Bump version to 8.3.3

Co-authored-by: Greyson Parrelli <greyson@signal.org>

.github/workflows/docker.yml

@@ -1,21 +1,20 @@
-name: Reproducible Build Check
+name: Check reproducible-build Dockerfile
 
 on:
   schedule:
-    - cron: '0 5 * * *'
+    - cron: "0 5 * * *"
 
 permissions:
   contents: read # to fetch code (actions/checkout)
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v4
-    - name: Build image
-      run: cd reproducible-builds && docker build -t signal-android . && cd ..
-
-    - name: Test build
-      run: docker run --rm -v $(pwd):/project -w /project signal-android ./gradlew clean assemblePlayProdRelease
+      - uses: actions/checkout@v6
+      - name: Build image
+        run: |
+          cd reproducible-builds
+          docker build -t signal-android .
+      - name: Test build
+        run: docker run --memory=12g --rm -v "$(pwd)":/project -w /project signal-android ./gradlew --no-daemon --max-workers=1 -Dorg.gradle.jvmargs="-Xmx4g -XX:MaxMetaspaceSize=512m" -Dkotlin.compiler.execution.strategy=in-process bundlePlayProdRelease

.gitignore

@@ -33,3 +33,4 @@ maps.key
 kls_database.db
 .kotlin
 lefthook-local.yml
+sample-videos/

app/build.gradle.kts

@@ -1,17 +1,11 @@
 @file:Suppress("UnstableApiUsage")
 
 import com.android.build.api.dsl.ManagedVirtualDevice
-import org.gradle.api.file.DirectoryProperty
-import org.gradle.api.file.RegularFileProperty
-import org.gradle.api.provider.ValueSource
-import org.gradle.api.provider.ValueSourceParameters
-import org.gradle.api.tasks.InputDirectory
-import org.gradle.api.tasks.InputFile
-import org.gradle.api.tasks.Optional
-import org.gradle.api.tasks.PathSensitive
-import org.gradle.api.tasks.PathSensitivity
 import org.gradle.api.tasks.testing.logging.TestExceptionFormat
-import java.io.File
+import java.time.Instant
+import java.time.ZoneOffset
+import java.time.format.DateTimeFormatter
+import java.util.Locale
 import java.util.Properties
 
 plugins {
@@ -20,6 +14,7 @@ plugins {
   alias(libs.plugins.ktlint)
   alias(libs.plugins.compose.compiler)
   alias(libs.plugins.kotlinx.serialization)
+  alias(benchmarkLibs.plugins.baselineprofile)
   id("androidx.navigation.safeargs")
   id("kotlin-parcelize")
   id("com.squareup.wire")
@@ -29,8 +24,8 @@ plugins {
 
 apply(from = "static-ips.gradle.kts")
 
-val canonicalVersionCode = 1638
-val canonicalVersionName = "7.70.1"
+val canonicalVersionCode = 1667
+val canonicalVersionName = "8.3.3"
 val currentHotfixVersion = 0
 val maxHotfixVersions = 100
 
@@ -49,9 +44,16 @@ val languagesForBuildConfigProvider = languagesProvider.map { languages ->
   languages.joinToString(separator = ", ") { language -> "\"$language\"" }
 }
 
+val localPropertiesFile = File(rootProject.projectDir, "local.properties")
+val localProperties: Properties? = if (localPropertiesFile.exists()) {
+  Properties().apply { localPropertiesFile.inputStream().use { load(it) } }
+} else {
+  null
+}
+val quickstartCredentialsDir: String? = localProperties?.getProperty("quickstart.credentials.dir")
+val benchmarkBackupFile: String? = localProperties?.getProperty("benchmark.backup.file")
+
 val selectableVariants = listOf(
-  "nightlyBackupRelease",
-  "nightlyBackupSpinner",
   "nightlyProdSpinner",
   "nightlyProdPerf",
   "nightlyProdRelease",
@@ -60,6 +62,8 @@ val selectableVariants = listOf(
   "playProdSpinner",
   "playProdCanary",
   "playProdPerf",
+  "playProdMocked",
+  "playProdNonMinifiedMocked",
   "playProdBenchmark",
   "playProdInstrumentation",
   "playProdRelease",
@@ -69,8 +73,12 @@ val selectableVariants = listOf(
   "playStagingPerf",
   "playStagingInstrumentation",
   "playStagingRelease",
+  "playProdQuickstart",
+  "playStagingQuickstart",
   "websiteProdSpinner",
-  "websiteProdRelease"
+  "websiteProdRelease",
+  "githubProdSpinner",
+  "githubProdRelease"
 )
 
 wire {
@@ -174,7 +182,8 @@ android {
         "META-INF/LICENSE-notice.md",
         "META-INF/proguard/androidx-annotations.pro",
         "**/*.dylib",
-        "**/*.dll"
+        "**/*.dll",
+        "**/*.proto"
       )
     }
   }
@@ -230,8 +239,8 @@ android {
     buildConfigField("String[]", "SIGNAL_CDSI_IPS", rootProject.extra["cdsi_ips"] as String)
     buildConfigField("String[]", "SIGNAL_SVR2_IPS", rootProject.extra["svr2_ips"] as String)
     buildConfigField("String", "SIGNAL_AGENT", "\"OWA\"")
-    buildConfigField("String", "SVR2_MRENCLAVE_LEGACY", "\"093be9ea32405e85ae28dbb48eb668aebeb7dbe29517b9b86ad4bec4dfe0e6a6\"")
-    buildConfigField("String", "SVR2_MRENCLAVE", "\"29cd63c87bea751e3bfd0fbd401279192e2e5c99948b4ee9437eafc4968355fb\"")
+    buildConfigField("String", "SVR2_MRENCLAVE_LEGACY", "\"29cd63c87bea751e3bfd0fbd401279192e2e5c99948b4ee9437eafc4968355fb\"")
+    buildConfigField("String", "SVR2_MRENCLAVE", "\"1240acbd4aa26974184844c8a46b1022d3957ac8a76c1fd8f5b1a15141ee0708\"")
     buildConfigField("String[]", "UNIDENTIFIED_SENDER_TRUST_ROOTS", "new String[]{ \"BXu6QIKVz5MA8gstzfOgRQGqyLqOwNKHL6INkv3IHWMF\", \"BUkY0I+9+oPgDCn4+Ac6Iu813yvqkDr/ga8DzLxFxuk6\"}")
     buildConfigField("String", "ZKGROUP_SERVER_PUBLIC_PARAMS", "\"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\"")
     buildConfigField("String", "GENERIC_SERVER_PUBLIC_PARAMS", "\"AByD873dTilmOSG0TjKrvpeaKEsUmIO8Vx9BeMmftwUs9v7ikPwM8P3OHyT0+X3EUMZrSe9VUp26Wai51Q9I8mdk0hX/yo7CeFGJyzoOqn8e/i4Ygbn5HoAyXJx5eXfIbqpc0bIxzju4H/HOQeOpt6h742qii5u/cbwOhFZCsMIbElZTaeU+BWMBQiZHIGHT5IE0qCordQKZ5iPZom0HeFa8Yq0ShuEyAl0WINBiY6xE3H/9WnvzXBbMuuk//eRxXgzO8ieCeK8FwQNxbfXqZm6Ro1cMhCOF3u7xoX83QhpN\"")
@@ -253,7 +262,7 @@ android {
     buildConfigField("String", "STRIPE_PUBLISHABLE_KEY", "\"pk_live_6cmGZopuTsV8novGgJJW9JpC00vLIgtQ1D\"")
     buildConfigField("boolean", "TRACING_ENABLED", "false")
     buildConfigField("boolean", "LINK_DEVICE_UX_ENABLED", "false")
-    buildConfigField("boolean", "USE_STRING_ID", "true")
+    buildConfigField("boolean", "USE_STRING_ID", "false")
 
     ndk {
       abiFilters += listOf("armeabi-v7a", "arm64-v8a", "x86", "x86_64")
@@ -352,8 +361,25 @@ android {
       isDebuggable = false
       isMinifyEnabled = true
       matchingFallbacks += "debug"
+      applicationIdSuffix = ".benchmark"
+
       buildConfigField("String", "BUILD_VARIANT_TYPE", "\"Benchmark\"")
       buildConfigField("boolean", "TRACING_ENABLED", "true")
+      buildConfigField("String[]", "UNIDENTIFIED_SENDER_TRUST_ROOTS", "new String[]{ \"BVT/2gHqbrG1xzuIypLIOjFgMtihrMld1/5TGADL6Dhv\"}")
+
+      manifestPlaceholders["applicationClass"] = "org.thoughtcrime.securesms.BenchmarkApplicationContext"
+    }
+
+    create("mocked") {
+      initWith(getByName("debug"))
+      isDefault = false
+      isDebuggable = false
+      isMinifyEnabled = true
+      matchingFallbacks += "debug"
+      buildConfigField("String", "BUILD_VARIANT_TYPE", "\"Benchmark\"")
+      buildConfigField("boolean", "TRACING_ENABLED", "true")
+
+      manifestPlaceholders["applicationClass"] = "org.thoughtcrime.securesms.ApplicationContext"
     }
 
     create("canary") {
@@ -363,6 +389,14 @@ android {
       matchingFallbacks += "debug"
       buildConfigField("String", "BUILD_VARIANT_TYPE", "\"Canary\"")
     }
+
+    create("quickstart") {
+      initWith(getByName("debug"))
+      isDefault = false
+      isMinifyEnabled = false
+      matchingFallbacks += "debug"
+      buildConfigField("String", "BUILD_VARIANT_TYPE", "\"Quickstart\"")
+    }
   }
 
   productFlavors {
@@ -381,6 +415,13 @@ android {
       buildConfigField("String", "BUILD_DISTRIBUTION_TYPE", "\"website\"")
     }
 
+    create("github") {
+      dimension = "distribution"
+      buildConfigField("boolean", "MANAGES_APP_UPDATES", "false")
+      buildConfigField("String", "APK_UPDATE_MANIFEST_URL", "null")
+      buildConfigField("String", "BUILD_DISTRIBUTION_TYPE", "\"github\"")
+    }
+
     create("nightly") {
       dimension = "distribution"
       versionNameSuffix = "-nightly-untagged-${getGitHash()}"
@@ -411,8 +452,8 @@ android {
       buildConfigField("String", "SIGNAL_CDN3_URL", "\"https://cdn3-staging.signal.org\"")
       buildConfigField("String", "SIGNAL_CDSI_URL", "\"https://cdsi.staging.signal.org\"")
       buildConfigField("String", "SIGNAL_SVR2_URL", "\"https://svr2.staging.signal.org\"")
-      buildConfigField("String", "SVR2_MRENCLAVE_LEGACY", "\"2e8cefe6e3f389d8426adb24e9b7fb7adf10902c96f06f7bbcee36277711ed91\"")
-      buildConfigField("String", "SVR2_MRENCLAVE", "\"a75542d82da9f6914a1e31f8a7407053b99cc99a0e7291d8fbd394253e19b036\"")
+      buildConfigField("String", "SVR2_MRENCLAVE_LEGACY", "\"a75542d82da9f6914a1e31f8a7407053b99cc99a0e7291d8fbd394253e19b036\"")
+      buildConfigField("String", "SVR2_MRENCLAVE", "\"97f151f6ed078edbbfd72fa9cae694dcc08353f1f5e8d9ccd79a971b10ffc535\"")
       buildConfigField("String[]", "UNIDENTIFIED_SENDER_TRUST_ROOTS", "new String[]{\"BbqY1DzohE4NUZoVF+L18oUPrK3kILllLEJh2UnPSsEx\", \"BYhU6tPjqP46KGZEzRs1OL4U39V5dlPJ/X09ha4rErkm\"}")
       buildConfigField("String", "ZKGROUP_SERVER_PUBLIC_PARAMS", "\"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\"")
       buildConfigField("String", "GENERIC_SERVER_PUBLIC_PARAMS", "\"AHILOIrFPXX9laLbalbA9+L1CXpSbM/bTJXZGZiuyK1JaI6dK5FHHWL6tWxmHKYAZTSYmElmJ5z2A5YcirjO/yfoemE03FItyaf8W1fE4p14hzb5qnrmfXUSiAIVrhaXVwIwSzH6RL/+EO8jFIjJ/YfExfJ8aBl48CKHgu1+A6kWynhttonvWWx6h7924mIzW0Czj2ROuh4LwQyZypex4GuOPW8sgIT21KNZaafgg+KbV7XM1x1tF3XA17B4uGUaDbDw2O+nR1+U5p6qHPzmJ7ggFjSN6Utu+35dS1sS0P9N\"")
@@ -422,22 +463,10 @@ android {
       buildConfigField("String", "RECAPTCHA_PROOF_URL", "\"https://signalcaptchas.org/staging/challenge/generate.html\"")
       buildConfigField("org.signal.libsignal.net.Network.Environment", "LIBSIGNAL_NET_ENV", "org.signal.libsignal.net.Network.Environment.STAGING")
       buildConfigField("int", "LIBSIGNAL_LOG_LEVEL", "org.signal.libsignal.protocol.logging.SignalProtocolLogger.DEBUG")
-      buildConfigField("boolean", "USE_STRING_ID", "false")
 
       buildConfigField("String", "BUILD_ENVIRONMENT_TYPE", "\"Staging\"")
       buildConfigField("String", "STRIPE_PUBLISHABLE_KEY", "\"pk_test_sngOd8FnXNkpce9nPXawKrJD00kIDngZkD\"")
     }
-
-    create("backup") {
-      initWith(getByName("staging"))
-
-      dimension = "environment"
-
-      applicationIdSuffix = ".backup"
-
-      buildConfigField("boolean", "MANAGES_APP_UPDATES", "true")
-      buildConfigField("String", "BUILD_ENVIRONMENT_TYPE", "\"Backup\"")
-    }
   }
 
   lint {
@@ -447,6 +476,7 @@ android {
     ignoreWarnings = true
     quiet = true
     disable += "LintError"
+    lintConfig = rootProject.file("lint.xml")
   }
 
   androidComponents {
@@ -461,7 +491,7 @@ android {
 
       // Starting with minSdk 23, Android leaves native libraries uncompressed, which is fine for the Play Store, but not for our self-distributed APKs.
       // This reverts it to the legacy behavior, compressing the native libraries, and drastically reducing the APK file size.
-      if (variant.name.contains("website", ignoreCase = true)) {
+      if (variant.name.contains("website", ignoreCase = true) || variant.name.contains("github", ignoreCase = true)) {
         variant.packaging.jniLibs.useLegacyPackaging.set(true)
       }
 
@@ -478,12 +508,39 @@ android {
           val nightlyVersionCode = (canonicalVersionCode * maxHotfixVersions) + (getNightlyBuildNumber(tag) * 10) + nightlyBuffer
 
           variant.outputs.forEach { output ->
-            output.versionName.set(tag)
+            output.versionName.set("$tag | ${getLastCommitDateTimeUtc()}")
             output.versionCode.set(nightlyVersionCode)
           }
         }
       }
     }
+
+    onVariants(selector().withBuildType("quickstart")) { variant ->
+      val environment = variant.flavorName?.let { name ->
+        when {
+          name.contains("staging", ignoreCase = true) -> "staging"
+          name.contains("prod", ignoreCase = true) -> "prod"
+          else -> "prod"
+        }
+      } ?: "prod"
+
+      val taskProvider = tasks.register<CopyQuickstartCredentialsTask>("copyQuickstartCredentials${variant.name.capitalize()}") {
+        if (quickstartCredentialsDir != null) {
+          inputDir.set(File(quickstartCredentialsDir))
+        }
+        filePrefix.set("${environment}_")
+      }
+      variant.sources.assets?.addGeneratedSourceDirectory(taskProvider) { it.outputDir }
+    }
+
+    onVariants(selector().withBuildType("benchmark")) { variant ->
+      val taskProvider = tasks.register<CopyBenchmarkBackupTask>("copyBenchmarkBackup${variant.name.capitalize()}") {
+        if (benchmarkBackupFile != null) {
+          inputFile.set(File(benchmarkBackupFile))
+        }
+      }
+      variant.sources.assets?.addGeneratedSourceDirectory(taskProvider) { it.outputDir }
+    }
   }
 
   val releaseDir = "$projectDir/src/release/java"
@@ -495,6 +552,41 @@ android {
       java.srcDir(path)
     }
   }
+
+  sourceSets {
+    getByName("mocked") {
+      java.srcDir("$projectDir/src/benchmarkShared/java")
+      manifest.srcFile("$projectDir/src/benchmarkShared/AndroidManifest.xml")
+    }
+
+    getByName("benchmark") {
+      java.srcDir("$projectDir/src/benchmarkShared/java")
+      manifest.srcFile("$projectDir/src/benchmarkShared/AndroidManifest.xml")
+    }
+  }
+
+  applicationVariants.configureEach {
+    outputs.configureEach {
+      if (this is com.android.build.gradle.internal.api.BaseVariantOutputImpl) {
+        val fileVersionName = versionName.substringBefore(" |")
+        outputFileName = outputFileName.replace(".apk", "-$fileVersionName.apk")
+      }
+    }
+  }
+}
+
+baselineProfile {
+  warnings {
+    disabledVariants = false
+  }
+
+  mergeIntoMain = true
+
+  variants.create("mocked") {
+    from(project(":baseline-profile"))
+  }
+
+  dexLayoutOptimization = false
 }
 
 dependencies {
@@ -505,7 +597,7 @@ dependencies {
   implementation(project(":lib:libsignal-service"))
   implementation(project(":lib:paging"))
   implementation(project(":core:util"))
-  implementation(project(":lib:glide-config"))
+  implementation(project(":lib:glide"))
   implementation(project(":lib:video"))
   implementation(project(":lib:device-transfer"))
   implementation(project(":lib:image-editor"))
@@ -515,8 +607,12 @@ dependencies {
   implementation(project(":lib:qr"))
   implementation(project(":lib:sticky-header-grid"))
   implementation(project(":lib:photoview"))
+  implementation(project(":lib:blurhash"))
   implementation(project(":core:ui"))
   implementation(project(":core:models"))
+  implementation(project(":core:models-jvm"))
+  implementation(project(":feature:camera"))
+  implementation(project(":feature:registration"))
 
   implementation(libs.androidx.fragment.ktx)
   implementation(libs.androidx.appcompat) {
@@ -540,6 +636,8 @@ dependencies {
   implementation(libs.androidx.navigation.fragment.ktx)
   implementation(libs.androidx.navigation.ui.ktx)
   implementation(libs.androidx.navigation.compose)
+  implementation(libs.androidx.navigation3.runtime)
+  implementation(libs.androidx.navigation3.ui)
   implementation(libs.androidx.lifecycle.viewmodel.ktx)
   implementation(libs.androidx.lifecycle.livedata.ktx)
   implementation(libs.androidx.lifecycle.process)
@@ -617,6 +715,7 @@ dependencies {
   implementation(libs.kotlinx.serialization.json)
 
   implementation(project(":lib:billing"))
+  implementation(project(":feature:media-send"))
 
   "spinnerImplementation"(project(":lib:spinner"))
 
@@ -709,6 +808,16 @@ fun getNightlyBuildNumber(tag: String?): Int {
   return match?.groupValues?.get(1)?.toIntOrNull() ?: 0
 }
 
+fun getLastCommitDateTimeUtc(): String {
+  val timestamp = providers.exec {
+    commandLine("git", "log", "-1", "--pretty=format:%ct")
+  }.standardOutput.asText.get().trim().toLong()
+  val instant = Instant.ofEpochSecond(timestamp)
+  val formatter = DateTimeFormatter.ofPattern("MMM d '@' HH:mm 'UTC'", Locale.US)
+    .withZone(ZoneOffset.UTC)
+  return formatter.format(instant)
+}
+
 fun getMapsKey(): String {
   return providers
     .gradleProperty("mapsKey")
@@ -768,3 +877,62 @@ abstract class PropertiesFileValueSource : ValueSource<Properties?, PropertiesFi
 fun String.capitalize(): String {
   return this.replaceFirstChar { it.uppercase() }
 }
+
+abstract class CopyQuickstartCredentialsTask : DefaultTask() {
+  @get:InputDirectory
+  @get:Optional
+  abstract val inputDir: DirectoryProperty
+
+  @get:Input
+  abstract val filePrefix: Property<String>
+
+  @get:OutputDirectory
+  abstract val outputDir: DirectoryProperty
+
+  @TaskAction
+  fun copy() {
+    if (!inputDir.isPresent) {
+      throw GradleException("quickstart.credentials.dir is not set in local.properties. This is required for quickstart builds.")
+    }
+
+    val prefix = filePrefix.get()
+    val candidates = inputDir.get().asFile.listFiles()
+      ?.filter { it.extension == "json" && it.name.startsWith(prefix) }
+      ?: emptyList()
+
+    if (candidates.isEmpty()) {
+      throw GradleException("No credential files matching '$prefix*.json' found in ${inputDir.get().asFile}. Add files like '${prefix}account1.json' to your credentials directory.")
+    }
+
+    val chosen = candidates.random()
+    logger.lifecycle("Selected quickstart credential: ${chosen.name}")
+
+    val dest = outputDir.get().asFile.resolve("quickstart")
+    dest.mkdirs()
+    chosen.copyTo(dest.resolve(chosen.name), overwrite = true)
+  }
+}
+
+abstract class CopyBenchmarkBackupTask : DefaultTask() {
+  @get:InputFile
+  @get:Optional
+  abstract val inputFile: RegularFileProperty
+
+  @get:OutputDirectory
+  abstract val outputDir: DirectoryProperty
+
+  @TaskAction
+  fun copy() {
+    val dest = outputDir.get().asFile.resolve("backups")
+    dest.mkdirs()
+
+    if (!inputFile.isPresent) {
+      logger.lifecycle("benchmark.backup.file is not set in local.properties. Benchmark tests using backup data will crash at runtime.")
+      return
+    }
+
+    val backupFile = inputFile.get().asFile
+    logger.lifecycle("Using benchmark backup: ${backupFile.absolutePath} (${backupFile.length() / 1024}KB)")
+    backupFile.copyTo(dest.resolve("backup.binproto"), overwrite = true)
+  }
+}