split into gdal-sys and gdal crate

[jdroenner]

Split rust-gdal into a gdal-sys and a (rust-) gdal crate.

(I'm currently working on this)

[frewsxcv]

Sounds great! I've been meaning to do this for a while.

[jdroenner]

@frewsxcv should i add the rust-sys repository to georust? ;)

[frewsxcv]

I'd recommend having both gdal and gdal-sys library crates exist within the same repository. This way, if there are ever updates to gdal-sys, gdal will get updated to reflect the changes at the same time.

There a couple strategies for doing this:

gdal-sys within gdal

/Cargo.toml (config for 'gdal')
/src/ (source files for 'gdal')
/gdal-sys/ (crate for 'gdal-sys')
/gdal-sys/Cargo.toml (config for 'gdal-sys')
/gdal-sys/src/ (source files for 'gdal-sys')

An example: https://github.com/alexcrichton/git2-rs

gdal-sys and gdal separate w/ cargo workspace

cargo workspaces are relatively new: https://github.com/rust-lang/rfcs/blob/master/text/1525-cargo-workspace.md

/Cargo.toml (workspace config)
/gdal/ (crate for 'gdal')
/gdal/Cargo.toml (config for 'gdal')
/gdal/src/ (source files for 'gdal')
/gdal-sys/ (crate for 'gdal-sys')
/gdal-sys/Cargo.toml (config for 'gdal-sys')
/gdal-sys/src/ (source files for 'gdal-sys')

An example: https://github.com/servo/webrender

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Nowadays I prefer the second option

[jdroenner]

I've been wondering how to do this and the examples are really helpful, thanks! Cargo workspaces look really nice.