Create packages for split modules.

Fixes #47.

scripts/generate-packages.js

@@ -1,6 +1,10 @@
 #!/usr/bin/env babel-node
 
 import { readFileSync as read, writeFileSync as write } from "fs";
+import { sync as glob } from "glob";
+import { sync as mkdir } from "mkdirp";
+import { join, resolve } from "path";
+import { Plugin, types as t, transformFileSync as transform } from "babel";
 
 const source = JSON.parse(read("package.json", "utf8"));
 
@@ -12,3 +16,52 @@ const main = {
 };
 
 write("dist/main/package.json", JSON.stringify(main), "utf8");
+
+function getModuleSpecifierByName (filename) {
+    return filename
+        .replace(/\.js$/, "")
+        .split("/");
+}
+
+glob("*/*.js", { cwd: "src" }).map((mod) => {
+    const [category, name] = getModuleSpecifierByName(mod);
+    const dependencies = {};
+
+    const transformed = transform(join("src", mod), {
+        plugins: [new Plugin("fix-imports", {
+            visitor: {
+                ImportDeclaration (node, parent) {
+                    const importSource = node.source.value;
+
+                    if ( importSource[0] !== "." ) { return; }
+
+                    if ( importSource[1] === "." ) {
+                        const [category, name] = getModuleSpecifierByName(importSource.substr(3));
+                        dependencies[`${source.name}.${category}.${name}`] = source.version;
+                        node.source = t.Literal(`${source.name}.${category}.${name}`);
+                    } else {
+                        const name = importSource.substr(2);
+                        dependencies[`${source.name}.${category}.${name}`] = source.version;
+                        node.source = t.Literal(`${source.name}.${category}.${name}`);
+                    }
+                },
+            },
+        })],
+    });
+
+    const pkg = {
+        ...main,
+        name: `${source.name}.${category}.${name}`,
+        index: "index.js",
+        files: ["index.js", "index.js.map"],
+        dependencies: {
+            ...source.dependencies,
+            ...dependencies,
+        },
+    };
+
+    const dir = join("dist", "split", `${category}.${name}`);
+    mkdir(dir);
+    write(join(dir, "package.json"), JSON.stringify(pkg), "utf8");
+    write(join(dir, "index.js"), transformed.code, "utf8");
+});