## Summary
`linkBin()` unconditionally calls `cmdShim()` / `symlinkDir()` even when the target bin already points at the correct path. This causes redundant I/O on repeated installs and `EACCES` failures when the bin directory lives on a read-only filesystem (Docker layer caching, CI prewarm, NFS mounts).
This PR adds a check at the top of `linkBin()` that verifies the existing bin before skipping:
- **Symlinks**: `readlink` target is compared against `cmd.path`
- **Cmd-shim files**: checked via `isShimPointingAt()` from `@zkochan/cmd-shim` v9, which embeds a `# cmd-shim-target=<path>` marker in every generated sh shim
- Files larger than 4KB (binaries) are never skipped — they are not cmd-shims
Stale or incorrect bins (wrong target, missing marker, different provider) are always rewritten.
Follows up on feedback from #11020.
## Changes
- `bins/linker/src/index.ts` — add target verification check in `linkBin()`
- `bins/linker/test/index.ts` — tests for skip and rewrite behavior
- `pnpm-workspace.yaml` — upgrade `@zkochan/cmd-shim` to v9
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Co-authored-by: Zoltan Kochan <z@kochan.io>
BIN_OWNER_OVERRIDES was only used in checkGlobalBinConflicts for global
installs. This change applies the same ownership rules in
compareCommandsInConflict so that conflict resolution is consistent
between global conflict checking and actual bin linking.
This ensures packages like npm get priority for bins like npx even in
non-global installs.
Closes#10850
* test(link-bins): add missing fixture for bin-owner-override test
* refactor: extract BIN_OWNER_OVERRIDES to @pnpm/package-bins
Move shared logic to avoid code duplication between link-bins
and checkGlobalBinConflicts.
* fix(link-bins): use regex for Windows path compatibility in test
* refactor(link-bins): remove redundant ownName field
pkgOwnsBin already handles the binName === pkgName case, making
the ownName field and its associated checks redundant.
* Change versioning to patch for bins resolver and linker
Added BIN_OWNER_OVERRIDES and pkgOwnsBin to @pnpm/bins.resolver for improved conflict resolution in bin linking.
* test: remove node_modules from bin-owner-override fixture
Move fixture packages to the directory root instead of nesting them
inside node_modules, avoiding committing node_modules to the repo.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Zoltan Kochan <z@kochan.io>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
