build: adds nixdo and makes flake even more robust

flake.nix

@@ -43,6 +43,7 @@
           buildInputs = [
             pkgs.poetry
             pkgs.pdmeEnv
+            pkgs.pdme
           ];
         };
 

nixdo.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+# Do - The Simplest Build Tool on Earth.
+# Documentation and examples see https://github.com/8gears/do
+
+set -Eeuo pipefail # -e "Automatic exit from bash shell script on error"  -u "Treat unset variables and parameters as errors"
+
+build() {
+   echo "I am ${FUNCNAME[0]}ing"
+   poetry build
+}
+
+test() {
+   echo "I am ${FUNCNAME[0]}ing"
+   flake8 pdme tests
+   mypy pdme
+   pytest
+}
+
+htmlcov() {
+	pytest --cov-report=html
+}
+
+release() {
+   ./scripts/release.sh
+}
+
+all() {
+   build && test
+}
+
+"$@" # <- execute the task
+
+[ "$#" -gt 0 ] || printf "Usage:\n\t./nixdo.sh %s\n" "($(compgen -A function | grep '^[^_]' | paste -sd '|' -))"