mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-24 05:33:27 +00:00
100 lines
3.3 KiB
Rust
100 lines
3.3 KiB
Rust
//! lint on missing cargo common metadata
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use crate::utils::span_lint;
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use rustc::lint::{EarlyContext, EarlyLintPass, LintArray, LintPass};
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use rustc::{declare_lint_pass, declare_tool_lint};
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use syntax::{ast::*, source_map::DUMMY_SP};
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use cargo_metadata;
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declare_clippy_lint! {
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/// **What it does:** Checks to see if all common metadata is defined in
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/// `Cargo.toml`. See: https://rust-lang-nursery.github.io/api-guidelines/documentation.html#cargotoml-includes-all-common-metadata-c-metadata
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///
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/// **Why is this bad?** It will be more difficult for users to discover the
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/// purpose of the crate, and key information related to it.
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///
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/// **Known problems:** None.
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///
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/// **Example:**
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/// ```toml
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/// # This `Cargo.toml` is missing an authors field:
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/// [package]
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/// name = "clippy"
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/// version = "0.0.212"
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/// description = "A bunch of helpful lints to avoid common pitfalls in Rust"
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/// repository = "https://github.com/rust-lang/rust-clippy"
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/// readme = "README.md"
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/// license = "MIT/Apache-2.0"
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/// keywords = ["clippy", "lint", "plugin"]
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/// categories = ["development-tools", "development-tools::cargo-plugins"]
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/// ```
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pub CARGO_COMMON_METADATA,
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cargo,
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"common metadata is defined in `Cargo.toml`"
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}
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fn warning(cx: &EarlyContext<'_>, message: &str) {
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span_lint(cx, CARGO_COMMON_METADATA, DUMMY_SP, message);
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}
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fn missing_warning(cx: &EarlyContext<'_>, package: &cargo_metadata::Package, field: &str) {
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let message = format!("package `{}` is missing `{}` metadata", package.name, field);
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warning(cx, &message);
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}
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fn is_empty_str(value: &Option<String>) -> bool {
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match value {
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None => true,
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Some(value) if value.is_empty() => true,
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_ => false,
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}
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}
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fn is_empty_vec(value: &[String]) -> bool {
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// This works because empty iterators return true
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value.iter().all(std::string::String::is_empty)
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}
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declare_lint_pass!(CargoCommonMetadata => [CARGO_COMMON_METADATA]);
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impl EarlyLintPass for CargoCommonMetadata {
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fn check_crate(&mut self, cx: &EarlyContext<'_>, _: &Crate) {
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let metadata = if let Ok(metadata) = cargo_metadata::MetadataCommand::new().no_deps().exec() {
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metadata
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} else {
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warning(cx, "could not read cargo metadata");
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return;
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};
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for package in metadata.packages {
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if is_empty_vec(&package.authors) {
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missing_warning(cx, &package, "package.authors");
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}
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if is_empty_str(&package.description) {
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missing_warning(cx, &package, "package.description");
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}
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if is_empty_str(&package.license) {
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missing_warning(cx, &package, "package.license");
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}
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if is_empty_str(&package.repository) {
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missing_warning(cx, &package, "package.repository");
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}
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if is_empty_str(&package.readme) {
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missing_warning(cx, &package, "package.readme");
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}
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if is_empty_vec(&package.keywords) {
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missing_warning(cx, &package, "package.keywords");
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}
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if is_empty_vec(&package.categories) {
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missing_warning(cx, &package, "package.categories");
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}
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}
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}
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}
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