Add abazel() function to envsetup.

Test: Tested manually on Linux and macOS.

Change-Id: I17f061c2d9135a7a309fc0750cc44cb30d455bc7

envsetup.sh

@@ -318,6 +318,59 @@ function setpaths()
     #export HOST_EXTRACFLAGS="-I "$T/system/kernel_headers/host_include
 }
 
+function abazel()
+{
+    local T="$(gettop)"
+    if [ ! "$T" ]; then
+        echo "Couldn't locate the top of the tree.  Try setting TOP."
+        return
+    fi
+
+    case $(uname -s) in
+        Darwin)
+            ANDROID_BAZEL_PATH="${T}/prebuilts/bazel/darwin-x86_64/bazel"
+            ANDROID_BAZELRC_PATH="${T}/build/bazel/darwin.bazelrc"
+            ANDROID_BAZEL_JDK_PATH="${T}/prebuilts/jdk/jdk11/darwin-x86"
+            ;;
+        Linux)
+            ANDROID_BAZEL_PATH="${T}/prebuilts/bazel/linux-x86_64/bazel"
+            ANDROID_BAZELRC_PATH="${T}/build/bazel/linux.bazelrc"
+            ANDROID_BAZEL_JDK_PATH="${T}/prebuilts/jdk/jdk11/linux-x86"
+            ;;
+        *)
+            ANDROID_BAZEL_PATH=
+            ANDROID_BAZELRC_PATH=
+            ANDROID_BAZEL_JDK_PATH=
+            ;;
+    esac
+
+    if [ -n "$ANDROID_BAZEL_PATH" -a -f "$ANDROID_BAZEL_PATH" ]; then
+        export ANDROID_BAZEL_PATH
+    else
+        echo "Couldn't locate Bazel binary"
+        return
+    fi
+
+    if [ -n "$ANDROID_BAZELRC_PATH" -a -f "$ANDROID_BAZELRC_PATH" ]; then
+        export ANDROID_BAZELRC_PATH
+    else
+        echo "Couldn't locate bazelrc file for Bazel"
+        return
+    fi
+
+    if [ -n "$ANDROID_BAZEL_JDK_PATH" -a -d "$ANDROID_BAZEL_JDK_PATH" ]; then
+        export ANDROID_BAZEL_JDK_PATH
+    else
+        echo "Couldn't locate JDK to use for Bazel"
+        return
+    fi
+
+    echo "WARNING: Bazel support for the Android Platform is experimental and is undergoing development."
+    echo "WARNING: Currently, build stability is not guaranteed. Thank you."
+    echo
+    "${ANDROID_BAZEL_PATH}" --server_javabase="${ANDROID_BAZEL_JDK_PATH}" --bazelrc="${ANDROID_BAZELRC_PATH}" "$@"
+}
+
 function printconfig()
 {
     local T=$(gettop)