add path normalization

[juliangruber]

As mentioned in https://github.com/juliangruber/hyperdrive-import-files/pull/23#issuecomment-253499239, it would make sense to me to fully treat entry.name as a path and thus also apply normalisation if necessary. Currently it's only treated as a String, and eg there could be two entries /entry and ./entry. This should help the modules depending on this to simplify their path logic.

[mafintosh]

great idea. do you know a module that helps with this?

[juliangruber]

this seems to work well:

const normalize = p => path.resolve('/', p)

Normalizes like this:

• / -> /
• . -> /
• ./foo -> /foo
• foo/bar -> /foo/bar
• foo/bar/ -> /foo/bar

[mafintosh]

Cool. In addition to that it should normalize windows paths to unix ones. \ --> /