[TS] Fix relative paths for exports (#8517)

Fixes an issue where exports were using incorrect relative paths for
>=3 namespace levels. This is fixed by making the starting range of the
namespace components relative to the amount of components.

Co-authored-by: Björn Harrtell <[email protected]>

Author: trumully

src/idl_gen_ts.cpp

@@ -263,14 +263,9 @@ class TsGenerator : public BaseGenerator {
       for (const auto &def : it.second.definitions) {
         std::vector<std::string> rel_components;
         // build path for root level vs child level
-        if (it.second.ns->components.size() > 1)
-          std::copy(it.second.ns->components.begin() + 1,
-                    it.second.ns->components.end(),
-                    std::back_inserter(rel_components));
-        else
-          std::copy(it.second.ns->components.begin(),
-                    it.second.ns->components.end(),
-                    std::back_inserter(rel_components));
+        if (it.second.ns->components.size() > 0) {
+          rel_components.push_back(it.second.ns->components.back());
+        }
         auto base_file_name =
             namer_.File(*(def.second), SkipFile::SuffixAndExtension);
         auto base_name =
@@ -303,8 +298,12 @@ class TsGenerator : public BaseGenerator {
         if (it2.second.ns->components.size() != child_ns_level) continue;
         auto ts_file_path = it2.second.path + ".ts";
         code += "export * as " + it2.second.symbolic_name + " from './";
-        std::string rel_path = it2.second.path;
-        code += rel_path + ".js';\n";
+        int count = it2.second.ns->components.size() > 1 ? 2 : 1;
+        std::vector<std::string> rel_path;
+        std::copy(it2.second.ns->components.end() - count,
+                  it2.second.ns->components.end(),
+                  std::back_inserter(rel_path));
+        code += namer_.Directories(rel_path, SkipDir::OutputPathAndTrailingPathSeparator) + ".js';\n";
         export_counter++;
       }
 

tests/long_namespace.fbs

@@ -0,0 +1,7 @@
+namespace com.company.test;
+
+table Person {
+  name:string;
+  age:short;
+}
+root_type Person;

tests/longer_namespace.fbs

@@ -0,0 +1,7 @@
+namespace longer_namespace.a.b.c;
+
+table Person {
+  name:string;
+  age:short;
+}
+root_type Person;

tests/ts/TypeScriptTest.py

@@ -122,6 +122,9 @@ def esbuild(input, output):
     schema="../union_underlying_type_test.fbs"
 )
 
+flatc(options=["--ts"], schema="../long_namespace.fbs")
+flatc(options=["--ts"], schema="../longer_namespace.fbs")
+
 print("Running TypeScript Compiler...")
 check_call(["tsc"])
 print("Running TypeScript Compiler in old node resolution mode for no_import_ext...")

tests/ts/com/company/test.ts

@@ -0,0 +1,5 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+export { Person } from './test/person.js';

tests/ts/com/company/test/person.ts

@@ -0,0 +1,70 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class Person {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):Person {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsPerson(bb:flatbuffers.ByteBuffer, obj?:Person):Person {
+  return (obj || new Person()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsPerson(bb:flatbuffers.ByteBuffer, obj?:Person):Person {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new Person()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+name():string|null
+name(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
+name(optionalEncoding?:any):string|Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
+}
+
+age():number {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? this.bb!.readInt16(this.bb_pos + offset) : 0;
+}
+
+static startPerson(builder:flatbuffers.Builder) {
+  builder.startObject(2);
+}
+
+static addName(builder:flatbuffers.Builder, nameOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(0, nameOffset, 0);
+}
+
+static addAge(builder:flatbuffers.Builder, age:number) {
+  builder.addFieldInt16(1, age, 0);
+}
+
+static endPerson(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static finishPersonBuffer(builder:flatbuffers.Builder, offset:flatbuffers.Offset) {
+  builder.finish(offset);
+}
+
+static finishSizePrefixedPersonBuffer(builder:flatbuffers.Builder, offset:flatbuffers.Offset) {
+  builder.finish(offset, undefined, true);
+}
+
+static createPerson(builder:flatbuffers.Builder, nameOffset:flatbuffers.Offset, age:number):flatbuffers.Offset {
+  Person.startPerson(builder);
+  Person.addName(builder, nameOffset);
+  Person.addAge(builder, age);
+  return Person.endPerson(builder);
+}
+}

tests/ts/longer-namespace/a/b/c.d.ts

@@ -0,0 +1 @@
+export { Person } from './c/person.js';

tests/ts/longer-namespace/a/b/c.js

@@ -0,0 +1,3 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+export { Person } from './c/person.js';

tests/ts/longer-namespace/a/b/c.ts

@@ -0,0 +1,5 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+/* eslint-disable @typescript-eslint/no-unused-vars, @typescript-eslint/no-explicit-any, @typescript-eslint/no-non-null-assertion */
+
+export { Person } from './c/person.js';

tests/ts/longer-namespace/a/b/c/person.d.ts

@@ -0,0 +1,18 @@
+import * as flatbuffers from 'flatbuffers';
+export declare class Person {
+    bb: flatbuffers.ByteBuffer | null;
+    bb_pos: number;
+    __init(i: number, bb: flatbuffers.ByteBuffer): Person;
+    static getRootAsPerson(bb: flatbuffers.ByteBuffer, obj?: Person): Person;
+    static getSizePrefixedRootAsPerson(bb: flatbuffers.ByteBuffer, obj?: Person): Person;
+    name(): string | null;
+    name(optionalEncoding: flatbuffers.Encoding): string | Uint8Array | null;
+    age(): number;
+    static startPerson(builder: flatbuffers.Builder): void;
+    static addName(builder: flatbuffers.Builder, nameOffset: flatbuffers.Offset): void;
+    static addAge(builder: flatbuffers.Builder, age: number): void;
+    static endPerson(builder: flatbuffers.Builder): flatbuffers.Offset;
+    static finishPersonBuffer(builder: flatbuffers.Builder, offset: flatbuffers.Offset): void;
+    static finishSizePrefixedPersonBuffer(builder: flatbuffers.Builder, offset: flatbuffers.Offset): void;
+    static createPerson(builder: flatbuffers.Builder, nameOffset: flatbuffers.Offset, age: number): flatbuffers.Offset;
+}