* lisp/vc/vc-bzr.el, lisp/vc/vc-cvs.el, lisp/vc/vc-hg.el:
* lisp/vc/vc-rcs.el, lisp/vc/vc-src.el:
Declare functions defined elsewhere, to forestall “might not
be defined at runtime” warnings.
* vc/vc-hooks.el (vc-state, vc-working-revision):
Use `vc-responsible-backend' in order to support unregistered files.
* vc/vc-rcs.el (vc-rcs-fetch-master-state):
* vc/vc-sccs.el (vc-sccs-working-revision): Handle undefined
master name.
* vc/vc-rcs.el (vc-rcs-unregister): Support unregistered files.
* vc/vc-src.el (vc-src-working-revision): Do not return an empty string.
* vc/vc.el, vc/vc-hg.el, vc/vc-git.el, vc/vc-hooks.el,
vc/vc-mtn.el, vc/vc-rcs.el, vc/vc-sccs.el, vc/vc-src.el: rrollback
method removed, to be replaced in the future by uncommit.
* vc.el, all backends: API simplification: Remove 4th 'default-state'
argument from vc-dir-status files and its backend methods - no backend
method ever set it. It was used only in the fallback method to to set
a default of 'up-to-date, though a convoluted call chain obscured
this.
* vc/vc.el and all backends: API simplification; clear-headers is no
longer a public method. It is now local to the one place it's used,
in the RCS steal-lock method.
* vc/vc.el, vc-hooks.el, and all backends: API simplification;
vc-state-heuristic is no longer a public method, having been removed
where it is redundant, unnecessary, or known buggy. This eliminated
all backends except CVS. Eliminates bug#7850.
* vc/vc.el, vc-hooks.el, and all backends: API simplification;
vc-workfile-unchanged-p is no longer a public method (but the RCS and
SCCS back ends retain it as a private method used in state
computation). This method was redundant with vc-state and usually
implemented as a trivial call to same. Fixes the failure mode
described in bug#694.
This hasn't made any sense since RCS, and was a dumb stunt then.
* vc/vc.el and all backends: API simplification; init-revision is
gone, and vc-registered functions no longer take an initial-revision
argument.
