Merge pull request #1733 from Microsoft/bisect

Automatic bisecting script

scripts/bisect-test.ts

@@ -0,0 +1,56 @@
+/// <reference path="..\src\harness\external\node.d.ts" />
+
+import cp = require('child_process');
+import fs = require('fs');
+
+// Slice off 'node bisect-test.js' from the commandline args
+var args = process.argv.slice(2);
+
+function tsc(tscArgs: string, onExit: (exitCode: number) => void) {
+    var tsc = cp.exec('node built/local/tsc.js ' + tscArgs,() => void 0);
+    tsc.on('close', tscExitCode => {
+        onExit(tscExitCode);
+    });
+}
+
+var jake = cp.exec('jake clean local', () => void 0);
+jake.on('close', jakeExitCode => {
+    if (jakeExitCode === 0) {
+        // See what we're being asked to do
+        if (args[1] === 'compiles' || args[1] === '!compiles') {
+            tsc(args[0], tscExitCode => {
+                if ((tscExitCode === 0) === (args[1] === 'compiles')) {
+                    console.log('Good');
+                    process.exit(0); // Good
+                } else {
+                    console.log('Bad');
+                    process.exit(1); // Bad
+                }
+            });
+        } else if (args[1] === 'emits' || args[1] === '!emits') {
+            tsc(args[0], tscExitCode => {
+                fs.readFile(args[2], 'utf-8', (err, data) => {
+                    var doesContains = data.indexOf(args[3]) >= 0;
+                    if (doesContains === (args[1] === 'emits')) {
+                        console.log('Good');
+                        process.exit(0); // Good
+                    } else {
+                        console.log('Bad');
+                        process.exit(1); // Bad
+                    }
+                });
+            });
+        } else {
+            console.log('Unknown command line arguments.');
+            console.log('Usage (compile errors): git bisect run scripts\bisect.js "foo.ts --module amd" compiles');
+            console.log('Usage (emit check): git bisect run scripts\bisect.js bar.ts emits bar.js "_this = this"');
+            // Aborts the 'git bisect run' process
+            process.exit(-1);
+        }
+    } else {
+        // Compiler build failed; skip this commit
+        console.log('Skip');
+        process.exit(125); // bisect skip
+    }
+});
+ 

scripts/bisect.cmd

@@ -0,0 +1,30 @@
+echo off
+IF NOT EXIST scripts\bisect.cmd GOTO :wrongdir
+IF "%1" == "" GOTO :usage
+IF "%1" == "GO" GOTO :run
+GOTO :copy
+
+:usage
+echo Usage: bisect GoodCommit BadCommit test.ts compiles
+echo Usage: bisect GoodCommit BadCommit test.ts emits test.js "var x = 3"
+GOTO :eof
+
+:copy
+copy scripts\bisect.cmd scripts\bisect-fresh.cmd
+scripts\bisect-fresh GO %*
+GOTO :eof
+
+:run 
+call jake local
+node built/local/tsc.js scripts/bisect-test.ts --module commonjs
+git bisect start %2 %3
+git bisect run node scripts/bisect-test.js %4 %5 %6 %7
+del scripts\bisect-test.js
+del scripts\bisect-fresh.cmd
+GOTO :eof
+
+:wrongdir
+@echo Run this file from the repo folder, not the scripts folder
+GOTO :eof
+
+:eof