Rename `wasm2asm` to `wasm2js`, emit ESM by default (#1642)

* Rename the `wasm2asm` tool to `wasm2js`

This commit performs a relatively simple rename of the `wasm2asm` tool to
`wasm2js`. The functionality of the tool doesn't change just yet but it's
intended that we'll start generating an ES module instead of just an `asm.js`
function soon.

* wasm2js: Support `*.wasm` input files

Previously `wasm2js` only supported `*.wast` files but to make it a bit easier
to use in tooling pipelines this commit adds support for reading in a `*.wasm`
file directly. Determining which parser to use depends on the input filename,
where the binary parser is used with `*.wasm` files and the wast parser is used
for all other files.

* wasm2js: Emit ESM imports/exports by default

This commit alters the default behavior of `wasm2js` to emit an ESM by default,
either importing items from the environment or exporting. Items like
initialization of memory are also handled here.

1 files changed, 0 insertions, 101 deletions

diff --git a/src/tools/wasm2asm.cpp b/src/tools/wasm2asm.cpp
deleted file mode 100644
index fd65ca5e6..000000000
--- a/src/tools/wasm2asm.cpp
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- * Copyright 2015 WebAssembly Community Group participants
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-//
-// wasm2asm console tool
-//
-
-#include "support/colors.h"
-#include "support/command-line.h"
-#include "support/file.h"
-#include "wasm-s-parser.h"
-#include "wasm2asm.h"
-
-using namespace cashew;
-using namespace wasm;
-
-int main(int argc, const char *argv[]) {
-  Wasm2AsmBuilder::Flags builderFlags;
-  Options options("wasm2asm", "Transform .wast files to asm.js");
-  options
-      .add("--output", "-o", "Output file (stdout if not specified)",
-           Options::Arguments::One,
-           [](Options* o, const std::string& argument) {
-             o->extra["output"] = argument;
-             Colors::disable();
-           })
-      .add("--allow-asserts", "", "Allow compilation of .wast testing asserts",
-           Options::Arguments::Zero,
-           [&](Options* o, const std::string& argument) {
-             builderFlags.allowAsserts = true;
-             o->extra["asserts"] = "1";
-           })
-      .add("--pedantic", "", "Emulate WebAssembly trapping behavior",
-           Options::Arguments::Zero,
-           [&](Options* o, const std::string& argument) {
-             builderFlags.pedantic = true;
-           })
-      .add_positional("INFILE", Options::Arguments::One,
-                      [](Options *o, const std::string& argument) {
-                        o->extra["infile"] = argument;
-                      });
-  options.parse(argc, argv);
-  if (options.debug) builderFlags.debug = true;
-
-  auto input(
-      read_file<std::vector<char>>(options.extra["infile"], Flags::Text, options.debug ? Flags::Debug : Flags::Release));
-
-  Element* root;
-  Module wasm;
-  Ref asmjs;
-
-  try {
-    if (options.debug) std::cerr << "s-parsing..." << std::endl;
-    SExpressionParser parser(input.data());
-    root = parser.root;
-
-    if (options.debug) std::cerr << "w-parsing..." << std::endl;
-    SExpressionWasmBuilder builder(wasm, *(*root)[0]);
-
-    if (options.debug) std::cerr << "asming..." << std::endl;
-    Wasm2AsmBuilder wasm2asm(builderFlags);
-    asmjs = wasm2asm.processWasm(&wasm);
-
-    if (options.extra["asserts"] == "1") {
-      if (options.debug) std::cerr << "asserting..." << std::endl;
-      flattenAppend(asmjs, wasm2asm.processAsserts(&wasm, *root, builder));
-    }
-  } catch (ParseException& p) {
-    p.dump(std::cerr);
-    Fatal() << "error in parsing input";
-  } catch (std::bad_alloc&) {
-    Fatal() << "error in building module, std::bad_alloc (possibly invalid request for silly amounts of memory)";
-  }
-
-  if (options.debug) {
-    std::cerr << "a-printing..." << std::endl;
-    asmjs->stringify(std::cout, true);
-    std::cout << '\n';
-  }
-
-  if (options.debug) std::cerr << "j-printing..." << std::endl;
-  JSPrinter jser(true, true, asmjs);
-  jser.printAst();
-  Output output(options.extra["output"], Flags::Text, options.debug ? Flags::Debug : Flags::Release);
-  output << jser.buffer << std::endl;
-
-  if (options.debug) std::cerr << "done." << std::endl;
-}