Make stage-1/2 logging unconditional, and drop log level to "debug"

Using "debug" level prevents spamming the console with messages twice
(once directly and once via kmsg).

nixos/modules/system/boot/stage-1-init.sh

···
 mkdir -p /run
 mount -t tmpfs -o "mode=0755,size=@runSize@" tmpfs /run
 
-# Optionally log the script output to /dev/kmsg or /run/log/stage-1-init.log 
-if test -n "@logCommands@"; then
-    mkdir -p /tmp
-    mkfifo /tmp/stage-1-init.log.fifo
-    logOutFd=8 && logErrFd=9
-    eval "exec $logOutFd>&1 $logErrFd>&2"
-    if test -w /dev/kmsg; then
-        tee -i < /tmp/stage-1-init.log.fifo /proc/self/fd/"$logOutFd" | while read line; do
-            if test -n "$line"; then
-                echo "stage-1-init: $line" > /dev/kmsg
-            fi
-        done &
-    else
-        mkdir -p /run/log
-        tee -i < /tmp/stage-1-init.log.fifo /run/log/stage-1-init.log &
-    fi
-    exec > /tmp/stage-1-init.log.fifo 2>&1
+
+# Optionally log the script output to /dev/kmsg or /run/log/stage-1-init.log.
+mkdir -p /tmp
+mkfifo /tmp/stage-1-init.log.fifo
+logOutFd=8 && logErrFd=9
+eval "exec $logOutFd>&1 $logErrFd>&2"
+if test -w /dev/kmsg; then
+    tee -i < /tmp/stage-1-init.log.fifo /proc/self/fd/"$logOutFd" | while read line; do
+        if test -n "$line"; then
+            echo "<7>stage-1-init: $line" > /dev/kmsg
+        fi
+    done &
+else
+    mkdir -p /run/log
+    tee -i < /tmp/stage-1-init.log.fifo /run/log/stage-1-init.log &
 fi
+exec > /tmp/stage-1-init.log.fifo 2>&1
+
 
 # Process the kernel command line.
 export stage2Init=/init

nixos/modules/system/boot/stage-1.nix

···
 
     inherit (config.boot) resumeDevice devSize runSize;
 
-    inherit (config.boot.initrd) checkJournalingFS 
-      logCommands preLVMCommands preDeviceCommands postDeviceCommands postMountCommands kernelModules;
+    inherit (config.boot.initrd) checkJournalingFS
+      preLVMCommands preDeviceCommands postDeviceCommands postMountCommands kernelModules;
 
     resumeDevices = map (sd: if sd ? device then sd.device else "/dev/disk/by-label/${sd.label}")
                     (filter (sd: (sd ? label || hasPrefix "/dev/" sd.device) && !sd.randomEncryption) config.swapDevices);
···
         Specify here the device where the file resides.
         You should also use <varname>boot.kernelParams</varname> to specify
         <literal><replaceable>resume_offset</replaceable></literal>.
-      '';
-    };
-
-    boot.initrd.logCommands = mkOption {
-      default = false;
-      type = types.bool;
-      description = ''
-        Whether to replicate command output of stage-1 booting to <filename>/dev/kmsg</filename> or <filename>/run/log/stage-1-init.log</filename> if <filename>/dev/kmsg</filename> is not writable.
       '';
     };
 

nixos/modules/system/boot/stage-2-init.sh

···
 
 # Optionally log the script output to /dev/kmsg or /run/log/stage-2-init.log.
 # Only at this point are all the necessary prerequisites ready for these commands.
-if test -n "@logCommands@"; then
-    exec {logOutFd}>&1 {logErrFd}>&2
-    if test -w /dev/kmsg; then
-        exec > >(tee -i /proc/self/fd/"$logOutFd" | while read line; do
-            if test -n "$line"; then
-                echo "stage-2-init: $line" > /dev/kmsg
-            fi
-        done) 2>&1
-    else
-        mkdir -p /run/log
-        exec > >(tee -i /run/log/stage-2-init.log) 2>&1
-    fi
+exec {logOutFd}>&1 {logErrFd}>&2
+if test -w /dev/kmsg; then
+    exec > >(tee -i /proc/self/fd/"$logOutFd" | while read line; do
+        if test -n "$line"; then
+            echo "<7>stage-2-init: $line" > /dev/kmsg
+        fi
+    done) 2>&1
+else
+    mkdir -p /run/log
+    exec > >(tee -i /run/log/stage-2-init.log) 2>&1
 fi
 
 
···
 @shell@ @postBootCommands@
 
 
-# Reset the logging file descriptors
-if test -n "@logCommands@"; then
-    exec 1>&$logOutFd 2>&$logErrFd
-    exec {logOutFd}>&- {logErrFd}>&-
-fi 
+# Reset the logging file descriptors.
+exec 1>&$logOutFd 2>&$logErrFd
+exec {logOutFd}>&- {logErrFd}>&-
 
 
 # Start systemd.

nixos/modules/system/boot/stage-2.nix

···
     src = ./stage-2-init.sh;
     shellDebug = "${pkgs.bashInteractive}/bin/bash";
     isExecutable = true;
-    inherit (config.boot) logCommands devShmSize runSize;
+    inherit (config.boot) devShmSize runSize;
     inherit (config.nix) readOnlyStore;
     inherit (config.networking) useHostResolvConf;
     ttyGid = config.ids.gids.tty;
···
   options = {
 
     boot = {
-
-      logCommands = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Whether to replicate command output of stage-1 booting to <filename>/dev/kmsg</filename> or <filename>/run/log/stage-2-init.log</filename> if <filename>/dev/kmsg</filename> is not writable.
-        '';
-      };
 
       postBootCommands = mkOption {
         default = "";