seeed-extension: don't fetch external repo during config-dump-json (fixes matrix race)

[igorpecovnik]

Fixes armbian/ci#75.

Problem

The board×branch inventory runs config-dump-json (CONFIG_DEFS_ONLY=yes) in parallel for every target. extensions/seeed-extension.sh fetched the external seeed_armbian_extension repo unconditionally at source time, so the parallel dumps raced on the global git config:

git --no-pager config --global --add safe.directory /armbian/cache/sources/seeed_armbian_extension  -> exit 128

The loser produced empty JSON → Expecting value: line 1 column 1 → KeyError: 'config_ok' → the whole Prepare Info JSON and Matrices step failed (only the Seeed board recomputer-rk3576-devkit was affected, because it's the only one pulling this extension).

Fix

Guard the fetch on CONFIG_DEFS_ONLY — the exact pattern already used by sophgo-sg200x-aic8800.sh (whose comment documents this identical safe.directory exit-128 race) and gateway-dk-ask.sh:

• during config-dump-json, skip the network fetch;
• reuse the cached clone if present, so the dump still enables the extension and sees its config;
• only skip enabling when there's no cache yet;
• on a real build, behaviour is unchanged (fetch + enable).

bash -n clean.

Summary by CodeRabbit

• Bug Fixes
  • Configuration-only operations now avoid unnecessary repository fetching.
  • Cached Seeed extension sources are reused when available, including supported file-based worktrees.
  • If cached sources are unavailable during configuration-only operations, the extension remains disabled.
  • Extension setup now runs only when the extension is enabled.
  • Regular builds continue to fetch the latest repository sources as expected.

[coderabbitai]

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📝 Walkthrough

Walkthrough

The Seeed extension now skips repository fetching during config-dump mode. It reuses a cached clone when available and disables the extension otherwise. Real builds continue to fetch the repository. Setup and enabling occur only when the extension remains enabled.

Changes

Seeed extension config-dump handling

Layer / File(s)	Summary
Conditional fetch and extension setup extensions/seeed-extension.sh	Config-dump mode checks for a cached .git path with -e, which supports directory and file-based worktrees. Without a cached repository, the extension is disabled. Real builds continue to fetch the repository. Directory creation, symlink setup, and enable_extension run only when the extension is enabled.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The change satisfies the coding objectives in issue #75. In CONFIG_DEFS_ONLY=yes, extensions/seeed-extension.sh does not call fetch_from_repo. It reuses the cache when `${SRC}/cache/sources/seee…
Out of Scope Changes check	✅ Passed	The pull request changes only extensions/seeed-extension.sh. The cache detection, conditional fetch, conditional enablement, and diagnostic messages directly address issue #75. The normal-build path…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: preventing the external repository fetch during config-dump-json to fix the matrix race.

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[coderabbitai]

Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
In `@extensions/seeed-extension.sh`:
- Line 50: Update the cache detection condition in the seeed extension
configuration flow to use an existence check for the `.git` path, accepting both
directory-based and file-based worktrees so valid cached repositories are
recognized.

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[rpardini]

The simple truth is that prepare shouldn't depend on fetch.

If we don't fetch during prepare:

• it might be missing and thus fail, or have different hash than the real build
• it might be already there, but stale, and will fail
• it might be already there, but up-to-date, and will work (by accident)

Now, suppose we skip the fetch during prepare

• during prepare, it won't fetch
• during normal build, it will fetch
• if the fetched thing affects hashing (eg the fetched thing is an extension !), then we'll get different hashes across prepare and build, leading to infinite rebuild cycles