This PR has been reworked. Instead of silently switching the default
base image based on Swift version, we now:
1. **Keep Amazon Linux 2 as the default** base Docker image for the
packager plugin
2. **Add a prominent deprecation warning** when AL2 is used (either via
Docker or natively), informing developers that AL2 reaches End of Life
on June 30, 2026
3. **Migrate all examples** (READMEs, SAM templates, scripts) to build
and deploy on Amazon Linux 2023 (`provided.al2023` runtime +
`--base-docker-image swift:amazonlinux2023`)
4. **Update documentation** (readme, quick-setup) with migration notes
The warning includes the `--base-docker-image swift:6.3-amazonlinux2023`
flag and reminds developers to use the `provided.al2023` runtime when
deploying.
After June 30, 2026, the default will switch to AL2023.
---
<details>
<summary>Original PR description (superseded)</summary>
~~Now that Docker Hub has official Swift images based on Amazon Linux
2023 (starting with 6.3), the packager plugin picks the right base image
automatically depending on the Swift version:~~
~~- Swift 6.3 and later: `swift:<version>-amazonlinux2023`~~
~~- Earlier versions: `swift:<version>-amazonlinux2` (unchanged
behavior)~~
~~- No version specified (latest): defaults to `amazonlinux2023`~~
~~When only a major version is provided (e.g. `--swift-version 6`
without a minor), we conservatively treat it as 6.0 and use Amazon Linux
2, since we can't be sure it's 6.3+.~~
~~Also added a verbose log line showing the resolved Swift version,
Amazon Linux version, and final base image to help with debugging.~~
~~The `--base-docker-image` flag still overrides everything as before.~~
</details>
---------
Co-authored-by: Sébastien Stormacq <stormacq@amazon.lu>
Apply recommendations in code and documentation
- [CI] restrict permissions to read-all instead of the default write-all
- All examples README.md : add a note about Lambda functions
configuration with improved security and scalability changes for
production environment
- Swift docc documentation: add a note about Lambda functions
configuration with improved security and scalability changes for
production environment
---------
Co-authored-by: Sebastien Stormacq <stormacq@amazon.lu>
Sébastien Stormacq