CLI parameter for output dir.

index.js

@@ -1,10 +1,12 @@
-// node --require regenerator-runtime/runtime --require ./babel-local --require isomorphic-fetch index.js
+// node --require regenerator-runtime/runtime --require ./babel-local --require isomorphic-fetch index.js ..\out
 
 import {createWriteStream, promises} from 'fs';
+import {resolve} from 'path';
 
 const {access, rename} = promises;
 
-async function work () {
+async function work (prefix) {
+    console.info(`Output directory: ${prefix}`);
     let rootUri = 'https://data.gov.sk/api/3/action/package_search?fq=%2btitle:Vestn%C3%ADk%20verejn%C3%A9ho%20obstar%C3%A1vania*&rows=9999&sort=metadata_created_date%20asc';
     const datasetsRaw = await fetch(rootUri);
     const {result: {count, results}} = await datasetsRaw.json();
@@ -14,13 +16,13 @@ async function work () {
         const saves = [];
         for (let {name, description, url} of resources) {
             const [, issue, year] = name.match(/(\d+)\/(\d+)/);
-            const target = `${year}.${issue}.xml`;
+            const target = `${prefix}/${year}.${issue}.xml`;
             if (await access(target).then(() => true, () => false))
                 continue;
             console.info(`File ${year} / ${issue}: ${description}`);
             const xmlRaw = await fetch(url);
             saves.push((async () => {
-                const temporary = `${year}.${issue}.xml.download`;
+                const temporary = `${prefix}/${year}.${issue}.xml.download`;
                 await xmlRaw.body.pipe(createWriteStream(temporary));
                 await rename(temporary, target);
             })());
@@ -30,4 +32,5 @@ async function work () {
     return results;
 }
 
-work().catch(error => console.error(error));
+work(resolve(process.argv[2] || ''))
+    .catch(error => console.error(error));