Development

• Technologies
• Ghcid
• HLint
• Webapp
  • Build Images
  • Deployment

Technologies

• Programming language: Haskell
• Dependency management: Stack
• Backend: SQLite
• Database access: sqlite-simple
• Command line parsing: Optparse Applicative
• Formatting: Prettyprinter
• Prelude: Protolude
• IDs: ULID
• Desktop App: Declarative GTK

Check out the makefile for all development tasks

Ghcid

Ghcid with color output for GHC 8.4 (probably obsolete in 8.6):

ghcid \
  --command="stack ghci --ghci-options=-fdiagnostics-color=always"

HLint

hlint \
  --ignore="Redundant do" \
  --ignore="Use list literal" \
  --ignore="Use String" \
  --ignore="Redundant bracket" \
  --ignore="Use camelCase" \
  .

Webapp

Build Images

Build base image for webapp runtime image:

docker build \
  --file tasklite-core/dockerfiles/haskell-datasette \
  --tag haskell-datasette \
  dockerfiles

Build runtime image:

stack image container
docker tag adius/tasklite-tasklite:latest adius/tasklite:latest

Deployment

On Google Cloud:

docker tag adius/tasklite-tasklite:latest gcr.io/deploy-219812/tasklite:latest

docker push gcr.io/deploy-219812/tasklite:latest

kubectl create -f kubernetes/deployment.yaml

kubectl port-forward tasklite-deployment-77884ff4f6-66sjf 8001

Open 127.0.0.1:8001

docker build \
  --file dockerfiles/nginx-proxy \
  --tag gcr.io/deploy-219812/nginx-proxy:latest \
  dockerfiles; \
and docker push gcr.io/deploy-219812/nginx-proxy:latest; \
and kubectl replace --filename kubernetes/deployment.yaml --force; \
and sleep 8;
and kubectl port-forward \
  (kubectl get pods --selector app=tasklite --output name) 8080

Afterwards change the health check URL to /healthcheck for the load balancer at https://console.cloud.google.com/compute/healthChecks.