Incomplete - started adding support for "Reinstall MAME components" menu item.

The main holdup is that the software list is loaded from those installed MAME components and reinstalling them would invalidate and require a reload.

Ample/AppDelegate.m

@@ -115,11 +115,11 @@
     
     dispatch_time_t when = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC));
     [task setTerminationHandler: ^(NSTask *task){
-       
+
+        int st = [task terminationStatus];
+        // delay so the install window is visible, I think
         dispatch_after(when, dispatch_get_main_queue(), ^{
   
-            int st = [task terminationStatus];
-
             if (st) {
                 NSAlert *alert = [NSAlert new];
                 [alert setMessageText: @"An error occurred extracting MAME components"];
@@ -238,4 +238,70 @@
 }
 
 
+-(IBAction)installMameComponents:(id)sender {
+
+      
+      /* install the mame data components. */
+      NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
+      NSBundle *bundle = [NSBundle mainBundle];
+      NSURL *sd = SupportDirectory();
+
+      NSURL *ample_url = [sd URLByAppendingPathComponent: @"Ample.plist"];
+      NSMutableDictionary *d = [NSMutableDictionary dictionaryWithContentsOfURL: ample_url];
+      
+      //NSDate *oldDate = [d objectForKey: kMameComponentsDate];
+      NSDate *newDate = [defaults objectForKey: kMameComponentsDate];
+      if (![newDate isKindOfClass: [NSDate class]])
+          newDate = nil;
+      
+      NSString *path = [bundle pathForResource: @"mame-data" ofType: @"tgz"];
+      if (!path) return; // Ample Lite?
+
+      
+      NSWindow *win = _installWindow;
+      [win makeKeyAndOrderFront: nil];
+      NSTask *task = [NSTask new];
+      NSArray *argv = @[
+          @"xfz",
+          path
+      ];
+      if (@available(macOS 10.13, *)) {
+          [task setExecutableURL: [NSURL fileURLWithPath: @"/usr/bin/tar"]];
+          [task setCurrentDirectoryURL: sd];
+      } else {
+          [task setLaunchPath:  @"/usr/bin/tar"];
+          [task setCurrentDirectoryPath: SupportDirectoryPath()];
+      }
+      [task setArguments: argv];
+
+      
+      //dispatch_time_t when = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC));
+      [task setTerminationHandler: ^(NSTask *task){
+
+          int st = [task terminationStatus];
+          dispatch_async(dispatch_get_main_queue(), ^{
+    
+              if (st) {
+                  NSAlert *alert = [NSAlert new];
+                  [alert setMessageText: @"An error occurred extracting MAME components"];
+                  [alert runModal];
+                  [win close];
+                  return;
+              }
+              
+              if (d) {
+                  [d setObject: newDate forKey: kMameComponentsDate];
+                  [d writeToURL: ample_url atomically: YES];
+              } else {
+                  [@{ kMameComponentsDate: newDate } writeToURL: ample_url atomically: YES];
+              }
+              [win close];
+              // need to reload the software list data.
+          });
+          
+      }];
+      [task launch];
+    
+}
+
 @end

Ample/Base.lproj/MainMenu.xib

@@ -45,6 +45,9 @@
                                 </connections>
                             </menuItem>
                             <menuItem isSeparatorItem="YES" id="VOq-y0-SEH"/>
+                            <menuItem title="Reinstall MAME components" hidden="YES" id="c3P-WT-eUP">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                            </menuItem>
                             <menuItem title="Preferences…" keyEquivalent="," id="BOF-NM-1cW">
                                 <connections>
                                     <action selector="displayPreferences:" target="Voe-Tx-rLC" id="Hsm-pX-sUc"/>

Ample/SoftwareList.h

@@ -39,6 +39,8 @@
 @interface SoftwareSet : NSObject <NSFastEnumeration, AutoCompleteDelegate>
 
 +(instancetype)softwareSetForMachine: (NSString *)machine;
++(void)invalidate;
+
 -(BOOL)nameIsUnique: (NSString *)name;
 
 -(NSString *)nameForSoftware: (Software *)software;

Ample/SoftwareList.m

@@ -512,9 +512,15 @@ NSArray<SoftwareList *> *SoftwareListForMachine(NSString *machine) {
     
 }
 
+
+static NSCache *cache;
++(void)invalidate {
+// called after mame components are updated.  clears the cache.
+    cache = nil;
+}
+
 +(instancetype)softwareSetForMachine:(NSString *)machine {
     
-    static NSCache *cache;
     
     if (!cache)
         cache = [NSCache new];