feat(lint): add require-node-prefix rule

cli/tools/lint/rules/mod.rs

@@ -18,6 +18,7 @@ use crate::resolver::CliSloppyImportsResolver;
 
 mod no_sloppy_imports;
 mod no_slow_types;
+mod require_node_prefix;
 
 // used for publishing
 pub use no_slow_types::collect_no_slow_type_diagnostics;
@@ -177,12 +178,17 @@ impl LintRuleProvider {
     maybe_config_file: Option<&ConfigFile>,
   ) -> ConfiguredRules {
     let deno_lint_rules = deno_lint::rules::get_all_rules();
-    let cli_lint_rules = vec![CliLintRule(CliLintRuleKind::Extended(
-      Box::new(no_sloppy_imports::NoSloppyImportsRule::new(
-        self.sloppy_imports_resolver.clone(),
-        self.workspace_resolver.clone(),
-      )),
-    ))];
+    let cli_lint_rules = vec![
+      CliLintRule(CliLintRuleKind::Extended(Box::new(
+        no_sloppy_imports::NoSloppyImportsRule::new(
+          self.sloppy_imports_resolver.clone(),
+          self.workspace_resolver.clone(),
+        ),
+      ))),
+      CliLintRule(CliLintRuleKind::Extended(Box::new(
+        require_node_prefix::RequireNodePrefix::new(),
+      ))),
+    ];
     let cli_graph_rules = vec![CliLintRule(CliLintRuleKind::Package(
       Box::new(no_slow_types::NoSlowTypesRule),
     ))];

cli/tools/lint/rules/require_node_prefix.md

@@ -0,0 +1,19 @@
+Enforces the use of the `node:` specifier for Node built-in modules.
+
+Deno requires Node built-in modules to be imported with the `node:` specifier.
+
+### Invalid:
+
+```typescript
+import * as path from "path";
+import * as fs from "fs";
+import * as fsPromises from "fs/promises";
+```
+
+### Valid:
+
+```typescript
+import * as path from "node:path";
+import * as fs from "node:fs";
+import * as fsPromises from "node:fs/promises";
+```

cli/tools/lint/rules/require_node_prefix.rs

@@ -0,0 +1,246 @@
+use std::borrow::Cow;
+
+// Copyright 2020-2021 the Deno authors. All rights reserved. MIT license.
+use super::ExtendedLintRule;
+
+use deno_ast::view as ast_view;
+use deno_ast::SourceRange;
+use deno_ast::SourceRanged;
+use deno_lint::context::Context;
+use deno_lint::diagnostic::LintFix;
+use deno_lint::diagnostic::LintFixChange;
+use deno_lint::rules::LintRule;
+
+#[derive(Debug)]
+pub struct RequireNodePrefix;
+
+const CODE: &str = "require-node-prefix";
+const MESSAGE: &str = "built-in Node modules require the \"node:\" specifier";
+const HINT: &str = "Add \"node:\" prefix in front of the import specifier";
+const FIX_DESC: &str = "Add \"node:\" prefix";
+const DOCS_URL: &str =
+  "https://docs.deno.com/runtime/manual/node/migrate/#node.js-built-ins";
+
+impl ExtendedLintRule for RequireNodePrefix {
+  fn supports_incremental_cache(&self) -> bool {
+    true
+  }
+
+  fn help_docs_url(&self) -> std::borrow::Cow<'static, str> {
+    Cow::Borrowed(DOCS_URL)
+  }
+
+  fn into_base(self: Box<Self>) -> Box<dyn deno_lint::rules::LintRule> {
+    self
+  }
+}
+
+impl LintRule for RequireNodePrefix {
+  fn tags(&self) -> &'static [&'static str] {
+    &["recommended"]
+  }
+
+  fn code(&self) -> &'static str {
+    CODE
+  }
+
+  fn docs(&self) -> &'static str {
+    include_str!("require_node_prefix.md")
+  }
+
+  fn lint_program_with_ast_view<'view>(
+    &self,
+    context: &mut Context<'view>,
+    program: deno_lint::Program<'view>,
+  ) {
+    NodeBuiltinsSpecifierGlobalHandler.traverse(program, context);
+  }
+}
+
+struct NodeBuiltinsSpecifierGlobalHandler;
+
+impl NodeBuiltinsSpecifierGlobalHandler {
+  fn add_diagnostic(&self, ctx: &mut Context, src: &str, range: SourceRange) {
+    let specifier = format!(r#""node:{}""#, src);
+
+    ctx.add_diagnostic_with_fixes(
+      range,
+      CODE,
+      MESSAGE,
+      Some(HINT.to_string()),
+      vec![LintFix {
+        description: FIX_DESC.into(),
+        changes: vec![LintFixChange {
+          new_text: specifier.into(),
+          range,
+        }],
+      }],
+    );
+  }
+}
+
+impl Handler for NodeBuiltinsSpecifierGlobalHandler {
+  fn import_decl(&mut self, decl: &ast_view::ImportDecl, ctx: &mut Context) {
+    let src = decl.src.inner.value.as_str();
+    if is_bare_node_builtin(src) {
+      self.add_diagnostic(ctx, src, decl.src.range());
+    }
+  }
+
+  fn call_expr(&mut self, expr: &ast_view::CallExpr, ctx: &mut Context) {
+    if let ast_view::Callee::Import(_) = expr.callee {
+      if let Some(src_expr) = expr.args.first() {
+        if let ast_view::Expr::Lit(lit) = src_expr.expr {
+          if let ast_view::Lit::Str(str_value) = lit {
+            let src = str_value.inner.value.as_str();
+            if is_bare_node_builtin(src) {
+              self.add_diagnostic(ctx, src, lit.range());
+            }
+          }
+        }
+      }
+    }
+  }
+}
+
+// Should match https://nodejs.org/api/module.html#modulebuiltinmodules
+fn is_bare_node_builtin(src: &str) -> bool {
+  matches!(
+    src,
+    "assert"
+      | "assert/strict"
+      | "async_hooks"
+      | "buffer"
+      | "child_process"
+      | "cluster"
+      | "console"
+      | "constants"
+      | "crypto"
+      | "dgram"
+      | "diagnostics_channel"
+      | "dns"
+      | "dns/promises"
+      | "domain"
+      | "events"
+      | "fs"
+      | "fs/promises"
+      | "http"
+      | "http2"
+      | "https"
+      | "inspector"
+      | "inspector/promises"
+      | "module"
+      | "net"
+      | "os"
+      | "path"
+      | "path/posix"
+      | "path/win32"
+      | "perf_hooks"
+      | "process"
+      | "punycode"
+      | "querystring"
+      | "readline"
+      | "readline/promises"
+      | "repl"
+      | "stream"
+      | "stream/consumers"
+      | "stream/promises"
+      | "stream/web"
+      | "string_decoder"
+      | "sys"
+      | "timers"
+      | "timers/promises"
+      | "tls"
+      | "trace_events"
+      | "tty"
+      | "url"
+      | "util"
+      | "util/types"
+      | "v8"
+      | "vm"
+      | "wasi"
+      | "worker_threads"
+      | "zlib"
+  )
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn node_specifier_valid() {
+    assert_lint_ok! {
+      NodeBuiltinsSpecifier,
+      r#"import "node:path";"#,
+      r#"import "node:fs";"#,
+      r#"import "node:fs/promises";"#,
+
+      r#"import * as fs from "node:fs";"#,
+      r#"import * as fsPromises from "node:fs/promises";"#,
+      r#"import fsPromises from "node:fs/promises";"#,
+
+      r#"await import("node:fs");"#,
+      r#"await import("node:fs/promises");"#,
+    };
+  }
+
+  #[test]
+  fn node_specifier_invalid() {
+    assert_lint_err! {
+      NodeBuiltinsSpecifier,
+      MESSAGE,
+      HINT,
+      r#"import "path";"#: [
+        {
+          col: 7,
+          fix: (FIX_DESC, r#"import "node:path";"#),
+        }
+      ],
+      r#"import "fs";"#: [
+        {
+          col: 7,
+          fix: (FIX_DESC, r#"import "node:fs";"#),
+        }
+      ],
+      r#"import "fs/promises";"#: [
+        {
+          col: 7,
+          fix: (FIX_DESC, r#"import "node:fs/promises";"#),
+        }
+      ],
+
+      r#"import * as fs from "fs";"#: [
+        {
+          col: 20,
+          fix: (FIX_DESC, r#"import * as fs from "node:fs";"#),
+        }
+      ],
+      r#"import * as fsPromises from "fs/promises";"#: [
+        {
+          col: 28,
+          fix: (FIX_DESC, r#"import * as fsPromises from "node:fs/promises";"#),
+        }
+      ],
+      r#"import fsPromises from "fs/promises";"#: [
+        {
+          col: 23,
+          fix: (FIX_DESC, r#"import fsPromises from "node:fs/promises";"#),
+        }
+      ],
+
+      r#"await import("fs");"#: [
+        {
+          col: 13,
+          fix: (FIX_DESC, r#"await import("node:fs");"#),
+        }
+      ],
+      r#"await import("fs/promises");"#: [
+        {
+          col: 13,
+          fix: (FIX_DESC, r#"await import("node:fs/promises");"#),
+        }
+      ]
+    };
+  }
+}