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147 lines
4 KiB
Markdown
147 lines
4 KiB
Markdown
# Bosion
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_Gather build information for verbose versions flags._
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- **[API documentation][docs]**.
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- Licensed under [Apache 2.0][license] or [MIT](https://passcod.mit-license.org).
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- Status: maintained.
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[docs]: https://docs.rs/bosion
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[license]: ../../LICENSE
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## Quick start
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In your `Cargo.toml`:
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```toml
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[build-dependencies]
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bosion = "1.0.3"
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```
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In your `build.rs`:
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```rust ,no_run
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fn main() {
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bosion::gather();
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}
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```
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In your `src/main.rs`:
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```rust ,ignore
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include!(env!("BOSION_PATH"));
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fn main() {
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// default output, like rustc -Vv
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println!("{}", Bosion::LONG_VERSION);
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// with additional fields
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println!("{}", Bosion::long_version_with(&[
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("custom data", "value"),
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("LLVM version", "15.0.6"),
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]));
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// enabled features like +feature +an-other
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println!("{}", Bosion::CRATE_FEATURE_STRING);
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// the raw data
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println!("{}", Bosion::GIT_COMMIT_HASH);
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println!("{}", Bosion::GIT_COMMIT_SHORTHASH);
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println!("{}", Bosion::GIT_COMMIT_DATE);
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println!("{}", Bosion::GIT_COMMIT_DATETIME);
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println!("{}", Bosion::CRATE_VERSION);
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println!("{:?}", Bosion::CRATE_FEATURES);
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println!("{}", Bosion::BUILD_DATE);
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println!("{}", Bosion::BUILD_DATETIME);
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}
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```
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## Advanced usage
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Generating a struct with public visibility:
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```rust ,no_run
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// build.rs
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bosion::gather_pub();
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```
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Customising the output file and struct names:
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```rust ,no_run
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// build.rs
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bosion::gather_to("buildinfo.rs", "Build", /* public? */ false);
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```
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Outputting build-time environment variables instead of source:
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```rust ,ignore
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// build.rs
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bosion::gather_to_env();
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// src/main.rs
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fn main() {
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println!("{}", env!("BOSION_GIT_COMMIT_HASH"));
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println!("{}", env!("BOSION_GIT_COMMIT_SHORTHASH"));
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println!("{}", env!("BOSION_GIT_COMMIT_DATE"));
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println!("{}", env!("BOSION_GIT_COMMIT_DATETIME"));
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println!("{}", env!("BOSION_BUILD_DATE"));
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println!("{}", env!("BOSION_BUILD_DATETIME"));
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println!("{}", env!("BOSION_CRATE_VERSION"));
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println!("{}", env!("BOSION_CRATE_FEATURES")); // comma-separated
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}
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```
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Custom env prefix:
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```rust ,no_run
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// build.rs
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bosion::gather_to_env_with_prefix("MYAPP_");
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```
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## Features
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- `reproducible`: reads [`SOURCE_DATE_EPOCH`](https://reproducible-builds.org/docs/source-date-epoch/) (default).
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- `git`: enables gathering git information (default).
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- `std`: enables the `long_version_with` method (default).
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Specifically, this is about the downstream crate's std support, not Bosion's, which always requires std.
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## Why not...?
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- [bugreport](https://github.com/sharkdp/bugreport): runtime library, for bug information.
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- [git-testament](https://github.com/kinnison/git-testament): uses the `git` CLI instead of gitoxide.
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- [human-panic](https://github.com/rust-cli/human-panic): runtime library, for panics.
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- [shadow-rs](https://github.com/baoyachi/shadow-rs): uses libgit2 instead of gitoxide, doesn't rebuild on git changes.
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- [vergen](https://github.com/rustyhorde/vergen): uses the `git` CLI instead of gitoxide.
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Bosion also requires no dependencies outside of build.rs, and was specifically made for crates
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installed in a variety of ways, like with `cargo install`, from pre-built binary, from source with
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git, or from source without git (like a tarball), on a variety of platforms. Its default output with
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[clap](https://clap.rs) is almost exactly like `rustc -Vv`.
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## Examples
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The [examples](./examples) directory contains a practical and runnable [clap-based example](./examples/clap/), as well
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as several other crates which are actually used for integration testing.
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Here is the output for the Watchexec CLI:
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```plain
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watchexec 1.21.1 (5026793 2023-03-05)
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commit-hash: 5026793a12ff895edf2dafb92111e7bd1767650e
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commit-date: 2023-03-05
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build-date: 2023-03-05
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release: 1.21.1
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features:
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```
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For comparison, here's `rustc -Vv`:
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```plain
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rustc 1.67.1 (d5a82bbd2 2023-02-07)
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binary: rustc
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commit-hash: d5a82bbd26e1ad8b7401f6a718a9c57c96905483
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commit-date: 2023-02-07
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host: x86_64-unknown-linux-gnu
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release: 1.67.1
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LLVM version: 15.0.6
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```
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