[HttpKernel] Added 'isDevEnvironment' method to Kernel class

[aurimasniekis]

Q	A
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no
Tests pass?	yes
Fixed tickets
License	MIT
Doc PR

I have worked with many symfony based projects which uses different/multiple environments and I hate when people are checking if current environment is dev by using statement like this:
->getEnvironment() === 'dev'
which breaks all other environment namings. By providing a kernel method which will tell you if you are in dev environment will help people like me to extend it for own project environment naming strategy.

Please support this common convention for detecting dev environment. This will help to stop hacking things.

[fabpot]

👎 from me: Symfony does not care about the environment names. dev and prod just happen to be convention used by Symfony Standard Edition.

[aurimasniekis]

I agree but the people who writes libraries/bundles uses it to detect dev without any way to change it to something else...

[fabpot]

You should not check that. Most of the time, you are checking is the debug mode is enabled.

[aurimasniekis]

That would be really cool if everybody would use isDebug instead getEnvironment() === 'dev'