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<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></li></ul></div></div> <!----></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Try</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/my-first-function/" class="sidebar-link">My First Function</a></li><li><a href="/docs/functions-in-python/" class="sidebar-link">Write Functions in Python</a></li><li><a href="/docs/builtin-functions/" class="sidebar-link">How to Add Built-in Functions</a></li><li><a href="/docs/azure-confidential-computing/" class="sidebar-link">Deploying Teaclave on Azure Confidential Computing Virtual Machines</a></li><li><a href="/docs/executing-wasm/" class="sidebar-link">Executing WebAssembly in Teaclave</a></li><li><a href="/docs/inference-with-tvm/" class="sidebar-link">Inference Task with TVM in Teaclave</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Design</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/threat-model/" class="sidebar-link">Threat Model</a></li><li><a href="/docs/mutual-attestation/" class="sidebar-link">Mutual Attestation: Why and How</a></li><li><a href="/docs/access-control/" class="sidebar-link">Access Control in Teaclave</a></li><li><a href="/docs/build-system/" class="sidebar-link">Build System</a></li><li><a href="/docs/service-internals/" class="sidebar-link">Teaclave Service Internals</a></li><li><a href="/docs/adding-executors/" class="sidebar-link">Adding Executors</a></li><li><a href="/docs/papers-talks/" class="sidebar-link">Papers, Talks, and Related Articles</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading open"><span>Contribute</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/release-guide/" class="sidebar-link">Release Guide</a></li><li><a href="/docs/development-tips/" class="sidebar-link">Development Tips</a></li><li><a href="/docs/rust-guildeline/" aria-current="page" class="active sidebar-link">Rust Development Guideline</a></li></ul></section></li><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>Codebase</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/codebase/attestation/" class="sidebar-link">Attestation in Teaclave</a></li><li><a href="/docs/codebase/binder/" class="sidebar-link">Binder</a></li><li><a href="/docs/codebase/cli/" class="sidebar-link">Teaclave Command Line Tool</a></li><li><a href="/docs/codebase/common/" class="sidebar-link">Common Libraries</a></li><li><a href="/docs/codebase/config/" class="sidebar-link">Configurations in Teaclave</a></li><li><a href="/docs/codebase/crypto/" class="sidebar-link">Crypto Primitives</a></li><li><a href="/docs/codebase/dcap/" class="sidebar-link">Data Center Attestation Service</a></li><li><a href="/docs/codebase/docker/" class="sidebar-link">Teaclave Docker</a></li><li><a href="/docs/codebase/examples/" class="sidebar-link">Examples</a></li><li><a href="/docs/codebase/executor/" class="sidebar-link">Function Executors</a></li><li><a href="/docs/codebase/file-agent/" class="sidebar-link">File Agent</a></li><li><a href="/docs/codebase/function/" class="sidebar-link">Built-in Functions</a></li><li><a href="/docs/codebase/rpc/" class="sidebar-link">RPC</a></li><li><a href="/docs/codebase/runtime/" class="sidebar-link">Executor Runtime</a></li><li><a href="/docs/codebase/sdk/" class="sidebar-link">Client SDK</a></li><li><a href="/docs/codebase/services/" class="sidebar-link">Teaclave Services</a></li><li><a href="/docs/codebase/tests/" class="sidebar-link">Test Harness and Test Cases</a></li><li><a href="/docs/codebase/third-party/" class="sidebar-link">Third-Party Dependency Vendoring</a></li><li><a href="/docs/codebase/tools/" class="sidebar-link">Tools</a></li><li><a href="/docs/codebase/types/" class="sidebar-link">Types</a></li><li><a href="/docs/codebase/worker/" class="sidebar-link">Teaclave Worker</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="rust-development-guideline"><a href="#rust-development-guideline" class="header-anchor">#</a> Rust Development Guideline</h1> <p>This doc defines some guidelines for developing Teaclave in Rust.</p> <h2 id="style"><a href="#style" class="header-anchor">#</a> Style</h2> <p>We use <code>rustfmt</code> and <code>clippy</code> to format and lint all Rust code. Mostly, we use
the default configurations, but there are a couple of custom settings and lint
exceptions. The exceptions should be defined along with the code. Our CI will
check the format/lint issues and deny all warnings by default. Simply run <code>make format</code> to format all code and <code>make CLP=1</code> to lint code before submitting a PR.
If you still have some doubts of the <code>clippy</code> error, feel free to point out and
add an exception.</p> <h2 id="elegant-apis"><a href="#elegant-apis" class="header-anchor">#</a> Elegant APIs</h2> <p>Elegantly designed functions and APIs will make the project readable and
user-friendly. Basically, we follow naming conventions and API design patterns
of Rust standard library. There's no official guideline, but here are several
articles or docs for reference:</p> <ul><li><a href="https://rust-lang.github.io/api-guidelines/" target="_blank" rel="noopener noreferrer">Rust API guidelines</a></li> <li><a href="https://github.com/rust-unofficial/patterns" target="_blank" rel="noopener noreferrer">Rust Design Patterns</a></li> <li><a href="https://deterministic.space/elegant-apis-in-rust.html#what-makes-an-api-elegant" target="_blank" rel="noopener noreferrer">Elegant Library APIs in Rust</a></li></ul> <h2 id="unsafe-rust"><a href="#unsafe-rust" class="header-anchor">#</a> Unsafe Rust</h2> <p>Using unsafe Rust is extremely dangerous, and may break Rust's strong
memory-safety guarantees. Therefore, we want to keep unsafe Rust as minimal as
possible. Sometimes (very rare) using unsafe Rust can significantly improve
performance, the unsafe code should be <em>well documented</em> and <em>explain the
rationales</em>. For contributors and reviewers, pay attention to the unsafe code
and carefully check whether the pre-conditions and post-conditions still
hold.</p> <h2 id="error-handling"><a href="#error-handling" class="header-anchor">#</a> Error Handling</h2> <p>Using <code>unwrap</code> or <code>expect</code> to get a value from an optional type may introduce
runtime panic. Therefore, properly using the error handling mechanism provided
by Rust can make the system robust and clean. In some cases, optional value can
never be <code>None</code> internally, <code>unwrap</code> can be used with a comment explaining the
assumptions and reasons. The same rule also applies to <code>panic</code> and similar
functions which may cause runtime panic. One exception is to use <code>unwrap</code> and
<code>expect</code> in tests, while <code>expect</code> is better because it will show a message to
help debugging.</p> <h2 id="third-party-crates"><a href="#third-party-crates" class="header-anchor">#</a> Third-Party Crates</h2> <p>To ensure the security, stability and compatibility of upstream crates, all
third-party crates (especially for ported SGX-compatible crates) used in
Teaclave are vendored in the <code>third_party</code> directory. Please refer to the
<code>crates-sgx</code> and <code>crates-io</code> repo and choose specific versions of vendored
crates.</p></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">Last Updated:</span> <span class="time">6/19/2020, 10:13:12 PM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev">
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Apache Teaclave (incubating) is an effort undergoing incubation at The Apache
Software Foundation (ASF), sponsored by the Apache Incubator.
Incubation is required of all newly accepted projects until a further review
indicates that the infrastructure, communications, and decision making process
have stabilized in a manner consistent with other successful ASF projects. While
incubation status is not necessarily a reflection of the completeness or
stability of the code, it does indicate that the project has yet to be fully
endorsed by the ASF.
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