Generate OutputGroupInfo in a new phase

Previously, it was generated in the "javainfo" phase, which runs before
the "depscheck" phase. "javainfo" can't run after "depscheck" because
"compile" depends on "javainfo", and "depscheck" can't run before
"javainfo" because it depends on "compile".

docs/newdocs/phases.md

@@ -15,6 +15,7 @@ def _scala_binary_implementation(ctx):
         ("ijinfo", _phase_ijinfo),
         ("binary_deployjar", _phase_binary_deployjar),
         ("binary_launcher", _phase_binary_launcher),
+        ("outputgroupinfo", _phase_outputgroupinfo),
         ("coda", _phase_coda),
     ]).coda
 ```

rules/private/phases.bzl

@@ -9,6 +9,7 @@ load(":phases/phase_ijinfo.bzl", _phase_ijinfo = "phase_ijinfo")
 load(":phases/phase_javainfo.bzl", _phase_javainfo = "phase_javainfo")
 load(":phases/phase_library_defaultinfo.bzl", _phase_library_defaultinfo = "phase_library_defaultinfo")
 load(":phases/phase_noop.bzl", _phase_noop = "phase_noop")
+load(":phases/phase_outputgroupinfo.bzl", _phase_outputgroupinfo = "phase_outputgroupinfo")
 load(":phases/phase_resources.bzl", _phase_resources = "phase_resources")
 load(":phases/phase_scalafmt_nondefault_outputs.bzl", _phase_scalafmt_nondefault_outputs = "phase_scalafmt_nondefault_outputs")
 load(":phases/phase_semanticdb.bzl", _phase_semanticdb = "phase_semanticdb")
@@ -41,6 +42,8 @@ phase_library_defaultinfo = _phase_library_defaultinfo
 
 phase_noop = _phase_noop
 
+phase_outputgroupinfo = _phase_outputgroupinfo
+
 phase_resources = _phase_resources
 
 phase_scalafmt_nondefault_outputs = _phase_scalafmt_nondefault_outputs

rules/private/phases/phase_javainfo.bzl

@@ -17,7 +17,6 @@ load(
 # PHASE: javainfo
 #
 # Builds up the JavaInfo provider. And the ScalaInfo, while we're at it.
-# And DefaultInfo.
 #
 
 def phase_javainfo(ctx, g):
@@ -65,18 +64,10 @@ def phase_javainfo(ctx, g):
         scala_configuration = g.init.scala_configuration,
     )
 
-    output_group_info = OutputGroupInfo(
-        **g.out.output_groups
-    )
-
-    g.out.providers.extend([
-        output_group_info,
-        java_info,
-        scala_info,
-    ])
+    g.out.providers.append(java_info)
+    g.out.providers.append(scala_info)
 
     return struct(
         java_info = java_info,
-        output_group_info = output_group_info,
         scala_info = scala_info,
     )

rules/private/phases/phase_outputgroupinfo.bzl

@@ -0,0 +1,8 @@
+#
+# PHASE: outputgroupinfo
+#
+# Generates the `OutputGroupInfo` provider.
+#
+
+def phase_outputgroupinfo(ctx, g):
+    g.out.providers.append(OutputGroupInfo(**g.out.output_groups))

rules/scala.bzl

@@ -29,6 +29,7 @@ load(
     _phase_javainfo = "phase_javainfo",
     _phase_library_defaultinfo = "phase_library_defaultinfo",
     _phase_noop = "phase_noop",
+    _phase_outputgroupinfo = "phase_outputgroupinfo",
     _phase_resources = "phase_resources",
     _phase_singlejar = "phase_singlejar",
     _phase_test_launcher = "phase_test_launcher",
@@ -218,6 +219,7 @@ def _scala_library_implementation(ctx):
         ("coverage", _phase_coverage_jacoco),
         ("ijinfo", _phase_ijinfo),
         ("library_defaultinfo", _phase_library_defaultinfo),
+        ("outputgroupinfo", _phase_outputgroupinfo),
         ("coda", _phase_coda),
     ]).coda
 
@@ -232,6 +234,7 @@ def _scala_binary_implementation(ctx):
         ("ijinfo", _phase_ijinfo),
         ("binary_deployjar", _phase_binary_deployjar),
         ("binary_launcher", _phase_binary_launcher),
+        ("outputgroupinfo", _phase_outputgroupinfo),
         ("coda", _phase_coda),
     ]).coda
 
@@ -245,6 +248,7 @@ def _scala_test_implementation(ctx):
         ("coverage", _phase_coverage_jacoco),
         ("ijinfo", _phase_ijinfo),
         ("test_launcher", _phase_test_launcher),
+        ("outputgroupinfo", _phase_outputgroupinfo),
         ("coda", _phase_coda),
     ]).coda