[PATCH 2 of 3 evolve-ext-V3] evolve: make prune respect allowunsable

[Pierre-Yves David]

On 06/15/2015 10:30 AM, Laurent Charignon wrote:
> # HG changeset patch
> # User Laurent Charignon <lcharignon at fb.com>
> # Date 1432759785 25200
> #      Wed May 27 13:49:45 2015 -0700
> # Node ID 344c3067174c08634e8564a1067028625c16b536
> # Parent  c73aa260e157a1e5d534d3447d16664992a0e7a5
> evolve: make prune respect allowunsable
>
> Before this patch, the prune command was performing the same way regardless
> of the value of experimental.evolution.
> With this patch if the configuration does not allow unstability, prune won't
> create instability.
>
> diff --git a/hgext/evolve.py b/hgext/evolve.py
> --- a/hgext/evolve.py
> +++ b/hgext/evolve.py
> @@ -1923,6 +1923,14 @@
>           if not precs:
>               raise util.Abort('nothing to prune')
>
> +        if not obsolete.isenabled(repo, obsolete.allowunstableopt):
> +            repoheads = repo.changelog.headrevs()
> +            pruneheads = repo.revs("heads(%ld)", precs)
> +            # If a prune head is not a repo head then we will create
> +            # unstability by operating on the midddle of the stack
> +            if not all([h in repoheads for h in pruneheads]):

Actually, looking at it deeply, this check will fails in some case:

With:

   1 - 2 - 3
         \ 4

using: hg prune '2+3' will pass this test and still create unstability.

We want to check if anything like: '%ld:: - %ld' exists (if I'm correct)

-- 
Pierre-Yves David