Two simple helper snippets for build.dart (entryPoints) + pubspec.yaml (transformers)

snipptet-for-dart

pubspec.yaml
---snip---
echo "transformers:" && echo "- polymer:" && echo "    entry_points:" && find web -name "index.html" | sed "s/\(.*\)/    - \1/g"
---snap---
Produces:

transformers:
- polymer:
    entry_points:
    - web/auto_complete/index.html
    - web/automatic_node_finding/index.html
    - web/bind_component_field_to_model_field/index.html
    - web/bind_number_to_text_field_with_filter/index.html
    - web/bind_to_a_map/index.html


build.dart (remove the last comma from output)
---snip---
echo "build(entryPoints: [" && find web -name "index.html" | sed "s/\(.*\)/    '\1',/g" && echo "], options: parseOptions(['--deploy']));" 
---snap---
Produces:

build(entryPoints: [
    'web/auto_complete/index.html',
    'web/automatic_node_finding/index.html',
    'web/bind_component_field_to_model_field/index.html',
    'web/bind_number_to_text_field_with_filter/index.html'
], options: parseOptions(['--deploy']));