First pass at getting git and tar.gz working on Windows.

utils/tests/pub/test_pub.dart

Index: utils/tests/pub/test_pub.dart
diff --git a/utils/tests/pub/test_pub.dart b/utils/tests/pub/test_pub.dart
index 9fe67f0e00c7c46015046011d3081f8f37d96f8f..bb264b1d1c8af0b168259d01e471f4e5b99b2e33 100644
--- a/utils/tests/pub/test_pub.dart
+++ b/utils/tests/pub/test_pub.dart
@@ -975,10 +975,27 @@ class TarFileDescriptor extends Descriptor {
       tempDir = _tempDir;
       return Futures.wait(contents.map((child) => child.create(tempDir)));
     }).chain((_) {
-      var args = ["--directory", tempDir.path, "--create", "--gzip", "--file",
-          join(parentDir, _stringName)];
-      args.addAll(contents.map((child) => child.name));
-      return runProcess("tar", args);
+      if (Platform.operatingSystem != "windows") {
+        var args = ["--directory", tempDir.path, "--create", "--gzip",
+            "--file", join(parentDir, _stringName)];
+        args.addAll(contents.map((child) => child.name));
+        return runProcess("tar", args);
+      } else {
+        // TODO(bob): HACK TEMP!!!!!
+        var command = "C:\\Program Files (x86)\\7-Zip\\7z.exe";

[nweiz, 2012/09/18 23:07:12]

Make this a real path

[Bob Nystrom, 2012/09/19 15:57:54]

Oopsie! Done.

+
+        // Create the tar file.
+        var tarFile = join(tempDir, _stringName.replaceAll("tar.gz", "tar"));
+        var args = ["a", tarFile];
+        args.addAll(contents.map(
+            (child) => '-i!"${join(tempDir, child.name)}"'));
+
+        return runProcess(command, args).chain((_) {
+          // GZIP it. 7zip doesn't support doing both as a single operation.
+          args = ["a", join(parentDir, _stringName), tarFile];
+          return runProcess(command, args);
+        });
+      }
     }).chain((result) {
       if (!result.success) {
         throw "Failed to create tar file $name.\n"