missing UTI

[exekutive]

the UTI of my file is 'dyn.ah62d4rv4ge8063xt'
It does not show up in the UTI prefpane

mdls -name kMDItemContentType -name kMDItemContentTypeTree -name kMDItemKind (somefile)
kMDItemContentType     = "dyn.ah62d4rv4ge8063xt"
kMDItemContentTypeTree = (
    "public.item",
    "dyn.ah62d4rv4ge8063xt",
    "public.data"
)
kMDItemKind            = "Document"

[besi]

I do have the same Problem.

I have two instances of the software KiCAD. When I save a file with KiCAD 7 I can no longer open it with the old version.

So I want to open all those files with the old version by default and only some projects I will open explicitly with KiCAD7.

So I looked up the filetype with my alias:

alias filetype="mdls -name kMDItemContentType -name kMDItemContentTypeTree -name kMDItemKind"

filetype *.kicad_pro
kMDItemContentType     = "dyn.ah62d4rv4ge8004pdqfwf86dwr6"
kMDItemContentTypeTree = (
    "public.item",
    "dyn.ah62d4rv4ge8004pdqfwf86dwr6",
    "public.data"
)
kMDItemKind            = "kicad project files"

So the utility knows that it's a kicad project file but still there is no way for me to assign this type to a specific application.

If there was a way to add those dyn entries I would be very glad and I guess @exekutive would be too =)

Thanks a lot for looking into this and giving us a tool to work around one of macOS most annoying issues (IMHO).

[Lord-Kamina]

I have expressly disabled dynamic UTIs because I'm not sure exactly how dynamic they are and if they can be trusted at all or not. I might take a look into this eventually but it's not currently a big priority. Mostly I've been experimenting with converting the app to the newe APIs and SwiftUI.

[ian-h-chamberlain]

I have expressly disabled dynamic UTIs because I'm not sure exactly how dynamic they are and if they can be trusted at all or not. I might take a look into this eventually but it's not currently a big priority. Mostly I've been experimenting with converting the app to the newe APIs and SwiftUI.

Hey, I just wanted to post here to say that it seems like dynamic UTIs are in fact a relatively stable format: https://stackoverflow.com/a/16957310/14436105

Those answers/resources are slightly older, but I would guess that it's generally forward-compatible even if the format was updated (and, the linked gist appears to still work today for at least a handful of UTIs from my Mac running Sonoma).

At worst, I'd imagine that a handler would just not be used if it were set for a dynamic UTI that no longer matched a file, which seems like a fairly small caveat.

FWIW the command-line app already seems to handle these fine for setting handlers:

$ open ~/Documents/xterm-256color-italic.terminfo
No application knows how to open URL file:///Users/ianchamberlain/Documents/xterm-256color-italic.terminfo (Error Domain=NSOSStatusErrorDomain Code=-10814 "kLSApplicationNotFoundErr: E.g. no application claims the file" UserInfo={_LSLine=1741, _LSFunction=runEvaluator}).
$ swda setHandler --UTI "dyn.ah62d4rv4ge81k3pwrzy063xt" --app ~/Applications/Visual\ Studio\ Code.app
SwiftDefaultApps SUCCESS: Default handler has succesfully changed to com.microsoft.VSCode
$ open ~/Documents/xterm-256color-italic.terminfo
$ # it opened in VSCode!

Getting handlers, on the other hand does not work, unless you know the UTI ahead of time:

$ swda getUTIs | grep -i dyn
com.microsoft.windows-dynamic-link-library				/Users/ianchamberlain/Applications/Cutter.app
$ swda getHandler --UTI "dyn.ah62d4rv4ge81k3pwrzy063xt"
/Users/ianchamberlain/Applications/Visual Studio Code.app

Since these are dynamic, any UI that would handle them for setting would probably need to support dropping a file or something like that to figure out what the dynamic UTI should be - for displaying them, maybe the code I linked above would be useful just to parse out some basic details or something. As for swda getUTIs, maybe it's just a matter of filtering differently?

SwiftDefaultApps/Sources/Common Sources/LSWrappers.swift

Line 472 in 4672a7f

if ((!UTTypeIsDynamic(newUTI as CFString)) && (handledUTIs[typeRole]!.firstIndex(of:newUTI) == nil)) {

I'm guessing based on the README that the priority lately has still been updating to newer APIs and stuff so this hasn't been a focus, but just thought I'd leave this in case it's useful information!

Thanks for this app, it's very useful even with only partial dynamic UTI support!