Add CLI options to display app and user data directories

For Windows, it was necessary to add a batch file "mdview-cli.cmd",
because Electron behaves weirdly on a Windows command line. The Electron
process detaches from the calling command line and outputs overwrite
other outputs, e.g. the CLI prompt itself.

app/lib/main/cli.js

@@ -64,3 +64,7 @@ exports.parse = args => {
 }
 
 exports.isDevelopment = isDevelopment
+
+exports.shallOutputAppPath = args => args.includes("--app-path")
+
+exports.shallOutputDataPath = args => args.includes("--data-path")

app/main.js

@@ -588,13 +588,15 @@ navigation.register(UPDATE_FILE_TIME_NAV_ID, lastModificationTime => {
 // Initialization before Electron's
 
 const args = process.argv
+const appDir = path.dirname(path.resolve(args[0]))
+
+// Set user data directory
 if (cli.isDevelopment()) {
     electron.app.setPath(
         "userData",
         path.join(path.resolve(args.slice(1).find(arg => !arg.startsWith("-"))), ".data"),
     )
 } else if (process.platform === "win32") {
-    const appDir = path.dirname(path.resolve(args[0]))
     const dataPath = fs.readFileSync(path.join(appDir, DATA_DIR_FILE), { encoding: "utf-8" }).trim()
     if (dataPath !== USER_DATA_PLACEHOLDER) {
         electron.app.setPath(
@@ -603,3 +605,17 @@ if (cli.isDevelopment()) {
         )
     }
 }
+
+// If set, ouput only paths and exit
+let shallExitApplication = false
+if (cli.shallOutputAppPath(args)) {
+    console.log(appDir)
+    shallExitApplication = true
+}
+if (cli.shallOutputDataPath(args)) {
+    console.log(electron.app.getPath("userData"))
+    shallExitApplication = true
+}
+if (shallExitApplication) {
+    process.exit(0)
+}

build/assets/mdview-cli.cmd

@@ -0,0 +1 @@
+@"%~dp0mdview.exe" %*

build/deployConfig.js

@@ -55,8 +55,9 @@ module.exports = {
         icon: WIN_ICON,
         extraFiles: [
             {
-                from: "build/.datadir",
-                to: ".datadir",
+                from: "build/assets",
+                to: ".",
+                filter: ["**/*"],
             },
         ],
     },