bundle2: extract processing of part into its own function
This is code movement only. This will be useful to have it separated for reuse
purposes. We plan to introduce a new feature to the bundle format that allow
inserting a part in the middle of another part payload. This will be useful to
transmit a exception raised during a part generation.
#require symlink
http://mercurial.selenic.com/bts/issue1438
$ hg init
$ ln -s foo link
$ hg add link
$ hg ci -mbad link
$ hg rm link
$ hg ci -mok
$ hg diff -g -r 0:1 > bad.patch
$ hg up 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg import --no-commit bad.patch
applying bad.patch
$ hg status
R link
? bad.patch