file: job.t package: muf status: alpha
This function replaces the contents of the given db with
those taken from the corresponding host .db file.
The result is similar to that obtainable by doing a
rootRemoveDb followed immediately by a matching
rootImportDb, except that doing a
rootReplaceDb instead will usually leave intact
pointers from outside the db into it, whereas the former
sequence is guaranteed to set all such pointers to
nil.
root: [ .db["mydb"] | rootReplaceDb ]pop root:
The rootReplaceDb may be used to either upgrade
or roll back ("downgrade"?) a db: It doesn't care which.
The replacement .db file must currently have (in the
case of the above example) one of the names
muq-CURRENT-xyz.db muq-CURRENT-xyz.db.gz muq-CURRENT-xyz.db.lzo muq-CURRENT-xyz.db.bz2
A future version of this function will probably allow
specification of an arbitrary host filename (if not
pathname) for the .db file.
See section rootRemoveDb. See section rootImportDb.
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