macOS: fix missing qt framework issue during app packaging

  Add code to locate and correct missing Qt framworks "skipped" by
  macdeployqt when bundling the mythfrontend app.  This issue only
  occurs on homebrew based builds that use QtWebengine.

  For some reason, QtQuickWidgets.framework does not get
  copied into the app framework by macdeployqt. This update searches
  for any missing Qt frameworks, copies the missing frameworks into the
  app bundle, and corrects any libraries contained in the framework.

Author: jhoyt4

platform/darwin/fixAppBundle.zsh

@@ -110,6 +110,33 @@ installLibs(){
   done <<< "$pathDepList"
 }
 
+fixMissingQt(){
+  # occasionally macdeployqt misses some linked Qt frameworks that are rpathd in a non-standard way
+  # We need to find the missing frameworks, copy them into the app bundle, and link them appropriately
+
+  # find all @rpath Qt Frameworks
+  QT_FMWKS=$(otool -L $APP_FMWK_DIR/Qt*.framework/Versions/Current/Qt*|grep "@rpath"|grep "Qt.*framework"|sort -u|sed 's^.*@rpath/^^'  | sed 's^\.framework.*^.framework^')
+  while read qtFMWK; do
+    if [ ! -d $APP_FMWK_DIR/$qtFMWK ]; then
+      echo '\033[0;34m'"      +++ installLibs: Installing $qtFMWK into app"'\033[m'
+      # copy in the Qt* framework and set variables
+      sourcePath=$(find "$PKGMGR_PREFIX" -name "$qtFMWK" -print -quit)
+      cp -RHn "$sourcePath" "$APP_FMWK_DIR/"
+      libName=${qtFMWK%".framework"}
+      # update the framework's library file ID to point to its new position in the app bundle
+      # install name tool needs the real file, so use greadlink to get the final path from the symlink
+      libFile=$(greadlink -f $APP_FMWK_DIR/$qtFMWK/$libName)
+      newID="@executable_path/../Frameworks/$qtFMWK/Versions/Current/$libName"
+      NAME_TOOL_CMD="install_name_tool -id $newID $libFile"
+      eval "${NAME_TOOL_CMD}"
+      # update links to (and copy in missing) any linked libraries required by the framework
+      installLibs $libFile
+    fi
+  done <<< "$QT_FMWKS"
+}
+
+# Fix any Qt Frameworks missed by macdeployqt
+fixMissingQt
 # Look over all dylibs in the APP Bundle and correct any dylib path's that macdeployqt misses.
 for fileName in $APP_CONTENTS_DIR/**/*(.); do
   if [[ -d $fileName || -L $fileName ]]; then continue; fi