Fix: make Arch be able to use _configfile (#239)

* prepare: fix custom _configfile usage for Arch

* Remove yes from localmodconfig make call

* customization.cfg: tell that modprobed-db can prompt the user

* prepare: reset LOCALVERSION in .config to empty string

Using a kernelconfig.new with a LOCALVERSION set makes the script
set it twice in the package name.

customization.cfg

@@ -42,6 +42,7 @@ _force_all_threads="true"
 _noccache="false"
 
 # Set to true to use modprobed db to clean config from unneeded modules. Speeds up compilation considerably. Requires root - https://wiki.archlinux.org/index.php/Modprobed-db
+# Using this option can trigger user prompts if the config doesn't go smoothly.
 # !!!! Make sure to have a well populated db !!!! - Leave empty to be asked about it at build time
 _modprobeddb="false"
 

linux-tkg-config/prepare

@@ -362,6 +362,8 @@ _tkg_srcprep() {
   scripts/setlocalversion --save-scmversion
 
   if [ "${_distro}" = "Arch" ]; then
+    # Reset local version string if ever it's in the .config file
+    scripts/config --set-str localversion ""
 
     echo "-$pkgrel-tkg-${_cpusched}${_compiler_name}" > localversion.10-pkgrel
     echo -e "Version tail set to \"-$pkgrel-tkg-${_cpusched}${_compiler_name}\"\n" > "$_where"/prepare.log
@@ -534,17 +536,18 @@ _tkg_srcprep() {
       cat "${srcdir}"/config.x86_64 > ./.config
     else
       if [ -f /boot/config-`uname -r` ];then
-        _msg="Using /boot/config-`uname -r` as config file"
+        msg2 "Using /boot/config-`uname -r` as config file"
         cp /boot/config-`uname -r` .config
       elif [ -f /proc/config.gz ];then
-        _msg="Using /proc/config.gz as config file"
+        msg2 "Using /proc/config.gz as config file"
         zcat --verbose /proc/config.gz > .config
       else
-        _msg="Current kernel config not found! Falling back to default..."
+        msg2 "Current kernel config not found! Falling back to default..."
       fi
     fi
   else
-    cat "${srcdir}/${_configfile}" > ./.config
+    msg2 "Using user-provided config file in ${_where}/${_configfile}"
+    cat "${_where}/${_configfile}" > ./.config
   fi
 
   if [ -z $_debug ]; then
@@ -1325,7 +1328,7 @@ CONFIG_DEBUG_INFO_BTF_MODULES=y\n
       msg2 "modprobed-db database not found"
       exit 1
     fi
-    yes "" | make LSMOD=$_modprobeddb_db_path localmodconfig ${llvm_opt}
+    make LSMOD=$_modprobeddb_db_path localmodconfig ${llvm_opt}
   fi
 
   if [ true = "$_config_fragments" ]; then