# vergen
Generate `build`, `git`, `rustc`, `cargo`, and `sysinfo` related [`cargo:rustc-env`](https://doc.rust-lang.org/cargo/reference/build-scripts.html#rustc-env) instructions via [`build.rs`](https://doc.rust-lang.org/cargo/reference/build-scripts.html) for use in your code via the [`env!`](https://doc.rust-lang.org/std/macro.env.html) macro or [`option_env!`](https://doc.rust-lang.org/std/macro.option_env.html) macro.
## Sponsors
Special thanks to the sponsors of this project
* [tryretool](https://github.com/tryretool)
## Release 7.0 Breaking Changes
* `chrono` has been replaced with `time`. The `time` crate is better maintained.
* The local timezone support in the `build` and `git` features has been moved behind a `local_offset` feature flag. This is
due to a [potential segfault](https://github.com/rustsec/advisory-db/blob/main/crates/time/RUSTSEC-2020-0071.md) when using `localtime_r` as the `time` crate does.
* To build with the `local_offset` feature, you must also explicitly delare that you are acknowledging the potential unsoundness by
setting `RUSTFLAGS="--cfg unsound_local_offset"`. Per the `time` docs this isn't tested, so use with extreme caution.
## Notes about `git 0.15`
This update to git picked up some [security related features](https://github.blog/2022-04-12-git-security-vulnerability-announced/). In docker environments especially, this requires a `safe.directory` configuration. There are a couple methods for achieving this.
1. If you control the build, you can add `git config --global --add safe.directory /workspace` to the build file.
2. If you do not control the docker build, you can add `git config --global --add safe.directory /workspace &&` before the actual command you are running when using docker run.
3. If you do not control the docker build, you can mount a `.gitconfig` file at `/root` that includes the `safe.directory` configuration. I use this method myself when building static binaries with clux/muslrust.
````docker run -v cargo-cache:/root/.cargo/registry -v (pwd):/volume -v ~/.gitconfig:/root/.gitconfig:ro --rm -t clux/muslrust:stable cargo build --release````
See https://github.com/rustyhorde/vergen/pull/126 for more discussion on the topic. If the solutions above do not work for your usecase, you can pin your `vergen` version to 7.4.3. Feel free to open issues about this. If it comes up enough, I could support a version of `vergen` with the older `git2` dependency.
## MSRV
The current minimum supported rust version is 1.63.0
## Current Release
[](https://docs.rs/vergen)
[](https://crates.io/crates/vergen)
[](https://crates.io/crates/vergen)
[](https://crates.io/crates/vergen)
[](https://codecov.io/gh/rustyhorde/vergen)
[](https://github.com/rustyhorde/vergen/actions)
[](https://github.com/sponsors/CraZySacX)
## Example Usage
See the documentation at [docs.rs](https://docs.rs/vergen) for example usage
## Environment Variables
A full list of environment variables that can be generated are listed in the following table.
| `VERGEN_BUILD_DATE` | 2021-02-25 |
| `VERGEN_BUILD_TIME` | 23:28:39.493201 |
| `VERGEN_BUILD_TIMESTAMP` | 2021-02-25T23:28:39.493201+00:00 |
| `VERGEN_BUILD_SEMVER` | 5.0.0 |
| `VERGEN_GIT_BRANCH` | feature/fun |
| `VERGEN_GIT_COMMIT_AUTHOR_EMAIL` | janedoe@email.com |
| `VERGEN_GIT_COMMIT_AUTHOR_NAME` | Jane Doe |
| `VERGEN_GIT_COMMIT_COUNT` | 330 |
| `VERGEN_GIT_COMMIT_DATE` | 2021-02-24 |
| `VERGEN_GIT_COMMIT_MESSAGE` | feat: add commit messages |
| `VERGEN_GIT_COMMIT_TIME` | 20:55:21 |
| `VERGEN_GIT_COMMIT_TIMESTAMP` | 2021-02-24T20:55:21+00:00 |
| `VERGEN_GIT_SEMVER` | 5.0.0-2-gf49246c |
| `VERGEN_GIT_SHA` | f49246ce334567bff9f950bfd0f3078184a2738a |
| `VERGEN_RUSTC_CHANNEL` | nightly |
| `VERGEN_RUSTC_COMMIT_DATE` | 2021-02-24 |
| `VERGEN_RUSTC_COMMIT_HASH` | a8486b64b0c87dabd045453b6c81500015d122d6 |
| `VERGEN_RUSTC_HOST_TRIPLE` | x86_64-apple-darwin |
| `VERGEN_RUSTC_LLVM_VERSION` | 11.0 |
| `VERGEN_RUSTC_SEMVER` | 1.52.0-nightly |
| `VERGEN_CARGO_FEATURES` | git,build |
| `VERGEN_CARGO_PROFILE` | debug |
| `VERGEN_CARGO_TARGET_TRIPLE` | x86_64-unknown-linux-gnu |
| `VERGEN_SYSINFO_NAME` | Manjaro Linux |
| `VERGEN_SYSINFO_OS_VERSION` | Linux Manjaro Linux |
| `VERGEN_SYSINFO_USER` | Yoda |
| `VERGEN_SYSINFO_TOTAL_MEMORY` | 33 GB |
| `VERGEN_SYSINFO_CPU_VENDOR` | Authentic AMD |
| `VERGEN_SYSINFO_CPU_CORE_COUNT` | 8 |
| `VERGEN_SYSINFO_CPU_NAME` | cpu0,cpu1,cpu2,cpu3,cpu4,cpu5,cpu6,cpu7 |
| `VERGEN_SYSINFO_CPU_BRAND` | AMD Ryzen Threadripper 1900X 8-Core Processor |
| `VERGEN_SYSINFO_CPU_FREQUENCY` | 3792 |
## Contributing
See the documentation at [CONTRIBUTING.md](CONTRIBUTING.md)
## License
Licensed under either of
* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or https://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or https://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any
additional terms or conditions.