如果从SourceTree打开p4merge有问题，请在MyRepo下查找名为config的本地配置文件。Git并删除任何合并配置。 在我的例子中，它试图打开我刚刚卸载的Meld

为了跟进Charles Bailey的回答，这里是我使用p4merge(免费跨平台3way合并工具)的git设置;安装msys Git (Windows):

git config --global merge.tool p4merge
git config --global mergetool.p4merge.cmd 'p4merge.exe \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\"'

或者，在Windows cmd.exe shell中，第二行变成:

git config --global mergetool.p4merge.cmd "p4merge.exe \"$BASE\" \"$LOCAL\" \"$REMOTE\" \"$MERGED\""

变化(相对于查尔斯·贝利):

added to global git config, i.e. valid for all git projects not just the current one the custom tool config value resides in "mergetool.[tool].cmd", not "merge.[tool].cmd" (silly me, spent an hour troubleshooting why git kept complaining about non-existing tool) added double quotes for all file names so that files with spaces can still be found by the merge tool (I tested this in msys Git from Powershell) note that by default Perforce will add its installation dir to PATH, thus no need to specify full path to p4merge in the command

下载:http://www.perforce.com/product/components/perforce-visual-merge-and-diff-tools。

编辑(2014年2月)

正如@Gregory Pakosz所指出的，最新的msysgit现在“本地”支持p4merge(在1.8.5.5.2 .msysgit.0上测试)。

您可以通过运行以下命令显示支持的工具列表:

git mergetool --tool-help

您应该在可用或有效列表中看到p4merge。如果没有，请更新git。

如果p4merge被列出为可用，它在你的PATH中，你只需要设置merge.tool:

git config --global merge.tool p4merge

如果它被列为有效的，则必须定义mergetool.p4merge。除了merge.tool之外的路径:

git config --global mergetool.p4merge.path c:/Users/my-login/AppData/Local/Perforce/p4merge.exe

The above is an example path when p4merge was installed for the current user, not system-wide (does not need admin rights or UAC elevation) Although ~ should expand to current user's home directory (so in theory the path should be ~/AppData/Local/Perforce/p4merge.exe), this did not work for me Even better would have been to take advantage of an environment variable (e.g. $LOCALAPPDATA/Perforce/p4merge.exe), git does not seem to be expanding environment variables for paths (if you know how to get this working, please let me know or update this answer)

我不得不在windows 7上使用msysGit删除额外的引用，不知道为什么。

git config --global merge.tool p4merge
git config --global mergetool.p4merge.cmd 'p4merge $BASE $LOCAL $REMOTE $MERGED'

在Cygwin的指导下，唯一对我有用的是:

git config --global merge.tool myp4merge
git config --global mergetool.myp4merge.cmd 'p4merge.exe "$(cygpath -wla $BASE)" "$(cygpath -wla $LOCAL)" "$(cygpath -wla $REMOTE)" "$(cygpath -wla $MERGED)"'
git config --global diff.tool myp4diff
git config --global difftool.myp4diff.cmd 'p4merge.exe "$(cygpath -wla $LOCAL)" "$(cygpath -wla $REMOTE)"'

另外，我喜欢关闭difftool的提示信息:

git config --global difftool.prompt false

IntelliJ IDEA (Community Edition)在Windows环境下配置3路git合并工具(~/.gitconfig)

Cygwin

[mergetool "ideamerge"]
     cmd = C:/Program\\ Files\\ \\(x86\\)/JetBrains/IntelliJ\\ IDEA\\ Community\\ Edition\\ 14.1.3/bin/idea.exe merge `cygpath -wa $LOCAL` `cygpath -wa $REMOTE` `cygpath -wa $BASE` `cygpath -wa $MERGED`
[merge]
     tool = ideamerge

Msys

[mergetool "ideamerge"]
cmd = "/c/Program\\ Files\\ \\(x86\\)/JetBrains/IntelliJ\\ IDEA\\ Community\\ Edition\\ 14.1.3/bin/idea.exe" merge `~/winpath.sh $LOCAL` `~/winpath.sh $REMOTE` `~/winpath.sh $BASE` `~/winpath.sh $MERGED`
[merge]
 tool = ideamerge

~/winpath.sh用于在msys上转换路径到Windows，取自stackoverflow上的msys路径转换问题

#! /bin/sh                                                               

function wpath {                                                         
    if [ -z "$1" ]; then                                                 
        echo "$@"                                                        
    else                                                                 
        if [ -f "$1" ]; then                                             
            local dir=$(dirname "$1")                                    
            local fn=$(basename "$1")                                    
            echo "$(cd "$dir"; echo "$(pwd -W)/$fn")" | sed 's|/|\\|g';  
        else                                                             
            if [ -d "$1" ]; then                                         
                echo "$(cd "$1"; pwd -W)" | sed 's|/|\\|g';              
            else                                                         
                echo "$1" | sed 's|^/\(.\)/|\1:\\|g; s|/|\\|g';          
            fi                                                           
        fi                                                               
    fi                                                                   
}                                                                        

wpath "$@" 

设置mergetool.p4merge。cmd将不再工作，因为Git已经开始尝试支持p4merge，请参阅libexec/ Git -core/ Git -mergetool——lib。所以我们只需要为git指定mergetool路径，例如p4merge:

git config --global mergetool.p4merge.path 'C:\Program Files\Perforce\p4merge.exe'
git config --global merge.tool p4merge

那么它就会起作用。