shell script that configures git to use WinMerge as the default tool to handle conflicts

git-mergetool-winmerge-setup.sh

#!/bin/sh

#
# This script will make WinMerge your default tool for diff and merge.
# It must run inside git bash (on Windows)
#

#
# If you experience path issues you should give a try to the gist
# created by markusobrist at https://gist.github.com/1010253
#

# If your WinMerge is in other place then this one, please edit
WINMERGE_PATH="c:/Program Files/WinMerge"
WINMERGE_APP="WinMergeU.exe"
WINMERGE_OPTIONS="-u -e"

#
# Global setup
#
git config --global mergetool.prompt false
git config --global mergetool.keepBackup false
git config --global mergetool.keepTemporaries false

#
# Adding winmerge as a mergetool
#
git config --global merge.tool winmerge
git config --global mergetool.winmerge.name WinMerge
git config --global mergetool.winmerge.trustExitCode true
git config --global mergetool.winmerge.path "$WINMERGE_PATH"
git config --global mergetool.winmerge.cmd "$WINMERGE_APP $WINMERGE_OPTIONS -dl \"Local\" -dr \"Remote\" \$LOCAL \$REMOTE \$MERGED"

#
# Adding winmerge as a difftool
#
git config --global diff.tool winmerge
git config --global difftool.winmerge.name WinMerge
git config --global difftool.winmerge.trustExitCode true
git config --global difftool.winmerge.path "$WINMERGE_PATH"
git config --global difftool.winmerge.cmd "$WINMERGE_APP $WINMERGE_OPTIONS \$LOCAL \$REMOTE"

I've always used it inside git bash on windows and I've never experienced the issue you mentioned.
What if you try "c:/Program\ Files/Winmerge" escaping the space?

Hi Adlison

Thanks for the quick reply!
I tried that, but the config file doesn't like the backslash. The only way it worked was by specifying a .sh file as cmd and adding the following there:

"C:/Program Files (x86)/WinMerge/WinMergeU.exe" -e -dl "Base" -dr "Mine" "$1" "$2" "$3" "$4"

Maybe the issue is also the "(x86)" or that it's windows 7. I really have no idea why your approach didn't work for me.
Anyways, thanks a lot for the help and the cool script!

for completions sake the entry in the gitconfig file:
cmd = ~/winmerge.sh $LOCAL $REMOTE $BASE $MERGED

That's great. Wouldn't you like to change my gist to preserve your solution? or if you create a new one give me the link to it

I forked your gist and added my changes here:
https://gist.github.com/1010253

Hope that's alright with you?

Hi @adilsoncarvalho and @MarkusObrist,

Very useful scripts, thanks to both of you. I fixed the spaces problem by adding the WinMerge directory to PATH.

I found a difference in the third parameters for the merge tool configuration in both versions:

@adilsoncarvalho: $LOCAL $REMOTE $MERGED

@MarkusObrist: $LOCAL $REMOTE $BASE $MERGED

I also think the forth parameter will be ignored by WinMerge.

Can you clarify?