correctly report

cli/tools/lint/lint.js

@@ -11,14 +11,28 @@ export class Context {
   }
 
   report(data) {
+    // TODO(bartlomieju): if there's `node` then convert position automatically
+    // otherwise lookup `location`
+    let start, end;
+
+    if (data.node) {
+      start = data.node.span.start - 1;
+      end = data.node.span.end - 1;
+    } else if (data.span) {
+      start = data.span.start - 1;
+      end = data.span.end - 1;
+    } else {
+      throw new Error(
+        "Either `node` or `span` must be provided when reporting an error",
+      );
+    }
+
     op_lint_report(
       this.id,
       this.fileName,
       data.message,
-      data.startLine,
-      data.startColumn,
-      data.endLine,
-      data.endColumn,
+      start,
+      end,
     );
   }
 }
@@ -61,12 +75,12 @@ function traverse(ast, visitor, parent = null) {
   ast.parent = parent;
   // Call visitor if it exists for this node type
   if (visitor[nodeType] && typeof visitor[nodeType] === "function") {
-    visitor[nodeType](ast, parent);
+    visitor[nodeType](ast);
   }
 
   // Traverse child nodes
   for (const key in ast) {
-    if (key === "parent" || key === "type" || key === "span") {
+    if (key === "parent" || key === "type") {
       continue;
     }
 

cli/tools/lint/plugins.rs

@@ -7,6 +7,7 @@ use deno_ast::ModuleSpecifier;
 use deno_ast::ParsedSource;
 use deno_ast::SourceRange;
 use deno_ast::SourceTextInfo;
+use deno_ast::SourceTextProvider;
 use deno_core::anyhow::Context;
 use deno_core::error::custom_error;
 use deno_core::error::AnyError;
@@ -451,21 +452,12 @@ impl LintPluginContainer {
     id: String,
     specifier: String,
     message: String,
-    start_line: usize,
-    start_column: usize,
-    end_line: usize,
-    end_column: usize,
+    start: usize,
+    end: usize,
   ) {
     let source_text_info = self.source_text_info.as_ref().unwrap();
-    let start_range = source_text_info.loc_to_source_pos(LineAndColumnIndex {
-      line_index: start_line,
-      column_index: start_column,
-    });
-    let end_range = source_text_info.loc_to_source_pos(LineAndColumnIndex {
-      line_index: end_line,
-      column_index: end_column,
-    });
-    let source_range = SourceRange::new(start_range, end_range);
+    let start_pos = source_text_info.start_pos();
+    let source_range = SourceRange::new(start_pos + start, start_pos + end);
     let range = LintDiagnosticRange {
       range: source_range,
       description: None,
@@ -526,19 +518,9 @@ fn op_lint_report(
   #[string] id: String,
   #[string] specifier: String,
   #[string] message: String,
-  #[smi] start_line: usize,
-  #[smi] start_column: usize,
-  #[smi] end_line: usize,
-  #[smi] end_column: usize,
+  #[smi] start: usize,
+  #[smi] end: usize,
 ) {
   let container = state.borrow_mut::<LintPluginContainer>();
-  container.report(
-    id,
-    specifier,
-    message,
-    start_line,
-    start_column,
-    end_line,
-    end_column,
-  );
+  container.report(id, specifier, message, start, end);
 }

plugin.js

@@ -6,10 +6,10 @@ const rule = {
   create(context) {
     console.log("Hello from", `${PLUGIN_NAME}/${RULE1_NAME}`);
     context.report({
-      startLine: 0,
-      startColumn: 6,
-      endLine: 0,
-      endColumn: 9,
+      span: {
+        start: 6,
+        end: 9,
+      },
       message: "Error from " + `${PLUGIN_NAME}/${RULE1_NAME}`,
       data: {
         some: "Data",
@@ -23,12 +23,15 @@ const rule = {
       VariableDeclarator(node) {
         // console.log("variable declarator", node);
         // Check if a `const` variable declaration
+        console.log("node.parent.kind", node.parent.kind);
         if (node.parent.kind === "const") {
           // Check if variable name is `foo`
-          if (node.id.type === "Identifier" && node.id.name === "foo") {
+          console.log("node.id.type", node.id.type, node.id.value);
+          if (node.id.type === "Identifier" && node.id.value === "foo") {
             // Check if value of variable is "bar"
+            console.log("node.init", node.init);
             if (
-              node.init && node.init.type === "Literal" &&
+              node.init && node.init.type === "StringLiteral" &&
               node.init.value !== "bar"
             ) {
               /*