Automated migration of Android apps to Bazel build system - Droidcon SF 2022

Migrating large projects that consist of hundreds or thousands of modules and being maintained by a large team, from Gradle to Bazel might be challenging. The talk describes the process of automation of the migration that includes the development and usage of a Gradle plugin as well as a type-safe and declarative Kotlin DSL for Bazel code generation.
An automated migration can save a lot of time and effort for organizations by making the transition to Bazel build system smoothly and allow to enjoy the benefits Bazel provides much sooner.
The ideas discussed in this talk were used in the project for automated migration to Bazel, called Airin: https://github.com/Morfly/airin
More information about it could be found in the talk from BazelCon 2021: https://youtu.be/dz-CFEwJuko
Or in this blog post: https://proandroiddev.com/304fa8b3680c
Source code with the example project: https://github.com/Morfly/android-bazel-migration-sample

Transcript

1. Automated migration of Android apps to Bazel build system Pavlo Stavytskyi
2. About me • Mobile infra at Lyft • Grab, Singapore • Google Developer Expert for Android • 6 years of Android development 2
3. Agenda • What is Bazel? 3
4. Agenda • What is Bazel? • Creating a simple Gradle plugin for migration of Android app to Bazel 4
5. Agenda • What is Bazel? • Creating a simple Gradle plugin for migration of Android app to Bazel • See a type-safe Kotlin DSL for generating Bazel scripts 5
6. What is Bazel?
7. What is Bazel? • Build tool (similarly to Gradle) 7
8. What is Bazel? • Build tool (similarly to Gradle) • Polyglot. Extensible 8
9. What is Bazel? • Build tool (similarly to Gradle) • Polyglot. Extensible • Granularity. Incremental builds 9
10. What is Bazel? • Build tool (similarly to Gradle) • Polyglot. Extensible • Granularity. Incremental builds • Remote build cache/execution 10
11. What is Bazel? • Build tool (similarly to Gradle) • Polyglot. Extensible • Granularity. Incremental builds • Remote build cache/execution • Query language 11
12. What is it like to work with Bazel?
13. plugins { id 'com.android.application' id 'kotlin-android' } android { compileSdkVersion 30 defaultConfig { applicationId "com.morfly.sample" minSdkVersion 21 targetSdkVersion 30 } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } kotlinOptions { jvmTarget = '1.8' } } dependencies { implementation "org.jetbrains.kotlin:kotlin-stdlib:1.5.10" implementation 'androidx.core:core-ktx:1.6.0' implementation 'androidx.appcompat:appcompat:1.3.1' implementation 'com.google.android.material:material:1.4.0' implementation 'androidx.constraintlayout:constraintlayout:2.1.0' } Gradle script example 13
14. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Gradle script example 14
15. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 15
16. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 16
17. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 17
18. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 18
19. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 19
20. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 20
21. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 21
22. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 22
23. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 23
24. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "my_lib", srcs = glob([ "src/main/java/**/*.kt", "src/main/kotlin/**/*.kt", ]), custom_package = "com.morfly.sample", manifest = "src/main/AndroidManifest.xml", resource_files = glob(["src/main/res/**"]), deps = [ artifact("androidx.core:core-ktx"), artifact("androidx.appcompat:appcompat"), artifact("com.google.android.material:material"), artifact("androidx.constraintlayout:constraintlayout"), ], ) Bazel script components 24
25. What does the migration mean?
26. What does the migration mean? build.gradle 26 build.gradle.kts BUILD.bazel
27. What does the migration mean? 27 ./gradlew app:assembleDebug bazel build app
28. Writing custom Gradle plugin for automated migration to Bazel
29. Creating Gradle plugin Gradle plugin 29
30. Creating Gradle plugin Gradle plugin Gradle task 30
31. ./gradlew migrateToBazel Gradle task 31
32. Creating Gradle plugin Gradle plugin Gradle task Bazel file templates 32
33. Gradle task purpose 33 For each project module…
34. Gradle task purpose 34 For each project module… Get module dependencies
35. Gradle task purpose 35 For each project module… Get module dependencies Determine Bazel module type
36. Bazel module types • Kotlin Android module — kt_android_library 36
37. Bazel module types • Kotlin Android module • Pure Java Android module — android_library 37
38. Bazel module types • Kotlin Android module • Pure Java Android module • Kotlin library module — kt_jvm_library 38
39. Bazel module types • Kotlin Android module • Pure Java Android module • Kotlin library module • Pure Java library module — java_library ... 39
40. Gradle task purpose 40 For each project module… Get module dependencies Determine Bazel module type Generate Bazel file from a template
41. Coding time...
42. Android application 42
43. import org.gradle.api.Plugin import org.gradle.api.Project import org.gradle.kotlin.dsl.register class MigrationPlugin : Plugin<Project> { override fun apply(target: Project) { target.tasks.register<MigrateToBazelTask>("migrateToBazel") } } Creating Gradle plugin 43
44. import org.gradle.api.Plugin import org.gradle.api.Project import org.gradle.kotlin.dsl.register class MigrationPlugin : Plugin<Project> { override fun apply(target: Project) { target.tasks.register<MigrateToBazelTask>("migrateToBazel") } } Creating Gradle plugin 44
45. import org.gradle.api.Plugin import org.gradle.api.Project import org.gradle.kotlin.dsl.register class MigrationPlugin : Plugin<Project> { override fun apply(target: Project) { target.tasks.register<MigrateToBazelTask>("migrateToBazel") } } Registering Gradle task 45
46. import org.gradle.api.Plugin import org.gradle.api.Project import org.gradle.kotlin.dsl.register class MigrationPlugin : Plugin<Project> { override fun apply(target: Project) { target.tasks.register<MigrateToBazelTask>("migrateToBazel") } } Registering Gradle task 46
47. import org.gradle.api.Plugin import org.gradle.api.Project import org.gradle.kotlin.dsl.register class MigrationPlugin : Plugin<Project> { override fun apply(target: Project) { target.tasks.register<MigrateToBazelTask>("migrateToBazel") } } Registering Gradle task 47
48. ./gradlew migrateToBazel Registering Gradle task 48
49. import org.gradle.api.DefaultTask import org.gradle.api.tasks.TaskAction open class MigrateToBazelTask : DefaultTask() { @TaskAction fun migrateToBazel() { ... } } Writing Gradle task 49
50. Demo
51. Migration complications
52. Migration complications • Iterative process 52
53. Migration complications • Iterative process • Gradle plugins 53
54. Migration complications • Iterative process • Gradle plugins • Edge cases 54
55. Type-safe DSL for Bazel script generation
56. fun android_library_template( name: String, packageName: String, artifactDeps: String, moduleDeps: String ) = """ load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = "$name", srcs = glob(["src/main/java/**/*.kt"]), resource_files = glob(["src/main/res/**"]), custom_package = "$packageName", manifest = "src/main/AndroidManifest.xml", visibility = ["./visibility:public"], deps = [ "./:dagger", $moduleDeps, $artifactDeps ], ) """ Bazel file template 56
57. fun android_library_build( name: String, packageName: String, artifactDeps: List<String>, moduleDeps: List<String> ) = BUILD.bazel { load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") load("@rules_jvm_external./:defs.bzl", "artifact") kt_android_library( name = name, srcs = glob("src/main/java/**/*.kt"), resource_files = glob("src/main/res/**"), custom_package = packageName, manifest = "src/main/AndroidManifest.xml", visibility = list["./visibility:public"], deps = moduleDeps + artifactDeps.map { artifact(it) } ) } Type-safe Bazel file template 57
58. BUILD.bazel { ... } Entering Starlark DSL context 58
59. Code snippets notation further Kotlin (Starlark DSL) Starlark (Bazel script) 59
60. load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") Starlark DSL components load statement 60
61. BUILD.bazel { load("@io_bazel_rules_kotlin./kotlin:kotlin.bzl", "kt_android_library") ... } Starlark DSL components load statement 61
62. NAME = "app" Starlark DSL components Variable assignment 62
63. NAME = "app" SRCS = ["MainActivity.java", "MainViewModel.java"] Starlark DSL components Variable assignment 63
64. NAME = "app" SRCS = ["MainActivity.java", "MainViewModel.java"] MANIFEST_VALUES = {"minSdkVersion": "21"} Starlark DSL components Variable assignment 64
65. BUILD.bazel { val NAME by "app" ... } Starlark DSL components Variable assignment 65
66. BUILD.bazel { val NAME by "app" val SRCS by list["MainActivity.java", "MainViewModel.java"] ... } Starlark DSL components Variable assignment 66
67. BUILD.bazel { val NAME by "app" val SRCS by list["MainActivity.java", "MainViewModel.java"] val MANIFEST_VALUES by dict { "minSdkVersion" to "21" } ... } Starlark DSL components Variable assignment 67
68. SRCS = ["MainActivity.java"] + ["ViewModel.java"] Starlark DSL components Concatenation 68
69. BUILD.bazel { val SRCS by list["MainActivity.java"] `+` list["MainViewModel.java"] ... } Starlark DSL components Concatenation 69
70. BUILD.bazel { val SRCS by list["MainActivity.java"] `+` list["MainViewModel.java"] ... } Starlark DSL components Concatenation 70
71. BUILD.bazel { val SRCS: List<String> by list["MainActivity.java"] `+` "MainViewModel.java" ... } Starlark DSL components Concatenation 71
72. BUILD.bazel { val SRCS: List<String> by list["MainActivity.java"] `+` "MainViewModel.java" Compilation error: Required: List Found: String ... } Starlark DSL components Concatenation 72
73. [i + i for i in LIST] Starlark DSL components List comprehensions 73
74. [<expression> for <item> in <list>] Starlark DSL components List comprehension syntax 74
75. BUILD.bazel { "i" `in` LIST take { it `+` it } ... } Starlark DSL components List comprehensions 75
76. BUILD.bazel { "i" `in` LIST take { it `+` it } ... } Starlark DSL components List comprehensions <item> 76
77. BUILD.bazel { "i" `in` LIST take { it `+` it } ... } Starlark DSL components List comprehensions <list> 77
78. BUILD.bazel { "i" `in` LIST take { it `+` it } ... } Starlark DSL components List comprehensions <expression> 78
79. [i + i for i in LIST] Starlark DSL components List comprehensions 79
80. SRCS = ["MainActivity.java"] android_binary( name = "app", srcs = SRCS + ["utils/StringUtils.java"] ) Starlark DSL components Build rules and functions 80
81. BUILD.bazel { val SRCS by list["MainActivity.java"] android_binary( name = "app", srcs = SRCS `+` list["utils/StringUtils.java"] ) ... } Starlark DSL components Build rules and functions 81
82. VIEW_MODELS_WITH_RES_IMPORTS = ["MainViewModel.kt", ...] [ genrule( name = "modify_imports_in_" + file[0:-3], srcs = [file], outs = [file[0:-3] + "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import com.morfly.R/import com.morfly.viewmodels.R/g' > $(OUTS) """, ) for file in VIEW_MODELS_WITH_RES_IMPORTS ] APP_FILES = [ "modify_imports_in_" + file[0:-3] for file in VIEW_MODELS_WITH_RES_IMPORTS ] Starlark DSL components Putting it all together… 82
83. VIEW_MODELS_WITH_RES_IMPORTS = ["MainViewModel.kt", ...] [ genrule( name = "modify_imports_in_" + file[0:-3], srcs = [file], outs = [file[0:-3] + "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import com.morfly.R/import com.morfly.viewmodels.R/g' > $(OUTS) """, ) for file in VIEW_MODELS_WITH_RES_IMPORTS ] APP_FILES = [ "modify_imports_in_" + file[0:-3] for file in VIEW_MODELS_WITH_RES_IMPORTS ] Starlark DSL components Putting it all together… 83
84. VIEW_MODELS_WITH_RES_IMPORTS = ["MainViewModel.kt", ...] [ genrule( name = "modify_imports_in_" + file[0:-3], srcs = [file], outs = [file[0:-3] + "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import com.morfly.R/import com.morfly.viewmodels.R/g' > $(OUTS) """, ) for file in VIEW_MODELS_WITH_RES_IMPORTS ] APP_FILES = [ "modify_imports_in_" + file[0:-3] for file in VIEW_MODELS_WITH_RES_IMPORTS ] Starlark DSL components Putting it all together… 84
85. VIEW_MODELS_WITH_RES_IMPORTS = ["MainViewModel.kt", ...] [ genrule( name = "modify_imports_in_" + file[0:-3], srcs = [file], outs = [file[0:-3] + "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import com.morfly.R/import com.morfly.viewmodels.R/g' > $(OUTS) """, ) for file in VIEW_MODELS_WITH_RES_IMPORTS ] APP_FILES = [ "modify_imports_in_" + file[0:-3] for file in VIEW_MODELS_WITH_RES_IMPORTS ] Starlark DSL components Putting it all together… 85
86. VIEW_MODELS_WITH_RES_IMPORTS = ["MainViewModel.kt", ...] [ genrule( name = "modify_imports_in_" + file[0:-3], srcs = [file], outs = [file[0:-3] + "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import com.morfly.R/import com.morfly.viewmodels.R/g' > $(OUTS) """, ) for file in VIEW_MODELS_WITH_RES_IMPORTS ] APP_FILES = [ "modify_imports_in_" + file[0:-3] for file in VIEW_MODELS_WITH_RES_IMPORTS ] Starlark DSL components Putting it all together… 86
87. VIEW_MODELS_WITH_RES_IMPORTS = ["MainViewModel.kt", ...] [ genrule( name = "modify_imports_in_" + file[0:-3], srcs = [file], outs = [file[0:-3] + "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import com.morfly.R/import com.morfly.viewmodels.R/g' > $(OUTS) """, ) for file in VIEW_MODELS_WITH_RES_IMPORTS ] APP_FILES = [ "modify_imports_in_" + file[0:-3] for file in VIEW_MODELS_WITH_RES_IMPORTS ] Starlark DSL components Putting it all together… 87
88. VIEW_MODELS_WITH_RES_IMPORTS = ["MainViewModel.kt", ...] [ genrule( name = "modify_imports_in_" + file[0:-3], srcs = [file], outs = [file[0:-3] + "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import com.morfly.R/import com.morfly.viewmodels.R/g' > $(OUTS) """, ) for file in VIEW_MODELS_WITH_RES_IMPORTS ] APP_FILES = [ "modify_imports_in_" + file[0:-3] for file in VIEW_MODELS_WITH_RES_IMPORTS ] Starlark DSL components Putting it all together… 88
89. VIEW_MODELS_WITH_RES_IMPORTS = ["MainViewModel.kt", ...] [ genrule( name = "modify_imports_in_" + file[0:-3], srcs = [file], outs = [file[0:-3] + "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import com.morfly.R/import com.morfly.viewmodels.R/g' > $(OUTS) """, ) for file in VIEW_MODELS_WITH_RES_IMPORTS ] APP_FILES = [ "modify_imports_in_" + file[0:-3] for file in VIEW_MODELS_WITH_RES_IMPORTS ] Starlark DSL components Putting it all together… 89
90. fun android_library_build( packageName: String, ... ) = BUILD { val VIEW_MODELS_WITH_RES_IMPORTS by list["MainViewModel.kt", ...] "file" `in` VIEW_MODELS_WITH_RES_IMPORTS take { file .> genrule( name = "modify_imports_in_" `+` file[0..-3], srcs = list[file], outs = list[file[0..-3] `+` "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import $packageName.R/import $packageName.viewmodels.R/g' > $(OUTS) """.trimIndent() ) } val APP_FILES by ("file" `in` VIEW_MODELS_WITH_RES_IMPORTS take { "modify_imports_in_" `+` it[0..-3] }) } Starlark DSL components Putting it all together… 90
91. fun android_library_build( packageName: String, ... ) = BUILD { val VIEW_MODELS_WITH_RES_IMPORTS by list["MainViewModel.kt", ...] "file" `in` VIEW_MODELS_WITH_RES_IMPORTS take { file .> genrule( name = "modify_imports_in_" `+` file[0..-3], srcs = list[file], outs = list[file[0..-3] `+` "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import $packageName.R/import $packageName.viewmodels.R/g' > $(OUTS) """.trimIndent() ) } val APP_FILES by ("file" `in` VIEW_MODELS_WITH_RES_IMPORTS take { "modify_imports_in_" `+` it[0..-3] }) } Starlark DSL components Putting it all together… 91
92. fun android_library_build( packageName: String, ... ) = BUILD { val VIEW_MODELS_WITH_RES_IMPORTS by list["MainViewModel.kt", ...] "file" `in` VIEW_MODELS_WITH_RES_IMPORTS take { file .> genrule( name = "modify_imports_in_" `+` file[0..-3], srcs = list[file], outs = list[file[0..-3] `+` "_synthetic.kt"], cmd = """ cat $(SRCS) | sed 's/import $packageName.R/import $packageName.viewmodels.R/g' > $(OUTS) """.trimIndent() ) } val APP_FILES by ("file" `in` VIEW_MODELS_WITH_RES_IMPORTS take { "modify_imports_in_" `+` it[0..-3] }) } Starlark DSL components Putting it all together… 92
93. Conclusions
94. Conclusions Auto-migration components 94 • Gradle Plugin
95. Conclusions Auto-migration components • Gradle Plugin • Type-safe DSL for Bazel script generation 95
96. Source code 96 Sample project source code github.com/morfly/ android-bazel-migration-sample
97. Source code 97 A tool for auto-migration to Bazel github.com/morfly/airin Sample project source code github.com/morfly/ android-bazel-migration-sample