Using Visual Studio 2012's built-in merge tool with Git

Question

So, I don't know if anyone's noticed but the new Merge Tool packaged with VS2012 is sick-o to the max. I've recently moved to Git for my source control and really want to be able to set up VS2012 as my default difftool/mergetool.

Any suggestions as to how to do this? I'd rather the diff/merge is started in the active VS2012 window and not a new instance if possible.

Answer 1

This article explains how to do this. I tried this out and it works. In my usage, the diff was opened in any existing instance of Visual Studio, which is what you preferred.

[diff]
    tool = vsdiffmerge
[difftool]
      prompt = false
[difftool "vsdiffmerge"]
      cmd = '"C:/Program Files (x86)/Microsoft Visual Studio 11.0/Common7/IDE/vsdiffmerge.exe"' "$LOCAL" "$REMOTE" //t
      keepbackup = false
      trustexitcode = true
[merge]
      tool = vsdiffmerge
[mergetool]
      prompt = false
[mergetool "vsdiffmerge"]
      cmd = '"C:/Program Files (x86)/Microsoft Visual Studio 11.0/Common7/IDE/vsdiffmerge.exe"' "$REMOTE" "$LOCAL" "$BASE" "$MERGED" //m
      keepbackup = false
      trustexitcode = true

---

Or use %VSINSTALLDIR% to always reference the version of Visual Studio that matches the commandline you have opened (this only works when the Visual Studio environment has been setup, either by using the Visual Studio Command Prompt shortcut or manually calling vsvars32.bat):

[diff]
    tool = vsdiffmerge
[difftool]
      prompt = false
[difftool "vsdiffmerge"]
      cmd = '"%VSINSTALLDIR%Common7/IDE/vsdiffmerge.exe"' "$LOCAL" "$REMOTE" //t
      keepbackup = false
      trustexitcode = true
[merge]
      tool = vsdiffmerge
[mergetool]
      prompt = false
[mergetool "vsdiffmerge"]
      cmd = '"%VSINSTALLDIR%Common7/IDE/vsdiffmerge.exe"' "$LOCAL" "$REMOTE" "$BASE" "$MERGED" //m
      keepbackup = false
      trustexitcode = true