✨ add recursive file searcher methods

std/file.nas

@@ -31,7 +31,7 @@ var new = func(filename, mode="r") {
 
 var find_all_files_with_extension = func(path, extensions...) {
     var in_vec = func(ext) {
-        foreach(var i;extensions) {
+        foreach(var i; extensions) {
             if (ext==i) {
                 return 1;
             }
@@ -39,7 +39,7 @@ var find_all_files_with_extension = func(path, extensions...) {
         return 0;
     }
     var res = [];
-    foreach(var f;find_all_files(path)) {
+    foreach(var f; find_all_files(path)) {
         var tmp = split('.', f);
         if (size(tmp)>1 and in_vec(tmp[-1])) {
             append(res, f);
@@ -74,14 +74,55 @@ var recursive_find_files = func(path) {
     };
     while(var n = unix.readdir(dd)) {
         if (unix.isfile(path~"/"~n)) {
-            append(res.files,n);
+            append(res.files, n);
         } elsif (unix.isdir(path~"/"~n) and n!="." and n!="..") {
             var tmp = recursive_find_files(path~"/"~n);
             if (tmp!=nil) {
-                append(res.files,tmp);
+                append(res.files, tmp);
             }
         }
     }
     unix.closedir(dd);
     return res;
+}
+
+var recursive_find_files_flat = func(path) {
+    var tree_files = recursive_find_files(path);
+    if (tree_files==nil) {
+        return [];
+    }
+    var flat = [];
+    var bfs = [tree_files];
+    while(size(bfs)!=0) {
+        var first = pop(bfs);
+        foreach(var file_record; first.files) {
+            if (ishash(file_record)) {
+                append(bfs, file_record);
+                continue;
+            }
+            append(flat, first.dir~"/"~file_record);
+        }
+    }
+    return flat;
+}
+
+var recursive_find_files_with_extension = func(path, extensions...) {
+    var in_vec = func(ext) {
+        foreach(var i; extensions) {
+            if (ext==i) {
+                return 1;
+            }
+        }
+        return 0;
+    }
+
+    var files = recursive_find_files_flat(path);
+    var res = [];
+    foreach(var filename; files) {
+        var tmp = split('.', filename);
+        if (size(tmp)>1 and in_vec(tmp[-1])) {
+            append(res, filename);
+        }
+    }
+    return res;
 }