contrib/make_download: add "source-only" tarball

contrib/make_download

@@ -35,15 +35,18 @@ string = string.replace("##VERSION_MAC##", version_mac)
 string = string.replace("##VERSION_ANDROID##", version_android)
 string = string.replace("##VERSION_APK##", APK_VERSION)
 
+# note: all dist files need to be listed here that we expect sigs for,
+#       even if they are not linked to from the website
 files = {
-    'tgz': "Electrum-%s.tar.gz" % version,
-    'appimage': "electrum-%s-x86_64.AppImage" % version,
-    'mac': "electrum-%s.dmg" % version_mac,
-    'win': "electrum-%s.exe" % version_win,
-    'win_setup': "electrum-%s-setup.exe" % version_win,
-    'win_portable': "electrum-%s-portable.exe" % version_win,
-    'apk_arm64': "Electrum-%s-arm64-v8a-release.apk" % APK_VERSION,
-    'apk_armeabi': "Electrum-%s-armeabi-v7a-release.apk" % APK_VERSION,
+    "tgz": f"Electrum-{version}.tar.gz",
+    "tgz_srconly": f"Electrum-sourceonly-{version}.tar.gz",
+    "appimage": f"electrum-{version}-x86_64.AppImage",
+    "mac": f"electrum-{version_mac}.dmg",
+    "win": f"electrum-{version_win}.exe",
+    "win_setup": f"electrum-{version_win}-setup.exe",
+    "win_portable": f"electrum-{version_win}-portable.exe",
+    "apk_arm64": f"Electrum-{APK_VERSION}-arm64-v8a-release.apk",
+    "apk_armeabi": f"Electrum-{APK_VERSION}-armeabi-v7a-release.apk",
 }
 
 # default signers