Use BeyondCompare to see difference between files in GIT

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旧时难觅i 2021-02-07 12:36

Before I commit my changes, I want to see the difference using BeyondCompare in GIT. How can I configure BeyondCompare to see difference in my files.

I looked at this li

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  • 2021-02-07 13:06

    This link tells the way to set up BeyondComapre as the diff tool in git

    git config --global diff.tool bc3
    git config --global difftool.bc3.path "c:/program files/beyond compare 3/bcomp.exe"
    

    To launch a diff using Beyond Compare, use the command "git difftool foofile.txt".

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  • 2021-02-07 13:08

    I'll just elaborate more on @SharpCoder's accepted answer.

    The first command that we run is as below:

    git config --global diff.tool bc3
    

    The above command creates below entry in .gitconfig found in %userprofile% directory:

    [diff]
        tool = bc3
    

    Then you run below command (Running this command is redundant in this particular case and is required in some specialized cases only. You will know it in a short while):

    git config --global difftool.bc3.path "c:/program files/beyond compare 3/bcomp.exe"
    

    Above command creates below entry in .gitconfig file:

    [difftool "bc3"]
        path = c:/program files/Beyond Compare 3/bcomp.exe
    

    The thing to know here is the key bc3. This is a well known key to git corresponding to a particular version of well known comparison tools available in market (bc3 corresponds to 3rd version of Beyond Compare tool). If you want to see all pre-defined keys just run git difftool --tool-help command on git bash. It returns below list:

    vimdiff
    vimdiff2
    vimdiff3
    araxis
    bc
    bc3
    codecompare
    deltawalker
    diffmerge
    diffuse
    ecmerge
    emerge
    examdiff
    gvimdiff
    gvimdiff2
    gvimdiff3
    kdiff3
    kompare
    meld
    opendiff
    p4merge
    tkdiff
    winmerge
    xxdiff
    

    You can use any of the above keys or define a custom key of your own. If you want to setup a new tool altogether(or a newly released version of well-known tool) which doesn't map to any of the keys listed above then you are free to map it to any of keys listed above or to a new custom key of your own.

    What if you have to setup a comparison tool which is

    • Absolutely new in market

    OR

    • A new version of an existing well known tool has got released which is not mapped to any pre-defined keys in git?

    Like in my case, I had installed beyond compare 4. beyond compare is a well-known tool to git but its version 4 release is not mapped to any of the existing keys by default. So you can follow any of the below approaches:

    1. I can map beyond compare 4 tool to already existing key bc3 which corresponds to beyond compare 3 version. I didn't have beyond compare version 3 on my computer so I didn't care. If I wanted I could have mapped it to any of the pre-defined keys in the above list also e.g. examdiff.

      If you map well known version of tools to appropriate already existing/well- known key then you would not need to run the second command as their install path is already known to git.

      For e.g. if I had installed beyond compare version 3 on my box then having below configuration in my .gitconfig file would have been sufficient to get going:

      [diff]
      tool = bc3
      

      But if you want to change the default associated tool then you end up mentioning the path attribute separately so that git gets to know the path from where you new tool's exe has to be launched. Here is the entry which foxes git to launch beyond compare 4 instead. Note the exe's path:

      [difftool "bc3"]
      path = c:/program files/Beyond Compare 4/bcomp.exe
      
    2. Most cleanest approach is to define a new key altogether for the new comparison tool or a new version of an well known tool. Like in my case I defined a new key bc4 so that it is easy to remember. In such a case you have to run two commands in all but your second command will not be setting path of your new tool's executable. Instead you have to set cmd attribute for your new tool as shown below:

      git config --global diff.tool bc4
      
      git config --global difftool.bc4.cmd "\"C:\\Program Files\\Beyond Compare 4\\bcomp.exe\" -s \"\$LOCAL\" -d \"\$REMOTE\""
      

      Running above commands creates below entries in your .gitconfig file:

      [diff]
      tool = bc4
      [difftool "bc4"]
      cmd = \"C:\\Program Files\\Beyond Compare 4\\bcomp.exe\" -s \"$LOCAL\" -d \"$REMOTE\"
      

    I would strongly recommend you to follow approach # 2 to avoid any confusion for yourself in future.

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  • 2021-02-07 13:21

    Beyond compare is a mergetool and a diff tool. I have it for both operations anyway. When I want to see the differences between my current state and the last commited I write

        git diff 
    

    for a fast text output and small changes and

       git difftool
    

    for changes in multiple files. Also keep in mind that you can do a git log, copy the first part of your commit's hash value and do a

       git difftool (commit1) (commit2)
    

    and compare all the files one after another (very productive and useful)

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  • 2021-02-07 13:22

    The instruction refered in the question worked last time I tried it, but I think you should run the commands in git bash and replace backslash in your path with forward slash.

    git config --global merge.tool bc
    git config --global mergetool.bc.path "C:/program files/Beyond Compare/BCompare.exe"
    
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