feat: implement dir walkjs

eo2js-runtime/src/objects/org/eolang/fs/dir$walk.js

@@ -1,8 +1,10 @@
 const object = require('../../../../runtime/object')
-const {LAMBDA} = require('../../../../runtime/attribute/specials');
+const {LAMBDA, RHO} = require('../../../../runtime/attribute/specials');
 const at_void = require('../../../../runtime/attribute/at-void');
 const data = require('../../../../runtime/data');
-const glob = require('glob');
+const dataized = require('../../../../runtime/dataized');
+const fs = require('fs');
+const path = require('path');
 
 /**
  * Dir.walk recursively walks a directory and returns files matching a glob pattern.
@@ -11,10 +13,38 @@ const glob = require('glob');
 const dir$walk = function() {
   const obj = object('dir$walk')
   obj.attrs['glob'] = at_void('glob')
-  obj.assets[LAMBDA] = function(_) {
-    const pattern = obj.attrs['glob'].data;
-    const files = glob.sync(pattern);
-    return data.toObject(files.join('\n'));
+  obj.assets[LAMBDA] = function(self) {
+    const dirPath = dataized(self.take(RHO).take('file').take('path')).toString();
+    const pattern = dataized(self.take('glob')).toString();
+    const absPath = path.resolve(dirPath);
+    const phi = require('../../../../runtime/phi');
+    const eolang = phi.take('org.eolang');
+    const fs_file = eolang.take('fs.file');
+
+    const walkSync = function(dir, pattern) {
+      let results = [];
+      const list = fs.readdirSync(dir);
+      list.forEach(function(file) {
+        const filePath = path.join(dir, file);
+        const stat = fs.statSync(filePath);
+        if (stat && stat.isDirectory()) {
+          results = results.concat(walkSync(filePath, pattern));
+        } else {
+          const relativePath = path.relative(absPath, filePath);
+          if (require('minimatch')(relativePath, pattern)) {
+            results.push(fs_file.copy().with({0: data.toObject(relativePath)}));
+          }
+        }
+      });
+      return results;
+    }
+
+    try {
+      const files = walkSync(absPath, pattern);
+      return data.toTuple(files);
+    } catch (err) {
+      throw new Error(`Can't walk at ${absPath}: ${err.message}`);
+    }
   }
   return obj
 }

eo2js-runtime/test/objects/org/eolang/fs/dir$walk.test.js

@@ -1,13 +1,15 @@
 const assert = require('assert');
-const dir$walk = require('../../../../../temp/objects/org/eolang/fs/dir$walk');
-const {STRING} = require('../../../../../temp/runtime/types');
-const dataized = require('../../../../../temp/runtime/dataized');
-const data = require('../../../../../temp/runtime/data');
+const dir$walk = require('../../../../../src/objects/org/eolang/fs/dir$walk');
+const {STRING} = require('../../../../../src/runtime/types');
+const dataized = require('../../../../../src/runtime/dataized');
+const data = require('../../../../../src/runtime/data');
 const fs = require('fs');
 const path = require('path');
+const object = require('../../../../../src/runtime/object');
+const {RHO} = require('../../../../../src/runtime/attribute/specials');
 
 describe('dir$walk', function() {
-  const directory = path.resolve(__dirname, '../../../../../temp/test-dir');
+  const directory = path.resolve(__dirname, '../test-dir');
 
   beforeEach(function() {
     if (fs.existsSync(directory)) {
@@ -25,11 +27,16 @@ describe('dir$walk', function() {
   });
 
   it('should find files matching glob pattern', function() {
+    const dir = object('dir');
+    dir.attrs['file'] = object('file');
+    dir.attrs['file'].attrs['path'] = data.toObject(directory);
     const walk = dir$walk();
-    walk.attrs['glob'] = data.toObject('**/*.txt');
-    const result = dataized(walk, STRING).split('\n').sort();
+    walk.attrs[RHO] = dir;
+    walk.attrs['glob'] = data.toObject('**/*.txt'); 
+    const files = dataized(walk);
+    const paths = files.map(file => dataized(file.take('path'), STRING));
     assert.deepEqual(
-      result,
+      paths.sort(),
       [
         'file1.txt',
         'subdir/file3.txt'