Merge pull request #12 from pubref/java_jars

Add java_deps attribute to kotlin_compile rule.

Author: pcj

README.md

@@ -19,7 +19,7 @@ Add the following to your WORKSPACE file:
 git_repository(
     name = "org_pubref_rules_kotlin",
     remote = "https://github.com/pubref/rules_kotlin.git",
-    tag = "v0.2", # update as needed
+    tag = "v0.2.2", # update as needed
 )
 load("@org_pubref_rules_kotlin//kotlin:rules.bzl", "kotlin_repositories")
 kotlin_repositories()
@@ -56,7 +56,7 @@ kotlin_library(
     name = "my_kotlin_lib",
     srcs = ["kotlin_source_file.kt"],
     deps = [":some_other_kotlin_library_rule"],
-    java_deps = [":some_other_java_library_rule"],
+    java_deps = [":some_other_java_library_rule", "@another_maven_jar//jar"],
 )
 ```
 
@@ -98,7 +98,7 @@ android_binary(
 | --- | --- | --- |
 | `srcs` | `label_list` | Kotlin source files `*.kt` |
 | `deps` | `label_list` | List of `kotlin_library` targets |
-| `java_deps` | `label_list` | List of java provider targets (`java_library`, `java_import`) |
+| `java_deps` | `label_list` | List of java provider targets (`java_library`, `java_import`, `...`) |
 | `jars` | `label_list` | List of jar file targets (`*.jar`) |
 | `x_opts` | `string_list` | List of additional `-X` options to `kotlinc` |
 | `plugin_opts` | `string_dict` | List of additional `-P` options to `kotlinc` |

WORKSPACE

@@ -12,3 +12,9 @@ maven_jar(
     artifact = "io.reactivex:rxjava:jar:1.2.1",
     #sha1 = "ssa",
 )
+
+# Used to demonstrate/test maven dependencies
+maven_jar(
+    name = "com_google_guava_guava_21_0",
+    artifact = "com.google.guava:guava:jar:21.0",
+)

examples/helloworld/BUILD

@@ -10,15 +10,21 @@ kotlin_binary(
     main_class = "examples.helloworld.MainKt",
     srcs = ["main.kt"],
     deps = [":rules"],
-    java_deps = [":milk"]
+    java_deps = [
+        ":milk",
+        ":guava",
+    ],
 )
 
 # A java rule that depends on a kotlin rule (using kotlin within traditional java)
 java_binary(
     name = "main_java",
     main_class = "examples.helloworld.Main",
     srcs = ["Main.java"],
-    deps = [":rules_kt"],
+    deps = [
+        ":rules_kt",
+        ":guava",
+    ],
 )
 
 # A simple kotlin rule that defines "data classes"
@@ -45,3 +51,11 @@ java_test(
         "@junit4//jar",
     ]
 )
+
+# Included to test dependent java providers
+java_library(
+    name = "guava",
+    exports = [
+        "@com_google_guava_guava_21_0//jar",
+    ],
+)

examples/helloworld/Main.java

@@ -1,8 +1,10 @@
 package examples.helloworld;
 
+import com.google.common.base.Joiner;
 // Not actually a necessary import since both in same package
 import examples.helloworld.KotlinLibraryRule;
 
+
 public class Main {
 
   public static void main(String[] args) {

examples/helloworld/main.kt

@@ -1,9 +1,10 @@
 package examples.helloworld
 
+import com.google.common.base.Joiner
 import examples.helloworld.SoyMilk
 
 fun main(args : Array<String>) {
-	println("I am Kotlin!......")
-	println("... But what is soy milk?")
+	println(Joiner.on(' ').join(arrayOf("I", "am", "Kotlin!", "......")))
+	println(Joiner.on(' ').join(arrayOf("...", "But", "what", "is", "soy", "milk?")))
 	println(SoyMilk())
 }

kotlin/rules.bzl

@@ -18,26 +18,38 @@ def _kotlin_compile_impl(ctx):
         args += ["-P"]
         args += ["plugin:%s=\"%s\"" % (k, v)]
 
-    # Make classpath if needed.  Include those from this rule and from
-    # dependent rules.
-    jars = [] + ctx.attr.jars
+    # Make classpath if needed.  Include those from this and dependent rules.
+    jars = []
+
+    # Populate from (transitive) java dependencies
+    for dep in ctx.attr.java_deps:
+        # Add-in all source and generated jar files
+        for file in dep.files:
+            jars.append(file)
+        # Add-in transitive dependencies
+        for file in dep.java.transitive_deps:
+            jars.append(file)
+
+    # Populate from (transitive) kotlin dependencies
     for dep in ctx.attr.deps:
-        jars += [jar.files for jar in dep.kt.transitive_jars]
+        jars += [file for file in dep.kt.transitive_jars]
+
+    # Populate from jar dependencies
+    for fileset in ctx.attr.jars:
+        # The fileset object is either a ConfiguredTarget OR a depset.
+        files = getattr(fileset, 'files', None)
+        if files:
+            for file in files:
+                jars += [file]
+        else:
+            for file in fileset:
+                jars += [file]
+
     if jars:
-        jarfiles = []
-        for fileset in jars:
-            # The fileset object is either a ConfiguredTarget OR a depset.
-            files = getattr(fileset, 'files', None)
-            if files:
-                for file in files:
-                    jarfiles += [file.path]
-                    inputs += [file]
-            else:
-                for file in fileset:
-                    jarfiles += [file.path]
-                    inputs += [file]
-        classpath = ":".join(jarfiles)
-        args += ["-cp", classpath]
+        # De-duplicate
+        jarsetlist = list(set(jars))
+        args += ["-cp", ":".join([file.path for file in jarsetlist])]
+        inputs += jarsetlist
 
     # Need to traverse back up to execroot, then down again
     kotlin_home = ctx.executable._kotlinc.dirname \
@@ -66,7 +78,7 @@ def _kotlin_compile_impl(ctx):
         kt = struct(
             srcs = ctx.attr.srcs,
             jar = kt_jar,
-            transitive_jars = jars,
+            transitive_jars = [kt_jar] + jars,
             home = kotlin_home,
         ),
     )
@@ -91,13 +103,18 @@ _kotlin_compile_attrs = {
         providers = ["kt"],
     ),
 
+    # Dependent java rules.
+    "java_deps": attr.label_list(
+        providers = ["java"],
+    ),
+
     # Not really implemented yet.
     "data": attr.label_list(
         allow_files = True,
         cfg = 'data',
     ),
 
-    # Jars to put on the kotlinc classpath
+    # Additional jar files to put on the kotlinc classpath
     "jars": attr.label_list(
         allow_files = jar_filetype,
     ),
@@ -135,24 +152,12 @@ kotlin_compile = rule(
 )
 
 
-def _make_jars_list_from_java_deps(deps = []):
-    jars = []
-    for dep in deps:
-        path = ""
-        basename = dep
-        if dep.find(":") >= 0:
-            parts = dep.split(':')
-            path = parts[0] if len(parts) > 0 else ""
-            basename = parts[1]
-        jars.append("%s:lib%s.jar" % (path, basename))
-    return jars
-
-
 def kotlin_library(name, jars = [], java_deps = [], **kwargs):
 
     kotlin_compile(
         name = name,
-        jars = jars + _make_jars_list_from_java_deps(java_deps),
+        jars = jars,
+        java_deps = java_deps,
         **kwargs
     )
 
@@ -175,11 +180,10 @@ def kotlin_binary(name,
                   java_deps = [],
                   **kwargs):
 
-    java_library_jars = _make_jars_list_from_java_deps(java_deps)
-
     kotlin_compile(
         name = name + "_kt",
-        jars = jars + java_library_jars,
+        jars = jars,
+        java_deps = java_deps,
         srcs = srcs,
         deps = deps,
         x_opts = x_opts,