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Using Kdiff3 tool as example action to add to the SendTo menu of Thunar.
Create the following file in ~/.local/share/Thunar/sendto and name it <whatever>.desktop (I named mine ‘kdiff3.desktop’) :
# kdiff3.desktop - Integrate kdiff3 into
# the "Send To" menu.
[Desktop Entry]
Type=Application
Version=1.0
Encoding=UTF-8
TryExec=kdiff3
Exec=kdiff3 %F
Icon=kdiff3
Name=Kdiff3
# MimeType=text/plain;
The MimeType is optional so in my case (since you may compare any two files kdiff3, not just text) I commented it out.
After creating the above file (and restarting Thunar!) you will be able to select 2 or 3 files and send them to kdiff3 for comparison! To do this – right-click on the files you want to compare and navigate to to the menu shown in the picture below.
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Sashe,
Тhere is another more simple way already.
You can see here:
https://docs.xfce.org/xfce/thunar/custom-actions
Custom actions worked for me.
Custom Actions works … kinda … but there’s a catch (or two catches actually):
1. On the Advanced tab it is necessary to check all the checkboxes (Text Files, Other Files, etc);
2. Once you’ve saved your custom action, close all instances of Thunar, re-open and then right-click on a directory and you will see the ‘kdiff3’ custom action. This is important, as I tried just selecting 2 files right after I saved the new custom action but right-clicking on the files did not display the ‘kdiff3’ custom action in the context menu. It showed up after I right clicked on a directory and then worked from that point on for any selection of files and directories.
… AND …
If you just want to do this without using Thunar – edit the file ~/.config/Thunar/uca.xml, and add a new section for kdiff. So your edited ucs.xml file will look like this:
<?xml version="1.0" encoding="UTF-8"?>
<actions>
<action>
<icon>utilities-terminal</icon>
<name>Open Terminal Here</name>
<unique-id>1663937147576993-1</unique-id>
<command>exo-open --working-directory %f --launch TerminalEmulator</command>
<description>Example for a custom action</description>
<patterns>*</patterns>
<startup-notify/>
<directories/>
</action>
<action>
<icon>kdiff3</icon>
<name>kdiff3</name>
<unique-id>1696331743604650-1</unique-id>
<command>kdiff3 %F</command>
<description></description>
<patterns>*</patterns>
<directories/>
<audio-files/>
<image-files/>
<other-files/>
<text-files/>
<video-files/>
</action>
</actions>