PR #78393: fix(update): preserve pnpm custom global root

• Repository: openclaw/openclaw
• Author: amknight
• State: closed | merged: True
• Link: https://github.com/openclaw/openclaw/pull/78393

Description (problem / solution / changelog)

Summary

• Detect pnpm-managed OpenClaw installs from the running package root even when pnpm root -g points at a different default global root.
• Preserve the owning pnpm --global-dir during package updates so openclaw update updates the active custom install instead of creating a second install under the default pnpm root.
• Keep the pnpm inference narrow by requiring pnpm's node_modules/.modules.yaml metadata in addition to the global layout/lockfile markers, and cover pnpm's actual global virtual-store layout (<global-dir>/5/.pnpm/.../node_modules/openclaw).
• Add a changelog entry for #78377.

Fixes #78377.

Verification

• pnpm test src/infra/update-global.test.ts src/infra/package-update-steps.test.ts src/cli/update-cli.test.ts
• pnpm exec oxfmt --check --threads=1 src/infra/update-global.ts src/infra/update-global.test.ts src/infra/package-update-steps.ts src/infra/package-update-steps.test.ts src/cli/update-cli/update-command.ts CHANGELOG.md
• git diff --check
• Rebased cleanly on latest origin/main; post-rebase git diff --check and diff/stat sanity passed.
• Installed a packed OpenClaw tarball through the real pnpm CLI with PNPM_HOME=<tmp>/pnpm-home pnpm --allow-build=@openclaw/fs-safe add -g --global-dir <tmp>/custom-global <pack.tgz>, then ran the installed <tmp>/pnpm-home/openclaw update --yes --no-restart --json --tag latest. The update returned status: ok, mode: pnpm, and the global update step was pnpm add -g --global-dir <tmp>/custom-global <pack.tgz> while the default pnpm root remained <tmp>/pnpm-home/global/5/node_modules.
• Hetzner Crabbox installed-CLI validation initially reproduced the incomplete behavior (mode: npm from the pnpm virtual-store package root). After the virtual-store fix, Hetzner reruns were blocked before execution by Crabbox remote sync sanity (17779 tracked deletions), so the final installed-CLI proof above was run locally against the same openclaw CLI/update path.

Changed files

• CHANGELOG.md (modified, +1/-0)
• src/cli/update-cli/update-command.ts (modified, +6/-1)
• src/infra/package-update-steps.test.ts (modified, +3/-2)
• src/infra/package-update-steps.ts (modified, +7/-6)
• src/infra/update-global.test.ts (modified, +154/-0)
• src/infra/update-global.ts (modified, +81/-3)