Isolated builds of dependencies

src/textUtils.ts

@@ -0,0 +1,67 @@
+export const json = JSON.stringify;
+
+/**
+ * Capitalize the first character.
+ */
+export const ucfirst = (value: string) =>
+  value.slice(0, 1).toUpperCase() + value.slice(1);
+
+/**
+ * Convert to a camel-case starting with uppercase.
+ *
+ * Example: `one two three` => `OneTwoThree`
+ */
+export const upperCamelize = (name: string) =>
+  name
+    .split(/[^a-zA-Z0-9]+/g)
+    .filter((x) => x)
+    .map((v) => ucfirst(v))
+    .join("");
+
+/**
+ * Add a prefix to every line in some text.
+ */
+export const indent = (
+  prefix: string,
+  text: string,
+  includeEmptyLines = false
+): string =>
+  text
+    .split("\n")
+    .map((line: string) => (line || includeEmptyLines ? prefix + line : line))
+    .join("\n");
+
+/**
+ * Basic templating rendering.
+ *
+ * String values in `vars` will be used for simple substitution
+ * of `@@KEY@@`, while boolean values will be used for
+ * conditional sections of code between `#@@ IF KEY` and `#@@
+ * ENDIF KEY`.
+ */
+export const renderTmpl = (
+  tmpl: string,
+  vars: { [name: string]: string | boolean }
+): string => {
+  let result = tmpl;
+  for (const [name, value] of Object.entries(vars)) {
+    if (typeof value === "string") {
+      result = result.replace(`@@${name}@@`, value);
+    }
+    if (typeof value === "boolean") {
+      const lines = result.split("\n");
+      const startIdx = lines.indexOf(`#@@ IF ${name}`);
+      const endIdx = lines.indexOf(`#@@ ENDIF ${name}`);
+      if (startIdx !== -1 && endIdx > startIdx) {
+        if (value) {
+          lines.splice(endIdx, 1);
+          lines.splice(startIdx, 1);
+        } else {
+          lines.splice(startIdx, endIdx - startIdx + 1);
+        }
+        result = lines.join("\n");
+      }
+    }
+  }
+  return result;
+};