file/folder exists

Author: rafiki270

Sources/CommandKit/Commands/File+Cmd.swift

@@ -29,6 +29,14 @@ extension Cmd {
         return shell.run(bash: "which \(command)").trimMap()
     }
 
+    /// Check is folder is empty
+    /// - Parameter path: Command
+    public func isEmpty(path: String) -> EventLoopFuture<Bool> {
+        return shell.run(bash: "[ '$(ls -A /path/to/directory)' ] && echo 'not empty' || echo 'empty'").map { output in
+            return output.trimmingCharacters(in: .whitespacesAndNewlines) == "empty"
+        }
+    }
+    
     /// Check is command exists
     /// - Parameter command: Command
     public func exists(command: String) -> EventLoopFuture<Bool> {
@@ -92,8 +100,14 @@ extension Cmd {
 
     /// Check if file exists
     /// - Parameter path: Path to the file
-    public func exists(path: String) ->EventLoopFuture<Bool> {
-        return shell.executor.exists(path: path)
+    public func file(exists path: String) ->EventLoopFuture<Bool> {
+        return shell.executor.file(exists: path)
+    }
+    
+    /// Check if folder exists
+    /// - Parameter path: Path to the folder
+    public func folder(exists path: String) ->EventLoopFuture<Bool> {
+        return shell.executor.folder(exists: path)
     }
 
 }

Sources/CommandKit/Commands/System+Cmd.swift

@@ -0,0 +1,19 @@
+//
+//  File.swift
+//  
+//
+//  Created by Ondrej Rafaj on 15/07/2019.
+//
+
+import Foundation
+import NIO
+
+
+extension Cmd {
+    
+    /// Who Am I (whoami)
+    public func whoami() -> EventLoopFuture<String> {
+        return shell.run(bash: "whoami").trimMap()
+    }
+    
+}

Sources/ShellKit/Executors/Executor.swift

@@ -28,7 +28,11 @@ public protocol Executor {
 
     /// Check if file exists
     /// - Parameter path: Path to the file
-    func exists(path: String) ->EventLoopFuture<Bool>
+    func file(exists path: String) ->EventLoopFuture<Bool>
+    
+    /// Check if folder exists
+    /// - Parameter path: Path to the file
+    func folder(exists path: String) ->EventLoopFuture<Bool>
 
     /// Set current working directory
     /// - Parameter path: Path

Sources/ShellKit/Executors/LocalExecutor.swift

@@ -119,9 +119,18 @@ public class LocalExecutor: Executor {
 
     /// Check if file exists
     /// - Parameter path: Path to the file
-    public func exists(path: String) -> EventLoopFuture<Bool> {
-        let exists = FileManager.default.fileExists(atPath: path)
-        return eventLoop.makeSucceededFuture(exists)
+    public func file(exists path: String) -> EventLoopFuture<Bool> {
+        var dir: ObjCBool = ObjCBool(false)
+        let exists = FileManager.default.fileExists(atPath: path, isDirectory: &dir)
+        return eventLoop.makeSucceededFuture(exists && !dir.boolValue)
+    }
+    
+    /// Check if folder exists
+    /// - Parameter path: Path to the file
+    public func folder(exists path: String) -> EventLoopFuture<Bool> {
+        var dir: ObjCBool = ObjCBool(false)
+        let exists = FileManager.default.fileExists(atPath: path, isDirectory: &dir)
+        return eventLoop.makeSucceededFuture(exists && dir.boolValue)
     }
 
     /// Set current working directory

Sources/ShellKit/Executors/SSHExecutor.swift

@@ -76,17 +76,33 @@ public class SSHExecutor: Executor {
 
     /// Check if file exists
     /// - Parameter path: Path to the file
-    public func exists(path: String) -> EventLoopFuture<Bool> {
+    public func file(exists path: String) -> EventLoopFuture<Bool> {
         let command = """
         FILE=\(path)
         if [ -f "$FILE" ]; then
-            echo "$FILE exists"
+            echo "exists"
         else
-            echo "$FILE does not exist"
+            echo "does not exist"
         fi
         """
         return run(bash: command).map { result in
-            return result.contains("\(path) exists")
+            return result.trimmingCharacters(in: .whitespacesAndNewlines) == "exists"
+        }
+    }
+    
+    /// Check if folder exists
+    /// - Parameter path: Path to the file
+    public func folder(exists path: String) -> EventLoopFuture<Bool> {
+        let command = """
+        DIR=\(path)
+        if [ -d "$DIR" ]; then
+            echo "exists"
+        else
+            echo "does not exist"
+        fi
+        """
+        return run(bash: command).map { result in
+            return result.trimmingCharacters(in: .whitespacesAndNewlines) == "exists"
         }
     }
 

Sources/ShellKit/Shell.swift

@@ -133,8 +133,14 @@ public class Shell: Executor {
 
     /// Check if file exists
     /// - Parameter path: Path to the file
-    public func exists(path: String) ->EventLoopFuture<Bool> {
-        return executor.exists(path: path)
+    public func file(exists path: String) ->EventLoopFuture<Bool> {
+        return executor.file(exists: path)
+    }
+    
+    /// Check if folder exists
+    /// - Parameter path: Path to the file
+    public func folder(exists path: String) -> EventLoopFuture<Bool> {
+        return executor.folder(exists: path)
     }
 
     /// Set current working directory