feat: Add support for projectRoot option (#492)

Co-authored-by: Baptiste Gallet <bgallet@iris-info.com>

Author: 2 people

packages/istanbul-reports/lib/lcov/index.js

@@ -8,10 +8,9 @@ const LcovOnlyReport = require('../lcovonly');
 const HtmlReport = require('../html');
 
 class LcovReport extends ReportBase {
-    constructor() {
+    constructor(opts) {
         super();
-
-        this.lcov = new LcovOnlyReport({ file: 'lcov.info' });
+        this.lcov = new LcovOnlyReport({ file: 'lcov.info', ...opts });
         this.html = new HtmlReport({ subdir: 'lcov-report' });
     }
 }

packages/istanbul-reports/lib/lcovonly/index.js

@@ -9,6 +9,7 @@ class LcovOnlyReport extends ReportBase {
     constructor(opts) {
         super();
         this.file = opts.file || 'lcov.info';
+        this.projectRoot = opts.projectRoot || process.cwd();
         this.contentWriter = null;
     }
 
@@ -25,9 +26,10 @@ class LcovOnlyReport extends ReportBase {
         const branches = fc.b;
         const branchMap = fc.branchMap;
         const summary = node.getCoverageSummary();
+        const path = require('path');
 
-        writer.println('TN:'); //no test name
-        writer.println('SF:' + fc.path);
+        writer.println('TN:'); //no test nam
+        writer.println('SF:' + path.relative(this.projectRoot, fc.path));
 
         Object.values(functionMap).forEach(meta => {
             writer.println('FN:' + [meta.decl.start.line, meta.name].join(','));