How to update a copied bzr branch to the newest revision?

I've use "bzr branch" to copy the trunk(R1821) to the local .

And i cant update the local branch to the newest trunk(R1830).

"bzr update" just say local is the newest(R1821).

"bzr merge" & "bzr commit" will create a new local revision(R1822).

How can i just upgrade the local branch to the newest trunk revision?

And why don't use github as the development repository? It's more easier to contribute codes.

There is a git repo, have a look here:
https://simulide.forumotion.com/t1627-bzr-problem-and-need-for-git-solution#7104

About procedures to submit patch/PR:
This is up to you, send a patch here, create your fork in GitHub and send link to a commit, copy/paste code here... whatever you like the most.

arcachofo wrote:There is a git repo, have a look here:
https://simulide.forumotion.com/t1627-bzr-problem-and-need-for-git-solution#7104

About procedures to submit patch/PR:
This is up to you, send a patch here, create your fork in GitHub and send link to a commit, copy/paste code here... whatever you like the most.

That's great!

And why don't use github as the development repository? It's more easier to contribute codes.

I usually avoid to mention it, but GitHub, GitLab, Sourceforge and some other deny service to several countries.
So I'm not gonna use these sites.

arcachofo wrote:

And why don't use github as the development repository? It's more easier to contribute codes.

I usually avoid to mention it, but GitHub, GitLab, Sourceforge and some other deny service to several countries.
So I'm not gonna use these sites.

You are right. I have to access github through a proxy.