Option to show list of supported sources

README.md

@@ -35,6 +35,7 @@ Options:
   --throttle                     Slow down downloading to avoid blocking your IP address by server
   --chapters=<numbers or range>  Numbers of chapters to download. Can be a single numbers or range, e.g. "1-4,8,11" or "all"
   -v, --verbose                  Show more information
+  --sources                      Show list of supported manga sources and exit
   -h, --help                     Show this message and exit
 
 Arguments:

src/main/kotlin/org/koitharu/kotatsu/dl/Main.kt

@@ -1,6 +1,7 @@
 package org.koitharu.kotatsu.dl
 
 import com.github.ajalt.clikt.command.main
+import com.github.ajalt.clikt.core.ProgramResult
 import com.github.ajalt.clikt.parameters.arguments.argument
 import com.github.ajalt.clikt.parameters.options.*
 import com.github.ajalt.clikt.parameters.types.enum
@@ -12,6 +13,7 @@ import org.koitharu.kotatsu.dl.download.DownloadFormat
 import org.koitharu.kotatsu.dl.download.MangaDownloader
 import org.koitharu.kotatsu.dl.parsers.MangaLoaderContextImpl
 import org.koitharu.kotatsu.dl.ui.askSelectBranch
+import org.koitharu.kotatsu.dl.ui.printSourcesList
 import org.koitharu.kotatsu.dl.util.AppCommand
 import org.koitharu.kotatsu.dl.util.ChaptersRange
 import org.koitharu.kotatsu.dl.util.colored
@@ -63,6 +65,16 @@ class Main : AppCommand(name = "kotatsu-dl") {
         help = "Show more information"
     ).flag(default = false)
 
+    init {
+        eagerOption(
+            names = arrayOf("--sources"),
+            help = "Show list of supported manga sources and exit"
+        ) {
+            MangaLoaderContextImpl().printSourcesList()
+            throw ProgramResult(0)
+        }
+    }
+
     override suspend fun invoke(): Int {
         val context = MangaLoaderContextImpl()
         val linkResolver = context.newLinkResolver(link)

src/main/kotlin/org/koitharu/kotatsu/dl/ui/SourcesList.kt

@@ -0,0 +1,51 @@
+package org.koitharu.kotatsu.dl.ui
+
+import org.koitharu.kotatsu.dl.util.colored
+import org.koitharu.kotatsu.parsers.MangaLoaderContext
+import org.koitharu.kotatsu.parsers.model.ContentType
+import org.koitharu.kotatsu.parsers.model.MangaParserSource
+import org.koitharu.kotatsu.parsers.util.toTitleCase
+import java.util.*
+
+fun MangaLoaderContext.printSourcesList() {
+    println("List of supported sources:")
+    val groups = MangaParserSource.entries.groupBy { it.locale }
+    for (group in groups) {
+        colored {
+            print(" - ")
+            println(group.key.toLocaleName().cyan)
+        }
+        val sources = group.value.sortedBy { it.title }
+        for (source in sources) {
+            val parser = try {
+                newParserInstance(source)
+            } catch (_: Throwable) {
+                continue
+            }
+            colored {
+                print(source.title.bold)
+                print(' ')
+                print("https://")
+                print(parser.domain)
+                print(' ')
+                when (source.contentType) {
+                    ContentType.HENTAI -> print("[Hentai]".yellow)
+                    ContentType.COMICS -> print("[Comics]".yellow)
+                    else -> Unit
+                }
+                if (source.isBroken) {
+                    print("[Broken]".red)
+                }
+                println()
+            }
+        }
+    }
+}
+
+private fun String.toLocaleName(): String {
+    if (isEmpty()) {
+        return "Multilingual"
+    }
+    val lc = Locale(this)
+    return lc.getDisplayName(lc).toTitleCase(lc)
+}