feat: add remote command execution support (#36)

Allow executing commands on remote hosts via 'sshm <host> <command>'.
Add -t/--tty flag for forcing TTY allocation on interactive commands.

Co-authored-by: Guillaume Archambault <67098259+Gu1llaum-3@users.noreply.github.com>

README.md

@@ -229,6 +229,15 @@ sshm
 # Connect directly to a specific host (with history tracking)
 sshm my-server
 
+# Execute a command on a remote host
+sshm my-server uptime
+
+# Execute command with arguments
+sshm my-server ls -la /var/log
+
+# Force TTY allocation for interactive commands
+sshm -t my-server sudo systemctl restart nginx
+
 # Launch TUI with custom SSH config file
 sshm -c /path/to/custom/ssh_config
 
@@ -286,6 +295,33 @@ sshm web-01
 - **Error handling** - Clear messages if host doesn't exist or configuration issues
 - **Config file support** - Works with custom config files using `-c` flag
 
+### Remote Command Execution
+
+Execute commands on remote hosts without opening an interactive shell:
+
+```bash
+# Execute a single command
+sshm prod-server uptime
+
+# Execute command with arguments
+sshm prod-server ls -la /var/log
+
+# Check disk usage
+sshm prod-server df -h
+
+# View logs (pipe to local commands)
+sshm prod-server 'cat /var/log/nginx/access.log' | grep 404
+
+# Force TTY allocation for interactive commands (sudo, vim, etc.)
+sshm -t prod-server sudo systemctl restart nginx
+```
+
+**Features:**
+- **Exit code propagation** - Remote command exit codes are passed through
+- **TTY support** - Use `-t` flag for commands requiring terminal interaction
+- **Pipe-friendly** - Output can be piped to local commands for processing
+- **History tracking** - Command executions are recorded in connection history
+
 ### Backup Configuration
 
 SSHM automatically creates backups of your SSH configuration files before making any changes to ensure your configurations are safe.

cmd/root.go

@@ -24,36 +24,49 @@ var AppVersion = "dev"
 // configFile holds the path to the SSH config file
 var configFile string
 
+// forceTTY forces pseudo-TTY allocation for remote commands
+var forceTTY bool
+
 // searchMode enables the focus on search mode at startup
 var searchMode bool
 
 // RootCmd is the base command when called without any subcommands
 var RootCmd = &cobra.Command{
-	Use:   "sshm [host]",
+	Use:   "sshm [host] [command...]",
 	Short: "SSH Manager - A modern SSH connection manager",
 	Long: `SSHM is a modern SSH manager for your terminal.
 
 Main usage:
   Running 'sshm' (without arguments) opens the interactive TUI window to browse, search, and connect to your SSH hosts graphically.
   Running 'sshm <host>' connects directly to the specified host and records the connection in your history.
+  Running 'sshm <host> <command>' executes the command on the remote host and returns the output.
 
 You can also use sshm in CLI mode for other operations like adding, editing, or searching hosts.
 
-Hosts are read from your ~/.ssh/config file by default.`,
+Hosts are read from your ~/.ssh/config file by default.
+
+Examples:
+  sshm                           # Open interactive TUI
+  sshm prod-server               # Connect to host interactively
+  sshm prod-server uptime        # Execute 'uptime' on remote host
+  sshm prod-server ls -la /var   # Execute command with arguments
+  sshm -t prod-server sudo reboot # Force TTY for interactive commands`,
 	Version:       AppVersion,
 	Args:          cobra.ArbitraryArgs,
 	SilenceUsage:  true,
-	SilenceErrors: true, // We'll handle errors ourselves
+	SilenceErrors: true,
 	RunE: func(cmd *cobra.Command, args []string) error {
-		// If no arguments provided, run interactive mode
 		if len(args) == 0 {
 			runInteractiveMode()
 			return nil
 		}
 
-		// If a host name is provided, connect directly
 		hostName := args[0]
-		connectToHost(hostName)
+		var remoteCommand []string
+		if len(args) > 1 {
+			remoteCommand = args[1:]
+		}
+		connectToHost(hostName, remoteCommand)
 		return nil
 	},
 }
@@ -105,8 +118,7 @@ func runInteractiveMode() {
 	}
 }
 
-func connectToHost(hostName string) {
-	// Quick check if host exists without full parsing (optimized for connection)
+func connectToHost(hostName string, remoteCommand []string) {
 	var hostFound bool
 	var err error
 
@@ -126,45 +138,42 @@ func connectToHost(hostName string) {
 		os.Exit(1)
 	}
 
-	// Record the connection in history
 	historyManager, err := history.NewHistoryManager()
 	if err != nil {
-		// Log the error but don't prevent the connection
 		fmt.Printf("Warning: Could not initialize connection history: %v\n", err)
 	} else {
 		err = historyManager.RecordConnection(hostName)
 		if err != nil {
-			// Log the error but don't prevent the connection
 			fmt.Printf("Warning: Could not record connection history: %v\n", err)
 		}
 	}
 
-	// Build and execute the SSH command
-	fmt.Printf("Connecting to %s...\n", hostName)
-
-	var sshCmd *exec.Cmd
 	var args []string
 
 	if configFile != "" {
 		args = append(args, "-F", configFile)
 	}
+
+	if forceTTY {
+		args = append(args, "-t")
+	}
+
 	args = append(args, hostName)
 
-	// Note: We don't add RemoteCommand here because if it's configured in SSH config,
-	// SSH will handle it automatically. Adding it as a command line argument would conflict.
+	if len(remoteCommand) > 0 {
+		args = append(args, remoteCommand...)
+	} else {
+		fmt.Printf("Connecting to %s...\n", hostName)
+	}
 
-	sshCmd = exec.Command("ssh", args...)
-
-	// Set up the command to use the same stdin, stdout, and stderr as the parent process
+	sshCmd := exec.Command("ssh", args...)
 	sshCmd.Stdin = os.Stdin
 	sshCmd.Stdout = os.Stdout
 	sshCmd.Stderr = os.Stderr
 
-	// Execute the SSH command
 	err = sshCmd.Run()
 	if err != nil {
 		if exitError, ok := err.(*exec.ExitError); ok {
-			// SSH command failed, exit with the same code
 			if status, ok := exitError.Sys().(syscall.WaitStatus); ok {
 				os.Exit(status.ExitStatus())
 			}
@@ -200,17 +209,13 @@ func getVersionWithUpdateCheck() string {
 
 // Execute adds all child commands to the root command and sets flags appropriately.
 func Execute() {
-	// Custom error handling for unknown commands that might be host names
 	if err := RootCmd.Execute(); err != nil {
-		// Check if this is an "unknown command" error and the argument might be a host name
 		errStr := err.Error()
 		if strings.Contains(errStr, "unknown command") {
-			// Extract the command name from the error
 			parts := strings.Split(errStr, "\"")
 			if len(parts) >= 2 {
 				potentialHost := parts[1]
-				// Try to connect to this as a host
-				connectToHost(potentialHost)
+				connectToHost(potentialHost, nil)
 				return
 			}
 		}
@@ -220,8 +225,8 @@ func Execute() {
 }
 
 func init() {
-	// Add the config file flag
 	RootCmd.PersistentFlags().StringVarP(&configFile, "config", "c", "", "SSH config file to use (default: ~/.ssh/config)")
+	RootCmd.Flags().BoolVarP(&forceTTY, "tty", "t", false, "Force pseudo-TTY allocation (useful for interactive remote commands)")
 	RootCmd.PersistentFlags().BoolVarP(&searchMode, "search", "s", false, "Focus on search input at startup")
 
 	// Set custom version template with update check

cmd/root_test.go

@@ -7,9 +7,8 @@ import (
 )
 
 func TestRootCommand(t *testing.T) {
-	// Test that the root command is properly configured
-	if RootCmd.Use != "sshm [host]" {
-		t.Errorf("Expected Use 'sshm [host]', got '%s'", RootCmd.Use)
+	if RootCmd.Use != "sshm [host] [command...]" {
+		t.Errorf("Expected Use 'sshm [host] [command...]', got '%s'", RootCmd.Use)
 	}
 
 	if RootCmd.Short != "SSH Manager - A modern SSH connection manager" {
@@ -22,10 +21,8 @@ func TestRootCommand(t *testing.T) {
 }
 
 func TestRootCommandFlags(t *testing.T) {
-	// Test that persistent flags are properly configured
 	flags := RootCmd.PersistentFlags()
 
-	// Check config flag
 	configFlag := flags.Lookup("config")
 	if configFlag == nil {
 		t.Error("Expected --config flag to be defined")
@@ -34,6 +31,15 @@ func TestRootCommandFlags(t *testing.T) {
 	if configFlag.Shorthand != "c" {
 		t.Errorf("Expected config flag shorthand 'c', got '%s'", configFlag.Shorthand)
 	}
+
+	ttyFlag := RootCmd.Flags().Lookup("tty")
+	if ttyFlag == nil {
+		t.Error("Expected --tty flag to be defined")
+		return
+	}
+	if ttyFlag.Shorthand != "t" {
+		t.Errorf("Expected tty flag shorthand 't', got '%s'", ttyFlag.Shorthand)
+	}
 }
 
 func TestRootCommandSubcommands(t *testing.T) {
@@ -103,13 +109,17 @@ func TestExecuteFunction(t *testing.T) {
 }
 
 func TestConnectToHostFunction(t *testing.T) {
-	// Test that connectToHost function exists and can be called
-	// Note: We can't easily test the actual connection without a valid SSH config
-	// and without actually connecting to a host, but we can verify the function exists
 	t.Log("connectToHost function exists and is accessible")
+}
 
-	// The function will handle errors internally (like host not found)
-	// We don't want to actually test the SSH connection in unit tests
+func TestRemoteCommandUsage(t *testing.T) {
+	if !strings.Contains(RootCmd.Long, "command") {
+		t.Error("Long description should mention remote command execution")
+	}
+
+	if !strings.Contains(RootCmd.Long, "uptime") {
+		t.Error("Long description should include command examples")
+	}
 }
 
 func TestRunInteractiveModeFunction(t *testing.T) {