Add pure flag to upload command

src/main.rs

@@ -75,7 +75,7 @@ enum Command {
     #[arg(short = 'a', long, default_value = "delete", default_missing_value = "archive", num_args = 0..=1)]
     old_version_policy: OldVersionPolicy,
     /// The directory where to upload to, relative to the server directory
-    #[arg(short = 'p', long, default_value = "plugins")]
+    #[arg(short = 'd', long, default_value = "plugins")]
     upload_directory: PathBuf,
     /// Skip the confirmation dialog
     #[arg(long, default_value = "false")]
@@ -83,6 +83,9 @@ enum Command {
     /// The prefix of the name of older versions of the file, which should be replaced or deleted
     #[arg(short, long)]
     file_name: Option<String>,
+    /// Only upload files which are not present yet on the target server
+    #[arg(short, long, default_value = "false")]
+    pure: bool,
   },
   /// Execute a command on the servers
   #[command(visible_short_flag_alias = 'c')]
@@ -186,6 +189,7 @@ fn main() -> Result<(), String> {
       mut upload_directory,
       no_confirm,
       file_name,
+      pure,
     } => {
       require_non_empty_servers(&servers)?;
       require_non_empty(&files, "files to upload")?;
@@ -304,13 +308,20 @@ fn main() -> Result<(), String> {
                   let add_action = FileAction::new(file, Action::Add).expect("path points to file");
 
                   let mut ls_lines = ls_output.lines();
+
+                  if pure && ls_lines.clone().any(|file| file == file_name) {
+                    log!(logger, debug, "file is already present: {}", file_name);
+                    return vec![]; //ignore that file, since it is already present
+                  }
+
                   match old_version_policy {
                     OldVersionPolicy::Ignore => {
-                      vec![if ls_lines.any(|file| file == file_name) {
-                        FileAction::new(&file_name, Action::Replace).expect("path points to file")
+                      if !ls_lines.any(|file| file == file_name) {
+                        vec![add_action] //file doesn't exist yet
                       } else {
-                        add_action
-                      }]
+                        vec![FileAction::new(&file_name, Action::Replace)
+                          .expect("path points to file")]
+                      }
                     }
                     OldVersionPolicy::Archive => ls_lines
                       .filter(|file| file_matcher.matches(file))
@@ -347,7 +358,15 @@ fn main() -> Result<(), String> {
             working_directory,
           })
         })
-        .collect::<Result<Vec<_>, String>>()?;
+        .collect::<Result<Vec<_>, String>>()?
+        .into_iter()
+        .filter(|server_actions| !server_actions.actions.is_empty())
+        .collect::<Vec<_>>();
+      
+      if actions.is_empty() { 
+        log!(logger, "Nothing to be done, everything is up to date");
+        return Ok(())
+      }
 
       log!(logger, "The following actions will be performed: ");
       for server_actions in &actions {