"$DART" pub global activate --source path <path/to/local/snippets/tool>

dartdoc:stderr:   error: tool execution failed: Tool "dartpad" returned non-zero exit code (1) when run as "/Users/goderbauer/dev/flutter/bin/cache/dart-sdk/bin/dart pub global run snippets --output-directory=doc/snippets --type=dartpad" from /private/tmp/dartdoc.n04eN
dartdoc:stderr: Input to dartpad was:
dartdoc:stderr: This sample shows how to override the default label [Text]
dartdoc:stderr: widget with one that forces the menu entry to appear on one line
dartdoc:stderr: by specifying [Text.maxLines] and [Text.overflow].
dartdoc:stderr:
dartdoc:stderr: ** See code in examples/api/lib/material/dropdown_menu/dropdown_menu_entry_label_widget.0.dart **
dartdoc:stderr: Stderr output was:
dartdoc:stderr: Could not make "/Users/goderbauer/.pub-cache/bin/snippets" executable (exit code 1):
dartdoc:stderr: chmod: /Users/goderbauer/.pub-cache/bin/snippets: No such file or directory
dartdoc:stderr:
dartdoc:stderr:
dartdoc:stderr:     from material.DropdownMenuEntry.labelWidget: (file:///Users/goderbauer/dev/flutter/packages/flutter/lib/src/material/dropdown_menu.dart:80:17)
dartdoc:stderr:   error: tool execution failed: Tool "snippet" returned non-zero exit code (1) when run as "/Users/goderbauer/dev/flutter/bin/cache/dart-sdk/bin/dart pub global run snippets --output-directory=doc/snippets --type=snippet" from /private/tmp/dartdoc.n04eN
dartdoc:stderr: Input to snippet was:
dartdoc:stderr:
dartdoc:stderr: This example, which would be inserted into a [CustomScrollView.slivers]
dartdoc:stderr: list, shows twenty boxes in a pretty teal grid:
dartdoc:stderr:
dartdoc:stderr: ```dart
dartdoc:stderr: SliverGrid(
dartdoc:stderr:   gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
dartdoc:stderr:     maxCrossAxisExtent: 200.0,
dartdoc:stderr:     mainAxisSpacing: 10.0,
dartdoc:stderr:     crossAxisSpacing: 10.0,
dartdoc:stderr:     childAspectRatio: 4.0,
dartdoc:stderr:   ),
dartdoc:stderr:   delegate: SliverChildBuilderDelegate(
dartdoc:stderr:     (BuildContext context, int index) {
dartdoc:stderr:       return Container(
dartdoc:stderr:         alignment: Alignment.center,
dartdoc:stderr:         color: Colors.teal[100 * (index % 9)],
dartdoc:stderr:         child: Text('grid item $index'),
dartdoc:stderr:       );
dartdoc:stderr:     },
dartdoc:stderr:     childCount: 20,
dartdoc:stderr:   ),
dartdoc:stderr: )
dartdoc:stderr: ```
dartdoc:stderr: Stderr output was:
dartdoc:stderr: Could not make "/Users/goderbauer/.pub-cache/bin/snippets" executable (exit code 1):
dartdoc:stderr: chmod: /Users/goderbauer/.pub-cache/bin/snippets: No such file or directory