[feat] Print warning for addition of more than 50 projects

(rebased by @mriehl for commit signing)

src/app/mod.rs

@@ -234,7 +234,16 @@ For further information please have a look at our README https://github.com/broc
         .arg(Arg::with_name("PROJECT_NAME").value_name("PROJECT_NAME").index(1).required(true)),
     )
     .subcommand(SubCommand::with_name("projectile").about("Write projectile bookmarks"))
-    .subcommand(SubCommand::with_name("intellij").about("Add projects to intellijs list of recent projects"))
+    .subcommand(
+      SubCommand::with_name("intellij")
+        .about("Add projects to intellijs list of recent projects")
+        .arg(
+          Arg::with_name("no-warn")
+            .long("no-warn")
+            .short("-n")
+            .help("Disables warning message if more than 50 projects would be added"),
+        ),
+    )
     .subcommand(
       SubCommand::with_name("ls").about("List projects").arg(
         Arg::with_name("tag")

src/intellij/mod.rs

@@ -6,7 +6,7 @@ use std::io::Write;
 use std::option::Option::Some;
 use std::path::PathBuf;
 
-pub fn intellij(maybe_config: Result<Config, AppError>, logger: &Logger) -> Result<(), AppError> {
+pub fn intellij(maybe_config: Result<Config, AppError>, logger: &Logger, warn: bool) -> Result<(), AppError> {
   let config: Config = maybe_config?;
   let projects_paths: Vec<PathBuf> = config.projects.iter().map(|(_, p)| config.actual_path_to_project(p, logger)).collect();
   let recent_projects_candidates = get_recent_projects_candidates()?;
@@ -26,6 +26,13 @@ pub fn intellij(maybe_config: Result<Config, AppError>, logger: &Logger) -> Resu
     }
     writeln!(writer, "</map></option></component></application>")?;
   }
+
+  let number_of_projects = projects_paths.len();
+
+  if number_of_projects > 50 && warn {
+    print_number_of_projects_warning(number_of_projects)
+  }
+
   Ok(())
 }
 
@@ -49,3 +56,10 @@ fn get_recent_projects_candidates() -> Result<Vec<PathBuf>, AppError> {
   }
   Ok(recent_projects_candidates)
 }
+
+fn print_number_of_projects_warning(number_of_projects: usize) {
+  print!("WARNING: {} ", number_of_projects);
+  print!("projects were added to the list. Intellij only lists 50 projects by default. You can change this in Intellij by going to ");
+  print!(r#""Help -> Find Action -> Registry -> ide.max.recent.projects" "#);
+  println!("and adjusting the number accordingly. A high number is recommended since it won't do any harm to the system.");
+}

src/main.rs

@@ -119,7 +119,7 @@ fn _main() -> i32 {
       &subcommand_logger,
     ),
     "projectile" => projectile::projectile(config, &subcommand_logger),
-    "intellij" => intellij::intellij(config, &subcommand_logger),
+    "intellij" => intellij::intellij(config, &subcommand_logger, !subcommand_matches.is_present("no-warn")),
     "print-path" => project::print_path(
       config,
       subcommand_matches.value_of("PROJECT_NAME").expect("argument required by clap.rs"),