What is opa-dynamic ?
opa-dynamic provides a project based 'verify & launch loop'. This make developpement with Opa even more fun and more productive.
Any time you do a modification on your project, your project is verified by Opa compiler (syntax, semantics, client/server distribution ...) and launched. opa-dynamic is editor independant so it will work even in most environment.
Is my project supported ?
It should work off-the-shelf with project created by opa-create or containing an
opa.conf or a
It can be easily customized to work with most projects.
How to use it ?
Assuming your project is compatible with opa-dynamic, in a terminal, start opa-dynamic:
opa-dynamic --src-dir path/opa_project
You will be notifed of compilation error if any. On the terminal you should have a message:
Change detected: compilation OK, run OK
And you should have in your notification area the following message:
Launched : opa_project
Edit any opa file inside, like the code for your project home page page.
The previous two message appears again, indicating that the modification has been processed.
You can see the result immediatly using your browser. (
Edit again, when the message Launched appears, you can reload the home page and see the results of your modifications.
If your edit breaks the compilation or the launch, we will be notified. For instance, if you introduce a type error, we will have the following notification:
FAILURE : opa_project
Error: File "src/view/page.opa", line 1, characters 3-7, (1:3-1:7 | 3-7)
The types of the first argument and the second argument
of function + of stdlib.core should be the same
You can correct the error and continue to work on your project, at any time the project is correct again, the last version will be launched and testable in your browser.
Is my Makefile supported ?
make build your project and
make run launch or relaunch your project, then yes it is supported.
My Makefile is not supported, what should I do ?
make target1 is compiling your project, generating
You can do:
opa-dynamic --src-dir path/opa_project --command "make target1.exe" --command "killall target1 && target1.exe"
See "How to use with project with custom build rules?" for explanations.
How to use with project with custom build rules ?
You can give the list of command to build and launch your project.
Be sure that relaunching is supported by terminating a previously launched version.
The last command is assumed to be the launch command and its termination is not waited for. (if not use
opa-dynamic --src-dir path/opa_project --command "build_command" --command "killall launch.exe" --comand "launch.exe"
How to use specific opa options without specifying --command in details ?
You can use
For instance if your project is in classic syntax:
opa-dynamic --src-dir path/opa_project --opa-opt "--parser classic"
How to avoid the
--src-dir option ?
The current directory will be use if
--src-dir is omitted.
Are Mac and Windows supported ?
opa-dynamic should work but the notification feature is not working.
Can notification appeared in my favorite text editor ?
We plan to support notification in emacs and Sublime Text, and to provide a simple way to have it on other editor.
Can I make opa-dynamic better ?
Yes you are welcomed for any contributions, bug fixes, doc fixes and new features.