vitest/patches/istanbul-lib-instrument.patch

diff --git a/CHANGELOG.md b/CHANGELOG.md
deleted file mode 100644
index 3c2c978099ce42ef26b9cd86d5772cff79e329af..0000000000000000000000000000000000000000
diff --git a/package.json b/package.json
index 5e3c704a13d642e07c6d8eb655cb052b69a99e45..743037fa385ac381b193ac7b975e5f548e064727 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
   "dependencies": {
     "@babel/core": "^7.23.9",
     "@babel/parser": "^7.23.9",
+    "@jridgewell/trace-mapping": "^0.3.23",
     "@istanbuljs/schema": "^0.1.3",
     "istanbul-lib-coverage": "^3.2.0",
     "semver": "^7.5.4"
diff --git a/src/ignored-lines.js b/src/ignored-lines.js
new file mode 100644
index 0000000000000000000000000000000000000000..5392b2b17165b3bbd52871bb931be1306f7fabe1
--- /dev/null
+++ b/src/ignored-lines.js
@@ -0,0 +1,61 @@
+const IGNORE_LINES_PATTERN = /\s*istanbul\s+ignore\s+(start|stop)/;
+const EOL_PATTERN = /\r?\n/g;
+
+/**
+ * Parse ignore start/stop hints from **text file** based on regular expressions
+ * - Does not understand what a comment is in Javascript (or JSX, Vue, Svelte)
+ * - Parses source code (JS, TS, Vue, Svelte, anything) based on text search by
+ *   matching for `/* istanbul ignore start *\/` pattern - not by looking for real comments
+ *
+ * ```js
+ * /* istanbul ignore start *\/
+ * <!-- /* istanbul ignore start *\/ -->
+ * <SomeFrameworkComment content="/* istanbul ignore start *\/">
+ * ```
+ */
+function getIgnoredLines(text) {
+    if (!text) {
+        return new Set();
+    }
+
+    const ranges = [];
+    let lineNumber = 0;
+
+    for (const line of text.split(EOL_PATTERN)) {
+        lineNumber++;
+
+        const match = line.match(IGNORE_LINES_PATTERN);
+        if (match) {
+            const type = match[1];
+
+            if (type === 'stop') {
+                const previous = ranges.at(-1);
+
+                // Ignore whole "ignore stop" if no previous start was found
+                if (previous && previous.stop === Infinity) {
+                    previous.stop = lineNumber;
+                }
+
+                continue;
+            }
+
+            ranges.push({ start: lineNumber, stop: Infinity });
+        }
+    }
+
+    const ignoredLines = new Set();
+
+    for (const range of ranges) {
+        for (let line = range.start; line <= range.stop; line++) {
+            ignoredLines.add(line);
+
+            if (line >= lineNumber) {
+                break;
+            }
+        }
+    }
+
+    return ignoredLines;
+}
+
+module.exports = { getIgnoredLines };
diff --git a/src/instrumenter.js b/src/instrumenter.js
index ffc4387b9ba9477bdce3823760400fddb021637d..39f5ee8fede4a6d724b28050e1dd1e1942bd665a 100644
--- a/src/instrumenter.js
+++ b/src/instrumenter.js
@@ -21,6 +21,7 @@ const readInitialCoverage = require('./read-coverage');
  * @param {boolean} [opts.autoWrap=false] set to true to allow `return` statements outside of functions.
  * @param {boolean} [opts.produceSourceMap=false] set to true to produce a source map for the instrumented code.
  * @param {Array} [opts.ignoreClassMethods=[]] set to array of class method names to ignore for coverage.
+ * @param {Array} [opts.ignoreLines=false] enable ignore hints for lines (start, end).
  * @param {Function} [opts.sourceMapUrlCallback=null] a callback function that is called when a source map URL
  *     is found in the original code. This function is called with the source file name and the source map URL.
  * @param {boolean} [opts.debug=false] - turn debugging on.
@@ -83,6 +84,7 @@ class Instrumenter {
                             coverageGlobalScopeFunc:
                                 opts.coverageGlobalScopeFunc,
                             ignoreClassMethods: opts.ignoreClassMethods,
+                            ignoreLines: opts.ignoreLines,
                             inputSourceMap
                         });
 
diff --git a/src/visitor.js b/src/visitor.js
index 04e3115f832799fad6d141e8b0aeaa61ac5c98f9..88f8d2420daabecef2ad2def18c8be245b60e253 100644
--- a/src/visitor.js
+++ b/src/visitor.js
@@ -1,8 +1,17 @@
+const { readFileSync } = require('fs');
 const { createHash } = require('crypto');
 const { template } = require('@babel/core');
+const {
+    originalPositionFor,
+    TraceMap,
+    GREATEST_LOWER_BOUND,
+    LEAST_UPPER_BOUND,
+    sourceContentFor
+} = require('@jridgewell/trace-mapping');
 const { defaults } = require('@istanbuljs/schema');
 const { SourceCoverage } = require('./source-coverage');
 const { SHA, MAGIC_KEY, MAGIC_VALUE } = require('./constants');
+const { getIgnoredLines } = require('./ignored-lines');
 
 // pattern for istanbul to ignore a section
 const COMMENT_RE = /^\s*istanbul\s+ignore\s+(if|else|next)(?=\W|$)/;
@@ -26,7 +35,8 @@ class VisitState {
         sourceFilePath,
         inputSourceMap,
         ignoreClassMethods = [],
-        reportLogic = false
+        reportLogic = false,
+        ignoreLines = false
     ) {
         this.varName = genVar(sourceFilePath);
         this.attrs = {};
@@ -35,8 +45,13 @@ class VisitState {
 
         if (typeof inputSourceMap !== 'undefined') {
             this.cov.inputSourceMap(inputSourceMap);
+
+            if (ignoreLines) {
+                this.traceMap = new TraceMap(inputSourceMap);
+            }
         }
         this.ignoreClassMethods = ignoreClassMethods;
+        this.ignoredLines = new Map();
         this.types = types;
         this.sourceMappingURL = null;
         this.reportLogic = reportLogic;
@@ -45,7 +60,42 @@ class VisitState {
     // should we ignore the node? Yes, if specifically ignoring
     // or if the node is generated.
     shouldIgnore(path) {
-        return this.nextIgnore || !path.node.loc;
+        if (this.nextIgnore || !path.node.loc) {
+            return true;
+        }
+
+        if (!this.traceMap) {
+            return false;
+        }
+
+        // Anything that starts between the line ignore hints is ignored
+        const start = originalPositionTryBoth(
+            this.traceMap,
+            path.node.loc.start
+        );
+
+        // Generated code
+        if (start.line == null) {
+            return false;
+        }
+
+        const filename = start.source;
+        let ignoredLines = this.ignoredLines.get(filename);
+
+        if (!ignoredLines) {
+            const sources = sourceContentFor(this.traceMap, filename);
+            ignoredLines = getIgnoredLines(
+                sources || tryReadFileSync(filename)
+            );
+
+            this.ignoredLines.set(filename, ignoredLines);
+        }
+
+        if (ignoredLines.has(start.line)) {
+            return true;
+        }
+
+        return false;
     }
 
     // extract the ignore comment hint (next|if|else) or null
@@ -742,6 +792,7 @@ function shouldIgnoreFile(programNode) {
  * @param {string} [opts.coverageGlobalScope=this] the global coverage variable scope.
  * @param {boolean} [opts.coverageGlobalScopeFunc=true] use an evaluated function to find coverageGlobalScope.
  * @param {Array} [opts.ignoreClassMethods=[]] names of methods to ignore by default on classes.
+ * @param {Array} [opts.ignoreLines=false] enable ignore hints for lines (start, end).
  * @param {object} [opts.inputSourceMap=undefined] the input source map, that maps the uninstrumented code back to the
  * original code.
  */
@@ -756,7 +807,8 @@ function programVisitor(types, sourceFilePath = 'unknown.js', opts = {}) {
         sourceFilePath,
         opts.inputSourceMap,
         opts.ignoreClassMethods,
-        opts.reportLogic
+        opts.reportLogic,
+        opts.ignoreLines
     );
     return {
         enter(path) {
@@ -840,4 +892,29 @@ function programVisitor(types, sourceFilePath = 'unknown.js', opts = {}) {
     };
 }
 
+function originalPositionTryBoth(sourceMap, { line, column }) {
+    const mapping = originalPositionFor(sourceMap, {
+        line,
+        column,
+        bias: GREATEST_LOWER_BOUND
+    });
+    if (mapping.source === null) {
+        return originalPositionFor(sourceMap, {
+            line,
+            column,
+            bias: LEAST_UPPER_BOUND
+        });
+    } else {
+        return mapping;
+    }
+}
+
+function tryReadFileSync(filename) {
+    try {
+        return readFileSync(filename, 'utf8');
+    } catch (_) {
+        return undefined;
+    }
+}
+
 module.exports = programVisitor;