Add licenses as prefixes to output bundles

cli/vm/compile.ts

@@ -45,7 +45,7 @@ export function compile(compileConfig: dataform.ICompileConfig) {
     vmIndexFileName,
     'return require("@dataform/core").version || "0.0.0"'
   );
-  if (semver.lt(dataformCoreVersion, "3.0.0")) {
+  if (semver.lt(dataformCoreVersion, "3.0.0-alpha.0")) {
     throw new Error("@dataform/core ^3.0.0 required.");
   }
 

packages/@dataform/cli/BUILD

@@ -1,6 +1,6 @@
 load("//tools:ts_library.bzl", "ts_library")
 load("//:version.bzl", "DF_VERSION")
-load("//packages:index.bzl", "pkg_bundle", "pkg_json", "pkg_npm_tar")
+load("//packages:index.bzl", "LICENSE_HEADER", "add_license_header_to_file", "pkg_bundle", "pkg_json", "pkg_npm_tar")
 
 package(default_visibility = ["//visibility:public"])
 
@@ -65,9 +65,9 @@ pkg_json(
 
 pkg_bundle(
     name = "bundle",
-    args = ["--banner='#!/usr/bin/env node'"],
-    entry_point = "index.ts",
     allow_node_builtins = True,
+    args = ["--banner='#!/usr/bin/env node\n" + LICENSE_HEADER + "'"],
+    entry_point = "index.ts",
     externals = externals,
     deps = [
         ":cli",
@@ -76,9 +76,9 @@ pkg_bundle(
 
 pkg_bundle(
     name = "worker_bundle",
-    args = ["--banner='#!/usr/bin/env node'"],
-    entry_point = "worker.ts",
     allow_node_builtins = True,
+    args = ["--banner='#!/usr/bin/env node\n" + LICENSE_HEADER + "'"],
+    entry_point = "worker.ts",
     externals = externals,
     deps = [
         ":cli",
@@ -91,5 +91,6 @@ pkg_npm_tar(
         ":bundle",
         ":package.json",
         ":worker_bundle",
+
     ],
 )

packages/@dataform/core/BUILD

@@ -1,6 +1,6 @@
 load("//tools:ts_library.bzl", "ts_library")
 load("//:version.bzl", "DF_VERSION")
-load("//packages:index.bzl", "pkg_bundle", "pkg_bundle_dts", "pkg_json", "pkg_npm_tar")
+load("//packages:index.bzl", "pkg_json", "pkg_npm_tar", "add_license_header_to_file")
 load("//tools/common:copy.bzl", "copy_file")
 
 package(default_visibility = ["//visibility:public"])
@@ -29,11 +29,11 @@ load("@build_bazel_rules_nodejs//:index.bzl", "npm_package_bin")
 npm_package_bin(
     name = "bundle",
     outs = [
-        "bundle.js",
+        "bundle_no_license.js",
     ],
     args = [
         "--config=$(location webpack.config.js)",
-        "--output=$(location bundle.js)",
+        "--output=$(location bundle_no_license.js)",
         "--mode=production"
     ],
     data = [
@@ -55,17 +55,23 @@ pkg_json(
     version = DF_VERSION,
 )
 
-copy_file(
-    name = "core_proto",
-    src = "//protos:core.proto",
-    out = "core.proto",
+add_license_header_to_file(
+    name="core_proto_with_license",
+    from_file="//protos:core.proto",
+    to_file="core.proto",
+)
+
+add_license_header_to_file(
+    name="bundle_with_license",
+    from_file="bundle",
+    to_file="bundle.js",
 )
 
 pkg_npm_tar(
     name = "package",
     deps = [
-        ":bundle",
+        ":bundle_with_license",
         ":package.json",
-        ":core.proto",
+        ":core_proto_with_license",
     ],
 )

packages/index.bzl

@@ -67,3 +67,34 @@ def pkg_npm_tar(name, srcs = [], deps = []):
         cmd = "tar -cvzf $(location {name}.tgz) -C $(location :{name})/.. --dereference {name}"
             .format(name = name),
     )
+
+LICENSE_HEADER = """// Copyright 2023 Google LLC
+//
+// 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.
+"""
+
+def add_license_header_to_file(name, from_file, to_file):
+    """
+    Adds the Apache 2.0 license header to a file. This is not done in-place because Bazel requires
+    separate output and input files.
+    """
+    native.genrule(
+        name=name,
+        srcs=[from_file],
+        outs=[to_file],
+        cmd=(
+            (
+                "echo '{license_header}' | cat - $(location {from_file}) > $(location {to_file})"
+            ).format(from_file=from_file, to_file=to_file, license_header=LICENSE_HEADER)
+        ),
+    )

version.bzl

@@ -1,3 +1,3 @@
 # NOTE: If you change the format of this line, you must change the bash command
 # in /scripts/publish to extract the version string correctly.
-DF_VERSION = "3.0.0"
+DF_VERSION = "3.0.0-alpha.0"