52 lines
1.7 KiB
Rust
52 lines
1.7 KiB
Rust
use clippy_utils::diagnostics::span_lint_and_sugg;
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use clippy_utils::source::snippet;
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use rustc_errors::Applicability;
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use rustc_hir::{Expr, ExprKind};
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use rustc_lint::{LateContext, LateLintPass};
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use rustc_session::declare_lint_pass;
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use rustc_span::sym;
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declare_clippy_lint! {
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/// ### What it does
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/// Checks usage of `std::fs::create_dir` and suggest using `std::fs::create_dir_all` instead.
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///
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/// ### Why is this bad?
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/// Sometimes `std::fs::create_dir` is mistakenly chosen over `std::fs::create_dir_all`.
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///
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/// ### Example
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/// ```rust,ignore
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/// std::fs::create_dir("foo");
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/// ```
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///
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/// Use instead:
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/// ```rust,ignore
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/// std::fs::create_dir_all("foo");
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/// ```
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#[clippy::version = "1.48.0"]
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pub CREATE_DIR,
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restriction,
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"calling `std::fs::create_dir` instead of `std::fs::create_dir_all`"
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}
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declare_lint_pass!(CreateDir => [CREATE_DIR]);
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impl LateLintPass<'_> for CreateDir {
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fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) {
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if let ExprKind::Call(func, [arg, ..]) = expr.kind
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&& let ExprKind::Path(ref path) = func.kind
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&& let Some(def_id) = cx.qpath_res(path, func.hir_id).opt_def_id()
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&& cx.tcx.is_diagnostic_item(sym::fs_create_dir, def_id)
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{
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span_lint_and_sugg(
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cx,
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CREATE_DIR,
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expr.span,
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"calling `std::fs::create_dir` where there may be a better way",
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"consider calling `std::fs::create_dir_all` instead",
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format!("create_dir_all({})", snippet(cx, arg.span, "..")),
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Applicability::MaybeIncorrect,
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);
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}
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}
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}
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