"error: Unknown option" while building

[for-coursera]

Could please help me compiling your project a bit :)

First, I have rustup 1.18.3 (435397f48 2019-05-22) and cargo 1.36.0 (c4fcfb725 2019-05-15) installed. And $HOME/.cargo/bin is present in my $PATH.

Now, I cloned your repository, and if I try to run cargo build in it, it installs crates (I see those in $HOME/.cargo/registry/index) and then fails saying "error: Unknown option".

And if I try to run rusts src/main.rs, it fails saying something like the following:

error[E0432]: unresolved import `clap`
 --> src/main.rs:1:5
  |
1 | use clap::{App, Arg};
  |     ^^^^ maybe a missing `extern crate clap;`?

error[E0433]: failed to resolve: maybe a missing `extern crate termcolor;`?
 --> src/main.rs:7:5
  |
7 | use termcolor::{
  |     ^^^^^^^^^ maybe a missing `extern crate termcolor;`?
[rest skipped]

As if it doesn't see installed crates from $HOME/.cargo/registry for some reason... So, what could be wrong here? Any hints may be? :)

Thanks.

[mookid]

hi @for-coursera,

I am a bit puzzled about your issue.

First of all, you probably want to use cargo to build the dependencies (clap and termcolor) and not call rustc directly yourself.

I set up the CI build, which should at least give you a recipe to build the project.

What is the output of cargo build --verbose?

[for-coursera]

What is the output of cargo build --verbose?

Same:

diffr> cargo build --verbose
    Updating crates.io index
error: Unknown option

(Just in case, it does updates crates in the process.)

Could it be related to my macOS being too old? cargo is all fresh, though.

[mookid]

I think it is a good issue for the cargo people indeed. I will not be able to reproduce it.

What is your version of osx?