checknlink: return False if .hgtmp file preexists (issue2517)
If os_link fails on Windows, errno is always errno.EINVAL,
so we can't really say if the testlink could not be created
because (a) the FS doesn't support hardlinks or (b) there
is a leaked .hgtmp file lying around from a previous crashed
run.
So let's err on the safe side, keep the code simple and assume
we can't detect hardlinks in both cases.
$ cat > $HGRCPATH <<EOF
> [extensions]
> graphlog =
> convert =
> [convert]
> hg.saverev = yes
> EOF
$ glog()
> {
> hg -R "$1" glog --template '{rev} "{desc}" files: {files}\n'
> }
$ hg init source
$ cd source
$ echo a > a
$ echo b > b
$ hg ci -d '0 0' -qAm '0: add a b'
$ echo c > c
$ hg ci -d '1 0' -qAm '1: add c'
$ hg copy a e
$ echo b >> b
$ hg ci -d '2 0' -qAm '2: copy e from a, change b'
$ hg up -C 0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo a >> a
$ hg ci -d '3 0' -qAm '3: change a'
$ hg merge
merging a and e to e
2 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg copy b d
$ hg ci -d '4 0' -qAm '4: merge 2 and 3, copy d from b'
$ echo a >> a
$ hg ci -d '5 0' -qAm '5: change a'
$ cd ..
Convert from null revision
$ hg convert --config convert.hg.startrev=null source full
initializing destination full repository
scanning source...
sorting...
converting...
5 0: add a b
4 1: add c
3 2: copy e from a, change b
2 3: change a
1 4: merge 2 and 3, copy d from b
0 5: change a
$ glog full
o 5 "5: change a" files: a
|
o 4 "4: merge 2 and 3, copy d from b" files: d e
|\
| o 3 "3: change a" files: a
| |
o | 2 "2: copy e from a, change b" files: b e
| |
o | 1 "1: add c" files: c
|/
o 0 "0: add a b" files: a b
$ rm -Rf full
Convert from zero revision
$ hg convert --config convert.hg.startrev=0 source full
initializing destination full repository
scanning source...
sorting...
converting...
5 0: add a b
4 1: add c
3 2: copy e from a, change b
2 3: change a
1 4: merge 2 and 3, copy d from b
0 5: change a
$ glog full
o 5 "5: change a" files: a
|
o 4 "4: merge 2 and 3, copy d from b" files: d e
|\
| o 3 "3: change a" files: a
| |
o | 2 "2: copy e from a, change b" files: b e
| |
o | 1 "1: add c" files: c
|/
o 0 "0: add a b" files: a b
Convert from merge parent
$ hg convert --config convert.hg.startrev=1 source conv1
initializing destination conv1 repository
scanning source...
sorting...
converting...
3 1: add c
2 2: copy e from a, change b
1 4: merge 2 and 3, copy d from b
0 5: change a
$ glog conv1
o 3 "5: change a" files: a
|
o 2 "4: merge 2 and 3, copy d from b" files: a d e
|
o 1 "2: copy e from a, change b" files: b e
|
o 0 "1: add c" files: a b c
$ cd conv1
Check copy preservation
$ hg log --follow --copies e
changeset: 2:79818a521a40
user: test
date: Thu Jan 01 00:00:04 1970 +0000
summary: 4: merge 2 and 3, copy d from b
changeset: 1:3e6201832cce
user: test
date: Thu Jan 01 00:00:02 1970 +0000
summary: 2: copy e from a, change b
Check copy removal on missing parent
$ hg log --follow --copies d
changeset: 2:79818a521a40
user: test
date: Thu Jan 01 00:00:04 1970 +0000
summary: 4: merge 2 and 3, copy d from b
$ hg cat -r tip a b
a
a
a
b
b
$ hg -q verify
$ cd ..
Convert from merge
$ hg convert --config convert.hg.startrev=4 source conv4
initializing destination conv4 repository
scanning source...
sorting...
converting...
1 4: merge 2 and 3, copy d from b
0 5: change a
$ glog conv4
o 1 "5: change a" files: a
|
o 0 "4: merge 2 and 3, copy d from b" files: a b c d e
$ cd conv4
$ hg up -C
5 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg cat -r tip a b
a
a
a
b
b
$ hg -q verify
$ cd ..