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Revamped the synchronization logic. Synchronization now happens in a specific direction. For example, if we are doing a diff, we just need to push changes from the tree to the MCVS directory, not the other way around. Or: before an update or commit, we push from the tree to MCVS, then after the update, in the other direction. * code/update.lisp (mcvs-update): The before update is done in the :left direction only, and the after update in the :right. * code/move.lisp (mcvs-move): The just-in-case sync is done in the :left direction only. * code/link.lisp (mcvs-link): Likewise. * code/remove.lisp (mcvs-remove): Likewise. * code/add.lisp (mcvs-add): Get rid of mapping-synchronize call; it's completely unnecessary, since the new files are not even in the MAP-LOCAL, and the add logic explicitly links them into the MCVS directory. * code/generic.lisp (mcvs-generic): New keyword parameter, need-sync-before. Before-synchronization done in :left direction, after-synchronization in :right direction. Before-synchronization is now not done by default; need-sync-before must be specified. (mcvs-commit-wrapper): Specify before and after sync. (mcvs-diff-wrapper, mcvs-status-wrapper, mcvs-edit-wrapper): Explicitly specify before sync. (mcvs-tag-wrapper, mcvs-annotate-wrapper): Implicitly specify no sync. (mcvs-unedit-wrapper): Add before sync. * code/sync.lisp (synchronize-files): New key parameter :direction, values can be :left, :right or :either. Default is :either. If the value is :left or :right, then a sync is done only in that direction, otherwise the value :no-sync is returned. Behavior change: if the left file is missing (F- file in MCVS directory) it is not re-created, but rather :no-sync is returned. Also, if both files exist, have the same timestamp, and are distinct objects, if the direction is :left or :right, then the appropriate restart is automatically chosen. So this will do the right thing on filesystems where link() is performed by copying, without bothering the user with the error. * code/mapping.lisp (mapping-synchronize): New :direction key parameter, passed down to synchronize-filed. The new :no-sync return value from synchronize-files is handled. (mapping-update): Select the :right direction for synchronizing moves, adds or rollbacks.
Add test for empty paths.
* code/link.lisp (mcvs-link): Revamped link command to behave properly when the destination object is a directory. It must create the link in that directory, rather than try to create a link with that name. Plus handles various tricky cases. Trailing slash in destination name, destination that is a directory within target directory, attempted link creation in MCVS etc.
New link command for creating symlinks. * mcvs-main.lisp (*link-options*): New option constant. (*mcvs-command-table*): Entries for new command added. (*usage*): Help text added. * link.lisp: New file. (mcvs-link, mcvs-link-wrapper): New functions.
file F-5E30677BF94A6FA7AD45BAA270984CFA.lisp was initially added on branch mcvs-1-0-branch.
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