引入环境变量

src/get_hotband.js

@@ -2,8 +2,10 @@
 
 const request = require('request');
 const fs = require('fs');
+const { dirname } = require('path');
+const path = require('path');
 
-console.log("Start running ...");
+const DATA_FOLDER = path.join(dirname(__dirname), process.env.DATA_FOLDER ?? 'data');
 
 // 请求微博热搜 APi 接口
 async function getApiResult(url) {
@@ -52,7 +54,7 @@ function saveJSON({ now, fileNameSuffix, object, compress = true, uncompress = t
     // console.log( "year, month, day, hour, minute: " + year + ", " + month + ", " + day + ", " + hour + ", " + minute);
 
     // 创建当前文件夹
-    let folder = `./data/${year}/${month}/${day}`;
+    let folder = `${DATA_FOLDER}/${year}/${month}/${day}`;
     createFolder(folder);
     let fileName = `${folder}/${year}${month}${day}_${hour}${minute}_${fileNameSuffix}`;
 
@@ -68,6 +70,8 @@ function saveJSON({ now, fileNameSuffix, object, compress = true, uncompress = t
 }
 
 async function main() {
+    console.log("DATA_FOLDER", DATA_FOLDER);
+
     let requestTimestamp = Date.now();
     let now = new Date(requestTimestamp + 8 * 3600 * 1000).toISOString();
 
@@ -158,7 +162,6 @@ async function main() {
                  * 两者差值通过观测似乎最大是 1250000
                  * 例如 【爆】唐山打架事件8名违法嫌疑人已到案 这条热搜一开始 delta 首先不断增大，最大达到 1250000
                  * 然后热搜数量增加到 12600000 左右的时候，delta 逐渐减小到 1040000 左右
-                 * 所有热搜的 detla（带正负） 加起来就是基本上在100000-230000之间
                  */
                 num: item.num,
                 raw_hot: item.raw_hot,
@@ -235,7 +238,7 @@ async function main() {
         /**
          * 更新最新的
          */
-        fs.writeFileSync(`./data/latest.json`, JSON.stringify({
+        fs.writeFileSync(`${DATA_FOLDER}/latest.json`, JSON.stringify({
             update_time: requestTimestamp,
             update_time_friendly: now.substring(0, 19).replace(/T/g, " "),
             regulation: convert2,