abort: added logic for of hg abort
This is part of `GSoC19` project `Implement abort and
continue commands`. This patch is part of the `abort plan`.
This adds the basic logic for `hg abort`. This command
aborts an multistep operation like graft, histedit, rebase,
merge and unshelve if they are in an unfinished state.
The first part of the logic is determining the unfinished
operation from the state detection API under `statemod`.
This API is extended to support `hg abort` by adding a method
to register the abort logic as a function (here `abortfunc`).
Once the unfinished operation is determined the registered
logic is used to abort the command. The benefit of this kind
of framework is that any new extension developed can support
`hg abort` by registering the command and logic under
statedetection API.
`hg abort` currently supports `--dry-run/-n` flag only.
It is used to dry run `hg abort`
Further patches sequentially add support for `graft`, `rebase`,
`unshelve`, `histedit` and `merge`.
Differential Revision: https://phab.mercurial-scm.org/D6566
merge: disallow merge abort in case of an unfinished operation (
issue6160)
This patch disallows `hg merge --abort` in case an operation of higher
precedence i.e unshelve, rebase, histedit are in unfinished states.
This is done so as to avoid partial abort of these operations in case
merge abort is called at an interrupted step.
The patch adds a `cmdutil.getunfinishedstate` function which checks
for operations under progress and returns a `statecheck` object for it.
Differential Revision: https://phab.mercurial-scm.org/D6607
relnotes: document new range-select mechanism in crecord
Differential Revision: https://phab.mercurial-scm.org/D6622
statecheck: updated docstrings related to afterresolvedstates
Differential Revision: https://phab.mercurial-scm.org/D6606
extdata: avoid crashing inside subprocess when we get a revset parse error
Differential Revision: https://phab.mercurial-scm.org/D6616
extdata: demonstrate bad behavior when a subprocess emits garbage
Differential Revision: https://phab.mercurial-scm.org/D6615