The Mac developer scene is loaded with a lot of helpful and supportive developers out there, sharing ideas, code and encouragement with one another. I’ve benefitted from the development community, as have the Mori and Clockwork code. I say this not only as one who’s currently putting new code into them, but seeing the comments Jesse left in the code before me!

So I’d like to drop an idea into your lap you might find useful for the right type of application. As there are different types of software one can develop, e.g., operating systems, utilities, paint programs and the like, they have particular usage characteristics that they encourage. Some, like digital notebooks and desktop timers for example *cough*, tend to remain in operation while the user is logged into his account. Usually, this isn’t a problem for the user. Unless, of course, the user is also someone further developing said software. Then several questions have to be answered, such as, “How do I run unit tests on builds while still running a stable version of my app?” and “How do I try out the latest build without affecting the files which are currently open in my app?”

On operating systems based on more primitive process management, it isn’t troublesome because each built application is fairly independent of others, and often multiple invocations of a single app can be run concurrently. It wasn’t problematic on the Mac either back on MacOS 9 and earlier, and even in the early MOX releases. But now with Launch Services, running test versions of apps you run on an all-day basis can be problematic. It’s best to give that test version some different signature so its defaults and file changes don’t corrupt your normal environment.

Note that this tip doesn’t prevent two versions from munging the same files; even two unrelated apps can mess up a data file if they’re updating it at the same time. What this tip does is provide an alternate identity, if you will, for test builds so MOX doesn’t try to hand it the same data set it gives the release builds of your app. You mustn’t try to open files in the test build that are currently opened by a release build.

Here’s how I do it:

1. In the Info.plist file, use the C pre-processor’s conditional compilation directive to give your app its normal metadata when a release build is made, but a special set of metadata for all other build configurations:

#if defined(Release)
<key>CFBundleIdentifier</key>
<string>com.apokalypsesoftware.Mori</string>
#else
<key>CFBundleIdentifier</key>
<string>com.apokalypsesoftware.Mori-debug</string>
#endif

Update: I forgot to mention that Xcode 3 and later versions now use specialized editors for the Info.plist files. To override this editor selection, bring up the file’s Info window (by selecting the file and pressing cmd-I) or the Inspector window and change the File Type setting from “text.plist.whatever” to “text”. Once you add the conditional to Info.plist you can change File Type back and access Info.plist in its raw form from its target’s Properties tab. That way, you can view it in either mode within Xcode. However, making any changes in Xcode’s plist editor will wipe out any conditional directive in the file, so use it only for reviewing current settings, not for actual editing!

2. In the Target Info window (brought up via the ‘Project > Edit Active Target “Mori”‘ menu item), select the Build tab, specify “All Configurations” for the Configuration pop-up menu, and enter “plist” in the search toolbar widget to bring up the relevant setting items.

3. For the “Info.plist Other Preprocessor Flags” setting, enter -traditional as the value. While not needed to support the test version twin, it will help to prevent any URLs included in the Info.plist from being swallowed up by the pre-processor and possibly causing you sleepless nights because neither MOX nor the Xcode build system have the slightest idea of what the proper format for URLs are, but will behave erratically when it isn’t just so. So it’s best to make it a non-issue from the start. (No charge for that and other tips related to usage of the pre-processor you can find in Technical Note TN2175. Incidentally, TN2175 says to use “-traditional”, but I use “-CC”. Use whatever works for the version you’re on.)

4. For the Info.plist Preprocessor Definitions setting, enter $(CONFIGURATION). Xcode will change the display to read <multiple values>, but that’s okay because the value will vary according to the current build configuration. It will define a value that matches the build configuration that the pre-processor will test against in the Info.plist. (Try switching the setting in the Configuration pop-up menu of the Build tab to watch the value change to match the current setting.) This is what will direct the pre-processor to output the correct value for CFBundleIdentifier.

5. Check the Preprocess Info.plist File checkbox so Xcode invokes the pre-processor on the Info.plist before copying it to the application.

When built, you’ll be able to run the app concurrently with the release version, and without causing conflicts with data files in use by it. Of course, you won’t have your preferences set up, but that’s only a problem until you save preferences for the test version. (Remember, if you try to get around that problem by copying the release version’s defaults file that it also holds the recently opened files. Purge, close or what-have-you as appropriate!)

One of the extra things I attempted to do in this technique was to provide an alternate name for the private builds or test versions so they would be distinctly named for testers. We used to use naming conventions such as “Mori 1.7β4″ when distributing such versions back in the pre-MOX days, but including the metadata keys CFBundleExecutable, CFBundleName, and CFBundleDisplayName don’t have any noticeable effect. Any tips in this regard would be greatly welcomed.

I had also attempted to get the pre-processor to generate the bundle identifier with “Mori-$(CONFIGURATION)” that fit whatever build configuration was in effect automatically, which would’ve avoided the use of the #if defined directive. Unfortunately, because the macro expansion would generate Mori-Release that method proved ineffective.

A corresponding idea is to use an alternate icon (via the CFBundleIconFile specifier) to represent the test version of your app. It helps you and your testers realize when odd behavior is due to running the wrong build just by looking at the dock or application-switcher. It’s also fun to double-click a document only to realize the test app is opening vital data meant only for the stable version. Hilarity is sure to ensue. But I’m a professional, don’t you kids try this at home!

If you don’t have the construction guy handy, you can resort to the technique I used before I discovered Info.plist processing: MOX’s own stamping of missing dock files makes for a handy visual guide to your test app. To try it yourself, add the debug version from within your build/Debug folder to your dock items. That’s right, the debug version (or whatever you use for test builds). Now delete it and empty the trash. (You will be building new ones, won’t you?) Now click on the app icon you just added to the dock. It adds a big fat ‘?’ to your lovely icon, doesn’t it? (At least it should if you deleted the correct icon.) Now rebuild your app and run it from within Xcode.

Now bring up the application switcher (cmd-tab). What do you see? A big fat ol’ ‘?’ emblazoned on the debug version of your app! Oh, you don’t? You see the normal icon? Yeah, you’re on Leopard, aren’t you? This trick doesn’t work as well on Leopard because MOX validates the file state more often than Tiger did. Such as, starting the test build from the Dock instead of only within Xcode. On Leopard, clicking on the dock icon when there’s a built debug version of your app in the debug folder will restore its unstamped icon. But anytime the question mark goes away, just delete the debug version, empty the trash, and click on the dock icon again.

Have fun, and keep ‘em flying!

While making the changes to Mori’s code for 1.7, I encountered some oddities in test results, and it turned out there was a bug which I had introduced in an earlier release. While it doesn’t appear to endanger data in Mori notebooks, it might not return all the results you expect in a search, or in entry summaries.

In addition, it has what I hope are a couple of performance improvements, continued improvements to Italian localization, and a work-around for Leopard’s insistence to treat non-Apple Spotlight metadata files as third-class citizens.

Normally when Spotlight discovers a file has been created or changed, it will ask the responsible program to figure out what’s inside, and feed it back to Spotlight. But one of the drawbacks to Spotlight’s design is it lacks the ability to define containers, or documents which contain logically distinct elements such as the chapters of a book, pictures in a photo album, or entries from a Mori notebook; and which can nest other containers as well. Treating a document as a single entity, Spotlight will open a document at the beginning (or maybe the place where the cursor was the last time it was open), even if what you’re looking for is somewhere near the end.

Because it doesn’t understand that a file can have distinct elements, the development teams for other Apple software (e.g., iPhoto, Safari, Stickies, etc.) came up with a scheme to trick Spotlight by creating new files with the data for those elements. So that’s how Jesse coded Mori’s behavior: duplicate the data for that logically distinct element in its own file. A separate copy of each element’s data in its own file. One extra file per element. That means the space taken up by your data is easily half again more than if Apple just added a container definition for Spotlight metadata (once for the notebook, another for the entry metadata file, and the third copy in Spotlight’s database).

But that isn’t all. While we’d like to keep all those extra files inside a notebook bundle (a directory which Finder treats as a file), because Spotlight treats a document as a single element it won’t look for those files inside the bundle. So Mori creates those files in the metadata cache folder (in your Library/Caches/Metadata folder), along with the metadata files from some of Apple’s programs. If you open the metadata folder and look at these files, you’ll see they have numbers to help Mori figure out which entry contains that data. But when you do a search using the Spotlight menu, and when you select menu item ‘Show All’ and the results are displayed in the Finder, you won’t see the numbers; you’ll see the titles for the entries they represent.

Leopard however, isn’t so democratic; which is why users where complaining about the entries when Leopard was released. First off, it ignores any non-Apple metadata files in the cache folder unless you set your Spotlight preferences to use those files. Secondly, it will ignore the title info embedded in the entry metadata file and just display the file’s actual title, meaning the number. How’s that for Apple undermining the work of third-party developers?

So the workaround I came up with is to add the entry’s title (or Untitled, if it has none) at the beginning of the filename, so you at least have an idea which entry matches your search terms.

(Thanks for wasting about a whole month total of my development time on that alone, Apple. I feel the love.)

I am, of course, more than happy to eat crow should I be proven to be completely mistaken or speaking from out-dated information. It’s easily worth it in order to improve the user experience.

Regardless of the rationale for the design decisions, enjoy, and thank you for being part of the community and continuing to support Mori!

While trying to solve a user’s problem with an mGTD script, I came across a subtle issue that demonstrates some issues that arise when violating a programming philosophy, tackling bugs in other people’s code, and general uncertainty whenever coding in AppleScript.

Working with AppleScript is generally considered iffy, because a lot seems ambiguous and so much is dependent on how the dialect is interpreted and how scriptable apps handle some of the application events which scripting is dependent on. I’ve written scripts before, some I’m pretty awed by (that it works, actually, but also what it does), but I’m still hesitant to tackle some scripting issues. In addition, being a GTD greenhorn, and an mGTD noob made trying to respond to this issue authoritatively very questionable.

Thankfully, BMEGuy, mGTD’s author and all-around community nice guy, tackled the question with a quick solution. But the updated script was still problematic, and so I felt I really needed to participate in coming up with a solution.

Again, being an mGTD noob and all, it took me at least half an hour to figure out how the plugin worked, and the script on top of that. Then, after I was able to get the script to run, it worked for me. Hmm.

But that’s because I was testing with an entry with a date due of today. Once I switched it to later in the week, the entry was still showing up for today. Isn’t that odd? It seemed I had inadvertently left in the date line from the original script. When I removed it, I witnessed the same problem.

It turns out there’s a bug in MOX 10.4.11’s iCal 2.0.5 (I’m guessing it’s present in earlier versions as well) where it doesn’t properly update the calendar display for new events made by the script. You won’t see it in the monthly view. However, you might notice a little oddness in the weekly view.

You can see the event if you add ’show theEvent’ after the script makes a new display alarm for the event (between the 2nd and 3rd ‘end tell’ up from the bottom). This will display it’s properties in the info drawer, but you won’t see the event anywhere on the calendar (in either week or month view) until iCal is restarted.

Running the script in monthly view doesn’t show any artifact in the calendar, but the data is shown in the info drawer.

You could also run the script in the weekly view and then switch to the monthly view, in which case you get this:

So now that the question of the event’s presence in the calendar was settled in my mind, I had to figure out why my faulty script displayed the event, but not the proper one; and how to coax iCal to display it.

Being unfamiliar with mGTD still, I tried to figure out the difference between the attribute name “dateDue” and due date. due date is one of the standard properties for entries in a Mori document. attribute name “dateDue” is a user column added in the example mGTD notebook. You can view them all the user columns by selecting the menu item Edit > Edit Notebook Columns…

Okay, good so far, but why would one cause iCal to display properly and not the other? After moving the due date line about for a while, I checked Script Editor’s Event Log, and saw

The event reply for the due date had a missing value! Mori wasn’t returning a value for the due date property because it wasn’t set (and wouldn’t be in the example notebook). Now I had to find a way to use one of those missing values to make theEvent visible without setting it to the wrong date. And the problem with that is most of the properties used in Mori’s entries aren’t appropriate for an iCal event.

I eventually thought about re-ordering the messages to iCal instead of being so fixated on a change in the messages to Mori or playing with the properties being set in creating the event. What I came up with was a plan to use the messed up missing value date as before to make the event visible first, and then set the date correctly. The code turned out like this:

tell application "Mori"
	tell current entry
		set theDate to (get attribute name "dateDue")
		set faultyDate to due date
		set theName to name
		set theNote to note
	end tell
end tell
tell application "iCal"
	tell calendar "Scramble" -- the user should specify the name of the target calendar here
		set theEvent to make new event at end with properties {description:theNote, summary:theName, start date:faultyDate, allday event:true}
		tell theEvent
			make new display alarm at end with properties {trigger date:theDate}
		end tell
		-- show theEvent
		set theEvent's start date to theDate
	end tell
end tell

And to my surprise, it worked! So as I began gathering the materials together for my reply to the issue, I noticed something in the event’s info drawer that had escaped my attention before:

iCal, that’s just crazy talk! But at least it would explain why it would display traces of an event, if anything at all; and why it wasn’t noticeable earlier: iCal would correct the event data when reading it in when it started (”iCal database, that’s just crazy talk!”). But somebody forgot to add a sanity check when creating a new event from the properties passed to it by our script. (This is an example of why the Once and Only Once principle should be heeded. If there’s only one place where events are synthesized from pre-recorded values, whether those values are from a stored file, a script or the UI, then all those code paths will benefit from any sanity checks added to event creation.)

Knowing this, here’s another means of working around this bug, by sending iCal info that won’t confuse it:

tell application "Mori"
	tell current entry
		set theDate to (get attribute name "dateDue")
		-- set faultyDate to due date
		set theName to name
		set theNote to note
	end tell
end tell
tell application "iCal"
	tell calendar "Scramble" -- the user should specify the name of the target calendar here
		set theEvent to make new event at end with properties {description:theNote, summary:theName, start date:theDate, end date:(theDate + 1), allday event:true}
		tell theEvent
			make new display alarm at end with properties {trigger date:theDate}
		end tell
		-- show theEvent
		-- set theEvent's start date to theDate
	end tell
end tell

Thinking about these two solutions it’s clear that picking the latter one, with well-formed properties, is the safest choice to make. Here’s additional proof: the first solution, the one which plays with the start date to make the event appear, will indeed make the event appear. But if there’s less than 24 hours until the event begins, it will appear on the wrong date and still require iCal to be restarted to appear in the proper location!

It just goes to show you, while you might be able to get away with just the barest minimum, and someone else might normally clean up after you, it’s best if you did the job correctly from the start in case your safety net disappears from under you.

As I was reviewing the code changes I had made, I slowly realized that the Mac’s user preferences system had a minor philosophical flaw which makes for dangerous situations in the program.

One of the goals of this version is improved recovery from faulty stored values relating to the preferences and UI, so you can continue with only minor inconvenience and perhaps a need to again set preferences to your liking. Not adequately performing this resulted in some of the missing toolbar and empty window problems that were experienced before. (For a more exciting example of cascading faults, read about the 2003 Northeast blackout.)

So after some delays in getting the unit tests for this new component to execute properly, I’m now adding that component into the program. Once I have the Cocoa preferences system replaced, I’ll be releasing 1.6.8. Then I’ll work on the possible fix for the SpotLight ‘odd name’ bug for a quick-turnaround (later today) 1.6.9.

If that particular bug can’t be quickly fixed, I’ll work on some other long-standing issues in Mori for an update that will be released after a few days.

Incidentally, Tobias had a valid concern regarding the update process: “Where does testing feature in this? In olden times an update was a build with only known problems since a few people played with it for a week before it was awarded a version number. WebKit offers a choice between bleeding edge nightly r1234 and release 3.0.”

I plan to continue to rely on the Beta Test Group for testing updates, with a release candidate at least one version ahead of what is shipping. However, at the time of this writing there are 320 open bug reports for Mori, even after having pre-release testing candidates as part of the process. That just isn’t right.

I’m primarily depending on the unit tests to prevent shipping defects to you. They serve to expose bugs in existing and new code; and by adding tests for the types of bugs identified in the bug reports, the tests will continue becoming more valuable to the release process.

The purpose is to continuously speed up the process by improving its results. It shouldn’t be a shock when a program works right off the bat. The delays are (partly) associated with having so many steps of repeated inspections on the same system. It multiplies the time it takes to get a new release out the door. The less I tolerate it, the quicker it gets done correctly.

Because of the difficulties fixing the toolbar bugs and getting Leopard compatibility complete (or reasonably so), Mori has quickly approached version 1.6.10 (not yet, only 1.6.7 has been released so far, but bear with me). This has some odd psychological barrier attached to it, as we seem to recognize it as a significant occasion, a hurdle we do not wish to cross.

I’ve been collecting fixes into a single release, attempting to conserve version numbers. There’s currently improved “Check and Repair Notebook”, more cautious handling of user preferences, improved Italian localization, a fix on the Drag and Drop stall, clearing of compiler warnings, some refactorings, and more unit tests. A couple more fixes I’d like to incorporate into this one: fixed word count (whether it’s in English or Greek), correct Smart Folder behavior and making wildcards optional in search terms.

But anything.10 is an artificial milestone, rather than a significant one. And MOX has already passed it and even gone on to 10.4.11, so what’s troublesome about it now? And with the new versioning class I added to Mori back in 1.6.4 or so, it should be able to handle even version 1.6.99 if necessary!

So I’ll be trying to post new updates more frequently. I’m not certain how frequently it’ll be, but I’d like to get to the point where there was a nightly build, like the Safari team provides. That’s too frequent for most users, of course, but then you’d be able to skip a few interim releases until something you need is included. The other benefit it would provide is allow me to move all the apps forward a little bit at a time, rather than doing continuous development on one app for weeks at a stretch before rotating development to the others.

Well, it looks like the latest toolbar fix has finally stuck. There were actually a few, very subtle interrelated items, and some procedural issues that cascaded into others. Code was shifted around hither and yon, resulting in elimination of two of a main class’ instance variables and simplification of logic in several methods.

Speaking of which, I’d really love to try out Xcode3’s new refactoring tools, but that would mean

1. spending more time in Leopard, which freezes on me,
2. and spending more time in Xcode3, whose text editing I already loathe.

I will need to investigate how well refactoring works in TextMate (which I already own and use from time to time when bumping against some other Xcode2 limitation.)

The pressure cooker development level of the past couple of weeks really put the development process here through the wringer. Some things held up. Some things fell apart. So more ‘behind the scenes’ development is going to take place here to minimize the interference caused by the mismatch between what needs to be done and what the tools require me to do next.

Some observations of the release’s development:
1. The primary, agile-based, processes were abandoned in the panic over the continued toolbar problems and Leopard incompatibilities.
   There was no established process for handling emergencies, so the chaotic edit-compile-test behavior resurfaced. This is not to be repeated.

   Corrective Measures: A plan of action for dealing with emergencies must be established. Exercises and drills prepared and performed so the proper outcome occurs next time.

2. Users seemed to be unaware, or unconvinced, of my plans for Leopard.
   Although I had made statements regarding the planned support for Leopard, it was only in response to questioning by users. I had failed to provide information ahead of time and prominently.

   Corrective Measures: While users refer to the forum when there are questions or they have some issue to resolve, they refer to the blog constantly. It’s best to have already disclosed plans so users have time to assimilate needed info and prepare accordingly. Blog. Blog. Blog. Forum posting: link to blog. Then blog.

3. Unit testing got skipped.
   It was unavoidable given the current process because tests didn’t cover the critical issue being developed: the user interface (i.e., toolbar items and empty windows).

   Corrective Measures: Mock objects are inadequate to sufficiently test the UI. For all my blustering that the UI is testable, it’s clearly time I seek or develop the necessary tools and put them to use.

4. Subversion is a win, but it’s an ugly win.
   Being able to restore files, or the project, of a particular beta or release build, or of a particular date and time, is great. Being able to make wholesale changes to the project, then abandoning them, or keeping them along a separate branch to continue experiments at a later date without juggling project directories here and there, is great. Being able to merge or contrast multiple working project directories from separate environments (Tiger, Leopard, laptop, and the v1.6.3 release) quickly and easily, is great.

   Nibs saved as a smattering of files in the repository: not so great. Confusing subversion with its own metadata when copying/adding directories: not so great. Performing an add/delete when moving or copying directories and files instead of adding “move” or “copy” semantics to the system: not so great. Poor integration mechanism for multiple offline revisions: not so great.

   SCM is great. I’ve used CVS for years. I’ve even set up another project or two using Subversion before I bought Mori and Clockwork from Jesse. But I don’t see where it’s an obviously better package than CVS, but perhaps that’s because I’ve learned to work around CVS’ shortcomings. (Reviewing the feature list at http://subversion.tigris.org, the only practical feature I see that means anything to someone actually using Subversion is command-level manipulation of directories, although the handling of renames is poor. Hrmm. And svn+ssh access to the repository, with Xcode integration even!)

   Corrective Measures: For the time being, the messiness of the metadata in copies and moves will have to remain unsettled. As long as the structure ends up correct, and it doesn’t take long to get it to that state, it remains tolerable in the face of bigger issues. A procedure must be established to handle the circumstance where developers are offline and must “commit” in some manner which is transferrable to the repository when they are back online.

5. Debugging is severely inadequate for professional-grade development.
   Can you tell Apple’s team has a severe case of he-man, mouse-haters club insecurities? (Either that, or they’re operating in crunch mode so much, they don’t have time to develop the appropriate tools. Nah!) The debugging facilities they provide for developers operate primarily through the use of environment variables, console output and functions and output which require gdb to access.

   ZeroLink didn’t work well and was abandoned; Fix and Continue is still problematic; and the vaunted debug libraries (to help you catch errors in the parameters passed to the AppKit and Foundation libraries) hasn’t worked right since 10.4.3.

   My own debugging facilities are rudimentary and lacking in depth. More of the failures in the field should be communicated back to me (remember Safari’s ‘bug’ button?). The crash reporting mechanism should work when the crash occurs, not the next time Mori runs. Also, exceptions are logged to the console, but otherwise go unnoticed by Mori and the user.

   Corrective Measures: Extend the runtime monitoring and browsing tools. Rewrite the crash reporting mechanism to activate when the application terminates. Add an exception handler which sends reports back. Develop proper high-level debugging tools for Objective-C, the UI, CoreData and Bindings. Coding takes place at a higher level. Debugging should be at least at that same level. -fobjc-gc exists for a reason. Take advantage of it!

6. The build process is inconsistent, confused and unstable.
   The various plugins’ build settings aren’t consistent. Extraneous resources (images, sounds, etc.) are stored in the nibs. At times the build directory must be purged for a functioning executable to be built.

   Corrective Measures: A Build Settings Table has already been prepared and Mori and its plugins have had their settings documented. The settings for the Blocks plugins has yet to be documented. The effect of some settings has to be determined, which can then be propagated to the targets as appropriate. The project file should be purged of duplicated actions, unnecessary references, etc.

7. Debugging Mori when it’s used for normal work results in too much human activity thrashing.
   Because the debug and test versions use the same preferences/file settings, the release version used for normal work had to be exited to avert data corruption in the notebooks.

   Corrective Measures: This issue was resolved with the Oneill branch. However, that uses a separate target to achieve its distinction. Some means of specifying a special bundle id for the debug and test builds must be developed to accomplish a similar effect, perhaps through preprocessing the Info.plist.

8. Checklists are great
   Being able to state that processes are being followed, builds are complete, and updates were released correctly, is great.

   Corrective Measures: Checklists are great, but scripted procedures are better. Automate as much of every process as possible.

9. To-Do lists, Getting Things Done (GTD), or whatever Time Management activity that is put into practice definitely helps.
   I’ve got the audio book. Mori’s got the plugin. I’ve got Taskpaper, too. I’ve got a Handspring Visor Edge and its Palm Desktop software. Something, anything, that helps track tasks that need to be done so nothing falls between the cracks is a plus. They are effective at keeping things moving forward, but I’m not efficient at it and a lot of discipline and effort must be used to keep moving things forward.
   Corrective Measure: I used TaskPaper to handle the tracking during this hectic period. I’ve got a blog entry in preparation, but basically, I found it a great way to get into the GTD system due to its simple interface. I must continue developing my understanding of this system to manage my activities, and see about getting the various software/devices integrated better.

Next Batch of Changes

I’ve already begun work on v1.6.8: Improved checking and repair functionality for notebooks. Correct Italian localization, thanks to Mario Pettenghi. The code for the Blocks framework will be tweaked so it compiles without triggering warnings (e.g., unused parameters, missing prototype, etc.). Additional unit testing for the UI, and refactoring of UI code.

These improvements to the code will set up the continuation of progress for v1.7, which should then be ready during the holidays. At least that’s the current goal.

It looks like the showstoppers which were part of 1.6.4, 1.6.5 (and even 1.6.3 counting the toolbar) have been dealt with. The latest build even seems to function normally in Leopard.

Thus, now that Leopard 10.5.1 has been released, and my Leopard install was for testing purposes anyway and not as my primary development environment, I’m going to install it and test the 1.6.6 build against it as well to make sure it still works. That is, after a stopover in Tigerland just to make sure that nothing in Leopard loused up my main volume.

The problems in Leopard appear to result, not from changes in the architecture of the Cocoa classes, but in how stringent the standards for values passed to them are, and how they deal with values which are unacceptable (invalid parameters and exception handling). Sure, code should only pass correct data all the time, but sometimes our expectations are off. Sometimes we get incorrect data ourselves (Garbage In Garbage Out), and sometimes, bad things happen in the real world in which computers operate.

Tiger used to be somewhat more non-chalant about this issues. It would ignore all but the most egregious problems, unless the programmer or the user asked otherwise. Leopard seems to be more restrictive and demanding of Mac developers and the code they write. Again, not bad by any means, except for the unexpected and the change in behavior for things that used to work before.

So, with more testing and better debugging (so why can’t I get “debug” suffix to work?!), we’ll hopefully see this occur less often in Mori’s code.

Now…back to that checklist.

Ever since I decided to treat my blog more like Twitter, and just write micro-events rather than an entire epistle, writing either has come to a virtual standstill. (Except of course for the firestorm that has been Mori v1.6.4, v.1.6.5, and v.1.6.6 which is now undergoing 3rd party testing and I’m still trying to squash that “freezes while writing in Leopard” bug.)

Option-clicking the ‘Run’ icon in Xcode3 causes Mori to execute, then gdb starts up and attaches to Mori’s process, then Mori quits. Huh?

As if that weren’t enough, everytime gdb starts up, it spews out a lot of warnings about object files it can’t find. Like so,

warning: Could not find object file “/BinaryCache/Libsystem/Libsystem-111~176/Root/usr/local/lib/system/libc_debug.a(errno.o)” - no debug information available for “/SourceCache/Libc/Libc-498/sys/errno.c”.

warning: Could not find object file “/usr/local/lib/system/libcommonCrypto_debug.a(md2_dgst.o)” - no debug information available for “/SourceCache/CommonCrypto/CommonCrypto-32207/Source/Digest/md2_dgst.c”.

warning: Could not find object file “/usr/local/lib/system/libcommonCrypto_debug.a(md4_dgst.o)” - no debug information available for “/SourceCache/CommonCrypto/CommonCrypto-32207/Source/Digest/md4_dgst.c”.

warning: Could not find object file “/usr/local/lib/system/libcommonCrypto_debug.a(md5_dgst.o)” - no debug information available for “/SourceCache/CommonCrypto/CommonCrypto-32207/Source/Digest/md5_dgst.c”.

warning: Could not find object file “/usr/local/lib/system/libinfo_debug.a(gethnamaddr.o)” - no debug information available for “gethnamaddr.c”.

warning: Could not find object file “/var/tmp/Libm/Libm-287.1~6/Libm.build/Libm_debug.a.build/Objects-normal/ppc/scalb.o” - no debug information available for “/SourceCache/Libm/Libm-287.1/Source/PowerPC/scalb.c”.

What kind of railroad are we running here?

Anyway, at this point I’m planning on changing the file format after v1.7 ships. It’s just making it too tough to do some fixes. Mori still won’t require Leopard for some time yet, but I have to make my job, and putting out updates, somewhat simpler.

Even after releasing two updates to the same app in as many days, there are still unresolved, critical issues that have to be corrected. I’m attempting to get the toolbar items and empty windows bugs fixed in Tiger, and solve some of the more blatant of the Leopard issues.

Speaking of which, I hate Leopard. It froze while I was away from my machine. Don’t just put lipstick on a pig and tell me it’s a healthier beast. Get a healthier beast.

Stacks? Pretty. (At least the grid layout. The arc toss is a hurler.) I can’t navigate through nested folders with it though. Less functional. Would I rather have prettier than less functional? Definitely not in this case.

So I rebooted into Tiger and answered some emails. I’m going to see if Thunderbird (yes, I don’t use Mail.app for real email) will allow me to link to its database in the Library (~/Library/Thunderbird) or whether it’s yet another example of me wanting to be so unconventional that I can’t get tools to do what I want.

Then I’ll head back into Leopard and add some more unit tests and debugging and hopefully get a stable update into users’ hands by morning. I’m hoping the debug suffix works better for me in Leopard than Tiger’s did.

So it turns out the announcements were not as spectacular as we had hoped for. A lot of the keynote was in fact a repeat of last year’s. What was new was the disclosure that EA and id were developing new games for the Mac, Safari was going to be available on the Windows platform, and that XHTML/AJAX was the API for the iPhone.

Very underwhelming. Very un-spectacular. And very significant.

Gaming for Mac gives less cause for users to run Windows on Mac hardware.

Safari for Windows gives more reason for web developers to support the lowly Mac user, who could otherwise be ignored.

And XHTML/AJAX, or Web2.0, means that the iPhone has no significant programming hurdle for users. You could write up a simple iPhone app using Safari on your Mac or PC, and download it to your iPhone when it’s ready. You could even tweak other apps to your liking. Perhaps Apple will be motivated to release DashCode for Windows as well. But it just goes to show that scripting has already won.

It will also inhibit the adoption of Microsoft’s PopFly!, Silverlight, Adobe’s AIR, and other proprietary “solutions” to ubiquitous, networked apps.

It also means the iPhone has no significant programming differentiator from any other platform. Thus, whatever apps you write for the iPhone will operate with minor modification on the Nokia N90, which also has an embedded WebKit.

And, finally, it means my plans are not only safe, but will carry more weight than I thought.