uv run with stdin

[billy-doyle]

inspired by https://docs.astral.sh/uv/guides/scripts/#declaring-script-dependencies and some tweets being able to just send someone a command and boom they can run a py script

MRE:

billy@sa ~/uv_eof % uv run - <<EOF
print("hello world")
EOF
error: Failed to spawn: `-`
  Caused by: No such file or directory (os error 2)

Short dash(-) here represents stdin, similar to how k8s allows:

kubectl apply -f - <<EOF
apiVersion: v1
kind: ServiceAccount
metadata:
  name: kubectl-actions
  namespace: my-v2-restore
EOF

Some more details and how kubectl does it (in go tho ofc) https://stackoverflow.com/a/72168173/9992341 and https://github.com/kubernetes/cli-runtime/blob/v0.21.0/pkg/resource/builder.go#L245

basically turns any snippet someone else wants to run with

billy@sa ~/uv_eof % curl -LsSf https://astral.sh/uv/install.sh | sh && uv run - <<EOF               
print("hello world")
EOF

[zanieb]

Yeah, we can support this.

[charliermarsh]

This should be not-too-difficult to add if anyone is looking for a contribution :)

[charliermarsh]

I'm gonna do this as a break from hard issues!