Allow sdk members to vary by os type

Adds support for specifying separate members to an sdk/module_exports
for different os types, e.g. separate ones for android and host.

Adds 'android:"arch_variant"' tag to the dynamically generated fields
for the sdk member types.

Merges the exported members from all variants together.

Determines the device/host_supported flags of the member snapshots by
whether the OsClasses used by their variants rather than the sdk's
host/device supported properties as they may be different.

Bug: 150451422
Test: m nothing
Change-Id: I41fbbcd8723aafd54826aad9b78eced9f66ef51c

1 files changed, 123 insertions, 0 deletions

diff --git a/sdk/java_sdk_test.go b/sdk/java_sdk_test.go
index 45da1f957..c60002b08 100644
--- a/sdk/java_sdk_test.go
+++ b/sdk/java_sdk_test.go
@@ -816,3 +816,126 @@ sdk_snapshot {
 		checkAllCopyRules(".intermediates/system-module/linux_glibc_common/javac/system-module.jar -> java/system-module.jar"),
 	)
 }
+
+func TestDeviceAndHostSnapshotWithOsSpecificMembers(t *testing.T) {
+	// b/145598135 - Generating host snapshots for anything other than linux is not supported.
+	SkipIfNotLinux(t)
+
+	result := testSdkWithJava(t, `
+		module_exports {
+			name: "myexports",
+			host_supported: true,
+			java_libs: ["myjavalib"],
+			target: {
+				android: {
+					java_header_libs: ["androidjavalib"],
+				},
+				host: {
+					java_header_libs: ["hostjavalib"],
+				},
+			},
+		}
+
+		java_library {
+			name: "myjavalib",
+			host_supported: true,
+			srcs: ["Test.java"],
+			system_modules: "none",
+			sdk_version: "none",
+		}
+
+		java_library {
+			name: "androidjavalib",
+			srcs: ["Test.java"],
+			system_modules: "none",
+			sdk_version: "none",
+		}
+
+		java_library_host {
+			name: "hostjavalib",
+			srcs: ["Test.java"],
+		}
+	`)
+
+	result.CheckSnapshot("myexports", "",
+		checkAndroidBpContents(`
+// This is auto-generated. DO NOT EDIT.
+
+java_import {
+    name: "myexports_hostjavalib@current",
+    sdk_member_name: "hostjavalib",
+    device_supported: false,
+    host_supported: true,
+    jars: ["java/hostjavalib.jar"],
+}
+
+java_import {
+    name: "hostjavalib",
+    prefer: false,
+    device_supported: false,
+    host_supported: true,
+    jars: ["java/hostjavalib.jar"],
+}
+
+java_import {
+    name: "myexports_androidjavalib@current",
+    sdk_member_name: "androidjavalib",
+    jars: ["java/androidjavalib.jar"],
+}
+
+java_import {
+    name: "androidjavalib",
+    prefer: false,
+    jars: ["java/androidjavalib.jar"],
+}
+
+java_import {
+    name: "myexports_myjavalib@current",
+    sdk_member_name: "myjavalib",
+    host_supported: true,
+    target: {
+        android: {
+            jars: ["java/android/myjavalib.jar"],
+        },
+        linux_glibc: {
+            jars: ["java/linux_glibc/myjavalib.jar"],
+        },
+    },
+}
+
+java_import {
+    name: "myjavalib",
+    prefer: false,
+    host_supported: true,
+    target: {
+        android: {
+            jars: ["java/android/myjavalib.jar"],
+        },
+        linux_glibc: {
+            jars: ["java/linux_glibc/myjavalib.jar"],
+        },
+    },
+}
+
+module_exports_snapshot {
+    name: "myexports@current",
+    host_supported: true,
+    target: {
+        android: {
+            java_header_libs: ["myexports_androidjavalib@current"],
+        },
+        linux_glibc: {
+            java_header_libs: ["myexports_hostjavalib@current"],
+        },
+    },
+    java_libs: ["myexports_myjavalib@current"],
+}
+`),
+		checkAllCopyRules(`
+.intermediates/hostjavalib/linux_glibc_common/javac/hostjavalib.jar -> java/hostjavalib.jar
+.intermediates/androidjavalib/android_common/turbine-combined/androidjavalib.jar -> java/androidjavalib.jar
+.intermediates/myjavalib/android_common/javac/myjavalib.jar -> java/android/myjavalib.jar
+.intermediates/myjavalib/linux_glibc_common/javac/myjavalib.jar -> java/linux_glibc/myjavalib.jar
+`),
+	)
+}