xdg-mime未遵循$XDG_CONFIG_HOME/mimeapps.list配置的问题排查

尝试打开文件时Visual Studio Code崩溃，经排查定位到MIME关联问题：图片文件的默认处理程序失效。使用xdg-mime命令将feh.desktop设为image/jpeg类型的默认处理程序后，配置已成功写入$XDG_CONFIG_HOME/mimeapps.list，但执行xdg-mime query查询该类型的默认程序时，系统无法识别已配置的内容，尽管调试日志显示查询操作优先检查了这个配置文件。

1. 添加默认处理程序的操作日志 #

~ main• ❱ env XDG_UTILS_DEBUG_LEVEL=2 xdg-mime default feh.desktop image/jpeg
make_default_kde: No kde runtime detected
make_default_generic feh.desktop image/jpeg
Updating /home/om/.config/mimeapps.list

2. 验证配置写入结果 #

~ main• ❱ cat $XDG_CONFIG_HOME/mimeapps.list | grep image/jpeg
image/jpeg=feh.desktop

3. 查询操作的调试日志 #

~ main• ❱ env XDG_UTILS_DEBUG_LEVEL=2 xdg-mime query default image/jpeg
Checking /home/om/.config/mimeapps.list
Checking /home/om/.local/share/applications/mimeapps.list
Checking /home/om/.local/share/applications/mimeapps.list
Checking /home/om/.local/share/applications/defaults.list and /home/om/.local/share/applications/mimeinfo.cache
Checking /home/om/.local/share/applications/defaults.list and /home/om/.local/share/applications/mimeinfo.cache
Checking /home/om/.local/share/applications/defaults.list and /home/om/.local/share/applications/mimeinfo.cache
Checking /home/om/.local/share/applications/defaults.list and /home/om/.local/share/applications/mimeinfo.cache

内容的提问来源于stack exchange，提问作者Oleg Medvedyev