feat: create script to add step between two steps

curriculum/tools/create-step-between.js

@@ -0,0 +1,53 @@
+const {
+  reorderSteps,
+  createStepFile,
+  getChallengeSeed,
+  padWithLeadingZeros,
+  getExistingStepNums,
+  getProjectPath
+} = require('./utils');
+
+const allStepsExist = (steps, stepsToFind) =>
+  stepsToFind.every(num => steps.includes(num));
+
+const projectPath = getProjectPath();
+const argValuePairs = process.argv.slice(2);
+
+const args = argValuePairs.reduce((argsObj, arg) => {
+  const [argument, value] = arg.replace(/\s/g, '').split('=');
+  if (!argument || !value) {
+    throw `Invalid argument/value specified: ${arg}`;
+  }
+  return { ...argsObj, [argument]: value };
+}, {});
+
+let { start, end } = args;
+start = parseInt(start, 10);
+end = parseInt(end, 10);
+
+if (
+  !Number.isInteger(start) ||
+  !Number.isInteger(end) ||
+  start < 1 ||
+  start !== end - 1
+) {
+  throw 'Step not created. Steps specified must be' +
+    ' consecutive numbers and start step must be greater than 0.';
+}
+
+const existingSteps = getExistingStepNums(projectPath);
+if (!allStepsExist(existingSteps, [start, end])) {
+  throw 'Step not created. At least one of the steps specified does not exist.';
+}
+
+const challengeSeed = getChallengeSeed(
+  `${projectPath}part-${padWithLeadingZeros(start)}.md`
+);
+createStepFile({
+  stepNum: start,
+  projectPath,
+  challengeSeed,
+  stepBetween: true
+});
+console.log(`Sucessfully added step between step #${start} and step #${end}`);
+reorderSteps();