Stable Branch fix cmupdate self-recovery from upstream rebase in 132.00stable

fix cmupdate self-recovery from upstream rebase in 132.00stable

cmupdate (and updatecm.sh cron, menu 23 submenu 2, AUTO_GITUPDATE=y
startup) breaks with "fatal: Not possible to fast-forward, aborting."
when 141.00beta01 / 140.00beta01 / 132.00stable is rebased on GitHub.
All four callsites did the same fast-forward-only git stash; git pull.

A new inc/git_sync.inc helper detects divergence via
git merge-base --is-ancestor and routes:
- fast-forward: stash with refs/stash sentinel, pull --ff-only, pop
only the stash it created (never user's pre-existing stash)
- local-ahead: warn and skip, never rewinds local commits
- diverged (upstream rebase): tag HEAD as cmupdate-pre-resync-<epoch>,
stash dirty WT, hard-reset to origin/<branch>. Refuses to reset if
stash failed and working tree is dirty.

After this lands, cmupdate self-recovers on every future rebase.

A new tools/cmupdate-fix.sh one-shot script unsticks users already
running a pre-fix cmupdate. Auto-detects local branch, translates
common git errors to plain English, prints step status and a
RESULT: SUCCESS|FAILED summary with rollback commands.

---

curl -fsSLo /tmp/cmupdate-fix.sh \\
https://raw.githubusercontent.com/centminmod/centminmod/132.00stable/tools/cmupdate-fix.sh \\
&& bash /tmp/cmupdate-fix.sh

EL7 git 1.8.3.1 compatible (git stash save -u; git merge-base
--is-ancestor since git 1.8.0).

Changes:
- Add inc/git_sync.inc _cmm_git_sync_impl helper
- Add tools/cmupdate-fix.sh recovery script
- tools/cmupdate.sh: wrapper + panic-stub bootstrap; use helper at 86-89
- updatecm.sh: wrapper + panic-stub; detached-HEAD-safe branch detect;
emit grep-able cmupdate-status: branch=X rc=Y for cron mail
- inc/updater_submenu.inc: source git_sync.inc in re_sourcefiles;
use helper at 227-229
- inc/cpcheck.inc: auto_gitupdate prefers helper; legacy fallback
uses pull --ff-only so rebase failures become silent no-ops

Continue reading...

132.00stable branch

• Branch: https://github.com/centminmod/centminmod/tree/132.00stable
• Commit History: https://github.com/centminmod/centminmod/commits/132.00stable