Add linux support for vscode dev-setup

The ${env:XDG_DATA_HOME} variable is not used, as this variable resolves
to the current working directory within Visual Studio Code's development
container. By manually specifying the file path, it is possible to use
Visual Studio Code's development container.

The "mkdir" command uses the "-p" flag. This flag creates the parent
directories, as well. Should they already exists, the command moves
down to the next folder to create without throwing an error.

The "-r" parameter of the "cp" is required to recursively copy all
files and directories within the "publish" directory.

.vscode/settings.json

@@ -9,7 +9,11 @@
     // This is where jellyfin stores its configs, plugins, metadata etc
     // This is platform specific by default, but on Windows defaults to
     // ${env:LOCALAPPDATA}/jellyfin
-    "jellyfinDataDir" : "${env:LOCALAPPDATA}/jellyfin",
+    // and on Linux, it defaults to
+    // ${env:XDG_DATA_HOME}/jellyfin
+    // However ${env:XDG_DATA_HOME} does not work in Visual Studio Code's development container!
+    "jellyfinWindowsDataDir": "${env:LOCALAPPDATA}/jellyfin",
+    "jellyfinLinuxDataDir": "$HOME/.local/share/jellyfin",
     // The name of the plugin
     "pluginName": "Jellyfin.Plugin.Template",
 }

.vscode/tasks.json

@@ -7,7 +7,11 @@
       // jellyfin server's plugin directory
       "label": "build-and-copy",
       "dependsOrder": "sequence",
-      "dependsOn": ["build", "make-plugin-dir", "copy-dll"]
+      "dependsOn": [
+        "build",
+        "make-plugin-dir",
+        "copy-dll"
+      ]
     },
     {
       // Build the plugin
@@ -31,12 +35,20 @@
       "label": "make-plugin-dir",
       "type": "shell",
       "command": "mkdir",
+      "windows": {
         "args": [
           "-Force",
           "-Path",
-           "${config:jellyfinDataDir}/plugins/${config:pluginName}/"
+          "${config:jellyfinWindowsDataDir}/plugins/${config:pluginName}/"
         ]
       },
+      "linux": {
+        "args": [
+          "-p",
+          "${config:jellyfinLinuxDataDir}/plugins/${config:pluginName}/"
+        ]
+      }
+    },
     {
       // Copy the plugin dll to the jellyfin plugin install path
       // This command copies every .dll from the build directory to the plugin dir
@@ -45,11 +57,19 @@
       "label": "copy-dll",
       "type": "shell",
       "command": "cp",
+      "windows": {
         "args": [
           "./${config:pluginName}/bin/Debug/net6.0/publish/*",
-           "${config:jellyfinDataDir}/plugins/${config:pluginName}/"
+          "${config:jellyfinWindowsDataDir}/plugins/${config:pluginName}/"
         ]
-
+      },
+      "linux": {
+        "args": [
+          "-r",
+          "./${config:pluginName}/bin/Debug/net6.0/publish/*",
+          "${config:jellyfinLinuxDataDir}/plugins/${config:pluginName}/"
+        ]
+      }
     },
   ]
 }