Launch Finder window with specific files selected - objective-c

Question

I'm trying to programmatically launch an OS X Finder window from an Xcode project. I need the window to open to a specific folder and have specific files within that folder automatically selected.
This is similar to the "Show in Finder" functionality used in Xcode and related apps.
Does anyone know how to do this in either Objective-C, Swift, AppleScript, or Finder command-line parameters?

Answer 1

Objective-C version:
NSArray *fileURLs = [NSArray arrayWithObjects:fileURL1, /* ... */ nil];
[[NSWorkspace sharedWorkspace] activateFileViewerSelectingURLs:fileURLs];

Answer 2

$ open -R <path-to-reveal>

Answer 3

Another AppleScript flavor - the Finder's reveal command will both open a window to the containing folder and select the item(s). If there are multiple containing folders, multiple Finder windows will be opened.
tell application "Finder"
to reveal {someAlias, "path/to/POSIXfile" as POSIX file, etc}

Answer 4

Swift version:
let paths = ["/Users/peter/foo/bar.json"]
let fileURLs = paths.map{ NSURL(fileURLWithPath: $0)}
NSWorkspace.sharedWorkspace().activateFileViewerSelectingURLs(fileURLs)

Answer 5

I'm finding that activateFileViewerSelectingURLs is not working on Yosemite (at least when in separate space from Finder). It will cause a switch to the Finder's space but won't seem to select the URL. Using:
- (BOOL)selectFile:(NSString *)fullPath inFileViewerRootedAtPath:(NSString *)rootFullPath
will switch spaces from full screen app and select path.

Answer 6

When opening a file at path:
NSString* path = #"/Users/user/Downloads/my file"
NSArray *fileURLs = [NSArray arrayWithObjects:[NSURL fileURLWithPath:path], nil];
[[NSWorkspace sharedWorkspace] activateFileViewerSelectingURLs:fileURLs];

Answer 7

Swift 3.2/4.0 Version:
NSWorkspace.shared.activateFileViewerSelecting([outputFileURL])

Answer 8

Reveal multiple files in Finder
As open -R <path-to-reveal> only works for single file.
We can use Apple Script instead.
From user866649's answer, we can port it to a shell script as the following:
osascript -e 'tell application "Finder" to reveal {"path/to/file1" as POSIX file, "path/to/file2" as POSIX file} activate'
Just created a utility script:
finder.sh
#!/usr/bin/env bash
join() {
local d=$1 s=$2
shift 2 && printf %s "$s${#/#/$d}"
}
lst=()
for f in "$#"; do
lst+=("\"$f\" as POSIX file")
done
files=$(join , "${lst[#]}")
osascript -e "tell application \"Finder\" to reveal {$files} activate"
Then try it:
chmod +x finder.sh
./finder.sh ~/Downloads ~/Desktop
It should open Finder and selects both Downloads and Desktop folder.