convert: avoid updating tags when there is nothing new
Previously, when converting from a mercurial repo there would be an extraneous
commit at the end of the convert process that would rewrite tags. Now, we check
if there are any new tags before doing this rewriting.
$ addcommit () {
> echo $1 > $1
> hg add $1
> hg commit -d "${2} 0" -m $1
> }
$ commit () {
> hg commit -d "${2} 0" -m $1
> }
$ hg init a
$ cd a
$ addcommit "A" 0
$ addcommit "B" 1
$ echo "C" >> A
$ commit "C" 2
$ hg update -C 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo "D" >> A
$ commit "D" 3
created new head
Merging a conflict araises
$ hg merge
merging A
warning: conflicts during merge.
merging A incomplete! (edit conflicts, then use 'hg resolve --mark')
1 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
Correct the conflict without marking the file as resolved
$ echo "ABCD" > A
$ hg commit -m "Merged"
abort: unresolved merge conflicts (see hg help resolve)
[255]
Mark the conflict as resolved and commit
$ hg resolve -m A
$ hg commit -m "Merged"
$ cd ..