cargo build in a workspaced crate builds workspaces' default members

[Nemo157]

I have a virtual workspace where I override the default-members. I expected this to just set the package that builds when in the root of the virtual workspace, however when I go into one of the members sub-directories I find that it still only builds the default members:

~/sources/embrio-rs → cargo build --verbose
       Fresh futures-core-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh either v1.5.0
       Fresh pin-utils v0.1.0-alpha.1
       Fresh memchr v2.0.1
       Fresh futures-channel-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh futures-io-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh embrio-core v0.1.0 (file:///Users/Nemo157/sources/embrio-rs/embrio-core)
       Fresh futures-sink-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh futures-util-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh embrio-util v0.1.0 (file:///Users/Nemo157/sources/embrio-rs/embrio-util)
       Fresh embrio v0.1.0 (file:///Users/Nemo157/sources/embrio-rs/embrio)
    Finished dev [unoptimized + debuginfo] target(s) in 0.09s

~/sources/embrio-rs/ → cd embrio-native

~/sources/embrio-rs/embrio-native → cargo build --verbose
       Fresh futures-core-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh pin-utils v0.1.0-alpha.1
       Fresh either v1.5.0
       Fresh memchr v2.0.1
       Fresh futures-channel-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh futures-io-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh embrio-core v0.1.0 (file:///Users/Nemo157/sources/embrio-rs/embrio-core)
       Fresh futures-sink-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh futures-util-preview v0.3.0-alpha.3 (https://github.com/rust-lang-nursery/futures-rs#09617ac0)
       Fresh embrio-util v0.1.0 (file:///Users/Nemo157/sources/embrio-rs/embrio-util)
       Fresh embrio v0.1.0 (file:///Users/Nemo157/sources/embrio-rs/embrio)
    Finished dev [unoptimized + debuginfo] target(s) in 0.07s

[jrobsonchase]

Just ran into this today. It seems to technically behave as the docs here specify, but I don't believe this is the desired behavior for real usage.

[Nemo157]

While it might technically behave as the docs specify, that means the case when default-members is unspecified doesn't work as the docs say.

When you go into the subdirectory of a workspaced crate without default-members and run cargo build it will build just the crate you are in, whereas the docs say when neither -p or --all are specified it should use the default default-members (either the root of the crate, or every member).

So when fixing this, it would probably be good to describe this a bit better in the docs as well.

[Nemo157]

Turns out this is pretty trivial to fix, and doesn't break any of the existing tests. I need to add a new test, and think about the docs, but I'll try and open a PR this week (@jrobsonchase thanks for reminding me about this issue).

[thomcc]

This is annoying for me.

@Nemo157 is there any chance you'll get around to this?

If not I could take a stab at it, since it's supposedly easy.