directaccess: don't crash when evolve is not loaded
Before this patch, when evolve was not loaded direct access was crashing. This
patch catches the error and prevents the crash.
$ cat >> $HGRCPATH <<EOF
> [extensions]
> hgext.graphlog=
> EOF
$ echo "evolve=$(echo $(dirname $TESTDIR))/hgext/evolve.py" >> $HGRCPATH
hg prev -B should move active bookmark
$ hg init
$ touch a
$ hg add a
$ hg commit -m 'added a'
$ touch b
$ hg add b
$ hg commit -m 'added b'
$ hg bookmark mark
$ hg bookmarks
* mark 1:6e742c9127b3
$ hg prev -B
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
[0] added a
$ hg bookmarks
* mark 0:a154386e50d1
hg next -B should move active bookmark
$ hg next -B
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
[1] added b
$ hg bookmarks
* mark 1:6e742c9127b3
hg prev should unset active bookmark
$ hg prev
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
[0] added a
$ hg bookmarks
mark 1:6e742c9127b3
hg next should move active bookmark
$ hg bookmark mark2
$ hg bookmarks
mark 1:6e742c9127b3
* mark2 0:a154386e50d1
$ hg next
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
[1] added b
$ hg bookmarks
mark 1:6e742c9127b3
mark2 0:a154386e50d1
$ hg bookmark -d mark2
$ hg bookmark mark
hg next/prev should not interfere with inactive bookmarks
$ touch c
$ hg add c
$ hg commit -m 'added c'
$ hg bookmark -r2 no-move
$ hg prev -B
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
[1] added b
$ hg bookmarks
* mark 1:6e742c9127b3
no-move 2:4e26ef31f919
$ hg next -B
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
[2] added c
$ hg bookmarks
* mark 2:4e26ef31f919
no-move 2:4e26ef31f919
$ hg up 1
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
(leaving bookmark mark)
$ hg next -B
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
[2] added c
$ hg bookmarks
mark 2:4e26ef31f919
no-move 2:4e26ef31f919
$ hg prev -B
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
[1] added b
$ hg bookmarks
mark 2:4e26ef31f919
no-move 2:4e26ef31f919