script to copy typst partials to create extension

and add preamble

Author: gordonwoodhull

tools/copy-typst-partials.ts

@@ -0,0 +1,47 @@
+import * as path from 'stdlib/path';
+
+const srcTemplate = path.parse('../src/resources/formats/typst/pandoc/quarto/typst-template.typ');
+const destTemplate = path.parse('../src/resources/create/extensions/format-typst/_extensions/qstart-filesafename-qend/typst-template.typ');
+const srcShow = path.parse('../src/resources/formats/typst/pandoc/quarto/typst-show.typ');
+const destShow = path.parse('../src/resources/create/extensions/format-typst/_extensions/qstart-filesafename-qend/typst-show.typ');
+
+const templatePreamble = `
+// This is an example typst template (based on the default template that ships
+// with Quarto). It defines a typst function named 'article' which provides
+// various customization options. This function is called from the 
+// 'typst-show.typ' file (which maps Pandoc metadata function arguments)
+//
+// If you are creating or packaging a custom typst template you will likely
+// want to replace this file and 'typst-show.typ' entirely. You can find 
+// documentation on creating typst templates and some examples here: 
+//   - https://typst.app/docs/tutorial/making-a-template/
+//   - https://github.com/typst/templates
+`;
+
+const showPreamble = `
+// Typst custom formats typically consist of a 'typst-template.typ' (which is
+// the source code for a typst template) and a 'typst-show.typ' which calls the
+// template's function (forwarding Pandoc metadata values as required)
+//
+// This is an example 'typst-show.typ' file (based on the default template  
+// that ships with Quarto). It calls the typst function named 'article' which 
+// is defined in the 'typst-template.typ' file. 
+//
+// If you are creating or packaging a custom typst template you will likely
+// want to replace this file and 'typst-template.typ' entirely. You can find
+// documentation on creating typst templates here and some examples here:
+//   - https://typst.app/docs/tutorial/making-a-template/
+//   - https://github.com/typst/templates
+`;
+
+const encoder = new TextEncoder(), decoder = new TextDecoder();
+const scriptDir = import.meta.dirname;
+
+async function splicePartial(preamble : string, source : string, dest : string) {
+  const template = await Deno.readFile(path.join(scriptDir, path.format(source)));
+  const templateOut = preamble + decoder.decode(template);
+  await Deno.writeFile(path.join(scriptDir, path.format(dest)), encoder.encode(templateOut));
+}
+
+await splicePartial(templatePreamble, srcTemplate, destTemplate);
+await splicePartial(showPreamble, srcShow, destShow);