fix: Package name collisions

src/compile.ts

@@ -1,14 +1,17 @@
 import * as fs from 'fs-extra';
 import * as path from 'path';
-import { exec } from './util';
+import { exec, validateOptions } from './util';
 import { Options } from './options';
+import * as crypto from 'crypto';
 
 const compilerModule = require.resolve('jsii/bin/jsii');
 
 /**
  * Compiles the source files in `workdir` with jsii.
  */
 export async function compile(workdir: string, options: Options) {
+  validateOptions(options);
+
   const args = [ '--silence-warnings', 'reserved-word' ];
   const entrypoint = options.entrypoint ?? 'index.ts';
 
@@ -23,6 +26,8 @@ export async function compile(workdir: string, options: Options) {
   // path to entrypoint without extension
   const basepath = path.join(path.dirname(entrypoint), path.basename(entrypoint, '.ts'));
 
+  const moduleKey = options.moduleKey?.replace(/\./g, '').replace(/\//g, '') ?? crypto.createHash('sha256').update(basepath, 'utf8').digest('hex');
+
   // jsii modules to include
   const moduleDirs = options.deps ?? [];
 
@@ -46,9 +51,8 @@ export async function compile(workdir: string, options: Options) {
     }
   }
 
-
   const pkg = {
-    name: 'generated',
+    name: moduleKey,
     version: '0.0.0',
     author: 'generated@generated.com',
     main: `${basepath}.js`,

src/options.ts

@@ -18,6 +18,15 @@ export interface Options {
    */
   jsii?: JsiiOutputOptions;
 
+  /**
+   * Key for the module to prevent JSII collisions.
+   * 
+   * Use your own if it's project-unique, otherwise use default.
+   * 
+   * @default - hash of the basepath to the module
+   */
+  moduleKey?: string
+
   /**
    * Produce python code.
    * @default - python is not generated
@@ -47,6 +56,9 @@ export interface PythonOutputOptions {
 
   /**
    * The name of the the python module to generate.
+   * 
+   * This must follow the standard Python module name conventions.
+   * For example, it cannot include a hyphen ('-')
    */
   moduleName: string;
 }
@@ -59,6 +71,9 @@ export interface JavaOutputOptions {
 
   /**
    * The name of the java package to generate
+   * 
+   * This must follow standard Java package conventions.
+   * For example, it cannot include a hyphen ('-')
    */
   package: string;
 }

src/util.ts

@@ -2,6 +2,7 @@ import * as fs from 'fs-extra';
 import * as path from 'path';
 import * as os from 'os';
 import { spawn, SpawnOptions } from 'child_process';
+import { Options } from './options';
 
 export async function mkdtemp(closure: (dir: string) => Promise<void>) {
   const workdir = await fs.mkdtemp(path.join(os.tmpdir(), 'temp-'));
@@ -55,3 +56,20 @@ export async function exec(moduleName: string, args: string[] = [], options: Spa
     });
   });
 }
+
+/**
+ * This validates that the Python module name and Java package name
+ * conform to language-specific constraints.
+ * 
+ * @param options Options set by the consumer
+ * @throws error if options do not conform
+ */
+export function validateOptions(options: Options) {
+  if (options.python?.moduleName.includes('-')) {
+    throw new Error(`Python moduleName [${options.python.moduleName}] may not contain "-"`);
+  }
+
+  if (options.java?.package.includes('-')) {
+    throw new Error(`Java package [${options.java.package}] may not contain "-"`);
+  }
+}

test/__snapshots__/cli.test.ts.snap

@@ -45,7 +45,7 @@ public final class $Module extends JsiiModule {
     private final Map<String, Class<?>> cache = new HashMap<>();
 
     public $Module() {
-        super(\\"generated\\", \\"0.0.0\\", $Module.class, \\"generated@0.0.0.jsii.tgz\\");
+        super(\\"4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060\\", \\"0.0.0\\", $Module.class, \\"4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060@0.0.0.jsii.tgz\\");
     }
 
     @Override
@@ -76,7 +76,7 @@ public final class $Module extends JsiiModule {
  * A sophisticaed multi-language calculator.
  */
 
-@software.amazon.jsii.Jsii(module = mypackage.$Module.class, fqn = \\"generated.Calculator\\")
+@software.amazon.jsii.Jsii(module = mypackage.$Module.class, fqn = \\"4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Calculator\\")
 public class Calculator extends software.amazon.jsii.JsiiObject {
 
     protected Calculator(final software.amazon.jsii.JsiiObjectRef objRef) {
@@ -126,7 +126,7 @@ public class Calculator extends software.amazon.jsii.JsiiObject {
  * Math operands.
  */
 
-@software.amazon.jsii.Jsii(module = mypackage.$Module.class, fqn = \\"generated.Operands\\")
+@software.amazon.jsii.Jsii(module = mypackage.$Module.class, fqn = \\"4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Operands\\")
 @software.amazon.jsii.Jsii.Proxy(Operands.Jsii$Proxy.class)
 public interface Operands extends software.amazon.jsii.JsiiSerializable {
 
@@ -229,7 +229,7 @@ public interface Operands extends software.amazon.jsii.JsiiSerializable {
             data.set(\\"rhs\\", om.valueToTree(this.getRhs()));
 
             final com.fasterxml.jackson.databind.node.ObjectNode struct = com.fasterxml.jackson.databind.node.JsonNodeFactory.instance.objectNode();
-            struct.set(\\"fqn\\", om.valueToTree(\\"generated.Operands\\"));
+            struct.set(\\"fqn\\", om.valueToTree(\\"4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Operands\\"));
             struct.set(\\"data\\", data);
 
             final com.fasterxml.jackson.databind.node.ObjectNode obj = com.fasterxml.jackson.databind.node.JsonNodeFactory.instance.objectNode();
@@ -258,8 +258,8 @@ public interface Operands extends software.amazon.jsii.JsiiSerializable {
     }
 }
 ",
-  "src/main/resources/mypackage/$Module.txt": "generated.Calculator=mypackage.Calculator
-generated.Operands=mypackage.Operands
+  "src/main/resources/mypackage/$Module.txt": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Calculator=mypackage.Calculator
+4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Operands=mypackage.Operands
 ",
 }
 `;
@@ -272,29 +272,29 @@ Object {
       "author",
     ],
   },
-  "description": "generated",
-  "fingerprint": "+fSgo9PQwFAKmX2JcaRILwTXE/p1H1bq+QKuOREAfuE=",
+  "description": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060",
+  "fingerprint": "64TWv4C2KsEvkRVfUjD1gQTbNC2rsTlISDNv4F9JUw0=",
   "homepage": "http://generated",
   "jsiiVersion": "1.6.0 (build 248e75b)",
   "license": "Apache-2.0",
-  "name": "generated",
+  "name": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060",
   "repository": Object {
     "type": "git",
     "url": "http://generated",
   },
   "schema": "jsii/0.10.0",
   "targets": Object {
     "js": Object {
-      "npm": "generated",
+      "npm": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060",
     },
   },
   "types": Object {
-    "generated.Calculator": Object {
-      "assembly": "generated",
+    "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Calculator": Object {
+      "assembly": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060",
       "docs": Object {
         "summary": "A sophisticaed multi-language calculator.",
       },
-      "fqn": "generated.Calculator",
+      "fqn": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Calculator",
       "initializer": Object {},
       "kind": "class",
       "locationInModule": Object {
@@ -318,7 +318,7 @@ Object {
               },
               "name": "ops",
               "type": Object {
-                "fqn": "generated.Operands",
+                "fqn": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Operands",
               },
             },
           ],
@@ -344,7 +344,7 @@ Object {
               },
               "name": "ops",
               "type": Object {
-                "fqn": "generated.Operands",
+                "fqn": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Operands",
               },
             },
           ],
@@ -370,7 +370,7 @@ Object {
               },
               "name": "ops",
               "type": Object {
-                "fqn": "generated.Operands",
+                "fqn": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Operands",
               },
             },
           ],
@@ -383,13 +383,13 @@ Object {
       ],
       "name": "Calculator",
     },
-    "generated.Operands": Object {
-      "assembly": "generated",
+    "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Operands": Object {
+      "assembly": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060",
       "datatype": true,
       "docs": Object {
         "summary": "Math operands.",
       },
-      "fqn": "generated.Operands",
+      "fqn": "4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Operands",
       "kind": "interface",
       "locationInModule": Object {
         "filename": "lib/main.ts",
@@ -449,7 +449,7 @@ import publication
 from ._jsii import *
 
 
-class Calculator(metaclass=jsii.JSIIMeta, jsii_type=\\"generated.Calculator\\"):
+class Calculator(metaclass=jsii.JSIIMeta, jsii_type=\\"4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Calculator\\"):
     \\"\\"\\"A sophisticaed multi-language calculator.\\"\\"\\"
     def __init__(self) -> None:
         jsii.create(Calculator, self, [])
@@ -488,7 +488,7 @@ class Calculator(metaclass=jsii.JSIIMeta, jsii_type=\\"generated.Calculator\\"):
         return jsii.invoke(self, \\"sub\\", [ops])
 
 
-@jsii.data_type(jsii_type=\\"generated.Operands\\", jsii_struct_bases=[], name_mapping={'lhs': 'lhs', 'rhs': 'rhs'})
+@jsii.data_type(jsii_type=\\"4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060.Operands\\", jsii_struct_bases=[], name_mapping={'lhs': 'lhs', 'rhs': 'rhs'})
 class Operands():
     def __init__(self, *, lhs: jsii.Number, rhs: jsii.Number) -> None:
         \\"\\"\\"Math operands.
@@ -538,7 +538,7 @@ import jsii
 import jsii.compat
 import publication
 
-__jsii_assembly__ = jsii.JSIIAssembly.load(\\"generated\\", \\"0.0.0\\", __name__[0:-6], \\"generated@0.0.0.jsii.tgz\\")
+__jsii_assembly__ = jsii.JSIIAssembly.load(\\"4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060\\", \\"0.0.0\\", __name__[0:-6], \\"4c6b576fbe7e27053874813d9754cb2e46811d806c1e0aa9aae8add4c3763060@0.0.0.jsii.tgz\\")
 
 __all__ = [
     \\"__jsii_assembly__\\",

test/__snapshots__/srcmak.test.ts.snap

@@ -45,7 +45,7 @@ public final class $Module extends JsiiModule {
     private final Map<String, Class<?>> cache = new HashMap<>();
 
     public $Module() {
-        super(\\"generated\\", \\"0.0.0\\", $Module.class, \\"generated@0.0.0.jsii.tgz\\");
+        super(\\"javapackage\\", \\"0.0.0\\", $Module.class, \\"javapackage@0.0.0.jsii.tgz\\");
     }
 
     @Override
@@ -73,7 +73,7 @@ public final class $Module extends JsiiModule {
   "src/main/java/hello/world/Hello.java": "package hello.world;
 
 
-@software.amazon.jsii.Jsii(module = hello.world.$Module.class, fqn = \\"generated.Hello\\")
+@software.amazon.jsii.Jsii(module = hello.world.$Module.class, fqn = \\"javapackage.Hello\\")
 public class Hello extends software.amazon.jsii.JsiiObject {
 
     protected Hello(final software.amazon.jsii.JsiiObjectRef objRef) {
@@ -97,7 +97,7 @@ public class Hello extends software.amazon.jsii.JsiiObject {
   "src/main/java/hello/world/Operands.java": "package hello.world;
 
 
-@software.amazon.jsii.Jsii(module = hello.world.$Module.class, fqn = \\"generated.Operands\\")
+@software.amazon.jsii.Jsii(module = hello.world.$Module.class, fqn = \\"javapackage.Operands\\")
 @software.amazon.jsii.Jsii.Proxy(Operands.Jsii$Proxy.class)
 public interface Operands extends software.amazon.jsii.JsiiSerializable {
 
@@ -194,7 +194,7 @@ public interface Operands extends software.amazon.jsii.JsiiSerializable {
             data.set(\\"rhs\\", om.valueToTree(this.getRhs()));
 
             final com.fasterxml.jackson.databind.node.ObjectNode struct = com.fasterxml.jackson.databind.node.JsonNodeFactory.instance.objectNode();
-            struct.set(\\"fqn\\", om.valueToTree(\\"generated.Operands\\"));
+            struct.set(\\"fqn\\", om.valueToTree(\\"javapackage.Operands\\"));
             struct.set(\\"data\\", data);
 
             final com.fasterxml.jackson.databind.node.ObjectNode obj = com.fasterxml.jackson.databind.node.JsonNodeFactory.instance.objectNode();
@@ -223,8 +223,8 @@ public interface Operands extends software.amazon.jsii.JsiiSerializable {
     }
 }
 ",
-  "src/main/resources/hello/world/$Module.txt": "generated.Hello=hello.world.Hello
-generated.Operands=hello.world.Operands
+  "src/main/resources/hello/world/$Module.txt": "javapackage.Hello=hello.world.Hello
+javapackage.Operands=hello.world.Operands
 ",
 }
 `;
@@ -237,26 +237,26 @@ Object {
       "author",
     ],
   },
-  "description": "generated",
-  "fingerprint": "cNtb65kyZQOiBulmzr+bs6dCGdv4uhea1tFTkbRGJTw=",
+  "description": "1bc04b5291c26a46d918139138b992d2de976d6851d0893b0476b85bfbdfc6e6",
+  "fingerprint": "i19np+HVFMpwiHENNJeGk6AC3MVvpkkG7VtDtf9ouXs=",
   "homepage": "http://generated",
   "jsiiVersion": "1.6.0 (build 248e75b)",
   "license": "Apache-2.0",
-  "name": "generated",
+  "name": "1bc04b5291c26a46d918139138b992d2de976d6851d0893b0476b85bfbdfc6e6",
   "repository": Object {
     "type": "git",
     "url": "http://generated",
   },
   "schema": "jsii/0.10.0",
   "targets": Object {
     "js": Object {
-      "npm": "generated",
+      "npm": "1bc04b5291c26a46d918139138b992d2de976d6851d0893b0476b85bfbdfc6e6",
     },
   },
   "types": Object {
-    "generated.Foo": Object {
-      "assembly": "generated",
-      "fqn": "generated.Foo",
+    "1bc04b5291c26a46d918139138b992d2de976d6851d0893b0476b85bfbdfc6e6.Foo": Object {
+      "assembly": "1bc04b5291c26a46d918139138b992d2de976d6851d0893b0476b85bfbdfc6e6",
+      "fqn": "1bc04b5291c26a46d918139138b992d2de976d6851d0893b0476b85bfbdfc6e6.Foo",
       "initializer": Object {},
       "kind": "class",
       "locationInModule": Object {
@@ -300,7 +300,7 @@ import publication
 from ._jsii import *
 
 
-class Hello(metaclass=jsii.JSIIMeta, jsii_type=\\"generated.Hello\\"):
+class Hello(metaclass=jsii.JSIIMeta, jsii_type=\\"pythonpackage.Hello\\"):
     def __init__(self) -> None:
         jsii.create(Hello, self, [])
 
@@ -315,7 +315,7 @@ class Hello(metaclass=jsii.JSIIMeta, jsii_type=\\"generated.Hello\\"):
         return jsii.invoke(self, \\"add\\", [ops])
 
 
-@jsii.data_type(jsii_type=\\"generated.Operands\\", jsii_struct_bases=[], name_mapping={'lhs': 'lhs', 'rhs': 'rhs'})
+@jsii.data_type(jsii_type=\\"pythonpackage.Operands\\", jsii_struct_bases=[], name_mapping={'lhs': 'lhs', 'rhs': 'rhs'})
 class Operands():
     def __init__(self, *, lhs: jsii.Number, rhs: jsii.Number) -> None:
         \\"\\"\\"
@@ -362,7 +362,7 @@ import jsii
 import jsii.compat
 import publication
 
-__jsii_assembly__ = jsii.JSIIAssembly.load(\\"generated\\", \\"0.0.0\\", __name__[0:-6], \\"generated@0.0.0.jsii.tgz\\")
+__jsii_assembly__ = jsii.JSIIAssembly.load(\\"pythonpackage\\", \\"0.0.0\\", __name__[0:-6], \\"pythonpackage@0.0.0.jsii.tgz\\")
 
 __all__ = [
     \\"__jsii_assembly__\\",

test/cli.test.ts

@@ -74,7 +74,7 @@ test('python output', async () => {
     );
 
     expect(await snapshotDirectory(outdir, {
-      excludeFiles: [ 'generated@0.0.0.jsii.tgz' ],
+      excludeFiles: [ '@0.0.0.jsii.tgz' ],
     })).toMatchSnapshot();
   });
 });
@@ -92,7 +92,7 @@ test('java output', async () => {
 
     expect(await snapshotDirectory(outdir, {
       excludeLines: [ /.*@javax.annotation.Generated.*/ ],
-      excludeFiles: [ 'generated@0.0.0.jsii.tgz' ],
+      excludeFiles: [ '@0.0.0.jsii.tgz' ],
     })).toMatchSnapshot();
   });
 });