Pass absolute path to git.

utils/pub/io.dart

Index: utils/pub/io.dart
diff --git a/utils/pub/io.dart b/utils/pub/io.dart
index cccedfc17b93098bafde5f6847aaa8d9023ba6a5..61d3170db9efea460666ce1c02b5a6ab92251605 100644
--- a/utils/pub/io.dart
+++ b/utils/pub/io.dart
@@ -373,12 +373,25 @@ Future<File> createPackageSymlink(String name, from, to,
   });
 }
 
-/**
- * Given [entry] which may be a [String], [File], or [Directory] relative to
- * the current working directory, returns its full canonicalized path.
- */
-// TODO(rnystrom): Should this be async?
-String getFullPath(entry) => new File(_getPath(entry)).fullPathSync();
+/// Given [entry] which may be a [String], [File], or [Directory] relative to
+/// the current working directory, returns its full canonicalized path.
+String getFullPath(entry) {
+  var path = _getPath(entry);
+
+  // Don't do anything if it's already absolute.
+  if (Platform.operatingSystem == 'windows') {
+    // An absolute path on Windows is either UNC (two leading backslashes),
+    // or a drive letter followed by a colon and a slash.
+    const ABSOLUTE = const RegExp(r'^(\\|[a-zA-Z]:[/\\])');

[nweiz, 2012/11/08 00:23:30]

Doesn't the first branch of this match only only leading backslash?

[Bob Nystrom, 2012/11/08 00:25:18]

It's a raw string, so it should be two, I think.

+    if (ABSOLUTE.hasMatch(path)) return path;
+  } else {
+    if (path.startsWith('/')) return path;
+  }
+
+  // Using Path.join here instead of File().fullPathSync() because the former
+  // does not require an actual file to exist at that path.
+  return new Path.fromNative(workingDir).join(new Path(path)).toNativePath();
+}
 
 // TODO(nweiz): make this configurable
 /**