Ed Morley

We could enable LTO (link time optimisation) and/or reduce codegen-units to 1 for `cargo libcnb package --release` builds and see how it improves binary size (and to a lesser extent,...

`BuildPlanBuilder` is meant to be used roughly like so: ```rust let build_plan = BuildPlanBuilder::new() .provides("python") .provides("pip") .or() .provides("python") .build(); ``` With the resultant build plan eventually being serialised to the...

eg: ``` [Checking Node.js version] Detected Node.js version range: >=16.9.0

Buildpack API 0.8 deprecates positional arguments for `bin/detect` and `bin/build` in favour of environment variables: https://github.com/buildpacks/rfcs/blob/main/text/0100-buildpack-input-vars.md Whilst the old arguments will not be removed ([reference](https://github.com/buildpacks/rfcs/blob/main/text/0100-buildpack-input-vars.md#how-it-works)), (a) they are still deprecated,...

Add a cargo command for performing both packaging and a `pack build`

1

When developing a buildpack there are a few ways to iterate, that all have their place: 1. Via compiler + Clippy + unit test feedback 2. Via `libcnb-test` powered integration...

Make it harder to forget to use `--release` when packaging for production

3

Currently `cargo libcnb package` defaults to dev/debug builds. To enable release builds, one has to explicitly pass `--release`. I can see users forgetting to do so when compiling/packaging their buildpacks...

Iff an `app_dir_preprocessor` is set in the `TestConfig`, `app::copy_app` is used to copy the fixture directory to a temporary location, so that it can then be modified by the specified...

Improve UX for cached layers that have forgotten to implement `existing_layer_strategy()`

5

Something that came up in our team huddle today was that if a Layer has a `types()` that includes `cache: true`, then if the Layer doesn't implement `existing_layer_strategy()` the layer...

Test on Windows in CI

2

As found in #313, libcnb is not currently compilable on Windows. In order to (a) find out what needs fixing, (b) ensure it doesn't regress when we do fix it,...

Detect mismatched `libcnb-cargo`, `libcnb-test` and `libcnb` versions

2

As part of getting set up with a libcnb.rs powered buildpack, users will run `cargo install libcnb-cargo`, which installs the latest `libcnb-cargo` available at the time. Over time we will...