platform_darwin.go

package main

import (
	"path/filepath"
	"strings"

	"github.com/andybrewer/mack"
	"golang.org/x/sys/unix"
)

// For some reason UF_HIDDEN isn't defined in the syscall package. The value is
// thus copied from $(xcrun --show-sdk-path)/usr/include/sys/stat.h.
const UF_HIDDEN = 0x00008000

// hide hides a file or directory using chflags(2).
func hide(path string) error {
	return unix.Chflags(path, UF_HIDDEN)
}

// The following is a failed attempt using cgo and obj-c to implement
// openFolderAndSelect with activateFileViewerSelectingURLs. For some reason, it
// works without Lorca, but when Lorca is used, Finder becomes unresponsive until
// the Lorca app quits. Not sure which thread is blocked and how to unblock it.

// /*
// #cgo CFLAGS: -x objective-c
// #cgo LDFLAGS: -framework Cocoa -framework Foundation
// #import <Cocoa/Cocoa.h>
// void selectFile(const char *path) {
//   NSArray *files =
//       @[ [NSURL fileURLWithPath:[NSString stringWithUTF8String:path]] ];
//   [[NSWorkspace sharedWorkspace] activateFileViewerSelectingURLs:files];
//   return;
// }
// */
// import "C"
//
// func openFolderAndSelect(path string) {
//	// Convert path to absolute first.
// 	C.selectFile(C.CString(path))
// }

// openFolderAndSelect selects the file in Finder using AppleScript.
// This will lead to a permission prompt on first use.
func openFolderAndSelect(path string) error {
	abspath, err := filepath.Abs(path)
	if err != nil {
		return err
	}
	_, err = mack.Tell("Finder",
		"activate",
		`select file (`+quoteStringForAppleScript(abspath)+` as POSIX file)`)
	return err
}

// quoteStringForAppleScript quotes backslashes and double quotes.
// See "Special String Characters" in
// https://developer.apple.com/library/archive/documentation/AppleScript/Conceptual/AppleScriptLangGuide/reference/ASLR_classes.html
func quoteStringForAppleScript(s string) string {
	s = strings.ReplaceAll(s, "\\", "\\\\")
	s = strings.ReplaceAll(s, "\"", "\\\"")
	return `"` + s + `"`
}