Eric Seidel
48 lines
1.4 KiB
Markdown
48 lines
1.4 KiB
Markdown
<!-- cspell:words Angelov mrgnhnt -->
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# Scoped Deps
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A simple dependency injection library built on Zones.
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## Status: vendored, no longer published by Shorebird
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Felix Angelov wrote this package in 2023 (originally `package:scoped`) so that
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our packages could share one dependency-injection mechanism. We published it to
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pub.dev in 2024 in case it was useful to others, then never needed to change it
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again.
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In 2026, Morgan Hunt ([`mrgnhnt96/scoped_deps`][mrgnhnt_repo]) approached us
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about taking over the pub.dev package and continuing to improve it, and we
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accepted. **[`scoped_deps` on pub.dev][pub_package] is now his**, and its
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versions have diverged from this directory.
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Shorebird packages keep using this vendored copy, resolved through the Dart
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workspace rather than from pub.dev. The code hasn't meaningfully changed in two
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years, so there's nothing to gain from moving right now. At some point we should
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look at where the pub.dev package has evolved to and consider deleting this copy
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in favor of it.
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[mrgnhnt_repo]: https://github.com/mrgnhnt96/scoped_deps
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[pub_package]: https://pub.dev/packages/scoped_deps
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## Quick Start
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```dart
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import 'package:scoped_deps/scoped_deps.dart';
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final value = create(() => 42);
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void main() {
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runScoped(scopeA, values: {value});
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}
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void scopeA() {
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print(read(value)); // 42
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runScoped(scopeB, values: {value.overrideWith(() => 0)});
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}
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void scopeB() {
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print(read(value)); // 0
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}
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```
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