allow procmacro usage in integration tests

[CobaltCause]

If generating code for an integration test, avoid returning FoundCrate::Itself since that leads to incorrect paths. This fixes #10.

[bkchr]

The general idea is nice!

However, it would not work currently. It would return CrateNotFound because a crate is normally not a dependency of itself.

        if let Some(toml::Value::Table(t)) = cargo_toml.get("package") {
            if let Some(toml::Value::String(s)) = t.get("name") {
                if s == orig_name {
                    if env::var_os("CARGO_TARGET_TMPDIR").is_some() {
                        return Ok(FoundCrate::Itself);
                    } else {
                        return Ok(FoundCrate::Name(sanitize_crate_name(orig_name));
                }
            }
        }

This should do it.

[CobaltCause]

I've added a commit to address that concern.

It appeared to work for me (see here and here), but I just realized that's probably because I wasn't using the crate correctly. Indeed, what I had before didn't actually work after fixing that. It works after adding that commit though.

(Sidenote, I think your .is_some() is a typo; CARGO_TARGET_TMPDIR is only set for integration tests and not libraries/binaries, and for the latter it needs to return FoundCrate::Itself and for the former we need FoundCrate::Name.)

[CobaltCause]

@bkchr any chance of doing a crates.io release with this change?

[bkchr]

@SoftwareSheriff published as 1.1.0