Eject command - refs #44

[jdonaghue]

Putting this out now for initial review. The basic idea is that each command will optionally implement an eject method. The base cli will call into that eject method with two helpers npm and files which respectively add to the current projects package.json and copies important files over to the current project.

npm is capable of assigning dependencies, devDependencies, and scripts to the current projects package.json. It will run npm install after it has finished assignments but only if there were no collisions.

files takes an array of fully-qualified file paths and copies them into the current project creating the necessary folders to do so, as long as there are no collisions.

Keep in mind this is still a WIP and needs better collision checking/messaging as well as a prompt to ensure the user understands the finality of this commands execution.

It can be run in the following way:

• dojo eject - will run through all commands and attempt to eject if the method is defined. Right now it will fail if a command doesn't have an eject defined but that should probably only be the case when there is a specific command specified and not for this generic execution pattern.
• dojo eject -g groupName - will run through all commands within a group and attempt to eject if the method is defined. Again it will fail if a command doesn't define an eject method, but that behavior should probably be reserved for when a specific command is specified.
• dojo eject -g groupName -c commandName - will try to eject this command. If an eject method is not implemented on the command it will fail.

Also, tests are still needed.

[codecov-io]

Codecov Report

Merging #89 into master will increase coverage by 0.21%.

@@            Coverage Diff             @@
##           master      #89      +/-   ##
==========================================
+ Coverage   99.24%   99.45%   +0.21%     
==========================================
  Files          12       15       +3     
  Lines         264      368     +104     
  Branches       23       43      +20     
==========================================
+ Hits          262      366     +104     
  Partials        2        2

Impacted Files	Coverage Δ
src/npmInstall.ts	100% <100%> (ø)
src/commands/eject.ts	100% <100%> (ø)
src/bin/dojo.ts	100% <ø> (ø)

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[jdonaghue]

@Tomdye thanks for the review! I will make these changes today

[agubler]

@jdonaghue how are these updates coming?

[jdonaghue]

@tomdye I have changed the npm helper to use reduce

[agubler]

@jdonaghue this now has a conflict in src/interfaces.ts, I would imagine as a result of #85 having been merged.

[jdonaghue]

OK @agubler thanks I will resolve the conflict today.