diff mercurial/context.py @ 44365:7c4b98a4e536

copy: add experimetal support for unmarking committed copies

The simplest way I'm aware of to unmark a file as copied after
committing is this:

  hg uncommit --keep <dest>
  hg forget <dest>
  hg add <dest>
  hg amend

This patch teaches `hg copy --forget` a `-r` argument to simplify that into:

  hg copy --forget --at-rev . <dest>

In addition to being simpler, it doesn't touch the working copy, so it
can easily be used even if the destination file has been modified in
the working copy.

I'll teach `hg copy` without `--forget` to work with `--at-rev` next.

Differential Revision: https://phab.mercurial-scm.org/D8030

--- a/mercurial/context.py	Fri Dec 20 15:50:13 2019 -0800
+++ b/mercurial/context.py	Tue Jan 28 14:07:57 2020 -0800
@@ -2487,6 +2487,17 @@
             editor=editor,
         )
 
+    def tomemctx_for_amend(self, precursor):
+        extra = precursor.extra().copy()
+        extra[b'amend_source'] = precursor.hex()
+        return self.tomemctx(
+            text=precursor.description(),
+            branch=precursor.branch(),
+            extra=extra,
+            date=precursor.date(),
+            user=precursor.user(),
+        )
+
     def isdirty(self, path):
         return path in self._cache