Migrate buildinfo.sh script into Soong

To build system.img in Soong, we need all artifacts including
build.prop. This fully migrates buildinfo.prop file into Soong as a
first step to build build.prop on Soong.

Bug: 322090587
Test: compare build.prop before and after
Test: build multiple times and see build.prop isn't rebuilt
Change-Id: Icaa7e1fdab2a8c169ac00949d3aaf6c8212a1872

7 files changed, 340 insertions, 88 deletions

diff --git a/android/buildinfo_prop.go b/android/buildinfo_prop.go
index 8e19ad5f4..8288fc555 100644
--- a/android/buildinfo_prop.go
+++ b/android/buildinfo_prop.go
@@ -54,6 +54,39 @@ func (p *buildinfoPropModule) OutputFiles(tag string) (Paths, error) {
 	return Paths{p.outputFilePath}, nil
 }
 
+func getBuildVariant(config Config) string {
+	if config.Eng() {
+		return "eng"
+	} else if config.Debuggable() {
+		return "userdebug"
+	} else {
+		return "user"
+	}
+}
+
+func getBuildFlavor(config Config) string {
+	buildFlavor := config.DeviceProduct() + "-" + getBuildVariant(config)
+	if InList("address", config.SanitizeDevice()) && !strings.Contains(buildFlavor, "_asan") {
+		buildFlavor += "_asan"
+	}
+	return buildFlavor
+}
+
+func shouldAddBuildThumbprint(config Config) bool {
+	knownOemProperties := []string{
+		"ro.product.brand",
+		"ro.product.name",
+		"ro.product.device",
+	}
+
+	for _, knownProp := range knownOemProperties {
+		if InList(knownProp, config.OemProperties()) {
+			return true
+		}
+	}
+	return false
+}
+
 func (p *buildinfoPropModule) GenerateAndroidBuildActions(ctx ModuleContext) {
 	p.outputFilePath = PathForModuleOut(ctx, p.Name()).OutputPath
 	if !ctx.Config().KatiEnabled() {
@@ -61,87 +94,66 @@ func (p *buildinfoPropModule) GenerateAndroidBuildActions(ctx ModuleContext) {
 		return
 	}
 
-	lines := make([]string, 0)
+	rule := NewRuleBuilder(pctx, ctx)
 
-	writeString := func(str string) {
-		lines = append(lines, str)
-	}
+	config := ctx.Config()
+	buildVariant := getBuildVariant(config)
+	buildFlavor := getBuildFlavor(config)
 
-	writeString("# begin build properties")
-	writeString("# autogenerated by build/soong/android/buildinfo_prop.go")
+	cmd := rule.Command().BuiltTool("buildinfo")
 
-	writeProp := func(key, value string) {
-		if strings.Contains(key, "=") {
-			panic(fmt.Errorf("wrong property key %q: key must not contain '='", key))
-		}
-		writeString(key + "=" + value)
+	if config.BoardUseVbmetaDigestInFingerprint() {
+		cmd.Flag("--use-vbmeta-digest-in-fingerprint")
 	}
 
-	config := ctx.Config()
-
-	writeProp("ro.build.version.sdk", config.PlatformSdkVersion().String())
-	writeProp("ro.build.version.preview_sdk", config.PlatformPreviewSdkVersion())
-	writeProp("ro.build.version.codename", config.PlatformSdkCodename())
-	writeProp("ro.build.version.all_codenames", strings.Join(config.PlatformVersionActiveCodenames(), ","))
-	writeProp("ro.build.version.release", config.PlatformVersionLastStable())
-	writeProp("ro.build.version.release_or_codename", config.PlatformVersionName())
-	writeProp("ro.build.version.security_patch", config.PlatformSecurityPatch())
-	writeProp("ro.build.version.base_os", config.PlatformBaseOS())
-	writeProp("ro.build.version.min_supported_target_sdk", config.PlatformMinSupportedTargetSdkVersion())
-	writeProp("ro.build.version.known_codenames", config.PlatformVersionKnownCodenames())
+	cmd.FlagWithArg("--build-flavor=", buildFlavor)
+	cmd.FlagWithInput("--build-hostname-file=", config.BuildHostnameFile(ctx))
+	cmd.FlagWithArg("--build-id=", config.BuildId())
+	cmd.FlagWithArg("--build-keys=", config.BuildKeys())
 
-	if config.Eng() {
-		writeProp("ro.build.type", "eng")
-	} else if config.Debuggable() {
-		writeProp("ro.build.type", "userdebug")
-	} else {
-		writeProp("ro.build.type", "user")
+	// shouldn't depend on BuildNumberFile and BuildThumbprintFile to prevent from rebuilding
+	// on every incremental build.
+	cmd.FlagWithArg("--build-number-file=", config.BuildNumberFile(ctx).String())
+	if shouldAddBuildThumbprint(config) {
+		cmd.FlagWithArg("--build-thumbprint-file=", config.BuildThumbprintFile(ctx).String())
 	}
 
-	// Currently, only a few properties are implemented to unblock microdroid use case.
-	// TODO(b/189164487): support below properties as well and replace build/make/tools/buildinfo.sh
-	/*
-		if $BOARD_USE_VBMETA_DIGTEST_IN_FINGERPRINT {
-			writeProp("ro.build.legacy.id", config.BuildID())
-		} else {
-			writeProp("ro.build.id", config.BuildId())
-		}
-		writeProp("ro.build.display.id", $BUILD_DISPLAY_ID)
-		writeProp("ro.build.version.incremental", $BUILD_NUMBER)
-		writeProp("ro.build.version.preview_sdk_fingerprint", $PLATFORM_PREVIEW_SDK_FINGERPRINT)
-		writeProp("ro.build.version.release_or_preview_display", $PLATFORM_DISPLAY_VERSION)
-		writeProp("ro.build.date", `$DATE`)
-		writeProp("ro.build.date.utc", `$DATE +%s`)
-		writeProp("ro.build.user", $BUILD_USERNAME)
-		writeProp("ro.build.host", $BUILD_HOSTNAME)
-		writeProp("ro.build.tags", $BUILD_VERSION_TAGS)
-		writeProp("ro.build.flavor", $TARGET_BUILD_FLAVOR)
-		// These values are deprecated, use "ro.product.cpu.abilist"
-		// instead (see below).
-		writeString("# ro.product.cpu.abi and ro.product.cpu.abi2 are obsolete,")
-		writeString("# use ro.product.cpu.abilist instead.")
-		writeProp("ro.product.cpu.abi", $TARGET_CPU_ABI)
-		if [ -n "$TARGET_CPU_ABI2" ] {
-			writeProp("ro.product.cpu.abi2", $TARGET_CPU_ABI2)
-		}
+	cmd.FlagWithArg("--build-type=", config.BuildType())
+	cmd.FlagWithArg("--build-username=", config.Getenv("BUILD_USERNAME"))
+	cmd.FlagWithArg("--build-variant=", buildVariant)
+	cmd.FlagForEachArg("--cpu-abis=", config.DeviceAbi())
 
-		if [ -n "$PRODUCT_DEFAULT_LOCALE" ] {
-			writeProp("ro.product.locale", $PRODUCT_DEFAULT_LOCALE)
-		}
-		writeProp("ro.wifi.channels", $PRODUCT_DEFAULT_WIFI_CHANNELS)
-		writeString("# ro.build.product is obsolete; use ro.product.device")
-		writeProp("ro.build.product", $TARGET_DEVICE)
-
-		writeString("# Do not try to parse description or thumbprint")
-		writeProp("ro.build.description", $PRIVATE_BUILD_DESC)
-		if [ -n "$BUILD_THUMBPRINT" ] {
-			writeProp("ro.build.thumbprint", $BUILD_THUMBPRINT)
-		}
-	*/
+	// shouldn't depend on BUILD_DATETIME_FILE to prevent from rebuilding on every incremental
+	// build.
+	cmd.FlagWithArg("--date-file=", ctx.Config().Getenv("BUILD_DATETIME_FILE"))
 
-	writeString("# end build properties")
+	if len(config.ProductLocales()) > 0 {
+		cmd.FlagWithArg("--default-locale=", config.ProductLocales()[0])
+	}
+
+	cmd.FlagForEachArg("--default-wifi-channels=", config.ProductDefaultWifiChannels())
+	cmd.FlagWithArg("--device=", config.DeviceName())
+	if config.DisplayBuildNumber() {
+		cmd.Flag("--display-build-number")
+	}
 
-	WriteFileRule(ctx, p.outputFilePath, strings.Join(lines, "\n"))
+	cmd.FlagWithArg("--platform-base-os=", config.PlatformBaseOS())
+	cmd.FlagWithArg("--platform-display-version=", config.PlatformDisplayVersionName())
+	cmd.FlagWithArg("--platform-min-supported-target-sdk-version=", config.PlatformMinSupportedTargetSdkVersion())
+	cmd.FlagWithInput("--platform-preview-sdk-fingerprint-file=", ApiFingerprintPath(ctx))
+	cmd.FlagWithArg("--platform-preview-sdk-version=", config.PlatformPreviewSdkVersion())
+	cmd.FlagWithArg("--platform-sdk-version=", config.PlatformSdkVersion().String())
+	cmd.FlagWithArg("--platform-security-patch=", config.PlatformSecurityPatch())
+	cmd.FlagWithArg("--platform-version=", config.PlatformVersionName())
+	cmd.FlagWithArg("--platform-version-codename=", config.PlatformSdkCodename())
+	cmd.FlagForEachArg("--platform-version-all-codenames=", config.PlatformVersionActiveCodenames())
+	cmd.FlagWithArg("--platform-version-known-codenames=", config.PlatformVersionKnownCodenames())
+	cmd.FlagWithArg("--platform-version-last-stable=", config.PlatformVersionLastStable())
+	cmd.FlagWithArg("--product=", config.DeviceProduct())
+
+	cmd.FlagWithOutput("--out=", p.outputFilePath)
+
+	rule.Build(ctx.ModuleName(), "generating buildinfo props")
 
 	if !p.installable() {
 		p.SkipInstall()
diff --git a/android/config.go b/android/config.go
index 10c30d4df..18f89fb34 100644
--- a/android/config.go
+++ b/android/config.go
@@ -114,6 +114,8 @@ const (
 	GenerateDocFile
 )
 
+const testKeyDir = "build/make/target/product/security"
+
 // SoongOutDir returns the build output directory for the configuration.
 func (c Config) SoongOutDir() string {
 	return c.soongOutDir
@@ -841,6 +843,10 @@ func (c *config) BuildId() string {
 	return String(c.productVariables.BuildId)
 }
 
+func (c *config) DisplayBuildNumber() bool {
+	return Bool(c.productVariables.DisplayBuildNumber)
+}
+
 // BuildNumberFile returns the path to a text file containing metadata
 // representing the current build's number.
 //
@@ -852,6 +858,23 @@ func (c *config) BuildNumberFile(ctx PathContext) Path {
 	return PathForOutput(ctx, String(c.productVariables.BuildNumberFile))
 }
 
+// BuildHostnameFile returns the path to a text file containing metadata
+// representing the current build's host name.
+func (c *config) BuildHostnameFile(ctx PathContext) Path {
+	return PathForOutput(ctx, String(c.productVariables.BuildHostnameFile))
+}
+
+// BuildThumbprintFile returns the path to a text file containing metadata
+// representing the current build's thumbprint.
+//
+// Rules that want to reference the build thumbprint should read from this file
+// without depending on it. They will run whenever their other dependencies
+// require them to run and get the current build thumbprint. This ensures they
+// don't rebuild on every incremental build when the build thumbprint changes.
+func (c *config) BuildThumbprintFile(ctx PathContext) Path {
+	return PathForOutput(ctx, String(c.productVariables.BuildThumbprintFile))
+}
+
 // DeviceName returns the name of the current device target.
 // TODO: take an AndroidModuleContext to select the device name for multi-device builds
 func (c *config) DeviceName() string {
@@ -873,6 +896,10 @@ func (c *config) HasDeviceProduct() bool {
 	return c.productVariables.DeviceProduct != nil
 }
 
+func (c *config) DeviceAbi() []string {
+	return c.productVariables.DeviceAbi
+}
+
 func (c *config) DeviceResourceOverlays() []string {
 	return c.productVariables.DeviceResourceOverlays
 }
@@ -881,6 +908,10 @@ func (c *config) ProductResourceOverlays() []string {
 	return c.productVariables.ProductResourceOverlays
 }
 
+func (c *config) PlatformDisplayVersionName() string {
+	return String(c.productVariables.Platform_display_version_name)
+}
+
 func (c *config) PlatformVersionName() string {
 	return String(c.productVariables.Platform_version_name)
 }
@@ -1038,7 +1069,7 @@ func (c *config) DefaultAppCertificateDir(ctx PathContext) SourcePath {
 	if defaultCert != "" {
 		return PathForSource(ctx, filepath.Dir(defaultCert))
 	}
-	return PathForSource(ctx, "build/make/target/product/security")
+	return PathForSource(ctx, testKeyDir)
 }
 
 func (c *config) DefaultAppCertificate(ctx PathContext) (pem, key SourcePath) {
@@ -1050,10 +1081,18 @@ func (c *config) DefaultAppCertificate(ctx PathContext) (pem, key SourcePath) {
 	return defaultDir.Join(ctx, "testkey.x509.pem"), defaultDir.Join(ctx, "testkey.pk8")
 }
 
+func (c *config) BuildKeys() string {
+	defaultCert := String(c.productVariables.DefaultAppCertificate)
+	if defaultCert == "" || defaultCert == filepath.Join(testKeyDir, "testkey") {
+		return "test-keys"
+	}
+	return "dev-keys"
+}
+
 func (c *config) ApexKeyDir(ctx ModuleContext) SourcePath {
 	// TODO(b/121224311): define another variable such as TARGET_APEX_KEY_OVERRIDE
 	defaultCert := String(c.productVariables.DefaultAppCertificate)
-	if defaultCert == "" || filepath.Dir(defaultCert) == "build/make/target/product/security" {
+	if defaultCert == "" || filepath.Dir(defaultCert) == testKeyDir {
 		// When defaultCert is unset or is set to the testkeys path, use the APEX keys
 		// that is under the module dir
 		return pathForModuleSrc(ctx)
@@ -1112,6 +1151,10 @@ func (c *config) Eng() bool {
 	return Bool(c.productVariables.Eng)
 }
 
+func (c *config) BuildType() string {
+	return String(c.productVariables.BuildType)
+}
+
 // DevicePrimaryArchType returns the ArchType for the first configured device architecture, or
 // Common if there are no device architectures.
 func (c *config) DevicePrimaryArchType() ArchType {
@@ -2086,3 +2129,19 @@ func (c *config) AllApexContributions() []string {
 func (c *config) BuildIgnoreApexContributionContents() []string {
 	return c.productVariables.BuildIgnoreApexContributionContents
 }
+
+func (c *config) ProductLocales() []string {
+	return c.productVariables.ProductLocales
+}
+
+func (c *config) ProductDefaultWifiChannels() []string {
+	return c.productVariables.ProductDefaultWifiChannels
+}
+
+func (c *config) BoardUseVbmetaDigestInFingerprint() bool {
+	return Bool(c.productVariables.BoardUseVbmetaDigestInFingerprint)
+}
+
+func (c *config) OemProperties() []string {
+	return c.productVariables.OemProperties
+}
diff --git a/android/sdk.go b/android/sdk.go
index 6d5293e65..121470d6e 100644
--- a/android/sdk.go
+++ b/android/sdk.go
@@ -868,3 +868,11 @@ type AdditionalSdkInfo struct {
 }
 
 var AdditionalSdkInfoProvider = blueprint.NewProvider[AdditionalSdkInfo]()
+
+var apiFingerprintPathKey = NewOnceKey("apiFingerprintPathKey")
+
+func ApiFingerprintPath(ctx PathContext) OutputPath {
+	return ctx.Config().Once(apiFingerprintPathKey, func() interface{} {
+		return PathForOutput(ctx, "api_fingerprint.txt")
+	}).(OutputPath)
+}
diff --git a/android/variable.go b/android/variable.go
index 73f5bfd1f..9b630c01f 100644
--- a/android/variable.go
+++ b/android/variable.go
@@ -193,9 +193,13 @@ type ProductVariables struct {
 	// Suffix to add to generated Makefiles
 	Make_suffix *string `json:",omitempty"`
 
-	BuildId         *string `json:",omitempty"`
-	BuildNumberFile *string `json:",omitempty"`
+	BuildId             *string `json:",omitempty"`
+	BuildNumberFile     *string `json:",omitempty"`
+	BuildHostnameFile   *string `json:",omitempty"`
+	BuildThumbprintFile *string `json:",omitempty"`
+	DisplayBuildNumber  *bool   `json:",omitempty"`
 
+	Platform_display_version_name             *string  `json:",omitempty"`
 	Platform_version_name                     *string  `json:",omitempty"`
 	Platform_sdk_version                      *int     `json:",omitempty"`
 	Platform_sdk_codename                     *string  `json:",omitempty"`
@@ -296,6 +300,8 @@ type ProductVariables struct {
 	MinimizeJavaDebugInfo        *bool    `json:",omitempty"`
 	Build_from_text_stub         *bool    `json:",omitempty"`
 
+	BuildType *string `json:",omitempty"`
+
 	Check_elf_files *bool `json:",omitempty"`
 
 	UncompressPrivAppDex             *bool    `json:",omitempty"`
@@ -472,9 +478,8 @@ type ProductVariables struct {
 
 	AfdoProfiles []string `json:",omitempty"`
 
-	ProductManufacturer string   `json:",omitempty"`
-	ProductBrand        string   `json:",omitempty"`
-	BuildVersionTags    []string `json:",omitempty"`
+	ProductManufacturer string `json:",omitempty"`
+	ProductBrand        string `json:",omitempty"`
 
 	ReleaseVersion          string   `json:",omitempty"`
 	ReleaseAconfigValueSets []string `json:",omitempty"`
@@ -502,6 +507,14 @@ type ProductVariables struct {
 	ExportRuntimeApis *bool `json:",omitempty"`
 
 	AconfigContainerValidation string `json:",omitempty"`
+
+	ProductLocales []string `json:",omitempty"`
+
+	ProductDefaultWifiChannels []string `json:",omitempty"`
+
+	BoardUseVbmetaDigestInFingerprint *bool `json:",omitempty"`
+
+	OemProperties []string `json:",omitempty"`
 }
 
 type PartitionQualifiedVariablesType struct {
diff --git a/java/sdk.go b/java/sdk.go
index 3591ccdb6..d972c19bd 100644
--- a/java/sdk.go
+++ b/java/sdk.go
@@ -31,7 +31,6 @@ func init() {
 
 var sdkFrameworkAidlPathKey = android.NewOnceKey("sdkFrameworkAidlPathKey")
 var nonUpdatableFrameworkAidlPathKey = android.NewOnceKey("nonUpdatableFrameworkAidlPathKey")
-var apiFingerprintPathKey = android.NewOnceKey("apiFingerprintPathKey")
 
 func UseApiFingerprint(ctx android.BaseModuleContext) (useApiFingerprint bool, fingerprintSdkVersion string, fingerprintDeps android.OutputPath) {
 	if ctx.Config().UnbundledBuild() && !ctx.Config().AlwaysUsePrebuiltSdks() {
@@ -45,8 +44,8 @@ func UseApiFingerprint(ctx android.BaseModuleContext) (useApiFingerprint bool, f
 
 		useApiFingerprint = apiFingerprintTrue || dessertShaIsSet
 		if apiFingerprintTrue {
-			fingerprintSdkVersion = ctx.Config().PlatformSdkCodename() + fmt.Sprintf(".$$(cat %s)", ApiFingerprintPath(ctx).String())
-			fingerprintDeps = ApiFingerprintPath(ctx)
+			fingerprintSdkVersion = ctx.Config().PlatformSdkCodename() + fmt.Sprintf(".$$(cat %s)", android.ApiFingerprintPath(ctx).String())
+			fingerprintDeps = android.ApiFingerprintPath(ctx)
 		}
 		if dessertShaIsSet {
 			fingerprintSdkVersion = ctx.Config().Getenv("UNBUNDLED_BUILD_TARGET_SDK_WITH_DESSERT_SHA")
@@ -337,7 +336,7 @@ func nonUpdatableFrameworkAidlPath(ctx android.PathContext) android.OutputPath {
 
 // Create api_fingerprint.txt
 func createAPIFingerprint(ctx android.SingletonContext) {
-	out := ApiFingerprintPath(ctx)
+	out := android.ApiFingerprintPath(ctx)
 
 	rule := android.NewRuleBuilder(pctx, ctx)
 
@@ -378,17 +377,11 @@ func createAPIFingerprint(ctx android.SingletonContext) {
 	rule.Build("api_fingerprint", "generate api_fingerprint.txt")
 }
 
-func ApiFingerprintPath(ctx android.PathContext) android.OutputPath {
-	return ctx.Config().Once(apiFingerprintPathKey, func() interface{} {
-		return android.PathForOutput(ctx, "api_fingerprint.txt")
-	}).(android.OutputPath)
-}
-
 func sdkMakeVars(ctx android.MakeVarsContext) {
 	if ctx.Config().AlwaysUsePrebuiltSdks() {
 		return
 	}
 
 	ctx.Strict("FRAMEWORK_AIDL", sdkFrameworkAidlPath(ctx).String())
-	ctx.Strict("API_FINGERPRINT", ApiFingerprintPath(ctx).String())
+	ctx.Strict("API_FINGERPRINT", android.ApiFingerprintPath(ctx).String())
 }
diff --git a/scripts/Android.bp b/scripts/Android.bp
index f36329b1d..d039a8171 100644
--- a/scripts/Android.bp
+++ b/scripts/Android.bp
@@ -305,3 +305,14 @@ python_binary_host {
         },
     },
 }
+
+python_binary_host {
+    name: "buildinfo",
+    main: "buildinfo.py",
+    srcs: ["buildinfo.py"],
+    version: {
+        py3: {
+            embedded_launcher: true,
+        },
+    },
+}
diff --git a/scripts/buildinfo.py b/scripts/buildinfo.py
new file mode 100755
index 000000000..e4fb0da09
--- /dev/null
+++ b/scripts/buildinfo.py
@@ -0,0 +1,156 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2024 The Android Open Source Project
+#
+# 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.
+#
+"""A tool for generating buildinfo.prop"""
+
+import argparse
+import contextlib
+import subprocess
+
+def parse_args():
+  """Parse commandline arguments."""
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--use-vbmeta-digest-in-fingerprint', action='store_true')
+  parser.add_argument('--build-flavor', required=True)
+  parser.add_argument('--build-hostname-file', required=True, type=argparse.FileType('r')),
+  parser.add_argument('--build-id', required=True)
+  parser.add_argument('--build-keys', required=True)
+  parser.add_argument('--build-number-file', required=True, type=argparse.FileType('r'))
+  parser.add_argument('--build-thumbprint-file', type=argparse.FileType('r'))
+  parser.add_argument('--build-type', required=True)
+  parser.add_argument('--build-username', required=True)
+  parser.add_argument('--build-variant', required=True)
+  parser.add_argument('--cpu-abis', action='append', required=True)
+  parser.add_argument('--date-file', required=True, type=argparse.FileType('r'))
+  parser.add_argument('--default-locale')
+  parser.add_argument('--default-wifi-channels', action='append', default=[])
+  parser.add_argument('--device', required=True)
+  parser.add_argument("--display-build-number", action='store_true')
+  parser.add_argument('--platform-base-os', required=True)
+  parser.add_argument('--platform-display-version', required=True)
+  parser.add_argument('--platform-min-supported-target-sdk-version', required=True)
+  parser.add_argument('--platform-preview-sdk-fingerprint-file',
+                      required=True,
+                      type=argparse.FileType('r'))
+  parser.add_argument('--platform-preview-sdk-version', required=True)
+  parser.add_argument('--platform-sdk-version', required=True)
+  parser.add_argument('--platform-security-patch', required=True)
+  parser.add_argument('--platform-version', required=True)
+  parser.add_argument('--platform-version-codename',required=True)
+  parser.add_argument('--platform-version-all-codenames', action='append', required=True)
+  parser.add_argument('--platform-version-known-codenames', required=True)
+  parser.add_argument('--platform-version-last-stable', required=True)
+  parser.add_argument('--product', required=True)
+
+  parser.add_argument('--out', required=True, type=argparse.FileType('w'))
+
+  return parser.parse_args()
+
+def main():
+  option = parse_args()
+
+  build_hostname = option.build_hostname_file.read().strip()
+  build_number = option.build_number_file.read().strip()
+  build_version_tags = option.build_keys
+  if option.build_type == "debug":
+    build_version_tags = "debug," + build_version_tags
+
+  raw_date = option.date_file.read().strip()
+  date = subprocess.check_output(["date", "-d", f"@{raw_date}"], text=True).strip()
+  date_utc = subprocess.check_output(["date", "-d", f"@{raw_date}", "+%s"], text=True).strip()
+
+  # build_desc is human readable strings that describe this build. This has the same info as the
+  # build fingerprint.
+  # e.g. "aosp_cf_x86_64_phone-userdebug VanillaIceCream MAIN eng.20240319.143939 test-keys"
+  build_desc = f"{option.product}-{option.build_variant} {option.platform_version} " \
+               f"{option.build_id} {build_number} {build_version_tags}"
+
+  platform_preview_sdk_fingerprint = option.platform_preview_sdk_fingerprint_file.read().strip()
+
+  with contextlib.redirect_stdout(option.out):
+    print("# begin build properties")
+    print("# autogenerated by buildinfo.py")
+
+    # The ro.build.id will be set dynamically by init, by appending the unique vbmeta digest.
+    if option.use_vbmeta_digest_in_fingerprint:
+      print(f"ro.build.legacy.id={option.build_id}")
+    else:
+      print(f"ro.build.id?={option.build_id}")
+
+    # ro.build.display.id is shown under Settings -> About Phone
+    if option.build_variant == "user":
+      # User builds should show:
+      # release build number or branch.buld_number non-release builds
+
+      # Dev. branches should have DISPLAY_BUILD_NUMBER set
+      if option.display_build_number:
+        print(f"ro.build.display.id?={option.build_id} {build_number} {option.build_keys}")
+      else:
+        print(f"ro.build.display.id?={option.build_id} {option.build_keys}")
+    else:
+      # Non-user builds should show detailed build information (See build desc above)
+      print(f"ro.build.display.id?={build_desc}")
+    print(f"ro.build.version.incremental={build_number}")
+    print(f"ro.build.version.sdk={option.platform_sdk_version}")
+    print(f"ro.build.version.preview_sdk={option.platform_preview_sdk_version}")
+    print(f"ro.build.version.preview_sdk_fingerprint={platform_preview_sdk_fingerprint}")
+    print(f"ro.build.version.codename={option.platform_version_codename}")
+    print(f"ro.build.version.all_codenames={','.join(option.platform_version_all_codenames)}")
+    print(f"ro.build.version.known_codenames={option.platform_version_known_codenames}")
+    print(f"ro.build.version.release={option.platform_version_last_stable}")
+    print(f"ro.build.version.release_or_codename={option.platform_version}")
+    print(f"ro.build.version.release_or_preview_display={option.platform_display_version}")
+    print(f"ro.build.version.security_patch={option.platform_security_patch}")
+    print(f"ro.build.version.base_os={option.platform_base_os}")
+    print(f"ro.build.version.min_supported_target_sdk={option.platform_min_supported_target_sdk_version}")
+    print(f"ro.build.date={date}")
+    print(f"ro.build.date.utc={date_utc}")
+    print(f"ro.build.type={option.build_variant}")
+    print(f"ro.build.user={option.build_username}")
+    print(f"ro.build.host={build_hostname}")
+    # TODO: Remove any tag-related optional property declarations once the goals
+    # from go/arc-android-sigprop-changes have been achieved.
+    print(f"ro.build.tags?={build_version_tags}")
+    # ro.build.flavor are used only by the test harness to distinguish builds.
+    # Only add _asan for a sanitized build if it isn't already a part of the
+    # flavor (via a dedicated lunch config for example).
+    print(f"ro.build.flavor={option.build_flavor}")
+
+    # These values are deprecated, use "ro.product.cpu.abilist"
+    # instead (see below).
+    print(f"# ro.product.cpu.abi and ro.product.cpu.abi2 are obsolete,")
+    print(f"# use ro.product.cpu.abilist instead.")
+    print(f"ro.product.cpu.abi={option.cpu_abis[0]}")
+    if len(option.cpu_abis) > 1:
+      print(f"ro.product.cpu.abi2={option.cpu_abis[1]}")
+
+    if option.default_locale:
+      print(f"ro.product.locale={option.default_locale}")
+    print(f"ro.wifi.channels={' '.join(option.default_wifi_channels)}")
+
+    print(f"# ro.build.product is obsolete; use ro.product.device")
+    print(f"ro.build.product={option.device}")
+
+    print(f"# Do not try to parse description or thumbprint")
+    print(f"ro.build.description?={build_desc}")
+    if option.build_thumbprint_file:
+      build_thumbprint = option.build_thumbprint_file.read().strip()
+      print(f"ro.build.thumbprint={build_thumbprint}")
+
+    print(f"# end build properties")
+
+if __name__ == "__main__":
+  main()