hgweb: fix empty navigation detection
For some obscure reason, changelog.node(0) returns nullid if changelog is empty.
this break empty navigation detection. We fix this code by using the length of
the changelog.
Using the length have some issue with revision filtering but this is a small
step in the right direction. Proper fix comes in later changeset.
$ cat >> $HGRCPATH <<EOF
> [extensions]
> graphlog=
> rebase=
>
> [phases]
> publish=False
>
> [alias]
> tglog = log -G --template "{rev}: '{desc}' {branches}\n"
> EOF
$ hg init a
$ cd a
$ echo c1 > c1
$ hg ci -Am c1
adding c1
$ echo c2 > c2
$ hg ci -Am c2
adding c2
$ echo l1 > l1
$ hg ci -Am l1
adding l1
$ hg up -q -C 1
$ echo r1 > r1
$ hg ci -Am r1
adding r1
created new head
$ echo r2 > r2
$ hg ci -Am r2
adding r2
$ hg tglog
@ 4: 'r2'
|
o 3: 'r1'
|
| o 2: 'l1'
|/
o 1: 'c2'
|
o 0: 'c1'
Rebase with no arguments - single revision in source branch:
$ hg up -q -C 2
$ hg rebase
saved backup bundle to $TESTTMP/a/.hg/strip-backup/*-backup.hg (glob)
$ hg tglog
@ 4: 'l1'
|
o 3: 'r2'
|
o 2: 'r1'
|
o 1: 'c2'
|
o 0: 'c1'
$ cd ..
$ hg init b
$ cd b
$ echo c1 > c1
$ hg ci -Am c1
adding c1
$ echo c2 > c2
$ hg ci -Am c2
adding c2
$ echo l1 > l1
$ hg ci -Am l1
adding l1
$ echo l2 > l2
$ hg ci -Am l2
adding l2
$ hg up -q -C 1
$ echo r1 > r1
$ hg ci -Am r1
adding r1
created new head
$ hg tglog
@ 4: 'r1'
|
| o 3: 'l2'
| |
| o 2: 'l1'
|/
o 1: 'c2'
|
o 0: 'c1'
Rebase with no arguments - single revision in target branch:
$ hg up -q -C 3
$ hg rebase
saved backup bundle to $TESTTMP/b/.hg/strip-backup/*-backup.hg (glob)
$ hg tglog
@ 4: 'l2'
|
o 3: 'l1'
|
o 2: 'r1'
|
o 1: 'c2'
|
o 0: 'c1'
$ cd ..