feat: custom command builder

Implemented custom command builder with nicer api suited for my needs.
Also returned error if there are no containers in
`scripts::postgres::get_containers`.

src/lib.rs

@@ -1,6 +1,12 @@
 #![allow(unused)]
 
+use std::{
+    fs::{File, OpenOptions},
+    path::PathBuf,
+};
+
 pub mod cli;
+pub mod command_builder;
 pub mod scripts;
 
 // NOTE: stolen from https://docs.rs/debug_print/latest/debug_print/
@@ -8,3 +14,11 @@ pub mod scripts;
 macro_rules! debug_println {
     ($($arg:tt)*) => (if ::std::cfg!(debug_assertions) { ::std::println!($($arg)*); })
 }
+
+fn safe_create_file(path: PathBuf) -> Result<File, std::io::Error> {
+    OpenOptions::new().write(true).create_new(true).open(path)
+}
+
+fn create_file(path: PathBuf) -> Result<File, std::io::Error> {
+    OpenOptions::new().write(true).create(true).open(path)
+}