How to automatically reload Clojure code? - dynamic

How to automatically reload Clojure code?
I have watched the presentation. And in there they use some hot swap Clojure technology that reloads code whenever changes are made into source files. I can run the code, but I can not observe the effect of auto reload. How is it possible to reload the code?
the source code.

There are many ways to reload code, depending on the situation:
Emacs/CIDER shortcuts to reload a file. Probably Rich is doing something similar. Also see this: How to reload a clojure file in REPL
watch files and reload the code (figwheel for frontend development does that, test plugins as well as CIDER shortcuts specifically for running tests, boot has a watch task...)
a middleware for the web server you use (ring for example has ring.middleware.reload/wrap-reload for this, pedestal comes with one as well, other webservers like yada play well with component)
a component workflow works also, there is an example of an auto-reloadable system with holy-grail

(I didn't fully re-watch this video, but these notes are from my observations after skipping through the video and making educated guesses)
From what I re-watched of this video it looks like Rich is evaluating the code in a running repl. This allows him to change the code, evaluate it, and see different behavior.
Many editors have support for evaluating code in a buffer in a Clojure repl. Here is some documentation on using CIDER with Emacs to get to interactively play with your code.
Unrelated to the video in question, if you are using ring for web development. You can use the wrap-reload middleware to have your code automatically reloaded when a file has changed and a request hits your web app. This is extremely useful when developing a Clojure web application.
For automatically reloading and running your clojure.tests I recommend lein-test-refresh. It is a Leiningen plug-in that monitors your project for file changes and when something changes it reloads and runs your tests. If you have tests for your project this greatly speeds up development.

Use mount to manage the starting and stopping of your components. For example in a backend web app, you'll want to startup the db before you start the webserver probably.
Then in emacs you can have:
(defun cider-repl-refresh ()
(interactive)
(save-some-buffers)
(with-current-buffer (cider-current-repl-buffer)
(goto-char (point-max))
(insert (concat "(require 'clojure.tools.namespace.repl) "
"(clojure.tools.namespace.repl/refresh)"))
(cider-repl-return)))

If you are not super fond of Emacs (I love Emacs, but hey not everybody does) LightTable is a very nice option for Clojure/ClojureScript interactive programming too.
For developing ClojureScript (Clojure that compiles to Javascript) LightTable and Figwheel are a really nice pair.
In my opinion LightTable has some advantages against Emacs (I never got cider to work perfectly with ClojureScript) for the webdev side, LightTable is basically a specialized version of Chrome, because it is built on top of Electron.
Check this documentation on the Figwheel GitHub page: Running Figwheel with LightTable:

If you are using Cursive IDE in IntelliJ, there is a special REPL tool which you have to setup to get the functionality you are looking for. It has many features vs. "lein repl" in a terminal window.
Full tutorial here: https://cursive-ide.com/userguide/repl.html
However, its very easy to setup a default instance:
Right click project.clj/deps.edn -> "Create Repl for...". Default settings are fine. Hit ok/apply.
Right click project.clj/deps.edn -> "Run Repl for..." (a repl window will open)
See Tools->Repl for a list of commands, such as:
switch to repl window: Ctrl+\
reload current file in repl: Alt + Shift + L
send function defn to repl: Alt + Shift + M
... and more
In addition you'll get full code completion, syntax highlighting, etc. when writing in a REPL.

Related

Using MXUnit or is there another way to display coldfusion output using Intellij IDEA 15

I'm loving IntelliJ because I also work with MySQL and the integration into one UI is great. Seems that IntelliJ works nicely with ColdFusion as well. I'm just hoping to successfully use MXUnit, but I seem to be getting an error upon testing. My main goal is just being able to display the output directly in IntelliJ instead of outputting in a browser.
My test site path: /Applications/ColdFusion11/cfusion/wwwroot/Test/test.cfc
Error http://localhost/mxunit-launcher.cfc?method=executeTestCase&componentName=test
Seems like I have to add in a mapping, maybe in CF Admin, because the path and web path don't match but I haven't done that before if that's the case. Here's a screenshot of input in IntelliJ, and the output at the bottom of the screenshot when running the debugger:
Thanks for any feedback on what I might be missing.

Can Webstorm play nice with Chai language chains?

I am using Mocha+Chai for a current Node.js project. My IDE is Webstorm 11.
Unfortunately, it seems Webstorm has no way of figuring out how language chains in Chai's should/expect are supposed to work. The following is commonplace:
I have tried explicitly setting both Chai and Chai-DefinetlyTyped as libraries for my project via Settings->Javascript->Libraries, but this does not resolve anything.
For the sake of tool support, I have considered dropping expect/should for assert instead, as this works perfectly. However, I very much prefer the style of expect/should, so it would be amazing to see a solution to this.
Problem is caused by weird dynamic way these chains are defined. As a workaround I can suggest using chai.d.ts:
Open "Settings | Languages & Frameworks | JavaScript | Libraries"
Click "Download..." button and select "TypeScript community stubs"
Find "chai" and click "Download and Install".

Objective C - "Reset Content and Settings" programmatically in test files

I am playing around with the new UI testing introduced in Xcode 7 beta. In one of my UI testing scenarios, I need to add some code that does the same thing as clicking Simulator -> Reset Content and Settings in the setup() of my test file, which is a XCTestCase. Can the reset be done programmatically? Or, can we mimic the effect of a factory reset on an app in test code?
Not entirely programmatically, but you can always write a bash file to delete:
${user.home}/Library/Application Support/iPhone Simulator/${simulator.version}
That will clear the settings on the simulator.
My understanding is that you won't be able to that from within your app, as apps are sandboxed.
Usually people were using shell scripts or apple scripts. However, using hard reset is absolutely not necessary.
You shouldn't care about data in other apps, you should care only about the data in your app. You can always delete your app data (files, user defaults) in the beginning of your tests. So, why should you do a hard reset?
A better solution is mocking. If your test supposes that, for example, some variable in NSUserDefaults is not set, you don't have to care about the actual value stored there, just mock the method your implementation is using (e.g. objectForKey: and let it return nil.

TODO tasks list in Flash Builder

Does Flash Builder support tasks list?
I'm testing Flash Builder for PHP, and I can see my // TODO in PHP code but not in AS or MXML.
I found this plugin:
http://www.richinternet.de/blog/index.cfm?entry=911D4B57-0F0D-5A73-AF6F4D4D04099757
but it's very old.
Do you know how can I see my TODO list in AS3 and MXML code with Flash Builder 4.5?
[UPDATE]:
I've installed the plugin from richinternet.de and it works in Flash Builder 4.5 for PHP.
But it's very poor, it only detects the TODOs and FIXMEs if you open the file, it doesn't search all your src for TODOs and FIXMEs.
And also is case insensitive, that's a problem for me, because in spanish "todo" means "everything", so I can't use the word todo in my comments now.
I can't understand how Adobe doesn't include a plugin for this after so many years developing Flash Builder !! they are adding TODO comments when you generate a handler, method, etc !!! I don't know how that can be useful if you don't show it in the tasks!
Get the TODO/FIXME extension for Flash Builder at the following link, and give it a try.
http://www.richinternet.de/blog/index.cfm?entry=911D4B57-0F0D-5A73-AF6F4D4D04099757
Another link at: http://blog.winnemconsulting.com/2011/08/08/fbtoolkit-taskfixmetodo-plugin-for-flex-and-flashbuilder/
How it works: the plugin parses every MXML/AS file when opened and searches comments (both MXML and AS comments) for TODO and FIXME tokens (this search is case insensitive, so it also finds todo). The same action takes place after a file has been saved. If a token is found, a new Task gets generated with its message set to the comment and displayed in the Task View (To open Task View choose Window-->Other Views...-->Basic-->Tasks in Flex Builder 2 standalone and Window-->Show View-->Other-->Basic-->Tasks when running Flex Builder 2 as a plugin in Eclipse). Note: to really delete a Task you have to delete the comment - deleting a Task from the Task View does not kill the comment, so after you save the file the Task will reappear.
For completeness on this question:
I do agree with you on the fact that it is truely amazing and inconceivable that such features do not exist in Flash Builder by default.
There is another alternative, though it's not free (It does have a 30 day trial though)
It is called SourceMate http://www.elementriver.com/sourcemate
The product has loads of other cool features, be sure to check the feature list.
I commented above on the accepted answer, but I'll relist here...
This post is now seriously outdated :(. I would like to offer a different answer... We'll say starting with Flash Builder 4.6.
It's from a great article (from the Adobe Cats) about how to add Task Markers (and Bookmarks) to your Flash Builder Project Files.
You can always search in the solution for "TODO":) And in the results window, press F5 the next time you want to see TODOs.
Best solution is to install the plugins mentioned previously via the software install menu under Help > Install Software.
WARNING - Don't get the SourceMate plugin if you have FB 4.7 - it isn't supported and doesn't look like it will be soon. Check this page for updates: http://support.elementriver.com/discussions/sourcemate

How to Write OS X Finder plugin

I'm looking for a guide or sample code for writing Mac OS X Finder plugins? It would like to know how to do some simple actions:
adding image overlayers to icons
adding context menu items
listen to file changes
I found the following two resources:
Writing Contextual Menu Plugins for OS X: An outdated document from 2002 that uses the COM API targeting Mac OS X 8/9.
SCPlugin: Open-source SVN Mac application that includes a Finder plug-in.
I am tempted to review the SCPlugin code, but was hoping to find an easier sample to digest.
The Finder Icon Overlay example project represents a small and very basic but actually working example of the answer below.
https://github.com/lesnie/Finder-Icon-Overlay
I know this is so old, but some may be still interested in topic (?)
Here is what I have it done under Leopard (10.6). At first proper Finder's headers are needed. Use class-dump tool to get it. Then write your code as a SIMBL plugin (refer to documentation how to do it), swizzling some methods. For instance to draw something over icon in ListView, drawIconWithFrame: method of TIconAndTextCell method must be overriden.
Here's the code for method swizzling:
+ (void) Plugin_load
{
Method old, new;
Class self_class = [self class];
Class finder_class = [objc_getClass("TIconAndTextCell") class];
class_addMethod(finder_class, #selector(FT_drawIconWithFrame:),
class_getMethodImplementation(self_class, #selector(FT_drawIconWithFrame:)),"v#:{CGRect={CGPoint=dd}{CGSize=dd}}");
old = class_getInstanceMethod(finder_class, #selector(drawIconWithFrame:));
new = class_getInstanceMethod(finder_class, #selector(FT_drawIconWithFrame:));
method_exchangeImplementations(old, new);
}
I am overriding "drawIconWithFrame:" method with my method "FT_drawIconWithFrame:". Below is sample implementation for this method.
- (void) FT_drawIconWithFrame:(struct CGRect)arg1
{
[self FT_drawIconWithFrame:arg1];
if ([self respondsToSelector:#selector(node)]) {
if ([[[[NSClassFromString(#"FINode") nodeWithFENode:[(TNodeIconAndNameCell *)self node]] fullPath] lastPathComponent] hasPrefix:#"A"])
[myPrettyIconOverlayImage drawInRect:NSMakeRect(arg1.origin.x, arg1.origin.y, arg1.size.height, arg1.size.height) fromRect:NSZeroRect operation:NSCompositeSourceOver fraction:1.0];
}
}
Essentially it draws "myPrettyIconOverlayImage" over every icon for file with filename starts with letter "A". This logic is up to you.
Pay attention to this line: [self FT_drawIconWithFrame:arg1]; this is how to call 'super' in order to get normal icon and name etc. I know, looks weird, like loop, but actually it isn't. Then wrap in into SIMBL plugin, install SIMBL and ...run.
Due to changes in Lion some work have to be done from scratch (make new "Finder.h" file with all declarations needed in it, find proper classess and methods to override), but this technique still works.
Happy hacking!
For Yosemite (MacOS 10.10 & newer), you can use Apple's FinderSync framework, which allows Finder extensions to:
Express interest in specific folder hierarchies
Provide "badges" to
indicate the status of items inside those hierarchies
Provide dynamic
menu items in Finder contextual menus, when the selected items (or
the window target) are in those hierarchies
Provide a Toolbar Item
that displays a menu with dynamic items (even if the selection is
unrelated)
Sadly, programming a Finder plugin actually does still require getting your hands dirty with COM. If you look at the SCFinderPlugin subproject of the SCPlugin project, you will find that it follows exactly the same techniques outlined in your first link, including setting up a vtable for COM, writing AddRef/ReleaseRef functions, and so on. Writing a plugin, where you're simultaneously managing old-school Carbon memory management, COM-style memory management, and Cocoa/new-style Carbon memory management, can be an incredible pain—and that totally ignores the fact that you'll be interacting in three or more radically different APIs, with different naming conventions and calling semantics. Calling the situation hysterically poor would be a vast understatement.
On the bright side, the Finder in Mac OS X 10.6 Snow Leopard has been fully rewritten in Cocoa--and with that come vastly superior plugin interfaces. If you are lucky enough to be in a situation where you can actually only target Snow Leopard, you probably should grab an ADC Premier or higher membership, download the prerelease builds, and code against that. Besides, your plugin may not work on 10.6 anyway without a Cocoa rewrite, so it might make good sense to take a look at Snow Leopard before it gets released, regardless.
There is no official or supported plugin system for the Finder. Starting with OS X 10.6, you will need to inject code into the Finder process and override objective C methods in the Finder process.
I've done this for a proprietary project. I can tell you that the reason that there are no examples or tutorials for this is because it is a significantly difficult and time consuming development task. For this reason, there's plenty of incentive for individuals or organizations who have accomplished this to guard the specifics of their process closely.
If there's any way at all that you can accomplish your goal using the Services API, do it. Writing a Finder plugin will take you 1-2 solid months of painstaking development and reasonably deep knowledge of C and Objective-C internals.
If you're still convinced that you want do to this, grab mach_star. Good luck.
As far as I know, there's no official plugin architecture for the Finder. You may be able to add image overlays to icons through an external application without having to hook into the Finder, although it wouldn't be on the fly. I don't think there is a way to add contextual menu items aside from Folder Actions and Automator. You can also look into writing an external application to monitor File System changes using the FSEvents API.
Here's a completed solution for Finder icon badges and contextual menus in Lion and Mountain Lion using the techniques described by Les Nie.
Liferay Nativity provides a scripting bundle that will swizzle the relevant Finder methods and a Java client for setting the icons and context menus. It also includes equivalent projects for Windows and Linux.
The project is open source under LGPL, so feel free to contribute any bug fixes or improvements!
The pickings are slim; it's never been really clear to me whether Finder Plugins are actually supported. A few more leads, though:
SampleCMPlugIn - Carbon-based of course, since so is Finder. Note that almost any Finder plugin is probably going to stop working with 10.6.
Automator can save things as a "Finder plugin." It's a more supported version of what you're discussing, but of course less flexible.
To add Finder/File browser icon overlays and context menus, in a cross-platform manner, from Java, take a look at the Liferay Nativity library.
I also make mention of this in another SO post, which also contains links to Apple's 'Finder Sync' docs and API.