Getting the name of the directory the moment tab opens and keeping it in the memory is not expensive at all. Then it's just comparing strings and deciding whether to show the directory name or not. Since TM renders usually around 10 tabs max it should not affect performance. I don't like the tabTitle option, because the majority of files are still pretty unique and don't need any additional detailing.

On 3 Nov 2016, at 14:02, George McGinley Smith wrote: You can, though the variable is projectDirectory and you must use the ${variable} syntax when putting variables (for TextMate to expand) inside of regular expressions. So this should work: windowTitle = '${TM_DIRECTORY:+${TM_DIRECTORY/^${projectDirectory}(?:\/(.+))?/${1:+$1/}/}}$TM_DISPLAYNAME' I added logic to only add path-separator (`/`) when there is more to `TM_DIRECTORY` than just the project directory. You can use `$windowTitleSCM` as suffix for the above window title to get SCM info added (when present). For the records, this is the default window title and related variables that can be re-used in custom window titles: windowTitleSCM = '${TM_SCM_BRANCH:+ ($TM_SCM_NAME: $TM_SCM_BRANCH)}' windowTitleProject = '${projectDirectory:+ — ${projectDirectory/^.*\///}}' windowTitle = '$TM_DISPLAYNAME$windowTitleProject$windowTitleSCM'

On 1 Nov 2016, at 22:54, Igor Kozlov wrote: Yes, this is a TODO-item. The previous thread about changing the tab titles though was from a user who wanted _shorter_ tab titles.