Preserve zsh tied PATH exports in shell snapshots - #34293
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## Why zsh prints tied scalar/array exports such as `PATH` and `path` with `-T` metadata. The snapshot filter rejected that syntax, so commands available only through the configured `PATH` could not be resolved from a restored snapshot. ## What changed - Recognize writable tied exports and retain them in zsh shell snapshots. - Skip readonly exports so restoring a snapshot does not make variables such as `PATH` immutable. ## Testing Added macOS coverage for restoring a tied `PATH`, handling entries with spaces, deduplicating path entries, excluding readonly tied exports, and resolving a command available only through the restored snapshot. GitOrigin-RevId: 297cfae3368230c7f6fe5ef84f0a10b35a2c802c
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Preserve zsh tied PATH exports in shell snapshots
Why
zsh prints tied scalar/array exports such as
PATHandpathwith-Tmetadata. The snapshot filter rejected that syntax, so commands available only
through the configured
PATHcould not be resolved from a restored snapshot.What changed
PATHimmutable.Testing
Added macOS coverage for restoring a tied
PATH, handling entries with spaces,deduplicating path entries, excluding readonly tied exports, and resolving a
command available only through the restored snapshot.