1 files changed, 104 insertions, 0 deletions
diff --git a/ui/build/kati.go b/ui/build/kati.go
new file mode 100644
index 00000000..6997fbec
--- /dev/null
+++ b/ui/build/kati.go
@@ -0,0 +1,104 @@
+// Copyright 2017 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package build
+
+import (
+	"crypto/md5"
+	"fmt"
+	"io/ioutil"
+	"os/exec"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+var spaceSlashReplacer = strings.NewReplacer("/", "_", " ", "_")
+
+// genKatiSuffix creates a suffix for kati-generated files so that we can cache
+// them based on their inputs. So this should encode all common changes to Kati
+// inputs. Currently that includes the TARGET_PRODUCT, kati-processed command
+// line arguments, and the directories specified by mm/mmm.
+func genKatiSuffix(ctx Context, config Config) {
+	katiSuffix := "-" + config.TargetProduct()
+	if args := config.KatiArgs(); len(args) > 0 {
+		katiSuffix += "-" + spaceSlashReplacer.Replace(strings.Join(args, "_"))
+	}
+	if oneShot, ok := config.Environment().Get("ONE_SHOT_MAKEFILE"); ok {
+		katiSuffix += "-" + spaceSlashReplacer.Replace(oneShot)
+	}
+
+	// If the suffix is too long, replace it with a md5 hash and write a
+	// file that contains the original suffix.
+	if len(katiSuffix) > 64 {
+		shortSuffix := "-" + fmt.Sprintf("%x", md5.Sum([]byte(katiSuffix)))
+		config.SetKatiSuffix(shortSuffix)
+
+		ctx.Verbosef("Kati ninja suffix too long: %q", katiSuffix)
+		ctx.Verbosef("Replacing with: %q", shortSuffix)
+
+		if err := ioutil.WriteFile(strings.TrimSuffix(config.KatiNinjaFile(), "ninja")+"suf", []byte(katiSuffix), 0777); err != nil {
+			ctx.Println("Error writing suffix file:", err)
+		}
+	} else {
+		config.SetKatiSuffix(katiSuffix)
+	}
+}
+
+func runKati(ctx Context, config Config) {
+	genKatiSuffix(ctx, config)
+
+	executable := "prebuilts/build-tools/" + config.HostPrebuiltTag() + "/bin/ckati"
+	args := []string{
+		"--ninja",
+		"--ninja_dir=" + config.OutDir(),
+		"--ninja_suffix=" + config.KatiSuffix(),
+		"--regen",
+		"--ignore_optional_include=" + filepath.Join(config.OutDir(), "%.P"),
+		"--detect_android_echo",
+	}
+
+	if !config.Environment().IsFalse("KATI_EMULATE_FIND") {
+		args = append(args, "--use_find_emulator")
+	}
+
+	// The argument order could be simplified, but currently this matches
+	// the ordering in Make
+	args = append(args, "-f", "build/core/main.mk")
+
+	args = append(args, config.KatiArgs()...)
+
+	args = append(args,
+		"--gen_all_targets",
+		"BUILDING_WITH_NINJA=true",
+		"SOONG_ANDROID_MK="+config.SoongAndroidMk(),
+		"SOONG_MAKEVARS_MK="+config.SoongMakeVarsMk())
+
+	if config.UseGoma() {
+		args = append(args, "-j"+strconv.Itoa(config.Parallel()))
+	}
+
+	cmd := exec.CommandContext(ctx.Context, executable, args...)
+	cmd.Env = config.Environment().Environ()
+	cmd.Stdout = ctx.Stdout()
+	cmd.Stderr = ctx.Stderr()
+	ctx.Verboseln(cmd.Path, cmd.Args)
+	if err := cmd.Run(); err != nil {
+		if e, ok := err.(*exec.ExitError); ok {
+			ctx.Fatalln("ckati failed with:", e.ProcessState.String())
+		} else {
+			ctx.Fatalln("Failed to run ckati:", err)
+		}
+	}
+}