narrow: factor out logic to create cg while widening into separate fn
This patch takes out the logic which generates a changegroup for widening a
narrow clone when ellipses are disabled. This is done because future patches
will introduce a narrow_widen() wireprotocol command which will send a
bundle2 with changegroup and will use this function.
The new function for now returns just the changegroup for compatibility with
existing code, but in future patches, when we establish a wireprotocol command
and call this function from there, this will return the required bundle2.
Differential Revision: https://phab.mercurial-scm.org/D4786
$ cat >> $HGRCPATH << EOF
> [extensions]
> absorb=
> EOF
$ hg init repo1
$ cd repo1
Make some commits:
$ for i in 1 2 3; do
> echo $i >> a
> hg commit -A a -m "commit $i" -q
> done
absorb --edit-lines will run the editor if filename is provided:
$ hg absorb --edit-lines
nothing applied
[1]
$ HGEDITOR=cat hg absorb --edit-lines a
HG: editing a
HG: "y" means the line to the right exists in the changeset to the top
HG:
HG: /---- 4ec16f85269a commit 1
HG: |/--- 5c5f95224a50 commit 2
HG: ||/-- 43f0a75bede7 commit 3
HG: |||
yyy : 1
yy : 2
y : 3
nothing applied
[1]
Edit the file using --edit-lines:
$ cat > editortext << EOF
> y : a
> yy : b
> y : c
> yy : d
> y y : e
> y : f
> yyy : g
> EOF
$ HGEDITOR='cat editortext >' hg absorb -q --edit-lines a
$ hg cat -r 0 a
d
e
f
g
$ hg cat -r 1 a
b
c
d
g
$ hg cat -r 2 a
a
b
e
g