[Research] How to add some lines to the existing files when the user choose some of the features from prompt

[arkjel]

We need to start thinking how to add lines to the existing files conditionally when the user choose some of the features from the prompt. Now we have some duplicated files when the user choose the authentication feature.

For example: many files in the /schematics/web/e2e/framework/files/cypress/authentication and /schematics/web/e2e/framework/files/cypress/base are duplicated. The files in the authentication directory are the same as they are in the base directory but contains more files related to authentication feature.

Please look at that cases.

[OskarZaremba]

I have found two ways to modify content of files dynamically.

These are mentioned below:

• Modifying template files using ast (abstract syntax tree). It is not the easiest way and produce additional files required to modify content of existing ones.
• Modifying template files using conditional templates. It seems to be quite easy and it does not require additional files to modify content of existing ones.

As far as I am concerned it seems that using conditional templates is more efficient and easier to use. Usage examples can be found on branch feature/dynamic-template-files and its two commits.