revert: properly back up added files with local modification
These files were previously not backed up because the backup mechanism was not
smart enough. This leads to data lose for the user since uncommitted contents
were discarded.
We now properly move the modified version to <filename>.orig before deleting it.
We have to use a small hack to do a different action if "--no-backup" is
specified. This is needed because the backup process is actually a move (not a
copy) so the file is already missing when we backup. The internet kitten is a
bit disapointed about that, but such is life.
This patch concludes the "lets refactor revert" phases. We can now open the
"Lets find stupid bug with renames and merge" phases.
I'm sure that now that the code is clearer we could do it in another simpler
way, but I consider the current improvement good enough for now.
Test unionrepo functionality
Create one repository
$ hg init repo1
$ cd repo1
$ touch repo1-0
$ echo repo1-0 > f
$ hg ci -Aqmrepo1-0
$ touch repo1-1
$ echo repo1-1 >> f
$ hg ci -Aqmrepo1-1
$ touch repo1-2
$ echo repo1-2 >> f
$ hg ci -Aqmrepo1-2
$ hg log --template '{rev}:{node|short} {desc|firstline}\n'
2:68c0685446a3 repo1-2
1:8a58db72e69d repo1-1
0:f093fec0529b repo1-0
$ tip1=`hg id -q`
$ cd ..
- and a clone with a not-completely-trivial history
$ hg clone -q repo1 --rev 0 repo2
$ cd repo2
$ touch repo2-1
$ sed '1i\
> repo2-1 at top
> ' f > f.tmp
$ mv f.tmp f
$ hg ci -Aqmrepo2-1
$ touch repo2-2
$ hg pull -q ../repo1 -r 1
$ hg merge -q
$ hg ci -Aqmrepo2-2-merge
$ touch repo2-3
$ echo repo2-3 >> f
$ hg ci -mrepo2-3
$ hg log --template '{rev}:{node|short} {desc|firstline}\n'
4:2f0d178c469c repo2-3
3:9e6fb3e0b9da repo2-2-merge
2:8a58db72e69d repo1-1
1:c337dba826e7 repo2-1
0:f093fec0529b repo1-0
$ cd ..
revisions from repo2 appear as appended / pulled to repo1
$ hg -R union:repo1+repo2 log --template '{rev}:{node|short} {desc|firstline}\n'
5:2f0d178c469c repo2-3
4:9e6fb3e0b9da repo2-2-merge
3:c337dba826e7 repo2-1
2:68c0685446a3 repo1-2
1:8a58db72e69d repo1-1
0:f093fec0529b repo1-0
manifest can be retrieved for revisions in both repos
$ hg -R union:repo1+repo2 mani -r $tip1
f
repo1-0
repo1-1
repo1-2
$ hg -R union:repo1+repo2 mani -r 4
f
repo1-0
repo1-1
repo2-1
repo2-2
files can be retrieved form both repos
$ hg -R repo1 cat repo1/f -r2
repo1-0
repo1-1
repo1-2
$ hg -R union:repo1+repo2 cat -r$tip1 repo1/f
repo1-0
repo1-1
repo1-2
$ hg -R union:repo1+repo2 cat -r4 $TESTTMP/repo1/f
repo2-1 at top
repo1-0
repo1-1
files can be compared across repos
$ hg -R union:repo1+repo2 diff -r$tip1 -rtip
diff -r 68c0685446a3 -r 2f0d178c469c f
--- a/f Thu Jan 01 00:00:00 1970 +0000
+++ b/f Thu Jan 01 00:00:00 1970 +0000
@@ -1,3 +1,4 @@
+repo2-1 at top
repo1-0
repo1-1
-repo1-2
+repo2-3
heads from both repos are found correctly
$ hg -R union:repo1+repo2 heads --template '{rev}:{node|short} {desc|firstline}\n'
5:2f0d178c469c repo2-3
2:68c0685446a3 repo1-2
revsets works across repos
$ hg -R union:repo1+repo2 id -r "ancestor($tip1, 5)"
8a58db72e69d
annotate works - an indication that linkrevs works
$ hg --cwd repo1 -Runion:../repo2 annotate $TESTTMP/repo1/f -r tip
3: repo2-1 at top
0: repo1-0
1: repo1-1
5: repo2-3
union repos can be cloned ... and clones works correctly
$ hg clone -U union:repo1+repo2 repo3
requesting all changes
adding changesets
adding manifests
adding file changes
added 6 changesets with 11 changes to 6 files (+1 heads)
$ hg -R repo3 paths
default = union:repo1+repo2
$ hg -R repo3 verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
6 files, 6 changesets, 11 total revisions
$ hg -R repo3 heads --template '{rev}:{node|short} {desc|firstline}\n'
5:2f0d178c469c repo2-3
2:68c0685446a3 repo1-2
$ hg -R repo3 log --template '{rev}:{node|short} {desc|firstline}\n'
5:2f0d178c469c repo2-3
4:9e6fb3e0b9da repo2-2-merge
3:c337dba826e7 repo2-1
2:68c0685446a3 repo1-2
1:8a58db72e69d repo1-1
0:f093fec0529b repo1-0