merge: introduce a revert_to() for that use-case
In the same vein as the previous patch.
Differential Revision: https://phab.mercurial-scm.org/D7901
--- a/hgext/fix.py Wed Jan 15 15:30:25 2020 -0800
+++ b/hgext/fix.py Wed Jan 15 14:47:38 2020 -0800
@@ -735,15 +735,7 @@
wctx = context.overlayworkingctx(repo)
wctx.setbase(repo[newp1node])
- merge.update(
- repo,
- ctx.rev(),
- branchmerge=False,
- force=True,
- ancestor=p1rev,
- mergeancestor=False,
- wc=wctx,
- )
+ merge.revert_to(ctx, wc=wctx)
copies.graftcopies(wctx, ctx, ctx.p1())
for path in filedata.keys():
--- a/mercurial/cmdutil.py Wed Jan 15 15:30:25 2020 -0800
+++ b/mercurial/cmdutil.py Wed Jan 15 14:47:38 2020 -0800
@@ -584,15 +584,8 @@
[os.unlink(repo.wjoin(c)) for c in newlyaddedandmodifiedfiles]
# 3a. apply filtered patch to clean repo (clean)
if backups:
- # Equivalent to hg.revert
m = scmutil.matchfiles(repo, set(backups.keys()) | alsorestore)
- mergemod.update(
- repo,
- repo.dirstate.p1(),
- branchmerge=False,
- force=True,
- matcher=m,
- )
+ mergemod.revert_to(repo[b'.'], matcher=m)
# 3b. (apply)
if dopatch:
--- a/mercurial/merge.py Wed Jan 15 15:30:25 2020 -0800
+++ b/mercurial/merge.py Wed Jan 15 14:47:38 2020 -0800
@@ -2225,6 +2225,7 @@
labels=None,
matcher=None,
mergeforce=False,
+ updatedirstate=True,
updatecheck=None,
wc=None,
):
@@ -2523,7 +2524,7 @@
# If we're doing a partial update, we need to skip updating
# the dirstate.
always = matcher is None or matcher.always()
- updatedirstate = always and not wc.isinmemory()
+ updatedirstate = updatedirstate and always and not wc.isinmemory()
if updatedirstate:
repo.hook(b'preupdate', throw=True, parent1=xp1, parent2=xp2)
# note that we're in the middle of an update
@@ -2606,6 +2607,24 @@
return update(ctx.repo(), ctx.rev(), branchmerge=False, force=True, wc=wc)
+def revert_to(ctx, matcher=None, wc=None):
+ """Revert the working copy to the given commit.
+
+ The working copy will keep its current parent(s) but its content will
+ be the same as in the given commit.
+ """
+
+ return update(
+ ctx.repo(),
+ ctx.rev(),
+ branchmerge=False,
+ force=True,
+ updatedirstate=False,
+ matcher=matcher,
+ wc=wc,
+ )
+
+
def graft(
repo,
ctx,