rust-script demo

Prereq:

• Rust installed - https://rust-lang.org/tools/install/
• cargo install rust-script - see https://rust-script.org/

Run script directly:

rust-script demo.rs

Create a binary and run it (example):

mkdir -p tmp
rust-script --pkg-path tmp -p demo.rs
# NOTE: the binary will have some generated name like demo_a52c79374dc3047b361b5783 
# It is recommended to rename it to demo e.g. by
# sed -i 's/name = "demo_[^"]*/name = "demo/' tmp/Cargo.toml
# or you can edit tmp/Cargo.toml manually 
cargo build -r --manifest-path tmp/Cargo.tomls
./tmp/target/release/demo  # demo only works if this is the name in Cargo.toml