15 June 2011

Of Fish, Shell-Fish and Fish Py

FluidDB is dead; long live Fluidinfo.

Whither fdb?

Obviously, fdb should become fi; it’s perfect. Thirty-three-and-a-third per cent shorter is 33⅓% better for a command-line command. And fi is just so beautiful. It could almost become a ligature: how perfect would fi be?

Except, of course, there’s one tiny problem. In Unix shells, fi is reserved as the closing counterpart to if. Even if I could make fi kinda, sorta work, I wouldn’t want to. The closing counterpart to if should be fi; it’s part of the cosmic order.

So what to do? The procrastinator’s dictum to the rescue:

Why put off till tomorrow that which doesn’t really need to be done until the day after that?

Why does fdb need to change at all? It could be a throwback, a reminder of glories past, a piece of Fluidinfo’s cultural legacy (along with the fluiddb superuser).

That’s what I thought.

Until I decided to put fdb into the sky. I’ve long thought it would be cool to have a browser-based version of fdb that anyone could simply use without installation. “No software”, as Salesforce.com likes to say.

For better or for worse, I tend to use Google’s App Engine to write web apps at the moment, so I went to register a new app there.

In Search of a Google App Engine App Name

Unfortunately, registering a new app is a bit like picking a domain; most of the desirable onare are gone already, not helped by the fact that all google usernames are considered taken. Add to that a minimum-of-six-characters requirement, and fdb looks to be in trouble.

As I was doing all this, I was chatting online with Terry (@terrycojones), who is the leading advocate of taking the DB out of FluidDB, and who, while entirely willing for me to plough my own furrow, had a very clear preference for expunging the db from fdb too.

Clearly, in reality, fdb is a shell for Fluidinfo. Unix has a long history of shells. In roughly chronological order I have used sh (the original “Bourne” shell), csh (the C shell), tcsh, ssh (Simon’s shell; not the Secure Shell; though I use that daily too), and now, always, nearly exclusively, bash, the truly wonderful Bourne-Again Shell. I’ve also dabbled with ksh, zsh and no doubt various others that fall into the large things-I-used-to-know category.

So give this, what would you call a shell for Fluidinfo? It just has to be fish. It’s screaming out to be fish. The only problem is that it’s thirty-three per cent worse (33% more typing).

Well, the fact that it’s 33% worse and a bit fishy.

Well, the fact that it’s 33% worse and a bit fishy and isn’t actually long enough to be a Google App Engine ID. (Too long and yet too short; not long enough and yet altogether too long. Such a paradox.)

FDB’s Fate Sealed by a Typo

As I was checking availability on App ID after App ID, I eventually got to shell-fish. Now shell-fish is just silly. I mean, it’s redundant (shell-Fluidinfo shell?). It’s hyphenated. It’s even fishier than fish. It sounds like a drunken version of selfish. Clearly, no person in his right mind was never going to choose shell-fish.

But then, instead of clicking the “Check Availability Button”, I typed return. And discovered that shell-fish was available. And that I had registered it.

Now, give me some credit. I do appreciate that this wasn’t really it. I could have changed it. But it could have been worse. I checked availability of fishnet (taken) and fish-net (available) and countless dozens I’ve have to go back to the IRC logs to recall so memorable were they. But in the end, I wasn’t convinced that I was gong to do better than shell-fish. And it does lock in fish, which is the perfect name for the Fluidinfo Shell—well, except for being 33% worse, and fishy, and not available as a Google App Engine ID, and . . .


So there it is. If you wish to be a guinea pig, head on over to http://shell-fish.appspot.com, where you can try fish online. It’s mostly the same as fdb was, and fish is, except that

  • you don’t need to prefix commands with fdb (or fish), obviously.
  • you are subject to the Google App Engine, 5–10 second maximum for an HTTP request. This can be an issue; timeouts are not uncommon, especially for complex queries, and when Fluidinfo is under load.

It’s almost certainly buggy and subject to change.

Right now, if you don’t log in, you will use the Fluidinfo test user. Before too long (when registrations are fixed), it’ll be a different user. But you can log in using your own Fluidinfo credentials if you like.

The way you do that is that you log into the appliction using a Google Account. (My app doesn’t get to see your Google password.)

Then, if you go into settings, you can add one or more Fluidinfo accounts by specifying your username and password. (You can also choose whether to use the default, Fluidinfo-style full paths for all tags and namespaces (njr/rating etc.) or whether your own tags and namespaces will be abbreviated to rating etc., at the cost of having to use a leading / for other people’s (/ntoll/rating etc.).


If you register a Fluidinfo username and password, shell-fish will store these in Google’s data store. I’m not particularly comfortable either with asking people for their passwords or with storing them, but I don’t think there’s much alternative at the moment. (There may be in an OAuth future.)

Obviously, before you hand over your password, you need to consider a few things:

  • Do you trust me? I could steal your password.
  • Do you trust fish? Even if you think me worthy of your trust, do you consider me competent? [Disclosure: sometimes, I make mistakes. See the discussion above on how shell-fish got its name.]
  • Are you happy with your password living in Google’s data store?

On the last point, I have taken what might be called minimal precautions. I do not store your password in plain text, partly so that should anyone happen to gain access to Google’s data store, they won’t just be able to read your password, and even more so that if I browse the shell-fish Google data store, I won’t inadvertantly see your password. (I’d have to decide to be evil.)

But I should also admit that what I’ve done to the password, while presumably technically qualifying as encryption, would probably be more accurately termed obfuscation. Let’s put it this way: it’s better than ROT-13, but it’s not as strong as PGP.

The other thing to know is that when you remove a user from your shell-fish settings, I simply the datastore (well, shell-fish tells the data store) to delete the record. I certainly don’t have access to it after that; whether a DrEvil@google.com could recover it, I know not.

Of Fish, Shell-Fish and Fish Py

So there it is.

I am in the process of changing the name of fdb to fish. (In fact, I’ve done it locally, but I don’t plan to push it to Github for a few days.)

The web app shell-fish is available at http://shell-fish.appspot.com for brave early adopters. I’m fiddling with it all the time. It will change a lot (most importantly, I hope it will end up looking more like a scrolling terminal than a one-shot search engine—think Goosh rather than Google. But right now, it’s very Google.

As fdb becomes fish, so will fdb.py become fish.py (geddit?).

One more thing . . . Amazon Product Pages

I’ll blog about this separately, but even if you don’t want to use fish per se, you might be interested in one neat little experimental feature.

At the top of the page in shell-fish, there’s a link called az-fish (though it might become amazon-fish). This is bookmarklet. Don’t click on it on the page; rather drag it to your tool bar. (It works even if you don’t give fish details of your Fluidinfo account.)

Then, click it when you are on an Amazon product page for a book, an eBook, a CD or an MP3 track. (I’ve only tested it on Amazon UK and Amazon US; it will probably need to tweaked for others, especially for non-English others.) It will take the URL and give it to fish (at shell-fish), which will attempt to figure out the about tag for the corresponding book, album or track in Fludiinfo, using its new amazon command (which may eventually become a thing command.)

How cool is that?

1 comment:

  1. Anonymous17/6/11 07:21

    lol Amanda. That could be a good thing. I had a spider shoved in my face today while I was eating my breakfast. -Yanagigawa sunglasses sale