[TS/JS] Entry point per namespace and reworked 1.x compatible single file build (#7510)

* [TS/JS] Entry point per namespace

* Fix handling of outputpath and array_test

* Attempt to fix generate_code

* Fix cwd for ts in generate_code

* Attempt to fixup bazel and some docs

* Add --ts-flat-files to bazel build to get bundle

* Move to DEFAULT_FLATC_TS_ARGS

* Attempt to add esbuild

* Attempt to use npm instead

* Remove futile attempt to add esbuild

* Attempt to as bazel esbuild

* Shuffle

* Upgrade bazel deps

* Revert failed attempts to get bazel working

* Ignore flatc tests for now

* Add esbuild dependency

* `package.json` Include esbuild

* `WORKSPACE` Add fetching esbuild binary

* Update WORKSPACE

* Unfreeze Lockfile

* Update WORKSPACE

* Update BUILD.bazel

* Rework to suggest instead of running external bundler

* Add esbuild generation to test script

* Prelim bundle test

* Run test JavaScriptTest from flatbuffers 1.x

* Deps upgrade

* Clang format fix

* Revert bazel changes

* Fix newline

* Generate with type declarations

* Handle "empty" root namespace

* Adjust tests for typescript_keywords.ts

* Separate test procedure for old node resolution module output

* Fix rel path for root level re-exports

* Bazel support for esbuild-based flatc

Unfortunately, we lose typing information because the new esbuild method
of generating single files does not generate type information.

The method used here is a bit hack-ish because it relies on parsing the
console output of flatc to figure out what to do.

* Try to fix bazel build for when node isn't present on host

* Auto formatting fixes

* Fix missing generated code

Co-authored-by: Derek Bailey <derekbailey@google.com>
Co-authored-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>

tests/ts/my-game/other-name-space/from-include.d.ts

@@ -0,0 +1,3 @@
+export declare enum FromInclude {
+    IncludeVal = "0"
+}

tests/ts/my-game/other-name-space/from-include.js

@@ -0,0 +1,5 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+export var FromInclude;
+(function (FromInclude) {
+    FromInclude["IncludeVal"] = "0";
+})(FromInclude = FromInclude || (FromInclude = {}));

tests/ts/my-game/other-name-space/from-include.ts

@@ -0,0 +1,5 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+export enum FromInclude {
+  IncludeVal = '0'
+}

tests/ts/my-game/other-name-space/table-b.d.ts

@@ -0,0 +1,24 @@
+import * as flatbuffers from 'flatbuffers';
+import { TableA, TableAT } from '../../table-a.js';
+export declare class TableB implements flatbuffers.IUnpackableObject<TableBT> {
+    bb: flatbuffers.ByteBuffer | null;
+    bb_pos: number;
+    __init(i: number, bb: flatbuffers.ByteBuffer): TableB;
+    static getRootAsTableB(bb: flatbuffers.ByteBuffer, obj?: TableB): TableB;
+    static getSizePrefixedRootAsTableB(bb: flatbuffers.ByteBuffer, obj?: TableB): TableB;
+    a(obj?: TableA): TableA | null;
+    static getFullyQualifiedName(): string;
+    static startTableB(builder: flatbuffers.Builder): void;
+    static addA(builder: flatbuffers.Builder, aOffset: flatbuffers.Offset): void;
+    static endTableB(builder: flatbuffers.Builder): flatbuffers.Offset;
+    static createTableB(builder: flatbuffers.Builder, aOffset: flatbuffers.Offset): flatbuffers.Offset;
+    serialize(): Uint8Array;
+    static deserialize(buffer: Uint8Array): TableB;
+    unpack(): TableBT;
+    unpackTo(_o: TableBT): void;
+}
+export declare class TableBT implements flatbuffers.IGeneratedObject {
+    a: TableAT | null;
+    constructor(a?: TableAT | null);
+    pack(builder: flatbuffers.Builder): flatbuffers.Offset;
+}

tests/ts/my-game/other-name-space/table-b.js

@@ -0,0 +1,64 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+import * as flatbuffers from 'flatbuffers';
+import { TableA } from '../../table-a.js';
+export class TableB {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    static getRootAsTableB(bb, obj) {
+        return (obj || new TableB()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    static getSizePrefixedRootAsTableB(bb, obj) {
+        bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+        return (obj || new TableB()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    a(obj) {
+        const offset = this.bb.__offset(this.bb_pos, 4);
+        return offset ? (obj || new TableA()).__init(this.bb.__indirect(this.bb_pos + offset), this.bb) : null;
+    }
+    static getFullyQualifiedName() {
+        return 'MyGame.OtherNameSpace.TableB';
+    }
+    static startTableB(builder) {
+        builder.startObject(1);
+    }
+    static addA(builder, aOffset) {
+        builder.addFieldOffset(0, aOffset, 0);
+    }
+    static endTableB(builder) {
+        const offset = builder.endObject();
+        return offset;
+    }
+    static createTableB(builder, aOffset) {
+        TableB.startTableB(builder);
+        TableB.addA(builder, aOffset);
+        return TableB.endTableB(builder);
+    }
+    serialize() {
+        return this.bb.bytes();
+    }
+    static deserialize(buffer) {
+        return TableB.getRootAsTableB(new flatbuffers.ByteBuffer(buffer));
+    }
+    unpack() {
+        return new TableBT((this.a() !== null ? this.a().unpack() : null));
+    }
+    unpackTo(_o) {
+        _o.a = (this.a() !== null ? this.a().unpack() : null);
+    }
+}
+export class TableBT {
+    constructor(a = null) {
+        this.a = a;
+    }
+    pack(builder) {
+        const a = (this.a !== null ? this.a.pack(builder) : 0);
+        return TableB.createTableB(builder, a);
+    }
+}

tests/ts/my-game/other-name-space/table-b.ts

@@ -0,0 +1,87 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+import { TableA, TableAT } from '../../table-a.js';
+
+
+export class TableB implements flatbuffers.IUnpackableObject<TableBT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):TableB {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsTableB(bb:flatbuffers.ByteBuffer, obj?:TableB):TableB {
+  return (obj || new TableB()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsTableB(bb:flatbuffers.ByteBuffer, obj?:TableB):TableB {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new TableB()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+a(obj?:TableA):TableA|null {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? (obj || new TableA()).__init(this.bb!.__indirect(this.bb_pos + offset), this.bb!) : null;
+}
+
+static getFullyQualifiedName():string {
+  return 'MyGame.OtherNameSpace.TableB';
+}
+
+static startTableB(builder:flatbuffers.Builder) {
+  builder.startObject(1);
+}
+
+static addA(builder:flatbuffers.Builder, aOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(0, aOffset, 0);
+}
+
+static endTableB(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createTableB(builder:flatbuffers.Builder, aOffset:flatbuffers.Offset):flatbuffers.Offset {
+  TableB.startTableB(builder);
+  TableB.addA(builder, aOffset);
+  return TableB.endTableB(builder);
+}
+
+serialize():Uint8Array {
+  return this.bb!.bytes();
+}
+
+static deserialize(buffer: Uint8Array):TableB {
+  return TableB.getRootAsTableB(new flatbuffers.ByteBuffer(buffer))
+}
+
+unpack(): TableBT {
+  return new TableBT(
+    (this.a() !== null ? this.a()!.unpack() : null)
+  );
+}
+
+
+unpackTo(_o: TableBT): void {
+  _o.a = (this.a() !== null ? this.a()!.unpack() : null);
+}
+}
+
+export class TableBT implements flatbuffers.IGeneratedObject {
+constructor(
+  public a: TableAT|null = null
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  const a = (this.a !== null ? this.a!.pack(builder) : 0);
+
+  return TableB.createTableB(builder,
+    a
+  );
+}
+}

tests/ts/my-game/other-name-space/unused.d.ts

@@ -0,0 +1,18 @@
+import * as flatbuffers from 'flatbuffers';
+export declare class Unused implements flatbuffers.IUnpackableObject<UnusedT> {
+    bb: flatbuffers.ByteBuffer | null;
+    bb_pos: number;
+    __init(i: number, bb: flatbuffers.ByteBuffer): Unused;
+    a(): number;
+    mutate_a(value: number): boolean;
+    static getFullyQualifiedName(): string;
+    static sizeOf(): number;
+    static createUnused(builder: flatbuffers.Builder, a: number): flatbuffers.Offset;
+    unpack(): UnusedT;
+    unpackTo(_o: UnusedT): void;
+}
+export declare class UnusedT implements flatbuffers.IGeneratedObject {
+    a: number;
+    constructor(a?: number);
+    pack(builder: flatbuffers.Builder): flatbuffers.Offset;
+}

tests/ts/my-game/other-name-space/unused.js

@@ -0,0 +1,44 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+export class Unused {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    a() {
+        return this.bb.readInt32(this.bb_pos);
+    }
+    mutate_a(value) {
+        this.bb.writeInt32(this.bb_pos + 0, value);
+        return true;
+    }
+    static getFullyQualifiedName() {
+        return 'MyGame.OtherNameSpace.Unused';
+    }
+    static sizeOf() {
+        return 4;
+    }
+    static createUnused(builder, a) {
+        builder.prep(4, 4);
+        builder.writeInt32(a);
+        return builder.offset();
+    }
+    unpack() {
+        return new UnusedT(this.a());
+    }
+    unpackTo(_o) {
+        _o.a = this.a();
+    }
+}
+export class UnusedT {
+    constructor(a = 0) {
+        this.a = a;
+    }
+    pack(builder) {
+        return Unused.createUnused(builder, this.a);
+    }
+}

tests/ts/my-game/other-name-space/unused.ts

@@ -0,0 +1,63 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class Unused implements flatbuffers.IUnpackableObject<UnusedT> {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):Unused {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+a():number {
+  return this.bb!.readInt32(this.bb_pos);
+}
+
+mutate_a(value:number):boolean {
+  this.bb!.writeInt32(this.bb_pos + 0, value);
+  return true;
+}
+
+static getFullyQualifiedName():string {
+  return 'MyGame.OtherNameSpace.Unused';
+}
+
+static sizeOf():number {
+  return 4;
+}
+
+static createUnused(builder:flatbuffers.Builder, a: number):flatbuffers.Offset {
+  builder.prep(4, 4);
+  builder.writeInt32(a);
+  return builder.offset();
+}
+
+
+unpack(): UnusedT {
+  return new UnusedT(
+    this.a()
+  );
+}
+
+
+unpackTo(_o: UnusedT): void {
+  _o.a = this.a();
+}
+}
+
+export class UnusedT implements flatbuffers.IGeneratedObject {
+constructor(
+  public a: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return Unused.createUnused(builder,
+    this.a
+  );
+}
+}