wip: initial content gen

.gitignore

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+dist/
+node_modules/

build/.gitignore

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+work/

build/heredoc.mjs

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+// Refs:
+// - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals#tagged_templates
+
+export function heredoc(strings, ...values) {
+  // shuffle strings & expression values back together
+  const zipped = strings.reduce((acc, cur, idx) => {
+    acc.push(cur, values[idx] || '')
+    return acc
+  }, []).filter(x => x)
+
+  // rebuild as line-oriented
+  const asLines = zipped.join('').split(/[\r\n]+/)
+
+  // strip whitespace-only first & last lines 
+  asLines[0].trim().length === 0 ? asLines.shift() : null
+  asLines.slice(-1)[0].trim().length === 0 ? asLines.pop() : null
+
+  // find smallest indent
+  const indent = asLines.reduce((acc, cur) => {
+    const firstAt = cur.search(/\S/)
+    return Math.min(firstAt !== -1 ? firstAt : Number.POSITIVE_INFINITY, acc)
+   }, Number.POSITIVE_INFINITY)
+
+  // de-indent all lines
+  const snipped = asLines.map(line => {
+    if (line.length < indent) { return "" }
+    return line.slice(indent)
+  })
+
+  // rejoin into multiline string
+  return snipped.join("\n")
+}

build/heredoc.unit.test.mjs

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+import { describe, expect, it } from '@jest/globals';
+import { heredoc } from './heredoc.mjs'
+
+describe("heredoc", () => {
+  it("trims head/tail empty lines & de-indents", async () => {
+    const actual = heredoc`
+      ---
+      indented:
+        like:
+        - yaml
+    `
+    const expected =
+`---
+indented:
+  like:
+  - yaml`
+
+    expect(actual).toBe(expected)
+  })
+})