Zero to Production in Rust

Faster inner development loop

1. Install an alternative linker for the current OS (see Cargo.toml)
2. cargo install cargo-watch
3. cargo watch -x check -x test -x run

De-occupy the port

lsof -t -i tcp:8000 | xargs kill -9

Expand macros

1. cargo install cargo-expand
2. rustup toolchain install nightly --allow-downgrade
3. cargo +nightly expand

Remove unused dependencies

1. cargo install cargo-udeps
2. cargo +nightly udeps

Docker

# Update SQLx schema for offline builds
cargo sqlx prepare -- --lib

# Build and run image
docker build --tag zero2prod --file Dockerfile .
docker run -p 8000:8000 --network=host zero2prod

Digital Ocean

# Create app
doctl apps create --spec spec.yaml

# Get app ID and URL
app_id=$(doctl apps list | awk '/zero2prod/ {print $1}')
app_url=$(doctl apps list | awk '/zero2prod/ {print $3}')

# Update app
doctl apps update $app_id --spec=spec.yaml

# Migrate database
DATABASE_URL=$database_url sqlx migrate run

# Health check
curl -v $app_url/health_check

# Post
curl -v $app_url/subscriptions -d 'name=Le%20Guin&email=ursula%40leguin.com'

# Delete
doctl app delete --force $app_id