[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[#61071] New features: VC timemachine and BackupOnSave to RCS
From: |
John Yates |
Subject: |
[#61071] New features: VC timemachine and BackupOnSave to RCS |
Date: |
Thu, 26 Jan 2023 07:06:41 -0500 |
New bug tracker issue #61071. Here is [PATCH 0/3] cover letter:
This is a series of three bisectable (I hope :-) patches that culminate
in support of a new Emacs backup scheme:
* [PATCH 1/3] Refactor and document vc-find-revision caching
* [PATCH 2/3] Introduce VC timemachine capability
* [PATCH 3/3] Introduce vc-bos: backup on save (to an RCS file)
This Backup-On-Save scheme exploits a file system mirror scheme
introduced in the first patch. By exploiting a little known aspect
of RCS's algorithm for locating a master file, backups are stored
completely removed from the work file (i.e. no local RCS directories)
and under exactly the same filename (i.e. no ',v' suffix or similar).
Accessing backed-ups exploits a new vc-timemachine capability,
introduced in the second patch. Both the design and code owe much
to Peter Stiernström's original git-timemachine.el. To sidestep any
copyright issues, Peter has graciously assigned git-timemachine.el's
copyright to the FSF. With the submission timemachine functionality
is available in both vc-git and vc-rcs.
This backup scheme works equally well with files already under some
VCS as well as with files that are not currently version controlled.
For me (primarily a C++ programmer) this is:
* My first significant bit of elisp
* My first exposure to the VC codebase
* My first Emacs / FSF submission
I welcome all nature of feedback:
* Code criticism
* Violations of pertinent standards
* Bug reports
* Suggested improvement
* . . .
- [#61071] New features: VC timemachine and BackupOnSave to RCS,
John Yates <=