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cctest-recipe-upstream: guard against diverged mirror history (rebase before compare)

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autonomic-bot
2026-09-14 19:16:25 +00:00
parent c6dad5f11b
commit 1b8c3966cb
2 changed files with 20 additions and 0 deletions
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.opencode/skills/cctest-recipe-upstream/SKILL.md
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@@ -71,3 +71,13 @@ If the operator's checkout does NOT yet have the mirror remote, emit once before
In both modes the final output is a set of commands for the operator to run on a machine **with In both modes the final output is a set of commands for the operator to run on a machine **with
push access to `git.coopcloud.tech`** — always print them, even when everything local is push access to `git.coopcloud.tech`** — always print them, even when everything local is
already prepared. already prepared.
**History-divegence check before emitting the compare URL.** The autonomic recipe-maintainer
mirrors' `main` can share only a distant ancestor with upstream `main` (same work re-committed
with different hashes as the mirror was synced/rebuilt). A 3-dot compare
`main...<head_ref>` from the raw mirror branch then shows the ENTIRE diverged history, not the
one upgrade commit. Guard: while preparing, run
`git merge-base <head_ref> <base_ref>`; if the result is older than a few commits below upstream
`origin/main`, cherry-pick the upgrade commit(s) onto fresh upstream `origin/main` (branch
`<head_ref>-rebased`), push THAT to the autonomic mirror, and emit the fetch/push/compare commands
using the rebased branch instead of the raw one.
scripts/gen-cctest-skills.py
+10
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@@ -99,6 +99,16 @@ If the operator's checkout does NOT yet have the mirror remote, emit once before
In both modes the final output is a set of commands for the operator to run on a machine **with In both modes the final output is a set of commands for the operator to run on a machine **with
push access to `git.coopcloud.tech`** — always print them, even when everything local is push access to `git.coopcloud.tech`** — always print them, even when everything local is
already prepared. already prepared.
**History-divegence check before emitting the compare URL.** The autonomic recipe-maintainer
mirrors' `main` can share only a distant ancestor with upstream `main` (same work re-committed
with different hashes as the mirror was synced/rebuilt). A 3-dot compare
`main...<head_ref>` from the raw mirror branch then shows the ENTIRE diverged history, not the
one upgrade commit. Guard: while preparing, run
`git merge-base <head_ref> <base_ref>`; if the result is older than a few commits below upstream
`origin/main`, cherry-pick the upgrade commit(s) onto fresh upstream `origin/main` (branch
`<head_ref>-rebased`), push THAT to the autonomic mirror, and emit the fetch/push/compare commands
using the rebased branch instead of the raw one.
""", """,
} }