Make config.prop optional

app/build.gradle.kts

@@ -20,12 +20,12 @@ android {
         applicationId = "com.topjohnwu.magisk"
         vectorDrawables.useSupportLibrary = true
         multiDexEnabled = true
-        versionName = Config["appVersion"]
-        versionCode = Config["appVersionCode"]?.toInt()
-        buildConfigField("int", "LATEST_MAGISK", Config["versionCode"] ?: "Integer.MAX_VALUE")
+        versionName = Config.appVersion
+        versionCode = Config.appVersionCode
+        buildConfigField("int", "LATEST_MAGISK", Config.magiskVersionCode.toString())
 
         javaCompileOptions.annotationProcessorOptions.arguments(
-                mapOf("room.incremental" to "true")
+            mapOf("room.incremental" to "true")
         )
     }
 

build.py

@@ -116,6 +116,10 @@ def system(cmd):
     return subprocess.run(cmd, shell=True, stdout=STDOUT)
 
 
+def cmd_out(cmd):
+    return subprocess.check_output(cmd).strip().decode('utf-8')
+
+
 def xz(data):
     return lzma.compress(data, preset=9, check=lzma.CHECK_NONE)
 
@@ -129,37 +133,39 @@ def parse_props(file):
             prop = line.split('=')
             if len(prop) != 2:
                 continue
-            props[prop[0].strip(' \t\r\n')] = prop[1].strip(' \t\r\n')
+            value = prop[1].strip(' \t\r\n')
+            if len(value) == 0:
+                continue
+            props[prop[0].strip(' \t\r\n')] = value
     return props
 
 
 def load_config(args):
-    # Load prop file
-    if not op.exists(args.config):
-        error(f'Please make sure {args.config} exists')
+    commit_hash = cmd_out(['git', 'rev-parse', '--short=8', 'refs/heads/master'])
+    commit_count = cmd_out(['git', 'rev-list', '--count', 'refs/heads/master'])
 
     # Some default values
+    config['version'] = commit_hash
+    config['versionCode'] = 2147483647
+    config['appVersion'] = commit_hash
+    config['appVersionCode'] = commit_count
     config['outdir'] = 'out'
     config['prettyName'] = 'false'
     config['keyStore'] = 'release-key.jks'
 
-    config.update(parse_props(args.config))
+    # Load prop file
+    if op.exists(args.config):
+        config.update(parse_props(args.config))
 
     # Sanitize configs
 
     config['prettyName'] = config['prettyName'].lower() == 'true'
 
-    if 'version' not in config or 'versionCode' not in config:
-        error('Config error: "version" and "versionCode" is required')
-
     try:
         config['versionCode'] = int(config['versionCode'])
     except ValueError:
         error('Config error: "versionCode" is required to be an integer')
 
-    if args.release and not op.exists(config['keyStore']):
-        error(f'Config error: assign "keyStore" to a java keystore')
-
     mkdir_p(config['outdir'])
     global STDOUT
     STDOUT = None if args.verbose else subprocess.DEVNULL
@@ -295,10 +301,15 @@ def build_binary(args):
 
     header('* Building binaries: ' + ' '.join(args.target))
 
-    config_stat = os.stat(args.config)
+    update_flags = True
     flags = op.join('native', 'jni', 'include', 'flags.hpp')
-    if config_stat.st_mtime_ns > os.stat(flags).st_mtime_ns:
-        os.utime(flags, ns=(config_stat.st_atime_ns, config_stat.st_mtime_ns))
+
+    if op.exists(args.config):
+        config_stat = os.stat(args.config)
+        update_flags = config_stat.st_mtime_ns > os.stat(flags).st_mtime_ns
+
+    if update_flags:
+        os.utime(flags)
 
     # Basic flags
     global base_flags
@@ -567,7 +578,7 @@ parser.add_argument('-r', '--release', action='store_true',
 parser.add_argument('-v', '--verbose', action='store_true',
                     help='verbose output')
 parser.add_argument('-c', '--config', default='config.prop',
-                    help='override config file (default: config.prop)')
+                    help='set config file (default: config.prop)')
 subparsers = parser.add_subparsers(title='actions')
 
 all_parser = subparsers.add_parser(

buildSrc/build.gradle.kts

@@ -13,3 +13,7 @@ gradlePlugin {
         }
     }
 }
+
+dependencies {
+    implementation("org.eclipse.jgit:org.eclipse.jgit:5.10.0.202012080955-r")
+}

buildSrc/src/main/java/BuildSource.kt

@@ -1,5 +1,6 @@
 
-import org.gradle.api.GradleException
+import org.eclipse.jgit.api.Git
+import org.eclipse.jgit.internal.storage.file.FileRepository
 import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.kotlin.dsl.provideDelegate
@@ -7,19 +8,33 @@ import java.io.File
 import java.util.*
 
 private val props = Properties()
+private lateinit var commitHash: String
+private var commitCount = 0
 
 object Config {
-    operator fun get(key: String) = props[key] as? String
-    fun contains(key: String) = props.containsKey(key)
+    operator fun get(key: String) : String? {
+        val v = props[key] as? String ?: return null
+        return if (v.isBlank()) null else v
+    }
+    fun contains(key: String) = get(key) != null
+
+    val appVersion: String get() = get("appVersion") ?: commitHash
+    val appVersionCode: Int get() = get("appVersionCode")?.toInt() ?: commitCount
+    val magiskVersionCode: Int get() = get("versionCode")?.toInt() ?: Int.MAX_VALUE
 }
 
 class MagiskPlugin : Plugin<Project> {
     override fun apply(project: Project) {
         val configPath: String? by project
-        val file = configPath?.let { File(it) } ?: project.file("config.prop")
-        if (!file.exists())
-            throw GradleException("Please setup config.prop")
+        val config = configPath?.let { File(it) } ?: project.file("config.prop")
+        if (config.exists())
+            config.inputStream().use { props.load(it) }
 
-        file.inputStream().use { props.load(it) }
+        if (!Config.contains("appVersion") || !Config.contains("appVersionCode")) {
+            val repo = FileRepository(project.rootProject.file(".git"))
+            val refId = repo.refDatabase.exactRef("refs/heads/master").objectId
+            commitHash = repo.newObjectReader().abbreviate(refId, 8).name()
+            commitCount = Git(repo).log().add(refId).call().count()
+        }
     }
 }

config.prop.sample

@@ -1,3 +1,8 @@
+##########################################################
+# All variables in config.prop are optional
+# Removing or leaving them blank will keep default values
+##########################################################
+
 # The version name and version code of Magisk
 version=
 versionCode=
@@ -6,16 +11,28 @@ versionCode=
 appVersion=
 appVersionCode=
 
-outdir=out
+# Output path
+outdir=
 
-# Whether use pretty names for zips, e.g. Magisk-v${version}.zip, Magisk-uninstaller-${date}.zip
-# The default output names are magisk-${release/debug/uninstaller}.zip
-prettyName=false
+################################################################
+# Whether to use pretty names for zips
+# e.g. Magisk-v${version}.zip, Magisk-uninstaller-${date}.zip
+# Default names are magisk-${release/debug/uninstaller}.zip
+################################################################
 
-# Only used when building with release flag
-# These passwords are used along with keyStore to sign APKs and zips
-# keyPass is the pwd for the specified keyAlias
-keyStore=release-key.jks
+# The value is either true or false
+prettyName=
+
+#####################################################
+# Signing configs for signing zips and APKs
+# These 4 variables has to be either all set or not
+#####################################################
+
+# Path to keystore file
+keyStore=
+# Keystore password
 keyStorePass=
+# The desired key alias in the keystore
 keyAlias=
+# Password of specified key alias
 keyPass=