Maintainers Note: The originally title and post contents are below. This has been modified since the current issue is related, but different, as described here.

When using Podman, if we have a symlink to our bind mount, we a permissions error, saying it cannot access the data within the volume. This only happens with paths we do not canonicalize. Here, we create an example with symlinks for our CARGO_HOME and XARGO_HOME. This probably also occurs for other bind mounts.

$ mkdir registry
$ export CARGO_HOME=$(realpath registry)/.cargo
$ export XARGO_HOME=$(realpath registry)/.xargo
$ ln -s ~/.cargo "${CARGO_HOME}"
$ ln -s ~/.xargo "${XARGO_HOME}"
$ git clone https://github.com/cross-rs/rust-cpp-hello-word
$ cd rust-cpp-hello-word
$ cargo build                                           # works
$  cross build --target aarch64-unknown-linux-gnu       # also just works

If we run in Podman, these directories are owned by root, not by the current user.

$ ls -la / | grep argo
drwxrwxr-x.   1 root   root     164 Jul  3 22:57 cargo
drwxrwxr-x.   1 root   root       6 Jun  2 03:36 xargo

Meanwhile, in Docker, they're mounted as the current user, and cross works fine:

ls -la / | grep argo
drwxrwxr-x.   1 1000 1000  164 Jul  3 22:57 cargo
drwxrwxr-x.   1 1000 1000    6 Jun  2 03:36 xargo

cross fails with "failed to create directory - file exists"

Steps to reproduce:

mkdir -p /tmp/.cargo
rm -rf ~/.cargo
ln -sT /tmp/.cargo ~/.cargo
git clone https://github.com/zserik/crulz-rs.git
cd crulz-rs
git checkout 754196bbbc4d99ed6634e83b8e3d2b7571ce7209
cross check --target armv7-unknown-linux-musleabihf

(working directory (should be rather irrelevant) is equivalent to: https://github.com/zserik/crulz-rs/tree/754196bbbc4d99ed6634e83b8e3d2b7571ce7209)

It happens when either $CARGO_HOME, $CARGO_HOME/registry, $CARGO_HOME/registry/cache or $CARGO_HOME/registry/index (or multiple of them) are symlinks.

I tried to run (with the same target):

• cross check
• cross clippy
• cross build
• cross build --release

I got the following error:

error: failed to create directory `/cargo/registry/cache/github.com-1ecc6299db9ec823`
error: failed to create directory `/cargo/registry/index/github.com-1ecc6299db9ec823`

Caused by:
  File exists (os error 17)