improve superadd

[actuday6418]

• We now find the actual workspace/crate root instead of copying the given path directly. We still add only the given crate and not the whole workspace.
• There's an issue with adding crates that have local path dependencies that I wanted to solve. I looked into a number of possibilities but I think the only way is to parse Cargo.toml and "vendor" those dependencies. I avoided that here because of the complexity and because it is likely to be brittle.
• We use the path hash to create the temporary folder and the temporary folders are deleted only at shutdown. This is to prevent unnecessary copying every time we reload the same dependency.

[sigmaSd]

For :sadd you can just change this https://github.com/sigmaSd/IRust/pull/157/files#diff-5bf54fed045d43c97cfa116fc81826ab7233767b77059365e6b6b1940d99a8d1L227 to if input.starts_with(":sadd")

[sigmaSd]

For 2. : Maybe you can:

• parse the Cargo.toml
• note any local paths
• transform them to absolute paths
• copy the crate
• change the local paths to absolute

[actuday6418]

For :sadd you can just change this https://github.com/sigmaSd/IRust/pull/157/files#diff-5bf54fed045d43c97cfa116fc81826ab7233767b77059365e6b6b1940d99a8d1L227 to if input.starts_with(":sadd")

How can we tell irust that though? It wouldn't be in :help right?

[sigmaSd]

There is no api for that yet, but I think its possible to add a new command like CommandDoc or something that appends to the help text and show up in tab completion, but for now I think you can just do the change, either way the current script doesn't document its behavior as well