esbuild-pilet-plugin/lib/esm/index.mjs

Plugin for transforming pilets.

// src/index.ts
import { transformFileAsync } from "@babel/core";
import { promises } from "fs";
import { resolve, basename } from "path";

// src/importmap-plugin.ts
import { stringLiteral } from "@babel/types";
function babelPlugin(importmap) {
  return {
    visitor: {
      ImportDeclaration(path) {
        path.traverse({
          Literal(path2) {
            if (path2.node.type === "StringLiteral") {
              const name = path2.node.value;
              const entry = importmap.find((m) => m.name === name);
              if (entry) {
                path2.replaceWith(stringLiteral(entry.requireId || entry.id));
              }
            }
          }
        });
      }
    }
  };
}

// src/banner-plugin.ts
import template from "@babel/template";
function babelPlugin2(name, importmap, requireRef, schema, cssFiles) {
  const debug = process.env.NODE_ENV === "development";
  return {
    visitor: {
      Program(path) {
        const deps = importmap.reduce((obj, dep) => {
          obj[dep.id] = dep.ref;
          return obj;
        }, {});
        if (schema === "v2") {
          path.addComment("leading", `@pilet v:2(${requireRef},${JSON.stringify(deps)})`, true);
          if (cssFiles.length > 0) {
            const bundleUrl = `function(){try{throw new Error}catch(t){const e=(""+t.stack).match(/(https?|file|ftp|chrome-extension|moz-extension):\\/\\/[^)\\n]+/g);if(e)return e[0].replace(/^((?:https?|file|ftp|chrome-extension|moz-extension):\\/\\/.+)\\/[^\\/]+$/,"$1")+"/"}return"/"}`;
            const stylesheet = [
              `var d=document`,
              `var __bundleUrl__=(${bundleUrl})()`,
              `${JSON.stringify(cssFiles)}.forEach(cf=>{`,
              `var u=__bundleUrl__+cf`,
              `var e=d.createElement("link")`,
              `e.setAttribute('data-origin', ${JSON.stringify(name)})`,
              `e.type="text/css"`,
              `e.rel="stylesheet"`,
              `e.href=${debug ? 'u+"?_="+Math.random()' : "u"}`,
              `d.head.appendChild(e)`,
              `})`
            ].join(";\n");
            path.node.body.push(template.ast(`(function(){${stylesheet}})()`));
          }
        } else if (schema === "v3") {
          path.addComment("leading", `@pilet v:3(${requireRef},${JSON.stringify(deps)})`, true);
          if (cssFiles.length > 0) {
            path.node.body.push(template.ast(`export const styles = ${JSON.stringify(cssFiles)};`));
          }
        }
      }
    }
  };
}

// src/index.ts
var piletPlugin = (options) => ({
  name: "pilet-plugin",
  setup(build) {
    build.initialOptions.metafile = true;
    build.onEnd(async (result) => {
      const root = process.cwd();
      if (result.metafile) {
        const { outputs } = result.metafile;
        const { entryPoints } = build.initialOptions;
        const [name] = Object.keys(entryPoints);
        const entryModule = resolve(root, entryPoints[name]);
        const cssFiles = Object.keys(outputs).filter((m) => m.endsWith(".css")).map((m) => basename(m));
        await Promise.all(
          Object.keys(outputs).filter((m) => m.endsWith(".js")).map(async (file) => {
            const { entryPoint } = outputs[file];
            const isEntryModule = entryPoint && resolve(root, entryPoint) === entryModule;
            const path = resolve(root, file);
            const smname = `${file}.map`;
            const smpath = resolve(root, smname);
            const sourceMaps = smname in outputs;
            const inputSourceMap = sourceMaps ? JSON.parse(await promises.readFile(smpath, "utf8")) : void 0;
            const plugins = [babelPlugin(options.importmap)];
            if (isEntryModule) {
              plugins.push(
                babelPlugin2(options.name, options.importmap, options.requireRef, options.schema, cssFiles)
              );
            }
            const { code, map } = await transformFileAsync(path, {
              sourceMaps,
              inputSourceMap,
              comments: isEntryModule,
              plugins,
              presets: [
                [
                  "@babel/preset-env",
                  {
                    modules: "systemjs"
                  }
                ]
              ]
            });
            if (map) {
              await promises.writeFile(smpath, JSON.stringify(map), "utf8");
            }
            await promises.writeFile(path, code, "utf8");
          })
        );
      }
    });
  }
});
export {
  piletPlugin
};
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