I have a branch which I am doing the changes seperately. Other team mates doing the changes in trunk. Scenario is, now I want to give a release including trunk updates + my branch updates. Since I haven't done the complete module yet, I don't want to merge branch to the trunk. Instead I want to create another new branch from trunk and then merge my branch changes to that new Branch. So that I can have the new branch fully updated with my branch updates + latest trunk updates.
I'm using tortoise svn merge and this is what I did:
Let's say in trunk there is a newly added file : A, which is not having in my branch. So the newly created branch also having the file A. (I used the merge option: "Merging Two Different Trees") I go to new branch folder and gave that branch url to the [FROM] field and gave my branch url for the [TO] field. When I did the merge it deletes that A file from the local copy. Apparently what I understand is, merging has taken the new branch state to my branch state, instead of integrating the changes.
What I want is to merge my branch changes to the new branch, without loosing the latest changes that new branch is having. So that I can have the new branch: latest trunk modifications + my branch changes.
How to do this?
Perform fresh checkout of your repository
Precondition:( Suppose your repository name: Team )
1. You have trunk( Main Dev )
2. You have branch ( Your changes )
3. Create say "newbranch" from trunk.[ TortoiseSVN->Branch/tag][ Picture1 }Note:Select Head revision
4. Perform svn Update inside "Team"->So newBranch is updated.[picture2]
5. Now, select newbranch and merge[Tortoisesvn->Merge][Picture3]
6. Select default "Merge a range of revision", to select revisions which you only intrested to merge.[[Picture4]
7. Click, showlog to select required revisions you intrested on[picture5]
Finaly merge is completed[picture6]
**Note: If Conflicts comes across, then merge conflict revisions manually.
I would create a new branch from trunk and than merge your branch in the new branch via Merge a range of revisions. Because the new branch is newer all should work fine.
来源：https://stackoverflow.com/questions/18308584/merge-two-branches-using-tortoise-svn