Development

Main technologies:

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

Check out the makefile for all development tasks

Generate Screenshots

Use asciinema to generate the terminal recording:

asciinema rec \
  --title 'TaskLite Help Page' \
  --command 'tasklite help' \
  --overwrite \
  screenshots/recording.json

asciinema rec \
  --title 'TaskLite "withtag" Command' \
  --command 'tasklite withtag tasklite' \
  --overwrite \
  screenshots/withtag.json

Change the size of the terminal in the recording.json file to:

  "width": 80,
  "height": 86,

Then use svg-term to generate the SVG image:

svg-term \
  --no-cursor \
  --at 99999 \
  --window \
  --term iterm2 \
  --profile ~/dotfiles/terminal/adius.itermcolors \
  < screenshots/recording.json \
  > screenshots/recording.svg

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.

TaskLite Documentation