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I'm new to Nix and quite excited about it (I've been using it so far for Haskell).
I'm planning to use it to deploy Php applications. However, how Nix deals with
Php packages (installed normally or with pear).
Working with PHP webapps generally requires several running services (php-fpm, httpd, mysqld, redis, etc). The answer depends on how you manage the services -- which, in turn, depends on whether you use:
(a) The full NixOS: NixOS provides a service-management layer - you edit a config file, twiddle some flags, and turn on the services. I haven't done this myself, and I think it needs a more pointed tutorial for folks coming from a PHP webdev background, but the system does exist.
(b) The crossplatform nix/nixpkgs: There does not appear to be a canonical service-management option here. nix basically just gives some binaries (php-fpm, mysqld, etc) which you can launch yourself. It's somewhat daunting for typical PHP developer.
Full disclosure: To try to improve the situation for crossplatform nix+PHP, I've written an example project locolamp. It won't help much with learning NixOS, but it may help get your toes wet with nix+php in cross-platform usage. See:
https://github.com/totten/locolamp
After spending a week trying to configure a LAMP platform and giving up (mainly because I couldn't make PHP send emails), I concluded that Nix is not ready for developping easily PHP application in production.
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One of web tools we intend to use requires docker for installation. Due to limitation in resources, however, the only way for us to deploy this tool is on a shared university php webserver with an associated MySQL database. My question is, can you somehow convert or even "compile" this docker-dependent tool to get some simple package, similar, for instance, to Wordpress? Indeed, as per my understanding, Wordpress development does require docker, while the final package for Wordpress installation does not.
Is this operation of docker-removal possible and is there a standardised workflow? The tool in question is located in the following repository.
I have tried to install the tool as is, being blocked by the lack of admin privileges and the absence of docker on the described university webserver. I have experience in setting up Wordpress, I would expect for my tool of interest to have a more sophisticated installation process (compared to the current 3 steps) without docker and, for instance, to also require manual connection to an SQL-database.
Please excuse me for my limited understanding and layman terms, I am sadly not coming from a computer science background.
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I wanted to get a bit of advice from the StackOverflow community on best practices/guidelines when inheriting a Rails app from another developer.
I am currently in the process of assuming control of development at my place of work. I have decent experience in front-end, SQL/Mongo, and Node.js, and a good amount of knowledge of Ruby. However, I do not have very much experience with Rails, per se.
The previous developer is being fairly unhelpful in providing dependencies and software versions of the various packages in use by the app. However, I have been able to get the following information and I have installed these dependencies (although they may differ from the versions needed by the app):
Postgres
Heroku CLI
AWS CLI
Redis
Sidekiq
AngularJS
Would any of you guys be able to briefly delineate the next steps of getting a previously existing app running (or point me to another source)?
Any help you all can provide is much appreciated. Thank you!
Things you need to retain:
Access credentials to all production servers and used services (including domain name and backup servers if there are any). It is not obligatory to be you, but someone at the company should have them (there may be some security/privacy related issues).
Access to source code
A fresh production backup (if possible)
Most of versions can be inferred from production system once you have full access.
Some others (like sidekiq etc) are in Gemfile.lock and yarn.lock files.
Then try to bring the system up from the backup - if you succeed - you'll be sure that everything is ok
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I wish to use threads and concurrency features of Go language in my Ruby on Rails project. I have several alternatives, one of them is jRuby. But, I don't like Java (personal preference). I have heard that Go Lang is a perfect replacement for Java. Its even more faster & secure than Java. I saw people comparing its speed to C++ as some of its part is in Assembly itself. People can even write a complete web server like Apache from scratch in Go.
What I am really planning for is: All the low level stuff in Go and rest of it Ruby on Rails. I still want to have the ease of development that RoR has to offer.
Starting in Go 1.5, there is a build mode called c-shared, which allows you to build C shared libraries in Go. These can then be loaded into Ruby using FFI and used in your Rails app. See this brief introduction to the concept.
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Ok, this sounds like a bit of a rant, but I was wondering if there was a technical reason that Erlang doesn't have a proper package management system by default.
No major technical reason really. Just different needs as the classic way of setting up and installing erlang software is though applications. And some use releases added to that.
Often you see erlang software distributed completely self reliant. That is that it contains all the libraries and the virtual machine together in a package and not needing any sorts of external dependencies. You even see this in development versions of packages. The source tree of the Riak database for example has all dependent libraries in it.
This is not a bad idea like many coming from Ruby(like me) may think. This way each application is self reliant. As one of Erlang's main goals is to be the most reliable thing available it makes every sense in the world that each application can have it's own version of the library. Thus making sure one app does not make the other unstable.
Try rebar; it's a build system for erlang that includes a dependency management system. It doesn't have a central repository like gem does with rubygems.org, so you have to specify git urls. But, it does save you the trouble of having to download nested deps; it takes care of that itself.
And it sticks with Erlang's philosophy by keeping the downloaded deps inside your project directory rather then in a central system location; this is similar to bundler's deploy mode.
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What issues or gotchas will I run into if I develop web applications in Lua; is there anything I should be aware of before starting?
Any experience with developing Lua web applications?
The web application framework based on Lua that gets a lot of discussion in the Lua community is the Kepler project. The Kepler team provides integration with web servers (especially Apache), a web server of their own, useful modules, and a working MVC application framework called Orbit.
Several other projects work with or on top of Kepler's foundation. A prominent one that demonstrates that Kepler can be used for real work is Sputnik, a very flexible and extensible CMS that functions as a Wiki out of the box but which can be extended to do many other things.
Speaking from personal experience, I built a control interface for an embedded system using Kepler's Lua Pages to render and process the forms and reports without much hassle as only my second or third real Lua project. That system is still in use and I would do it again.
take a look at http://openresty.com/ (nginx and lua/luajit, async)
Go ahead and give it a shot! Lua is a very nice language.
Another MVC framework based on Lua is also Luci.
Interesting concept. I think one of the things you need to consider is which webserver do you plan to use? I think the webserver support for Lua would be flaky at best, no offense to anyone involved but its just not a common web platform.
With that said, however, the Lua Libraries And Bindings lists quite a few components that you could seemingly leverage for your efforts. I looked the list over and all things common to the web are there: databases, regex, network, zip, crypto, xml, images, etc. There's even a couple of web frameworks, so perhaps this is less rare than I thought?