config: treat runtime package compile sections as active

[mobileoverlord]

What

find_active_compile_sections counts a compile section as active if it is reached from an extension or from runtimes.<n>.kernel.compile. A section reached through runtimes.<n>.packages.<pkg>.compile was never counted.

Consequences, in order of how confusing they are:

1. need_target_dev stays false, so no target sysroot is created at all — $AVOCADO_PREFIX/sdk/target-sysroot is simply absent (verified: sdk/ contains only target-repoconf and x86_64).
2. The section's own packages: list is silently discarded.
3. The compile script still runs, with --sysroot pointing at a nonexistent directory. GCC tolerates that and falls back to built-in paths.

So a perfectly valid config has no effect, and the build fails much later on a missing target header or library with nothing pointing back at the cause.

How it was found

references#23 adds a uboot-custom-imx8mp-evk reference wired as:

runtimes:
  dev:
    packages:
      uboot:
        compile: uboot
sdk:
  compile:
    uboot:
      packages:
        libgcc-s-dev: '*'      # silently ignored

It failed first on sys/types.h, then — after that was chased down — on cannot find -lgcc at the U-Boot link, because target libgcc.a only exists in libgcc-s-dev and that request was being dropped. The reference currently works around it by declaring the section under kernel: instead, with a comment pointing here; that workaround can be reverted once this lands.

Tests

Three tests in src/utils/config.rs:

• the runtime-package case (fails on main, passes here)
• scalar package values (avocado-runtime: '*') are not mappings and must not be misread
• the existing kernel.compile and dedup tests still pass

cargo test --bin avocado — 1401 passed. fmt and clippy clean.

Independent of #200 and #201.

[Copilot]

Pull request overview

This PR fixes find_active_compile_sections so that compile sections referenced via runtimes.<name>.packages.<pkg>.compile are treated as active, matching the behavior already implemented for extensions and runtimes.<name>.kernel.compile. This ensures the target sysroot is provisioned and any sdk.compile.<section>.packages dependencies are not silently dropped when a runtime package points at a compile section.

Changes:

• Extend active compile-section discovery to include runtimes.<name>.packages.<pkg>.compile references.
• Add unit tests covering the runtime-package compile reference path and ensuring scalar package values aren’t misread as mappings.
• Retain existing behavior around deduplication and kernel.compile references.

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[jetm]

The fix is correct and the premise checks out: find_active_compile_sections has exactly one production caller (src/commands/sdk/install.rs:347), where it gates need_target_dev and drives the target-dev package list, so the failure the commit body describes is real. The packages.<pkg>.compile shape is genuine and documented (docs/features/sdk-cross-compilation-rpm-packaging.md:108), and find_compile_dependencies_in_ext already handles the identical shape for extensions, so this closes a real asymmetry. No panic risk on the scalar case — as_mapping() and get("compile") both return None for avocado-runtime: '*', which your second test pins. cargo fmt, cargo clippy --all-targets --all-features -- -D warnings and cargo test --lib find_active_compile_sections all pass at 457ce34 (4 tests, including the two new ones).

One thing worth a look before merge.

The new loop iterates every runtime, ignoring runtimes.<n>.target and --runtime. src/utils/config.rs:5770. Its sibling find_active_extensions, called from the same place (install.rs:185), scopes through find_target_relevant_runtimes first. The gap is pre-existing on the kernel.compile line, so this is not a regression you introduced — but it widens it from the rare kernel.compile case to the common packages.<pkg>.compile one, which is the point of the PR. In a multi-target config that means provisioning target-dev for runtimes the user did not ask for.

One nit: no CHANGELOG.md Unreleased/Fixed entry for a user-visible bugfix. Weak signal though — only 5 of the last 15 src-touching commits added one, so the convention does not look enforced here.

Disclosure on my own verification: I tried the delete-the-hunk check to prove the new test actually fails without the production change, and my tooling blocked the edit, so I did not observe the RED. The static argument holds — test_find_active_compile_sections_via_runtime_package has no extensions and no kernel.compile, so the new block is the only path that can produce ["uboot"] — but I am telling you that as reasoning rather than as something I watched fail.

[mobileoverlord]

Both taken, in 63b69ba.

Target scoping. Fixed rather than deferred, on your reasoning: the gap predates the branch on the kernel.compile line, but this PR is what moves it from a rare case to the common one, so it belongs here. find_active_compile_sections now takes the same (config, target, config_path, requested_runtime) tuple as find_active_extensions and scopes through find_target_relevant_runtimes first, so the two scans called from install.rs agree about which runtimes exist.

On the RED you couldn't observe — worth closing that loop, since your static argument was right but you were explicit about not having watched it fail. I reverted the loop body to iterating every runtime and ran it:

test test_find_active_compile_sections_scopes_to_the_target ... FAILED
  left: ["uboot-rpi4", "uboot-x86"]
 right: ["uboot-x86"]

That is the new test, and the failure output is the bug verbatim — both targets' compile sections. The four older tests stayed green under that same mutation, which is what shows the coverage was genuinely absent rather than incidental.

The new test asserts from both directions (qemux86-64 → uboot-x86, raspberrypi4 → uboot-rpi4) so it fails on a scan that returns everything and on one that returns nothing. The four existing tests now build a real Config from a temp file instead of a bare serde_yaml::Value, since scoping needs the merge to resolve runtimes.<n>.target.

CHANGELOG. Added under Fixed, covering the original bug and the scoping as one entry. Your read of the convention matches mine — it is inconsistent in recent history — but the argument for adding it does not depend on that: the failure mode here is a build dying much later on missing target headers, and that is precisely the kind of thing someone greps a changelog for.

cargo fmt, clippy --all-targets --all-features -D warnings and 1393 lib tests green at 63b69ba.

[jetm]

Re-reviewed the increment since 457ce34 - the scan-scoping and changelog commit answering my last pass. Three blocking findings inline; the two in config.rs were reproduced with throwaway probe tests, and both are cases where the narrowing now misses a section it should still find.

Seven advisory notes were withheld rather than appended here, so the blocking ones stay readable.