initial commit

LICENSE

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+Copyright 2020 Matthijs Steen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Visual Studio Code Server support in NixOS
+
+Experimental support for VS Code Server in NixOS. The NodeJS by default supplied by VS Code cannot be used within NixOS due to missing hardcoded paths, so it is automatically replaced by a symlink to a compatible version of NodeJS that does work under NixOS.
+
+## Installation
+
+```nix
+{
+  imports = [
+    (fetchTarball "https://github.com/msteen/nixos-vscode-server/tarball/master")
+  ];
+
+  services.vscode-server.enable = true;
+}
+```
+
+### Home Manager
+
+```nix
+{
+  imports = [
+    "${fetchTarball "https://github.com/msteen/nixos-vscode-server/tarball/master"}/modules/vscode-server/home.nix"
+  ];
+
+  services.vscode-server.enable = true;
+}
+```
+
+## Usage
+
+If `services.vscode-server.enable` was already set to `true` when trying to connect it should simply work, there is nothing for you to do.

default.nix

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+import ./modules/vscode-server

modules/vscode-server/default.nix

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+import ./module.nix ({ name, description, serviceConfig }:
+
+{
+  systemd.user.services.${name} = {
+    inherit description serviceConfig;
+    wantedBy = [ "default.target" ];
+  };
+})

modules/vscode-server/home.nix

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+import ./module.nix ({ name, description, serviceConfig }:
+
+{
+  systemd.user.services.${name} = {
+    Unit = {
+      Description = description;
+    };
+
+    Service = serviceConfig;
+
+    Install = {
+      WantedBy = [ "default.target" ];
+    };
+  };
+})

modules/vscode-server/module.nix

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+moduleConfig:
+{ lib, pkgs, ... }:
+
+with lib;
+
+{
+  options.services.vscode-server.enable = with types; mkEnableOption "VS Code Server";
+
+  config = moduleConfig rec {
+    name = "auto-fix-vscode-server";
+    description = "Automatically fix the VS Code server used by the remote SSH extension";
+    serviceConfig = {
+      # When a monitored directory is deleted, it will stop being monitored.
+      # Even if it is later recreated it will not restart monitoring it.
+      # Unfortunately the monitor does not kill itself when it stops monitoring,
+      # so rather than creating our own restart mechanism, we leverage systemd to do this for us.
+      Restart = "always";
+      RestartSec = 0;
+      ExecStart = pkgs.writeShellScript "${name}.sh" ''
+        set -euo pipefail
+        PATH=${makeBinPath (with pkgs; [ coreutils inotify-tools ])}
+        bin_dir=~/.vscode-server/bin
+        [[ -e $bin_dir ]] &&
+        find "$bin_dir" -mindepth 2 -maxdepth 2 -name node -type f -exec ln -sfT ${pkgs.nodejs-12_x}/bin/node {} \; ||
+        mkdir -p "$bin_dir"
+        while IFS=: read -r bin_dir event; do
+          # A new version of the VS Code Server is being created.
+          if [[ $event == 'CREATE,ISDIR' ]]; then
+            # Create a trigger to know when their node is being created and replace it for our symlink.
+            touch "$bin_dir/node"
+            inotifywait -qq -e DELETE_SELF "$bin_dir/node"
+            ln -sfT ${pkgs.nodejs-12_x}/bin/node "$bin_dir/node"
+          # The monitored directory is deleted, e.g. when "Uninstall VS Code Server from Host" has been run.
+          elif [[ $event == DELETE_SELF ]]; then
+            # See the comments above Restart in the service config.
+            exit 0
+          fi
+        done < <(inotifywait -q -m -e CREATE,ISDIR -e DELETE_SELF --format '%w%f:%e' "$bin_dir")
+      '';
+    };
+  };
+}