Set up J2CL JavaScript build (#64)

.gitignore

@@ -12,3 +12,7 @@ tmp/
 .bloop/
 .metals/
 project/metals.sbt
+bazel-bin
+bazel-dhallj
+bazel-out
+bazel-testlogs

WORKSPACE

@@ -0,0 +1,18 @@
+workspace(name = "org_dhallj")
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+# Load j2cl repository
+http_archive(
+    name = "com_google_j2cl",
+    strip_prefix = "j2cl-master",
+    url = "https://github.com/google/j2cl/archive/master.zip",
+)
+
+load("@com_google_j2cl//build_defs:repository.bzl", "load_j2cl_repo_deps")
+
+load_j2cl_repo_deps()
+
+load("@com_google_j2cl//build_defs:rules.bzl", "setup_j2cl_workspace")
+
+setup_j2cl_workspace()

javascript/BUILD

@@ -0,0 +1,9 @@
+load("@com_google_j2cl//build_defs:rules.bzl", "j2cl_application")
+
+j2cl_application(
+    name = "dhall",
+    closure_defines = {"jre.classMetadata": "'STRIPPED'"},
+    entry_points = ["dhall.js"],
+    jre_checks_check_level = "MINIMAL",
+    deps = ["//javascript/api:dhall_js"],
+)

javascript/api/BUILD

@@ -0,0 +1,21 @@
+load("@io_bazel_rules_closure//closure:defs.bzl", "closure_js_library")
+load("@com_google_j2cl//build_defs:rules.bzl", "j2cl_library")
+
+package(
+    default_visibility = ["//visibility:public"],
+)
+
+j2cl_library(
+    name = "dhall_js_java",
+    srcs = ["DhallJs.java"],
+    deps = [
+        "//modules/core",
+        "//modules/parser",
+    ],
+)
+
+closure_js_library(
+    name = "dhall_js",
+    srcs = ["dhall.js"],
+    deps = [":dhall_js_java"],
+)

javascript/api/DhallJs.java

@@ -0,0 +1,20 @@
+package org.dhallj.js;
+
+import org.dhallj.core.Expr;
+import org.dhallj.parser.DhallParser;
+import jsinterop.annotations.JsType;
+
+@JsType
+public class DhallJs {
+  public static String parse(String input) {
+    return DhallParser.parse(input).toString();
+  }
+
+  public static String normalize(String input) {
+    return DhallParser.parse(input).normalize().toString();
+  }
+
+  public static String typeCheck(String input) {
+    return Expr.Util.typeCheck(DhallParser.parse(input)).toString();
+  }
+}

javascript/api/dhall.js

@@ -0,0 +1,36 @@
+goog.module('dhall.js');
+
+var DhallJs = goog.require('org.dhallj.js.DhallJs');
+
+/**
+ * @param {string} input
+ * @return {null|string}
+ */
+function parse(input) {
+  return DhallJs.parse(input);
+}
+
+/**
+ * @param {string} input
+ * @return {null|string}
+ */
+function typeCheck(input) {
+  return DhallJs.typeCheck(input);
+}
+
+/**
+ * @param {string} input
+ * @return {null|string}
+ */
+function normalize(input) {
+  return DhallJs.normalize(input);
+}
+
+// Otherwise we seem to lose stuff with some configurations?
+parse("1");
+typeCheck("1");
+normalize("1");
+
+goog.exportSymbol("parse", parse);
+goog.exportSymbol("typeCheck", typeCheck);
+goog.exportSymbol("normalize", normalize);

javascript/jre/BUILD

@@ -0,0 +1,30 @@
+load("@com_google_j2cl//build_defs:rules.bzl", "j2cl_library")
+
+package(
+    default_visibility = ["//visibility:public"],
+)
+
+j2cl_library(
+    name = "java_io",
+    srcs = [
+        "BufferedReader.java",
+        "InputStreamReader.java",
+    ],
+)
+
+j2cl_library(
+    name = "java_net",
+    srcs = [
+        "URI.java",
+        "URISyntaxException.java",
+    ],
+)
+
+j2cl_library(
+    name = "java_nio_file",
+    srcs = [
+        "InvalidPathException.java",
+        "Path.java",
+        "Paths.java",
+    ],
+)

javascript/jre/BufferedReader.java

@@ -0,0 +1,11 @@
+package java.io;
+
+public class BufferedReader extends Reader {
+  public BufferedReader(InputStreamReader stream) {}
+
+  public int read(char[] cbuf, int off, int len) {
+    return -1;
+  }
+
+  public void close() {}
+}

javascript/jre/InputStreamReader.java

@@ -0,0 +1,11 @@
+package java.io;
+
+public class InputStreamReader extends Reader {
+  public InputStreamReader(InputStream in) {}
+  public InputStreamReader(InputStream in, String charsetName) {}
+  public int read(char[] cbuf, int off, int len) {
+    return -1;
+  }
+
+  public void close() {}
+}

javascript/jre/InvalidPathException.java

@@ -0,0 +1,3 @@
+package java.nio.file;
+
+public class InvalidPathException extends IllegalArgumentException {}

javascript/jre/Path.java

@@ -0,0 +1,27 @@
+package java.nio.file;
+
+import java.util.Iterator;
+
+public class Path {
+  private final String input;
+
+  public Path(String input) {
+    this.input = input;
+  }
+
+  public final boolean isAbsolute() {
+    return this.input.charAt(0) == '/';
+  }
+
+  public final Iterator<Path> iterator() {
+    return null;
+  }
+
+  public final int getNameCount() {
+    return 0;
+  }
+
+  public Path resolve(String other) {
+    return this;
+  }
+}

javascript/jre/Paths.java

@@ -0,0 +1,11 @@
+package java.nio.file;
+
+public class Paths {
+  /**
+   * @throws  InvalidPathException
+   *          if the path string cannot be converted to a {@code Path}
+   */
+  public static final Path get(String input) {
+    return new Path(input);
+  }
+}

javascript/jre/URI.java

@@ -0,0 +1,25 @@
+package java.net;
+
+public class URI {
+  private final String input;
+
+  public URI(String input) throws URISyntaxException {
+    this.input = input;
+  }
+
+  public final String getScheme() {
+    return "";
+  }
+
+  public final String getAuthority() {
+    return "";
+  }
+
+  public final String getPath() {
+    return "";
+  }
+
+  public final String getQuery() {
+    return "";
+  }
+}

javascript/jre/URISyntaxException.java

@@ -0,0 +1,3 @@
+package java.net;
+
+public class URISyntaxException extends Throwable {}

modules/core/BUILD

@@ -0,0 +1,27 @@
+load("@com_google_j2cl//build_defs:rules.bzl", "j2cl_library")
+
+package(
+    default_visibility = ["//visibility:public"],
+)
+
+j2cl_library(
+    name = "cbor",
+    srcs = glob([
+        "src/main/java/org/dhallj/cbor/*.java",
+    ]),
+)
+
+j2cl_library(
+    name = "core",
+    srcs = glob([
+        "src/main/java/org/dhallj/core/*.java",
+        "src/main/java/org/dhallj/core/binary/*.java",
+        "src/main/java/org/dhallj/core/normalization/*.java",
+        "src/main/java/org/dhallj/core/typechecking/*.java",
+    ]),
+    deps = [
+        ":cbor",
+        "//javascript/jre:java_net",
+        "//javascript/jre:java_nio_file",
+    ],
+)

modules/parser/BUILD

@@ -0,0 +1,20 @@
+load("@com_google_j2cl//build_defs:rules.bzl", "j2cl_library")
+
+package(
+    default_visibility = ["//visibility:public"],
+)
+
+j2cl_library(
+    name = "parser",
+    srcs = glob([
+        "src/main/java/org/dhallj/parser/*.java",
+        "src/main/java/org/dhallj/parser/support/*.java",
+        "target/javacc/*.java",
+    ]),
+    deps = [
+        "//javascript/jre:java_io",
+        "//javascript/jre:java_net",
+        "//javascript/jre:java_nio_file",
+        "//modules/core",
+    ],
+)