some bash runbook to illustrate mounting errors on nixos-wsl

home-nix/home.nix

@@ -20,7 +20,6 @@
   };
   programs.tmux = {
     enable = true;
-    shell = "zsh";
     extraConfig = builtins.readFile ../tmux/.tmux.conf;
   };
   programs.exa = {
@@ -66,6 +65,7 @@
       a="add"; c="commit"; ca="commit --ammend"; cm="commit -m";
       lol="log --graph --decorate --pretty=oneline --abbrev-commit";
       lola="log --graph --decorate --pretty=oneline --abbrev-commit --all";
+      sts="status";
     };
     extraConfig = {
       merge = {tool="vimdiff"; conflictstyle="diff3";};

system-nix/configuration.nix

@@ -18,7 +18,7 @@ in
     automountPath = "/mnt";
     defaultUser = "nixos"; # if change defaultUser, make sure uid to be 1000 (first user)
     startMenuLaunchers = true;
-
+    automountOptions = "drvfs,metadata,uid=1000,gid=100";
     # Enable native Docker support
     # docker-native.enable = true;
 

system-nix/hardware-configuration.nix

@@ -18,12 +18,12 @@
 
   fileSystems."/usr/lib/wsl/drivers" =
     { device = "drivers";
-      fsType = "9p";
+      fsType = "drvfs";
     };
 
   fileSystems."/usr/lib/wsl/lib" =
     { device = "lib";
-      fsType = "9p";
+      fsType = "drvfs";
     };
 
   fileSystems."/mnt/wsl" =
@@ -32,18 +32,18 @@
     };
 
   fileSystems."/mnt/c" =
-    { device = "C:\134";
-      fsType = "9p";
+    { device = "C:";
+      fsType = "drvfs";
     };
 
   fileSystems."/mnt/d" =
-    { device = "D:\134";
-      fsType = "9p";
+    { device = "D:";
+      fsType = "drvfs";
     };
 
   fileSystems."/mnt/f" =
-    { device = "F:\134";
-      fsType = "9p";
+    { device = "F:";
+      fsType = "drvfs";
     };
 
   swapDevices = [ ];

system-nix/scripts/felia-hwconf.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env sh
+# This is used when we need to refresh hardware-configuration.nix
+# Basically what this does is to mount the drives, then ask nixos-generate-config
+# to regenerate hardware-configuration.nix for us.
+# Manual on nixos-generate-config [here](https://www.mankier.com/8/nixos-generate-config)
+SCRIPT_DIR=$(realpath $(dirname $0))
+${SCRIPT_DIR}/felia-mount.sh
+sudo nixos-generate-config

system-nix/scripts/felia-mount.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env sh
+SCRIPT_DIR=$(realpath $(dirname $0))
+
+function mntDrive() {
+    WSL_DRIVE=$(echo $1 | tr '[:upper:]' '[:lower:]')
+    ${SCRIPT_DIR}/mount-windrive.sh $1 $WSL_DRIVE
+    echo "ls /mnt/${WSL_DRIVE}"
+    ls /mnt/${WSL_DRIVE}
+}
+
+mntDrive C
+mntDrive D
+mntDrive F
+

system-nix/scripts/mount-windrive.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env sh
+
+# https://linuxnightly.com/mount-and-access-hard-drives-in-windows-subsystem-for-linux-wsl/
+# Usage: scripts/mount-windrive.sh C # /mnt/c -> C:\
+
+WIN_DRIVE_CHAR=${1:-"C"}
+WSL_DRIVE_CHAR=${2:-$(echo $WIN_DRIVE_CHAR | tr '[:upper:]' '[:lower:]')}
+
+sudo umount "/mnt/${WSL_DRIVE_CHAR}"
+sudo mount -t drvfs "${WIN_DRIVE_CHAR}:" "/mnt/${WSL_DRIVE_CHAR}"
+