standalone) project.
500    ///
501    /// This variable can be set to a mirror URL to use a different source for Python installations.
502    /// The provided URL will replace `https://github.com/astral-sh/python-build-standalone/releases/download` in, e.g.,
503    /// `https://github.com/astral-sh/python-build-standalone/releases/download/20240713/cpython-3.12.4%2B20240713-aarch64-apple-darwin-install_only.tar.gz`.
504    /// Distributions can be read from a local directory by using the `file://` URL scheme.
505    ///
506    /// This more-specific mirror takes precedence over
507    /// [`UV_ASTRAL_MIRROR_URL`](Self::UV_ASTRAL_MIRROR_URL) for CPython downloads.
508    #[attr_added_in("0.2.35")]
509    pub const UV_PYTHON_INSTALL_MIRROR: &'static str = "UV_PYTHON_INSTALL_MIRROR";
510
511    /// Managed PyPy installations are downloaded from [python.org](https://downloads.python.org/).
512    ///
513    /// This variable can be set to a mirror URL to use a
514    /// different source for PyPy installations. The provided URL will replace
515    /// `https://downloads.python.org/pypy` in, e.g.,
516    /// `https://downloads.python.org/pypy/pypy3.8-v7.3.7-osx64.tar.bz2`.
517    /// Distributions can be read from a local directory by using the `file://` URL scheme.
518    #[attr_added_in("0.2.35")]
519    pub const UV_PYPY_INSTALL_MIRROR: &'static str = "UV_PYPY_INSTALL_MIRROR";
520
521    /// Replaces the `https://releases.astral.sh` base URL for all Astral-mirrored
522    /// metadata and artifact downloads.
523    ///
524    /// When set, uv uses only the configured mirror URL and does not fall back to
525    /// GitHub or raw GitHub. Path components in the URL are preserved: only
526    /// trailing slashes are trimmed before appending the normal path suffix
527    /// (e.g., `/github/versions/main/v1/uv.ndjson`).
528    ///
529    /// This is useful for proxy repositories (e.g., Artifactory, Nexus) that
530    /// mirror `releases.astral.sh`.
531    ///
532    /// More-specific sources take precedence:
533    /// [`UV_PYTHON_INSTALL_MIRROR`](Self::UV_PYTHON_INSTALL_MIRROR) and
534    /// `python-install-mirror` override this variable for CPython downloads, while
535    /// [`UV_INSTALLER_GITHUB_BASE_URL`](Self::UV_INSTALLER_GITHUB_BASE_URL) and
536    /// [`UV_INSTALLER_GHE_BASE_URL`](Self::UV_INSTALLER_GHE_BASE_URL) override this
537    /// variable for `uv self update`.
538    #[attr_added_in("0.11.14")]
539    pub(crate) const UV_ASTRAL_MIRROR_URL: &'static str = "UV_ASTRAL_MIRROR_URL";
540
541    /// Pin managed CPython versions to a specific build version.
542    ///
543    /// For CPython, this should be the build date (e.g., "20250814").
544    #[attr_added_in("0.8.14")]
545    pub const UV_PYTHON_CPYTHON_BUILD: &'static str = "UV_PYTHON_CPYTHON_BUILD";
546
547    /// Pin managed PyPy versions to a specific build version.
548    ///
549    /// For PyPy, this should be the PyPy version (e.g., "7.3.20").
550    #[attr_added_in("0.8.14")]
551    pub const UV_PYTHON_PYPY_BUILD: &'static str = "UV_PYTHON_PYPY_BUILD";
552
553    /// Pin managed GraalPy versions to a specific build version.
554    ///
555    /// For GraalPy, this should be the GraalPy version (e.g., "24.2.2").
556    #[attr_added_in("0.8.14")]
557    pub const UV_PYTHON_GRAALPY_BUILD: &'static str = "UV_PYTHON_GRAALPY_BUILD";
558
559    /// Pin managed Pyodide versions to a specific build version.
560    ///
561    /// For Pyodide, this should be the Pyodide version (e.g., "0.28.1").
562    #[attr_added_in("0.8.14")]
563    pub const UV_PYTHON_PYODIDE_BUILD: &'static str = "UV_PYTHON_PYODIDE_BUILD";
564
565    /// Equivalent to the `--clear` command-line argument. If set, uv will remove any
566    /// existing files or directories at the target path.
567    #[attr_added_in("0.8.0")]
568    pub const UV_VENV_CLEAR: &'static str = "UV_VENV_CLEAR";
569
570    /// Equivalent to the `--relocatable` command-line argument. If set, the virtual
571    /// environment will be relocatable.
572    #[attr_added_in("0.10.8")]
573    pub const UV_VENV_RELOCATABLE: &'static str = "UV_VENV_RELOCATABLE";
574
575    /// Install seed packages (one or more of: `pip`, `setuptools`, and `wheel`) into the virtual environment
576    /// created by `uv venv`.
577    ///
578    /// Note that `setuptools` and `wheel` are not included in Python 3.12+ environments.
579    #[attr_added_in("0.5.21")]
580    pub const UV_VENV_SEED: &'static str = "UV_VENV_SEED";
581
582    /// Used to override `PATH` for Python executable discovery.
583    ///
584    /// When set, uv will search for Python interpreters in the directories specified by this
585    /// variable instead of `PATH`.
586    #[attr_added_in("0.11.8")]
587    pub const UV_PYTHON_SEARCH_PATH: &'static str = "UV_PYTHON_SEARCH_PATH";
588
589    /// Include resolver and installer output related to environment modifications.
590    #[attr_hidden]
591    #[attr_added_in("0.2.32")]
592    pub const UV_SHOW_RESOLUTION: &'static str = "UV_SHOW_RESOLUTION";
593
594    /// Use to update the json schema files.
595    #[attr_hidden]
596    #[attr_added_in("0.1.34")]
597    pub const UV_UPDATE_SCHEMA: &'static str = "UV_UPDATE_SCHEMA";
598
599    /// Use to disable line wrapping for diagnostics.
600    #[attr_added_in("0.0.5")]
601    pub const UV_NO_WRAP: &'static str = "UV_NO_WRAP";
602
603    /// Set to `1` to enable the automatic malware check that runs after `uv sync`.
604    ///
605    /// When enabled, uv performs a lightweight check against the OSV database for known
606    /// malware advisories after every lockfile sync. Set this variable to `0` to opt out.
607    #[attr_added_in("0.11.16")]
608    pub const UV_MALWARE_CHECK: &'static str = "UV_MALWARE_CHECK";
609
610    /// Override the vulnerability service URL for the automatic malware check.
611    ///
612    /// Defaults to the OSV API endpoint (`https://api.osv.dev/`).
613    #[attr_added_in("0.11.16")]
614    pub const UV_MALWARE_CHECK_URL: &'static str = "UV_MALWARE_CHECK_URL";
615
616    /// Provides the HTTP Basic authentication username for a named index.
617    ///
618    /// The `name` parameter is the name of the index. For example, given an index named `foo`,
619    /// the environment variable key would be `UV_INDEX_FOO_USERNAME`.
620    #[attr_added_in("0.4.23")]
621    #[attr_env_var_pattern("UV_INDEX_{name}_USERNAME")]
622    pub fn index_username(name: &str) -> String {
623        format!("UV_INDEX_{name}_USERNAME")
624    }
625
626    /// Provides the HTTP Basic authentication password for a named index.
627    ///
628    /// The `name` parameter is the name of the index. For example, given an index named `foo`,
629    /// the environment variable key would be `UV_INDEX_FOO_PASSWORD`.
630    #[attr_added_in("0.4.23")]
631    #[attr_env_var_pattern("UV_INDEX_{name}_PASSWORD")]
632    pub fn index_password(name: &str) -> String {
633        format!("UV_INDEX_{name}_PASSWORD")
634    }
635
636    /// Used to set the uv commit hash at build time via `build.rs`.
637    #[attr_hidden]
638    #[attr_added_in("0.1.11")]
639    pub const UV_COMMIT_HASH: &'static str = "UV_COMMIT_HASH";
640
641    /// Used to set the uv commit short hash at build time via `build.rs`.
642    #[attr_hidden]
643    #[attr_added_in("0.1.11")]
644    pub const UV_COMMIT_SHORT_HASH: &'static str = "UV_COMMIT_SHORT_HASH";
645
646    /// Used to set the uv commit date at build time via `build.rs`.
647    #[attr_hidden]
648    #[attr_added_in("0.1.11")]
649    pub const UV_COMMIT_DATE: &'static str = "UV_COMMIT_DATE";
650
651    /// Used to set the uv tag at build time via `build.rs`.
652    #[attr_hidden]
653    #[attr_added_in("0.1.11")]
654    pub const UV_LAST_TAG: &'static str = "UV_LAST_TAG";
655
656    /// Used to set the uv tag distance from head at build time via `build.rs`.
657    #[attr_hidden]
658    #[attr_added_in("0.1.11")]
659    pub const UV_LAST_TAG_DISTANCE: &'static str = "UV_LAST_TAG_DISTANCE";
660
661    /// Used to set the spawning/parent interpreter when using --system in the test suite.
662    #[attr_hidden]
663    #[attr_added_in("0.2.0")]
664    pub const UV_INTERNAL__PARENT_INTERPRETER: &'static str = "UV_INTERNAL__PARENT_INTERPRETER";
665
666    /// Used to identify the source tree when invoking PEP 517 build hooks.
667    #[attr_hidden]
668    #[attr_added_in("0.11.22")]
669    pub const UV_INTERNAL__BUILD_DIR: &'static str = "UV_INTERNAL__BUILD_DIR";
670
671    /// Used to force showing the derivation tree during resolver error reporting.
672    #[attr_hidden]
673    #[attr_added_in("0.3.0")]
674    pub const UV_INTERNAL__SHOW_DERIVATION_TREE: &'static str = "UV_INTERNAL__SHOW_DERIVATION_TREE";
675
676    /// Used to set a temporary directory for some tests.
677    #[attr_hidden]
678    #[attr_added_in("0.3.4")]
679    pub const UV_INTERNAL__TEST_DIR: &'static str = "UV_INTERNAL__TEST_DIR";
680
681    /// Path to a directory on a filesystem that supports copy-on-write, e.g., btrfs or APFS.
682    ///
683    /// When populated, uv will run additional tests that require this functionality.
684    #[attr_hidden]
685    #[attr_added_in("0.10.5")]
686    pub const UV_INTERNAL__TEST_COW_FS: &'static str = "UV_INTERNAL__TEST_COW_FS";
687
688    /// Path to a directory on a filesystem that does **not** support copy-on-write.
689    ///
690    /// When populated, uv will run additional tests that verify fallback behavior
691    /// when copy-on-write is unavailable.
692    #[attr_hidden]
693    #[attr_added_in("0.10.5")]
694    pub const UV_INTERNAL__TEST_NOCOW_FS: &'static str = "UV_INTERNAL__TEST_NOCOW_FS";
695
696    /// Path to a directory on an alternative filesystem for testing.
697    ///
698    /// This filesystem must be a different device than the default for the test suite.
699    ///
700    /// When populated, uv will run additional tests that cover cross-filesystem linking.
701    #[attr_hidden]
702    #[attr_added_in("0.10.5")]
703    pub const UV_INTERNAL__TEST_ALT_FS: &'static str = "UV_INTERNAL__TEST_ALT_FS";
704
705    /// Network path to a directory on an SMB filesystem for testing.
706    ///
707    /// When populated, uv will run additional tests that cover SMB-specific filesystem behavior.
708    #[attr_hidden]
709    #[attr_added_in("0.11.16")]
710    pub const UV_INTERNAL__TEST_SMB_FS: &'static str = "UV_INTERNAL__TEST_SMB_FS";
711
712    /// Path to a directory on a filesystem with a low hardlink limit (e.g., minix with ~250).
713    ///
714    /// When populated, uv will run additional tests that exercise EMLINK recovery.
715    #[attr_hidden]
716    #[attr_added_in("0.10.9")]
717    pub const UV_INTERNAL__TEST_LOWLINKS_FS: &'static str = "UV_INTERNAL__TEST_LOWLINKS_FS";
718
719    /// Used to force treating an interpreter as "managed" during tests.
720    #[attr_hidden]
721    #[attr_added_in("0.8.0")]
722    pub const UV_INTERNAL__TEST_PYTHON_MANAGED: &'static str = "UV_INTERNAL__TEST_PYTHON_MANAGED";
723
724    /// Used to force ignoring Git LFS commands as `git-lfs` detection cannot be overridden via PATH.
725    #[attr_hidden]
726    #[attr_added_in("0.9.15")]
727    pub const UV_INTERNAL__TEST_LFS_DISABLED: &'static str = "UV_INTERNAL__TEST_LFS_DISABLED";
728
729    /// Path to system-level configuration directory on Unix systems.
730    #[attr_added_in("0.4.26")]
731    pub const XDG_CONFIG_DIRS: &'static str = "XDG_CONFIG_DIRS";
732
733    /// Path to system-level configuration directory on Windows systems.
734    #[attr_added_in("0.4.26")]
735    pub const SYSTEMDRIVE: &'static str = "SYSTEMDRIVE";
736
737    /// Path to user-level configuration directory on Windows systems.
738    #[attr_added_in("0.1.42")]
739    pub const APPDATA: &'static str = "APPDATA";
740
741    /// Path to root directory of user's profile on Windows systems.
742    #[attr_added_in("0.0.5")]
743    pub const USERPROFILE: &'static str = "USERPROFILE";
744
745    /// Path to user-level configuration directory on Unix systems.
746    #[attr_added_in("0.1.34")]
747    pub const XDG_CONFIG_HOME: &'static str = "XDG_CONFIG_HOME";
748
749    /// Path to cache directory on Unix systems.
750    #[attr_added_in("0.1.17")]
751    pub const XDG_CACHE_HOME: &'static str = "XDG_CACHE_HOME";
752
753    /// Path to directory for storing managed Python installations and tools.
754    #[attr_added_in("0.2.16")]
755    pub const XDG_DATA_HOME: &'static str = "XDG_DATA_HOME";
756
757    /// Path to directory where executables are installed.
758    #[attr_added_in("0.2.16")]
759    pub const XDG_BIN_HOME: &'static str = "XDG_BIN_HOME";
760
761    /// Path to a CA certificate bundle file for TLS connections.
762    ///
763    /// Requires a PEM-encoded certificate file (e.g., `certs.pem`, `ca-bundle.crt`). DER-encoded
764    /// files are not supported.
765    ///
766    /// When set, this overrides the default certificate source (bundled Mozilla roots or system
767    /// certificates). Only the certificates in this file will be trusted.
768    #[attr_added_in("0.1.14")]
769    pub const SSL_CERT_FILE: &'static str = "SSL_CERT_FILE";
770
771    /// Path to a directory containing PEM-encoded CA certificate files for TLS connections.
772    ///
773    /// Multiple entries are supported, separated using a platform-specific delimiter (`:` on Unix,
774    /// `;` on Windows).
775    ///
776    /// Certificates are usually stored with `.pem`, `.crt`, or `.cer` extensions, but uv will
777    /// attempt to read a certificate from any regular file in the provided `SSL_CERT_DIR`.
778    ///
779    /// Files that cannot be parsed as PEM certificates are ignored. uv resolves symlinks and
780    /// ignores dangling symlinks.
781    ///
782    /// Only PEM-encoded files are supported, i.e., DER-encoded files are not supported.
783    ///
784    /// When set, this overrides the default certificate source (bundled Mozilla roots or system
785    /// certificates). Only the certificates in this directory will be trusted.
786    #[attr_added_in("0.9.10")]
787    pub const SSL_CERT_DIR: &'static str = "SSL_CERT_DIR";
788
789    /// If set, uv will use this file for mTLS authentication.
790    /// This should be a single file containing both the certificate and the private key in PEM format.
791    #[attr_added_in("0.2.11")]
792    pub const SSL_CLIENT_CERT: &'static str = "SSL_CLIENT_CERT";
793
794    /// Proxy for HTTP requests.
795    #[attr_added_in("0.1.38")]
796    pub const HTTP_PROXY: &'static str = "HTTP_PROXY";
797
798    /// Proxy for HTTPS requests.
799    #[attr_added_in("0.1.38")]
800    pub const HTTPS_PROXY: &'static str = "HTTPS_PROXY";
801
802    /// General proxy for all network requests.
803    #[attr_added_in("0.1.38")]
804    pub const ALL_PROXY: &'static str = "ALL_PROXY";
805
806    /// Comma-separated list of hostnames (e.g., `example.com`) and/or patterns (e.g., `192.168.1.0/24`) that should bypass the proxy.
807    #[attr_added_in("0.1.38")]
808    pub const NO_PROXY: &'static str = "NO_PROXY";
809
810    /// Timeout (in seconds) for only upload HTTP requests. (default: 900 s)
811    #[attr_added_in("0.9.1")]
812    pub const UV_UPLOAD_HTTP_TIMEOUT: &'static str = "UV_UPLOAD_HTTP_TIMEOUT";
813
814    /// Timeout (in seconds) for HTTP reads. (default: 30 s)
815    #[attr_added_in("0.1.7")]
816    pub const UV_HTTP_TIMEOUT: &'static str = "UV_HTTP_TIMEOUT";
817
818    /// Timeout (in seconds) to connect to a server. (default: 10 s)
819    ///
820    /// If `UV_HTTP_TIMEOUT` is lower than this value, `UV_HTTP_TIMEOUT` will be used instead.
821    #[attr_added_in("0.10.0")]
822    pub const UV_HTTP_CONNECT_TIMEOUT: &'static str = "UV_HTTP_CONNECT_TIMEOUT";
823
824    /// The number of retries for HTTP requests. (default: 3)
825    #[attr_added_in("0.7.21")]
826    pub const UV_HTTP_RETRIES: &'static str = "UV_HTTP_RETRIES";
827
828    /// Timeout (in seconds) for HTTP requests. Equivalent to `UV_HTTP_TIMEOUT`.
829    #[attr_added_in("0.1.6")]
830    pub const UV_REQUEST_TIMEOUT: &'static str = "UV_REQUEST_TIMEOUT";
831
832    /// Timeout (in seconds) for HTTP requests. Equivalent to `UV_HTTP_TIMEOUT`.
833    #[attr_added_in("0.1.7")]
834    pub const HTTP_TIMEOUT: &'static str = "HTTP_TIMEOUT";
835
836    /// The validation modes to use when run with `--compile`.
837    ///
838    /// See [`PycInvalidationMode`](https://docs.python.org/3/library/py_compile.html#py_compile.PycInvalidationMode).
839    #[attr_added_in("0.1.7")]
840    pub const PYC_INVALIDATION_MODE: &'static str = "PYC_INVALIDATION_MODE";
841
842    /// Used to detect an activated virtual environment.
843    #[attr_added_in("0.0.5")]
844    pub const VIRTUAL_ENV: &'static str = "VIRTUAL_ENV";
845
846    /// Used to detect the path of an active Conda environment.
847    #[attr_added_in("0.0.5")]
848    pub const CONDA_PREFIX: &'static str = "CONDA_PREFIX";
849
850    /// Used to determine the name of the active Conda environment.
851    #[attr_added_in("0.5.0")]
852    pub const CONDA_DEFAULT_ENV: &'static str = "CONDA_DEFAULT_ENV";
853
854    /// Used to determine the root install path of Conda.
855    #[attr_added_in("0.8.18")]
856    pub const CONDA_ROOT: &'static str = "_CONDA_ROOT";
857
858    /// Used to determine if we're running in Dependabot.
859    #[attr_added_in("0.9.11")]
860    pub const DEPENDABOT: &'static str = "DEPENDABOT";
861
862    /// If set to `1` before a virtual environment is activated, then the
863    /// virtual environment name will not be prepended to the terminal prompt.
864    #[attr_added_in("0.0.5")]
865    pub const VIRTUAL_ENV_DISABLE_PROMPT: &'static str = "VIRTUAL_ENV_DISABLE_PROMPT";
866
867    /// Used to detect the use of the Windows Command Prompt (as opposed to PowerShell).
868    #[attr_added_in("0.1.16")]
869    pub const PROMPT: &'static str = "PROMPT";
870
871    /// Used to detect `NuShell` usage.
872    #[attr_added_in("0.1.16")]
873    pub const NU_VERSION: &'static str = "NU_VERSION";
874
875    /// Used to detect Fish shell usage.
876    #[attr_added_in("0.1.28")]
877    pub const FISH_VERSION: &'static str = "FISH_VERSION";
878
879    /// Used to detect Bash shell usage.
880    #[attr_added_in("0.1.28")]
881    pub const BASH_VERSION: &'static str = "BASH_VERSION";
882
883    /// Used to detect Zsh shell usage.
884    #[attr_added_in("0.1.28")]
885    pub const ZSH_VERSION: &'static str = "ZSH_VERSION";
886
887    /// Used to determine which `.zshenv` to use when Zsh is being used.
888    #[attr_added_in("0.2.25")]
889    pub const ZDOTDIR: &'static str = "ZDOTDIR";
890
891    /// Used to detect Ksh shell usage.
892    #[attr_added_in("0.2.33")]
893    pub const KSH_VERSION: &'static str = "KSH_VERSION";
894
895    /// Used to detect PowerShell usage (set by PowerShell on all platforms).
896    #[attr_added_in("0.10.0")]
897    pub const PS_MODULE_PATH: &'static str = "PSModulePath";
898
899    /// Used with `--python-platform macos` and related variants to set the
900    /// deployment target (i.e., the minimum supported macOS version).
901    ///
902    /// Defaults to `13.0`, the least-recent non-EOL macOS version at time of writing.
903    #[attr_added_in("0.1.42")]
904    pub const MACOSX_DEPLOYMENT_TARGET: &'static str = "MACOSX_DEPLOYMENT_TARGET";
905
906    /// Used with `--python-platform arm64-apple-ios` and related variants to set the
907    /// deployment target (i.e., the minimum supported iOS version).
908    ///
909    /// Defaults to `13.0`.
910    #[attr_added_in("0.8.16")]
911    pub const IPHONEOS_DEPLOYMENT_TARGET: &'static str = "IPHONEOS_DEPLOYMENT_TARGET";
912
913    /// Used with `--python-platform aarch64-linux-android` and related variants to set the
914    /// Android API level. (i.e., the minimum supported Android API level).
915    ///
916    /// Defaults to `24`.
917    #[attr_added_in("0.8.16")]
918    pub const ANDROID_API_LEVEL: &'static str = "ANDROID_API_LEVEL";
919
920    /// Disables colored output (takes precedence over `FORCE_COLOR`).
921    ///
922    /// See [no-color.org](https://no-color.org).
923    #[attr_added_in("0.2.7")]
924    pub const NO_COLOR: &'static str = "NO_COLOR";
925
926    /// Forces colored output regardless of terminal support.
927    ///
928    /// See [force-color.org](https://force-color.org).
929    #[attr_added_in("0.2.7")]
930    pub const FORCE_COLOR: &'static str = "FORCE_COLOR";
931
932    /// Use to control color via `anstyle`.
933    #[attr_added_in("0.1.32")]
934    pub const CLICOLOR_FORCE: &'static str = "CLICOLOR_FORCE";
935
936    /// The standard `PATH` env var.
937    #[attr_added_in("0.0.5")]
938    pub const PATH: &'static str = "PATH";
939
940    /// The standard `HOME` env var.
941    #[attr_added_in("0.0.5")]
942    pub const HOME: &'static str = "HOME";
943
944    /// The standard `SHELL` posix env var.
945    #[attr_added_in("0.1.16")]
946    pub const SHELL: &'static str = "SHELL";
947
948    /// The standard `PWD` posix env var.
949    #[attr_added_in("0.0.5")]
950    pub const PWD: &'static str = "PWD";
951
952    /// Used to look for Microsoft Store Pythons installations.
953    #[attr_added_in("0.3.3")]
954    pub const LOCALAPPDATA: &'static str = "LOCALAPPDATA";
955
956    /// Path to the `.git` directory. Ignored by `uv` when performing fetch.
957    #[attr_hidden]
958    #[attr_added_in("0.0.5")]
959    pub const GIT_DIR: &'static str = "GIT_DIR";
960
961    /// Path to the git working tree. Ignored by `uv` when performing fetch.
962    #[attr_hidden]
963    #[attr_added_in("0.0.5")]
964    pub const GIT_WORK_TREE: &'static str = "GIT_WORK_TREE";
965
966    /// Path to the index file for staged changes. Ignored by `uv` when performing fetch.
967    #[attr_hidden]
968    #[attr_added_in("0.0.5")]
969    pub const GIT_INDEX_FILE: &'static str = "GIT_INDEX_FILE";
970
971    /// Path to where git object files are located. Ignored by `uv` when performing fetch.
972    #[attr_hidden]
973    #[attr_added_in("0.0.5")]
974    pub const GIT_OBJECT_DIRECTORY: &'static str = "GIT_OBJECT_DIRECTORY";
975
976    /// Alternate locations for git objects. Ignored by `uv` when performing fetch.
977    #[attr_hidden]
978    #[attr_added_in("0.0.5")]
979    pub const GIT_ALTERNATE_OBJECT_DIRECTORIES: &'static str = "GIT_ALTERNATE_OBJECT_DIRECTORIES";
980
981    /// Disables SSL verification for git operations.
982    #[attr_hidden]
983    #[attr_added_in("0.5.28")]
984    pub const GIT_SSL_NO_VERIFY: &'static str = "GIT_SSL_NO_VERIFY";
985
986    /// Sets allowed protocols for git operations.
987    ///
988    /// When uv is in "offline" mode, only the "file" protocol is allowed.
989    #[attr_hidden]
990    #[attr_added_in("0.6.13")]
991    pub const GIT_ALLOW_PROTOCOL: &'static str = "GIT_ALLOW_PROTOCOL";
992
993    /// Sets the SSH command used when Git tries to establish a connection using SSH.
994    #[attr_hidden]
995    #[attr_added_in("0.7.11")]
996    pub const GIT_SSH_COMMAND: &'static str = "GIT_SSH_COMMAND";
997
998    /// Disable interactive git prompts in terminals, e.g., for credentials. Does not disable
999    /// GUI prompts.
1000    #[attr_hidden]
1001    #[attr_added_in("0.6.4")]
1002    pub const GIT_TERMINAL_PROMPT: &'static str = "GIT_TERMINAL_PROMPT";
1003
1004    /// Skip Smudge LFS Filter.
1005    #[attr_hidden]
1006    #[attr_added_in("0.9.15")]
1007    pub const GIT_LFS_SKIP_SMUDGE: &'static str = "GIT_LFS_SKIP_SMUDGE";
1008
1009    /// Used in tests to set the user global git config location.
1010    #[attr_hidden]
1011    #[attr_added_in("0.9.15")]
1012    pub const GIT_CONFIG_GLOBAL: &'static str = "GIT_CONFIG_GLOBAL";
1013
1014    /// Used in tests for better git isolation.
1015    ///
1016    /// For example, we run some tests in ~/.local/share/uv/tests.
1017    /// And if the user's `$HOME` directory is a git repository,
1018    /// this will change the behavior of some tests. Setting
1019    /// `GIT_CEILING_DIRECTORIES=/home/andrew/.local/share/uv/tests` will
1020    /// prevent git from crawling up the directory tree past that point to find
1021    /// parent git repositories.
1022    #[attr_hidden]
1023    #[attr_added_in("0.4.29")]
1024    pub const GIT_CEILING_DIRECTORIES: &'static str = "GIT_CEILING_DIRECTORIES";
1025
1026    /// Cleared for uv's git invocations to ensure git behaves correctly in
1027    /// spite of an odd environment.
1028    #[attr_hidden]
1029    #[attr_added_in("0.11.8")]
1030    pub const GIT_COMMON_DIR: &'static str = "GIT_COMMON_DIR";
1031
1032    /// Indicates that the current process is running in GitHub Actions.
1033    ///
1034    /// `uv publish` may attempt trusted publishing flows when set
1035    /// to `true`.
1036    #[attr_added_in("0.4.16")]
1037    pub const GITHUB_ACTIONS: &'static str = "GITHUB_ACTIONS";
1038
1039    /// Indicates that the current process is running in GitLab CI.
1040    ///
1041    /// `uv publish` may attempt trusted publishing flows when set
1042    /// to `true`.
1043    #[attr_added_in("0.8.18")]
1044    pub const GITLAB_CI: &'static str = "GITLAB_CI";
1045
1046    /// Used for testing GitLab CI trusted publishing.
1047    #[attr_hidden]
1048    #[attr_added_in("0.8.18")]
1049    pub const PYPI_ID_TOKEN: &'static str = "PYPI_ID_TOKEN";
1050
1051    /// Used for testing GitLab CI trusted publishing.
1052    #[attr_hidden]
1053    #[attr_added_in("0.8.18")]
1054    pub const TESTPYPI_ID_TOKEN: &'static str = "TESTPYPI_ID_TOKEN";
1055
1056    /// Sets the encoding for standard I/O streams (e.g., PYTHONIOENCODING=utf-8).
1057    #[attr_hidden]
1058    #[attr_added_in("0.4.18")]
1059    pub const PYTHONIOENCODING: &'static str = "PYTHONIOENCODING";
1060
1061    /// Forces unbuffered I/O streams, equivalent to `-u` in Python.
1062    #[attr_hidden]
1063    #[attr_added_in("0.1.15")]
1064    pub const PYTHONUNBUFFERED: &'static str = "PYTHONUNBUFFERED";
1065
1066    /// Enables UTF-8 mode for Python, equivalent to `-X utf8`.
1067    #[attr_hidden]
1068    #[attr_added_in("0.4.19")]
1069    pub const PYTHONUTF8: &'static str = "PYTHONUTF8";
1070
1071    /// Adds directories to Python module search path (e.g., `PYTHONPATH=/path/to/modules`).
1072    #[attr_added_in("0.1.22")]
1073    pub const PYTHONPATH: &'static str = "PYTHONPATH";
1074
1075    /// Used to set the location of Python stdlib when using trampolines.
1076    #[attr_hidden]
1077    #[attr_added_in("0.7.13")]
1078    pub const PYTHONHOME: &'static str = "PYTHONHOME";
1079
1080    /// Used to correctly detect virtual environments when using trampolines.
1081    #[attr_hidden]
1082    #[attr_added_in("0.7.13")]
1083    pub const PYVENV_LAUNCHER: &'static str = "__PYVENV_LAUNCHER__";
1084
1085    /// Used in tests to enforce a consistent locale setting.
1086    #[attr_hidden]
1087    #[attr_added_in("0.4.28")]
1088    pub const LC_ALL: &'static str = "LC_ALL";
1089
1090    /// Typically set by CI runners, used to detect a CI runner.
1091    #[attr_hidden]
1092    #[attr_added_in("0.0.5")]
1093    pub const CI: &'static str = "CI";
1094
1095    /// Azure DevOps build identifier, used to detect CI environments.
1096    #[attr_hidden]
1097    #[attr_added_in("0.1.22")]
1098    pub const BUILD_BUILDID: &'static str = "BUILD_BUILDID";
1099
1100    /// Generic build identifier, used to detect CI environments.
1101    #[attr_hidden]
1102    #[attr_added_in("0.1.22")]
1103    pub const BUILD_ID: &'static str = "BUILD_ID";
1104
1105    /// Pip environment variable to indicate CI environment.
1106    #[attr_hidden]
1107    #[attr_added_in("0.1.22")]
1108    pub const PIP_IS_CI: &'static str = "PIP_IS_CI";
1109
1110    /// Use to set the .netrc file location.
1111    #[attr_added_in("0.1.16")]
1112    pub const NETRC: &'static str = "NETRC";
1113
1114    /// The standard `PAGER` posix env var. Used by `uv` to configure the appropriate pager.
1115    #[attr_added_in("0.4.18")]
1116    pub const PAGER: &'static str = "PAGER";
1117
1118    /// Used to detect when running inside a Jupyter notebook.
1119    #[attr_added_in("0.2.6")]
1120    pub const JPY_SESSION_NAME: &'static str = "JPY_SESSION_NAME";
1121
1122    /// Use to create the tracing root directory via the `tracing-durations-export` feature.
1123    #[attr_hidden]
1124    #[attr_added_in("0.1.32")]
1125    pub const TRACING_DURATIONS_TEST_ROOT: &'static str = "TRACING_DURATIONS_TEST_ROOT";
1126
1127    /// Use to create the tracing durations file via the `tracing-durations-export` feature.
1128    #[attr_added_in("0.0.5")]
1129    pub const TRACING_DURATIONS_FILE: &'static str = "TRACING_DURATIONS_FILE";
1130
1131    /// Used to set `RUST_HOST_TARGET` at build time via `build.rs`.
1132    #[attr_hidden]
1133    #[attr_added_in("0.1.11")]
1134    pub const TARGET: &'static str = "TARGET";
1135
1136    /// If set, uv will use this value as the log level for its `--verbose` output. Accepts
1137    /// any filter compatible with the `tracing_subscriber` crate.
1138    ///
1139    /// For example:
1140    ///
1141    /// * `RUST_LOG=uv=debug` is the equivalent of adding `--verbose` to the command line
1142    /// * `RUST_LOG=trace` will enable trace-level logging.
1143    ///
1144    /// See the [tracing documentation](https://docs.rs/tracing-subscriber/latest/tracing_subscriber/filter/struct.EnvFilter.html#example-syntax)
1145    /// for more.
1146    #[attr_added_in("0.0.5")]
1147    pub const RUST_LOG: &'static str = "RUST_LOG";
1148
1149    /// If set, it can be used to display more stack trace details when a panic occurs.
1150    /// This is used by uv particularly on windows to show more details during a platform exception.
1151    ///
1152    /// For example:
1153    ///
1154    /// * `RUST_BACKTRACE=1` will print a short backtrace.
1155    /// * `RUST_BACKTRACE=full` will print a full backtrace.
1156    ///
1157    /// See the [Rust backtrace documentation](https://doc.rust-lang.org/std/backtrace/index.html)
1158    /// for more.
1159    #[attr_added_in("0.7.22")]
1160    pub const RUST_BACKTRACE: &'static str = "RUST_BACKTRACE";
1161
1162    /// Add additional context and structure to log messages.
1163    ///
1164    /// If logging is not enabled, e.g., with `RUST_LOG` or `-v`, this has no effect.
1165    #[attr_added_in("0.6.4")]
1166    pub const UV_LOG_CONTEXT: &'static str = "UV_LOG_CONTEXT";
1167
1168    /// Use to set the stack size used by uv.
1169    ///
1170    /// The value is in bytes, and if both `UV_STACK_SIZE` are `RUST_MIN_STACK` unset, uv uses a 4MB
1171    /// (4194304) stack. `UV_STACK_SIZE` takes precedence over `RUST_MIN_STACK`.
1172    ///
1173    /// Unlike the normal `RUST_MIN_STACK` semantics, this can affect main thread
1174    /// stack size, because we actually spawn our own main2 thread to work around
1175    /// the fact that Windows' real main thread is only 1MB. That thread has size
1176    /// `max(UV_STACK_SIZE, 1MB)`.
1177    #[attr_added_in("0.0.5")]
1178    pub const UV_STACK_SIZE: &'static str = "UV_STACK_SIZE";
1179
1180    /// Use to set the stack size used by uv.
1181    ///
1182    /// The value is in bytes, and if both `UV_STACK_SIZE` are `RUST_MIN_STACK` unset, uv uses a 4MB
1183    /// (4194304) stack. `UV_STACK_SIZE` takes precedence over `RUST_MIN_STACK`.
1184    ///
1185    /// Prefer setting `UV_STACK_SIZE`, since `RUST_MIN_STACK` also affects subprocesses, such as
1186    /// build backends that use Rust code.
1187    ///
1188    /// Unlike the normal `RUST_MIN_STACK` semantics, this can affect main thread
1189    /// stack size, because we actually spawn our own main2 thread to work around
1190    /// the fact that Windows' real main thread is only 1MB. That thread has size
1191    /// `max(RUST_MIN_STACK, 1MB)`.
1192    #[attr_added_in("0.5.19")]
1193    pub const RUST_MIN_STACK: &'static str = "RUST_MIN_STACK";
1194
1195    /// The directory containing the `Cargo.toml` manifest for a package.
1196    #[attr_hidden]
1197    #[attr_added_in("0.1.11")]
1198    pub const CARGO_MANIFEST_DIR: &'static str = "CARGO_MANIFEST_DIR";
1199
1200    /// Specifies the directory where Cargo stores build artifacts (target directory).
1201    #[attr_hidden]
1202    #[attr_added_in("0.0.5")]
1203    pub const CARGO_TARGET_DIR: &'static str = "CARGO_TARGET_DIR";
1204
1205    /// Set by cargo when compiling for Windows-like platforms.
1206    #[attr_hidden]
1207    #[attr_added_in("0.0.5")]
1208    pub const CARGO_CFG_WINDOWS: &'static str = "CARGO_CFG_WINDOWS";
1209
1210    /// Specifies the directory where Cargo stores intermediate build artifacts.
1211    #[attr_hidden]
1212    #[attr_added_in("0.8.25")]
1213    pub const OUT_DIR: &'static str = "OUT_DIR";
1214
1215    /// Used in tests for environment substitution testing in `requirements.in`.
1216    #[attr_hidden]
1217    #[attr_added_in("0.1.18")]
1218    pub const URL: &'static str = "URL";
1219
1220    /// Used in tests for environment substitution testing in `requirements.in`.
1221    #[attr_hidden]
1222    #[attr_added_in("0.1.18")]
1223    pub const FILE_PATH: &'static str = "FILE_PATH";
1224
1225    /// Used in tests for environment substitution testing in `requirements.in`.
1226    #[attr_hidden]
1227    #[attr_added_in("0.1.25")]
1228    pub const HATCH_PATH: &'static str = "HATCH_PATH";
1229
1230    /// Used in tests for environment substitution testing in `requirements.in`.
1231    #[attr_hidden]
1232    #[attr_added_in("0.1.25")]
1233    pub const BLACK_PATH: &'static str = "BLACK_PATH";
1234
1235    /// Used in testing Hatch's root.uri feature
1236    ///
1237    /// See: <https://hatch.pypa.io/dev/config/dependency/#local>.
1238    #[attr_hidden]
1239    #[attr_added_in("0.1.22")]
1240    pub const ROOT_PATH: &'static str = "ROOT_PATH";
1241
1242    /// Used in testing extra build dependencies.
1243    #[attr_hidden]
1244    #[attr_added_in("0.8.5")]
1245    pub const EXPECTED_ANYIO_VERSION: &'static str = "EXPECTED_ANYIO_VERSION";
1246
1247    /// Used to set test credentials for keyring tests.
1248    #[attr_hidden]
1249    #[attr_added_in("0.1.34")]
1250    pub const KEYRING_TEST_CREDENTIALS: &'static str = "KEYRING_TEST_CREDENTIALS";
1251
1252    /// Used to disable delay for HTTP retries in tests.
1253    #[attr_added_in("0.7.21")]
1254    pub const UV_TEST_NO_HTTP_RETRY_DELAY: &'static str = "UV_TEST_NO_HTTP_RETRY_DELAY";
1255
1256    /// Used for testing named indexes in tests.
1257    #[attr_hidden]
1258    #[attr_added_in("0.5.21")]
1259    pub const UV_INDEX_MY_INDEX_USERNAME: &'static str = "UV_INDEX_MY_INDEX_USERNAME";
1260
1261    /// Used for testing named indexes in tests.
1262    #[attr_hidden]
1263    #[attr_added_in("0.5.21")]
1264    pub const UV_INDEX_MY_INDEX_PASSWORD: &'static str = "UV_INDEX_MY_INDEX_PASSWORD";
1265
1266    /// Used to set the GitHub fast-path url for tests.
1267    #[attr_hidden]
1268    #[attr_added_in("0.7.15")]
1269    pub const UV_GITHUB_FAST_PATH_URL: &'static str = "UV_GITHUB_FAST_PATH_URL";
1270
1271    /// Hide progress messages with non-deterministic order in tests.
1272    #[attr_hidden]
1273    #[attr_added_in("0.5.29")]
1274    pub const UV_TEST_NO_CLI_PROGRESS: &'static str = "UV_TEST_NO_CLI_PROGRESS";
1275
1276    /// Used to mock the current timestamp for relative `--exclude-newer` times in tests.
1277    /// Should be set to an RFC 3339 timestamp (e.g., `2025-11-21T12:00:00Z`).
1278    #[attr_hidden]
1279    #[attr_added_in("0.9.8")]
1280    pub const UV_TEST_CURRENT_TIMESTAMP: &'static str = "UV_TEST_CURRENT_TIMESTAMP";
1281
1282    /// When set to a timestamp, applies an `exclude-newer` filter to the versions
1283    /// considered available from indexes.
1284    ///
1285    /// This is used for reproducible resolver error messages. When `exclude-newer`
1286    /// is used, we retain information about the available versions to improve error
1287    /// messages. In contrast, versions published after this cutoff are considered
1288    /// non-existent.
1289    ///
1290    /// Should be set to an RFC 3339 timestamp (e.g., `2024-03-25T00:00:00Z`).
1291    #[attr_hidden]
1292    #[attr_added_in("0.11.7")]
1293    pub const UV_TEST_AVAILABLE_VERSION_CUTOFF: &'static str = "UV_TEST_AVAILABLE_VERSION_CUTOFF";
1294
1295    /// `.env` files from which to load environment variables when executing `uv run` commands.
1296    #[attr_added_in("0.4.30")]
1297    pub const UV_ENV_FILE: &'static str = "UV_ENV_FILE";
1298
1299    /// Ignore `.env` files when executing `uv run` commands.
1300    #[attr_added_in("0.4.30")]
1301    pub const UV_NO_ENV_FILE: &'static str = "UV_NO_ENV_FILE";
1302
1303    /// The URL from which to download uv using the standalone installer and `self update` feature,
1304    /// in lieu of the default GitHub URL.
1305    ///
1306    /// This more-specific installer source takes precedence over
1307    /// [`UV_ASTRAL_MIRROR_URL`](Self::UV_ASTRAL_MIRROR_URL) for `uv self update`.
1308    #[attr_added_in("0.5.0")]
1309    pub const UV_INSTALLER_GITHUB_BASE_URL: &'static str = "UV_INSTALLER_GITHUB_BASE_URL";
1310
1311    /// The URL from which to download uv using the standalone installer and `self update` feature,
1312    /// in lieu of the default GitHub Enterprise URL.
1313    ///
1314    /// This more-specific installer source takes precedence over
1315    /// [`UV_ASTRAL_MIRROR_URL`](Self::UV_ASTRAL_MIRROR_URL) for `uv self update`.
1316    #[attr_added_in("0.5.0")]
1317    pub const UV_INSTALLER_GHE_BASE_URL: &'static str = "UV_INSTALLER_GHE_BASE_URL";
1318
1319    /// The directory in which to install uv using the standalone installer and `self update` feature.
1320    /// Defaults to `~/.local/bin`.
1321    #[attr_added_in("0.5.0")]
1322    pub const UV_INSTALL_DIR: &'static str = "UV_INSTALL_DIR";
1323
1324    /// Used ephemeral environments like CI to install uv to a specific path while preventing
1325    /// the installer from modifying shell profiles or environment variables.
1326    #[attr_added_in("0.5.0")]
1327    pub const UV_UNMANAGED_INSTALL: &'static str = "UV_UNMANAGED_INSTALL";
1328
1329    /// The URL from which to download uv using the standalone installer. By default, installs from
1330    /// uv's GitHub Releases. `INSTALLER_DOWNLOAD_URL` is also supported as an alias, for backwards
1331    /// compatibility.
1332    #[attr_added_in("0.8.4")]
1333    pub const UV_DOWNLOAD_URL: &'static str = "UV_DOWNLOAD_URL";
1334
1335    /// Avoid modifying the `PATH` environment variable when installing uv using the standalone
1336    /// installer and `self update` feature. `INSTALLER_NO_MODIFY_PATH` is also supported as an
1337    /// alias, for backwards compatibility.
1338    #[attr_added_in("0.8.4")]
1339    pub const UV_NO_MODIFY_PATH: &'static str = "UV_NO_MODIFY_PATH";
1340
1341    /// Skip writing `uv` installer metadata files (e.g., `INSTALLER`, `REQUESTED`, and `direct_url.json`) to site-packages `.dist-info` directories.
1342    #[attr_added_in("0.5.7")]
1343    pub const UV_NO_INSTALLER_METADATA: &'static str = "UV_NO_INSTALLER_METADATA";
1344
1345    /// Enables fetching files stored in Git LFS when installing a package from a Git repository.
1346    #[attr_added_in("0.5.19")]
1347    pub const UV_GIT_LFS: &'static str = "UV_GIT_LFS";
1348
1349    /// Number of times that `uv run` has been recursively invoked. Used to guard against infinite
1350    /// recursion, e.g., when `uv run`` is used in a script shebang.
1351    #[attr_hidden]
1352    #[attr_added_in("0.5.31")]
1353    pub const UV_RUN_RECURSION_DEPTH: &'static str = "UV_RUN_RECURSION_DEPTH";
1354
1355    /// Number of times that `uv run` will allow recursive invocations, before exiting with an
1356    /// error.
1357    #[attr_hidden]
1358    #[attr_added_in("0.5.31")]
1359    pub const UV_RUN_MAX_RECURSION_DEPTH: &'static str = "UV_RUN_MAX_RECURSION_DEPTH";
1360
1361    /// Overrides terminal width used for wrapping. This variable is not read by uv directly.
1362    ///
1363    /// This is a quasi-standard variable, described, e.g., in `ncurses(3x)`.
1364    #[attr_added_in("0.6.2")]
1365    pub const COLUMNS: &'static str = "COLUMNS";
1366
1367    /// The CUDA driver version to assume when inferring the PyTorch backend (e.g., `550.144.03`).
1368    #[attr_hidden]
1369    #[attr_added_in("0.6.9")]
1370    pub const UV_CUDA_DRIVER_VERSION: &'static str = "UV_CUDA_DRIVER_VERSION";
1371
1372    /// The AMD GPU architecture to assume when inferring the PyTorch backend (e.g., `gfx1100`).
1373    #[attr_hidden]
1374    #[attr_added_in("0.7.14")]
1375    pub const UV_AMD_GPU_ARCHITECTURE: &'static str = "UV_AMD_GPU_ARCHITECTURE";
1376
1377    /// Equivalent to the `--torch-backend` command-line argument (e.g., `cpu`, `cu126`, or `auto`).
1378    #[attr_added_in("0.6.9")]
1379    pub const UV_TORCH_BACKEND: &'static str = "UV_TORCH_BACKEND";
1380
1381    /// Equivalent to the `--project` command-line argument.
1382    #[attr_added_in("0.4.4")]
1383    pub const UV_PROJECT: &'static str = "UV_PROJECT";
1384
1385    /// Equivalent to the `--no-project` command-line argument.
1386    #[attr_added_in("0.11.8")]
1387    pub const UV_NO_PROJECT: &'static str = "UV_NO_PROJECT";
1388
1389    /// Equivalent to the `--directory` command-line argument. `UV_WORKING_DIRECTORY` (added in
1390    /// v0.9.1) is also supported for backwards compatibility.
1391    #[attr_added_in("0.9.14")]
1392    pub const UV_WORKING_DIR: &'static str = "UV_WORKING_DIR";
1393
1394    /// Equivalent to the `--directory` command-line argument.
1395    #[attr_hidden]
1396    #[attr_added_in("0.9.1")]
1397    pub const UV_WORKING_DIRECTORY: &'static str = "UV_WORKING_DIRECTORY";
1398
1399    /// Disable GitHub-specific requests that allow uv to skip `git fetch` in some circumstances.
1400    #[attr_added_in("0.7.13")]
1401    pub const UV_NO_GITHUB_FAST_PATH: &'static str = "UV_NO_GITHUB_FAST_PATH";
1402
1403    /// Authentication token for Hugging Face requests. When set, uv will use this token
1404    /// when making requests to `https://huggingface.co/` and any subdomains.
1405    #[attr_added_in("0.8.1")]
1406    pub const HF_TOKEN: &'static str = "HF_TOKEN";
1407
1408    /// Disable Hugging Face authentication, even if `HF_TOKEN` is set.
1409    #[attr_added_in("0.8.1")]
1410    pub const UV_NO_HF_TOKEN: &'static str = "UV_NO_HF_TOKEN";
1411
1412    /// The URL to treat as an S3-compatible storage endpoint. Requests to this endpoint
1413    /// will be signed using AWS Signature Version 4 based on the `AWS_ACCESS_KEY_ID`,
1414    /// `AWS_SECRET_ACCESS_KEY`, `AWS_PROFILE`, and `AWS_CONFIG_FILE` environment variables.
1415    #[attr_added_in("0.8.21")]
1416    pub const UV_S3_ENDPOINT_URL: &'static str = "UV_S3_ENDPOINT_URL";
1417
1418    /// The URL to treat as a GCS-compatible storage endpoint. Requests to this endpoint
1419    /// will be signed using Google Cloud authentication based on the `GOOGLE_APPLICATION_CREDENTIALS`
1420    /// environment variable or Application Default Credentials.
1421    #[attr_added_in("0.9.26")]
1422    pub const UV_GCS_ENDPOINT_URL: &'static str = "UV_GCS_ENDPOINT_URL";
1423
1424    /// The URL to treat as an Azure Blob Storage endpoint. Requests to this endpoint will be signed
1425    /// using Azure credentials from the default credential chain, including Azure CLI credentials
1426    /// and workload identity.
1427    #[attr_added_in("0.11.14")]
1428    pub const UV_AZURE_ENDPOINT_URL: &'static str = "UV_AZURE_ENDPOINT_URL";
1429
1430    /// The URL of the pyx Simple API server.
1431    #[attr_added_in("0.8.15")]
1432    pub const PYX_API_URL: &'static str = "PYX_API_URL";
1433
1434    /// The domain of the pyx CDN.
1435    #[attr_added_in("0.8.15")]
1436    pub const PYX_CDN_DOMAIN: &'static str = "PYX_CDN_DOMAIN";
1437
1438    /// The pyx API key (e.g., `sk-pyx-...`).
1439    #[attr_added_in("0.8.15")]
1440    pub const PYX_API_KEY: &'static str = "PYX_API_KEY";
1441
1442    /// The pyx API key, for backwards compatibility.
1443    #[attr_hidden]
1444    #[attr_added_in("0.8.15")]
1445    pub const UV_API_KEY: &'static str = "UV_API_KEY";
1446
1447    /// The pyx authentication token (e.g., `eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...`), as output by `uv auth token`.
1448    #[attr_added_in("0.8.15")]
1449    pub const PYX_AUTH_TOKEN: &'static str = "PYX_AUTH_TOKEN";
1450
1451    /// The pyx authentication token, for backwards compatibility.
1452    #[attr_hidden]
1453    #[attr_added_in("0.8.15")]
1454    pub const UV_AUTH_TOKEN: &'static str = "UV_AUTH_TOKEN";
1455
1456    /// Specifies the directory where uv stores pyx credentials.
1457    #[attr_added_in("0.8.15")]
1458    pub const PYX_CREDENTIALS_DIR: &'static str = "PYX_CREDENTIALS_DIR";
1459
1460    /// The AWS region to use when signing S3 requests.
1461    #[attr_added_in("0.8.21")]
1462    pub const AWS_REGION: &'static str = "AWS_REGION";
1463
1464    /// The default AWS region to use when signing S3 requests, if `AWS_REGION` is not set.
1465    #[attr_added_in("0.8.21")]
1466    pub const AWS_DEFAULT_REGION: &'static str = "AWS_DEFAULT_REGION";
1467
1468    /// The AWS access key ID to use when signing S3 requests.
1469    #[attr_added_in("0.8.21")]
1470    pub const AWS_ACCESS_KEY_ID: &'static str = "AWS_ACCESS_KEY_ID";
1471
1472    /// The AWS secret access key to use when signing S3 requests.
1473    #[attr_added_in("0.8.21")]
1474    pub const AWS_SECRET_ACCESS_KEY: &'static str = "AWS_SECRET_ACCESS_KEY";
1475
1476    /// The AWS session token to use when signing S3 requests.
1477    #[attr_added_in("0.8.21")]
1478    pub const AWS_SESSION_TOKEN: &'static str = "AWS_SESSION_TOKEN";
1479
1480    /// The AWS profile to use when signing S3 requests.
1481    #[attr_added_in("0.8.21")]
1482    pub const AWS_PROFILE: &'static str = "AWS_PROFILE";
1483
1484    /// The AWS config file to use when signing S3 requests.
1485    #[attr_added_in("0.8.21")]
1486    pub const AWS_CONFIG_FILE: &'static str = "AWS_CONFIG_FILE";
1487
1488    /// The AWS shared credentials file to use when signing S3 requests.
1489    #[attr_added_in("0.8.21")]
1490    pub const AWS_SHARED_CREDENTIALS_FILE: &'static str = "AWS_SHARED_CREDENTIALS_FILE";
1491
1492    /// Avoid verifying that wheel filenames match their contents when installing wheels. This
1493    /// is not recommended, as wheels with inconsistent filenames should be considered invalid and
1494    /// corrected by the relevant package maintainers; however, this option can be used to work
1495    /// around invalid artifacts in rare cases.
1496    #[attr_added_in("0.8.23")]
1497    pub const UV_SKIP_WHEEL_FILENAME_CHECK: &'static str = "UV_SKIP_WHEEL_FILENAME_CHECK";
1498
1499    /// Suppress output from the build backend when building source distributions, even in the event
1500    /// of build failures.
1501    #[attr_added_in("0.9.15")]
1502    pub const UV_HIDE_BUILD_OUTPUT: &'static str = "UV_HIDE_BUILD_OUTPUT";
1503
1504    /// The time in seconds uv waits for a file lock to become available.
1505    ///
1506    /// Defaults to 300s (5 min).
1507    #[attr_added_in("0.9.4")]
1508    pub const UV_LOCK_TIMEOUT: &'static str = "UV_LOCK_TIMEOUT";
1509}