KachkaevAssetsVersionBundle

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KachkaevAssetsVersionBundle

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Automates the process of updating assets version in Symfony2 & Symfony3 projects

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KachkaevAssetsVersionBundle
===========================

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## **⚠️ The repo is no longer maintained**<br/>See [its forks](https://github.com/kachkaev/KachkaevAssetsVersionBundle/network/members), e.g. [grizzlylab/KachkaevAssetsVersionBundle](https://github.com/grizzlylab/KachkaevAssetsVersionBundle)

Updating the assets version manually at each deploy is a real pain. This Symfony2 & Symfony3 bundle automates the process and thus makes your life a bit happier.

The bundle can read and write ``assets_version`` parameter in ``app/config/parameters.yml`` (or any other ``*.yml`` file) from the Symfony console. The original file formatting is carefully preserved, so you won’t lose your comments or empty lines between the groups of parameters, if there are any.

Imagine the configuration of your project looks the following way:  
   
``app/config/config.yml``
```yml
# Symfony >=2.7, >=3.0
framework:
    # ...
    assets:
        version: "%assets_version%"

# Symfony <=2.6
framework:
    # ...
    templating:      { engines: ['twig'], assets_version: "%assets_version%" }
    # ...
```
``app/config/parameters.yml``
```yml
parameters:
    # ...
    assets_version: v042
    # ...
```

You simply call ``bin/console assets-version:increment``, ``v042`` changes to ``v043`` and all your assets get a new URL: ``my_cosy_homepage.css?v042`` → ``my_cosy_homepage.css?v043``. More features are described below.

It is important to clear ``prod`` cache after updating the assets version for a change to take effect (just as with any other application parameter).

Versioning your project’s assets is a common good practice. More on the ``assets_version`` parameter can be found in the Symfony docs:  
http://symfony.com/doc/2.6/reference/configuration/framework.html#assets-version

Installation
------------

Run ```composer require kachkaev/assets-version-bundle```

Register the bundle in ``app/AppKernel.php``

```php
$bundles = array(
    // ...
    new Kachkaev\AssetsVersionBundle\KachkaevAssetsVersionBundle(),
    // ...
);
```
New to installing 3<sup>rd</sup> party bundles? Symfony docs will help:  
http://symfony.com/doc/current/cookbook/bundles/installation.html

Configuration
-------------

Here is the default configuration for the bundle:

```yml
kachkaev_assets_version:

# path to the file that contains the assets version parameter
    file_path:             '%kernel.root_dir%/config/parameters.yml'

# name of the parameter to work with
    parameter_name:        assets_version

# name of the class that reads and writes the assets version parameter
    manager:              Kachkaev\AssetsVersionBundle\AssetsVersionManager
```

You don’t need to add anything to ```app/config/config.yml``` for these values to apply.

### Option 1 (simple): Assets versioning is done on the server

If you are not using [AsseticBundle](https://symfony.com/doc/current/cookbook/assetic/index.html) for compressing your css and js files or if you call ```assetic:dump``` on the production server, you normally don’t want the changes of ```assets_version``` to show up in your git repository. All you have to do then is the following:

1. Modify your local copies of ```parameters.yml.dist``` and ```parameters.yml```:

```yml
 parameters:
     # ...
     assets_version: v000
 ```

2. Enable ```%assets_version%``` in ```app/config/config.yml``` (see the top of this file)

3. Commit and push local changes (this will also include a new line in ```app/AppKernel.php``` and edits in both ```composer.json``` and ```composer.lock```)

4. Go to the server, ```git pull``` and ```composer install```. Since you have a new entry in ```parameters.yml.dist```, you will be asked to confirm that you want to copy ```assets_version: v000``` to ```app/config/parameters.yml```. You do. Press enter.

5. All done! Now each time you want to update the version of the assets, call these commands on the server:
 ```sh
bin/console assets-version:increment --env=prod
bin/console cache:clear --env=prod
# bin/console assetic:dump --env=prod          # if you are using assetic
```

__Note:__ Replace ```bin/console``` with ```app/console``` if you haven’t switched to Symfony3 yet.

### Option 2 (recommended): Assets versioning is under the source control

If your app is running on multiple production servers or if you have a lot of css and js to compress with ```assetic:dump```, you will benefit from keeping compiled assets and their version in the project’s git repo.
It takes a bit more time to prepare for the deploy, but the rest happens nearly instantly.
You won’t need UglifyCSS, UglifyJS or other assetic filters on your hosting and will be able to switch to any stable project version in a moment.
A cheap server may struggle when compiling assets as this sometimes takes a lot of processor time, so you are saving yourself from that potential problem too.

Since ```app/config/parameters.yml``` is listed in ```.gitignore```, ```assets_version``` should be stored somewhere else.

1. Create ```app/config/assets_version.yml``` and link to it from ```app/config/config.yml```  
    
 ``app/config/assets_version.yml``
 ```yml
 parameters:
     assets_version: v000
 ```
 ``app/config/config.yml``
 ```yml
 imports:
     - { resource: assets_version.yml }
     # ...
 ```
 Do __not__ add ```app/config/assets_version.yml``` to ```.gitignore```!

2. Enable ```%assets_version%``` in ```app/config/config.yml``` (see the top of this file)

3. Add the following lines to ```app/config/config.yml```:
 ```yml
 kachkaev_assets_version:
     file_path:  "%kernel.root_dir%/config/assets_version.yml"
  ```
4. That’s it, you are ready to commit what you have! Now each time you want to update the assets on the server, follow this routine:  
    
 _on the local machine_
 ```sh
 bin/console assets-version:increment
 bin/console cache:clear --env=prod
 bin/console assetic:dump --env=prod
 git commit                                  # if you are doing this from a shell
 ```
 
 _on the production server(s)_
 ```sh
 bin/console cache:clear --env=prod
 git pull
 ```
 
 Make sure that the compiled assets are not in ```.gitignore```!

__Tip:__ Type less and do more by keeping common command sequences in shell scripts. Examples:  
   
 ``bin/refresh_prod`` _(to be used on the local machine)_
 ```sh
 #!/bin/sh

PROJECT_DIR=$( cd "$( dirname "$0" )" && pwd )/..

if [ "$1" = 'v' ];
 then
	$PROJECT_DIR/bin/console assets-version:increment --env=prod
 fi

$PROJECT_DIR/bin/console cache:clear --env=prod
 # rm $PROJECT_DIR/web/compiled_assets/*
 $PROJECT_DIR/bin/console assetic:dump --env=prod

cat $PROJECT_DIR/app/config/assets_version.yml
```
 ``bin/update_from_repo`` _(to be used on the server)_
 ```sh
 #!/bin/sh

PROJECT_DIR=$( cd "$( dirname "$0" )" && pwd )/..

cd $PROJECT_DIR & git pull
 cd $PROJECT_DIR & composer install --prefer-dist --optimize-autoloader
 rm -rf $PROJECT_DIR/app/cache/prod
 rm -rf $PROJECT_DIR/app/cache/dev
 $PROJECT_DIR/bin/console cache:clear --env=prod
 ```

Console commands
----------------

The bundle adds two commands to the symfony console: ``assets-version:increment`` and ``assets-version:set``.  
Usage examples:

```sh
# Increments assets version by 1 (e.g. was v1, became v2; was 0042, became 0043 - leading letters and zeros are kept)
bin/console assets-version:increment

# Increments assets version by 10 (e.g. was v1, became v11; was 0042, became 0052)
bin/console assets-version:increment 10

# Sets version to "1970-01-01_0000"
bin/console assets-version:set 1970-01-01_0000

# Sets version to "abcDEF-something_else" (no numeric part, so assets_version:increment will stop working)
bin/console assets-version:set abcDEF-something_else

# Decrements assets version by 10 (e.g. was 0052, became 0042; was lorem.ipsum.0.15, became lorem.ipsum.0.5)
# Note two dashes before the argument that prevent symfony from parsing -1 as an option name
bin/console assets-version:increment -- -10

# Decrementing version by a number bigger than current version results 0 (e.g. was v0010, became v0000)
bin/console assets-version:increment -- -1000
```

The value for assets version must consist only of letters, numbers and the following characters: ``.-_``. Incrementing only works when the current parameter value is integer or has a numeric ending.

Please don’t forget to clear cache by calling ``bin/console cache:clear --env=prod`` for changes to take effect in the production environment.

Capifony integration
--------------------

If you are using [Capifony](http://capifony.org) you can automate increment of `assets_version` during deployment using such code placed in `deploy.rb`:

```ruby
before "symfony:cache:warmup", "assets_version:increment", "symfony:cache:clear"

namespace :assets_version do
  task :increment do
    capifony_pretty_print "--> Increase assets_version"

run "#{latest_release}/bin/console assets-version:increment --env=#{symfony_env_prod}"

capifony_puts_ok
  end
end
```

KachkaevAssetsVersionBundle

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