调整构建逻辑，移除无效文件

src/gulpfile.js

@@ -0,0 +1,50 @@
+const { series, src, dest } = require('gulp')
+const through2 = require('through2')
+const plugin_country = require('./plugins/country')
+const plugin_city = require('./plugins/city')
+const plugin_cncity = require('./plugins/cncity')
+const plugin_china = require('./plugins/china')
+const plugin_cidrmerge = require('./plugins/cidrmerge')
+
+const database = '/tmp/openipdb.ipdb'
+
+const country = () => {
+  return src(database)
+    .pipe(through2.obj(function(file, _, cb) {
+      return plugin_country(this, file, cb)
+    }))
+    .pipe(through2.obj(plugin_cidrmerge))
+    .pipe(dest('data/country'))
+}
+
+const city = () => {
+  return src(database)
+    .pipe(through2.obj(function(file, _, cb) {
+      return plugin_city(this, file, cb)
+    }))
+    .pipe(through2.obj(plugin_cidrmerge))
+    .pipe(dest('data/country'))
+}
+
+const cncity = () => {
+  return src(database)
+    .pipe(through2.obj(function(file, _, cb) {
+      return plugin_cncity(this, file, cb)
+    }))
+    .pipe(through2.obj(plugin_cidrmerge))
+    .pipe(dest('data/cncity'))
+}
+
+const china = () => {
+  return src('data/country/CN.txt')
+    .pipe(through2.obj(function(file, _, cb) {
+      return plugin_china(this, file, cb)
+    }))
+    .pipe(dest('data/special'))
+}
+
+exports.country = country
+exports.city = city
+exports.cncity = cncity
+exports.china = china
+exports.build = series(country, city, cncity, china)