Allow not existing files for external modules

[tolemac]

When process the external imports may be that the file don't exists, then when you access to the property "file" of exportMap item and get an error.

I think the first to do is to check externals parameters, if externals is false you haven't if the file is excluded, and if 'externals' is false It may be that the file does not exist then you have to check p to access to p.file.

I'm generating .d.ts for ng-forward project and I have been problems with reactive/rxjs import, with these changes work fine.

[basarat]

@tolemac This project is without owner. Would you be willing to take over?

[basarat]

/cc @vvakame for approval (I already have all the access to be able to transfer it) 🌹

[tolemac]

@basarat I'm not sure about it. I don't have a lot of experience on open source projects. By the other hand this is a small project, may be a good start.
If I need help or have any problem in the future, can I ask you? If you say yes, I also.

[tolemac]

According to autodts-generator readme TypeScript 1.8 implements the main goal of this project.
Is correct?

[basarat]

@tolemac indeed. Also there is https://github.com/SitePen/dts-generator that I now personally use. But lately, even simpler just going with node module resolution : https://basarat.gitbooks.io/typescript/content/docs/node/nodejs.html

Maybe it isn't sufficient for people, or maybe there isn't much education, nevertheless I haven't had the need for this project lately

[tolemac]

I have been testing dts-generator and autodts and don't like them.
I like dts-bundle because it start from a d.ts file, don't need tsconfig.json and exports only that I want.

To have this pull request would be nice.

[basarat]

@tolemac I've added you as a collab here. Feel free to merge the PR and own this project 🌹

I also wrote one possible workflow you can follow : https://medium.com/@basarat/possible-workflow-for-npm-module-contribution-8e6b3c54f4e2#.hpeefm6mi 🌹 feel free to customize / ask for help.

Also added you as a collab on https://www.npmjs.com/package/dts-bundle 🌹

[basarat]

PS : sorry for the late reply 🌹

[tolemac]

Ok. I get down to work ;)