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How To Perform a Baseless Merge in TFS? Options

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@2021-04-01 08:34:55

The process of merging items that are not directly branched from each other is called a baseless merge. For example, you might want to merge a change between two release branches, which are siblings of each other, without merging up to the parent branch.

When you perform a baseless merge, TFS does not have any information about the relationship of the files in the branches. For example, if you have renamed a file, this will be viewed as a deleted file and a new file will be added in the branch. For this reason you have to perform more manual conflict resolutions than when you perform a normal merge.

If you are the owner/administrator of your team project, you will know the relationships between the branches or items. From Visual Studio, you can only merge the branches or items that have a parent-child relationship. If your project contains branches or items that do not have this relationship, you require to perform baseless merge.  

If you are not aware of all the relationships between the branches or items, you can evaluate whether you need to use a baseless merge as follows.

  1. Open Source Code Explorer.
  2. Right-click the branched folder and then click Merge.
  3. In the Source Control Merge Wizard dialog box, click the Target branch drop-down list.
    If you do not see an entry for the branch you want to merge, this indicates that no merge relationship exists between these branches. In this case you must perform a baseless merge.
@2021-04-01 08:38:15

You use the TFS command line tool Tf.exe to perform a baseless merge.

Set the Workspace for both branches by performing a “Get Latest” operation on the branches to be merged:

  1. Open Source Code Explorer.
  2. Right-click the folder for the first branch to be merged, and click Get Latest Version.
  3. Repeat the previous step for the second branch to be merged.

Note that if no workspace is mapped, Visual Studio prompts you to select a folder on your local drive.

  1. Open a Visual Studio command window.
  2. Run the following Tf.exe command from the command line:

Tf merge /baseless <<source path>> <<target path>> /recursive

Example

Tf merge /baseless c:\data\proj1 c:\data proj2 /recursive

If you need to merge specific versions of the code changes, you can use the version switch with Tf.exe as follows:

tf merge /baseless <<source path>> <<target
path>> / recursive /version:<<from Changeset>>~<<to
Changeset>>

Example

tf merge /baseless c:\data\proj1 c:\data\proj2 /recursive /version:C123~C125

@2021-04-01 08:56:45

You can also perform a baseless merge in Visual Studio

Set the Workspace for both branches by performing a “Get Latest” operation on the branches to be merged:

  1. Open Source Code Explorer.
  2. Right-click the folder for the first branch to be merged, and click Get Latest Version.
  3. Repeat the previous step for the second branch to be merged.
  4. Righ-click on source branch and choose Branching and Merging -> Merge...
  5. Follow the merge wizard to select the target and source branch and let VS complete the merge.
@2021-04-01 12:30:23

After you run the Tf.exe command, it displays a Resolve Conflicts dialog box with a list of the files that have conflicts.

Select each file and click Resolve.

In the Resolve version conflict dialog box:

  1. If there are no content changes, select the Keep changes in the target branch resolution option and then click OK.
  2. If there are content changes, select the Merge changes in merge tool resolution option, and then click OK.

In the merge tool, click the conflict regions in the upper pane or type in the lower pane to apply changes for each conflicting line.

After you have applied changes for all of the conflicts, click OK in the merge tool.

After all the conflicts have been resolved, click Close.

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