Build source bundle including vendored dependencies

[bachp]

This simplifies boostrapping as one can just download the bundle
including all dependencies.

Closes #50

[bachp]

Not sure how to test this

[bachp]

Ok I was able to test it: https://github.com/bachp/cargo-vendor/releases

[alexcrichton]

It looks like this creates a tarball for just the dependencies? Perhaps this could create a tarball for the source code itself?

[bachp]

@alexcrichton No it actually creates a tarball including the sources + a vendor folder.

• git archive is used to get a clean source tree
• the build cargo vendor binary is used to fetch the vendor directory which is then copied into the new tarball
• the resulting folder is then put into the tarball

[alexcrichton]

Could this just produce one tarball with all source code necessary? I feel like that's what a "standard source tarball" generally looks like...

[bachp]

@alexcrichton I'm not sure what you mean with "all source code necessary". The tarball contains the cargo-vendor source code as found on github plus the vendored depenencies in a vendor directory. You can have a look at my example here.

Do you expect it to contain more? Or is there some more source code that I'm missing?

[alexcrichton]

Hm I think I may have read the wrong version of the patch... in any case sorry this looks great! Could the tarball be called cargo-vendor-src-$TAG.tar.gz perhaps?

[bachp]

Done

Example will appear here once the build is complete

[alexcrichton]

Thanks!