generate third-party licenses at build and show them from settings

Add AboutLibraries, whose Android Gradle plugin collects the licence and
attribution of every dependency into a generated resource at build time,
and surface it under a new About section in Settings.

app/src/main/kotlin/com/subtracks/ui/AppRoot.kt

@@ -77,6 +77,7 @@ import com.subtracks.ui.playback.MiniPlayer
 import com.subtracks.ui.playback.NowPlayingRoute
 import com.subtracks.ui.playback.QueueRoute
 import com.subtracks.ui.settings.AddSourceRoute
+import com.subtracks.ui.settings.LicensesRoute
 import com.subtracks.ui.settings.SettingsRoute
 import com.subtracks.ui.theme.ArtworkTheme
 import com.subtracks.ui.theme.rememberArtworkColors
@@ -110,6 +111,7 @@ private object Routes {
     const val LIBRARY = "library"
     const val SETTINGS = "settings"
     const val DOWNLOADS = "downloads"
+    const val LICENSES = "licenses"
     const val ADD_SERVER = "add-server"
     const val EDIT_SERVER = "edit-server/{sourceId}"
     const val ALBUM_DETAIL = "album/{albumId}?coverArt={coverArt}"
@@ -358,6 +360,7 @@ private fun MainNavigation() {
                         SettingsRoute(
                             onAddServer = { navController.navigate(Routes.ADD_SERVER) },
                             onOpenDownloads = { navController.navigate(Routes.DOWNLOADS) },
+                            onOpenLicenses = { navController.navigate(Routes.LICENSES) },
                             onEditServer = { id -> navController.navigate(Routes.editServer(id)) },
                             onBack = { navController.popBackStack() },
                         )
@@ -365,6 +368,9 @@ private fun MainNavigation() {
                     composable(Routes.DOWNLOADS) {
                         DownloadsRoute(onBack = { navController.popBackStack() })
                     }
+                    composable(Routes.LICENSES) {
+                        LicensesRoute(onBack = { navController.popBackStack() })
+                    }
                     composable(
                         route = Routes.ALBUM_DETAIL,
                         arguments =

app/src/main/kotlin/com/subtracks/ui/settings/LicensesScreen.kt

@@ -0,0 +1,55 @@
+package com.subtracks.ui.settings
+
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.rounded.ArrowBack
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import com.mikepenz.aboutlibraries.Libs
+import com.mikepenz.aboutlibraries.ui.compose.android.produceLibraries
+import com.mikepenz.aboutlibraries.ui.compose.m3.LibrariesContainer
+import com.subtracks.R
+
+@Composable
+fun LicensesRoute(
+    onBack: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    val libs by produceLibraries(R.raw.aboutlibraries)
+    LicensesScreen(libs = libs, onBack = onBack, modifier = modifier)
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun LicensesScreen(
+    libs: Libs?,
+    onBack: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Scaffold(
+        modifier = modifier,
+        topBar = {
+            TopAppBar(
+                title = { Text("Licenses") },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Rounded.ArrowBack, contentDescription = "Back")
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        LibrariesContainer(
+            libraries = libs,
+            modifier = Modifier.fillMaxSize().padding(padding),
+        )
+    }
+}

app/src/main/kotlin/com/subtracks/ui/settings/SettingsScreen.kt

@@ -62,6 +62,7 @@ private enum class SettingsDialog { WifiQuality, MobileQuality, DownloadQuality,
 fun SettingsRoute(
     onAddServer: () -> Unit,
     onOpenDownloads: () -> Unit,
+    onOpenLicenses: () -> Unit,
     onEditServer: (Long) -> Unit,
     onBack: () -> Unit,
     viewModel: SettingsViewModel = koinViewModel(),
@@ -96,6 +97,7 @@ fun SettingsRoute(
         onOfflineChange = viewModel::setOfflineMode,
         onAddServer = onAddServer,
         onOpenDownloads = onOpenDownloads,
+        onOpenLicenses = onOpenLicenses,
         onBack = onBack,
     )
 }
@@ -123,6 +125,7 @@ fun SettingsScreen(
     onOfflineChange: (Boolean) -> Unit = {},
     onAddServer: () -> Unit,
     onOpenDownloads: () -> Unit,
+    onOpenLicenses: () -> Unit,
     onBack: () -> Unit,
     modifier: Modifier = Modifier,
 ) {
@@ -277,6 +280,14 @@ fun SettingsScreen(
                     colors = ListItemDefaults.colors(containerColor = Color.Transparent),
                 )
             }
+            item { SectionHeader("About") }
+            item {
+                ListItem(
+                    headlineContent = { Text("Licenses") },
+                    modifier = Modifier.clickable(onClick = onOpenLicenses),
+                    colors = ListItemDefaults.colors(containerColor = Color.Transparent),
+                )
+            }
             item { Spacer(Modifier.height(fill)) }
         }
     }