feat: redirect `pg_isready` output to /dev/null

Fixed bug where restore commands were called inside pg_isready loop.
Made CommandBuilder::build public. Redirected stdout for pg_isready
calls to /dev/null via Stdio::null().

src/command_builder.rs

@@ -63,7 +63,7 @@ impl CommandBuilder {
         self
     }
 
-    fn build(self) -> Result<Command> {
+    pub fn build(self) -> Result<Command> {
         debug_println!("-----\n{self}\n-----");
 
         let (first, rest) = self.args.split_first().context("empty args")?;

src/scripts/postgres.rs

@@ -8,7 +8,7 @@ use std::{
 };
 
 use super::docker_compose;
-use crate::command_builder::CommandBuilder;
+use crate::{command_builder::CommandBuilder, debug_println};
 
 fn get_containers() -> Result<[String; 2]> {
     // get db container
@@ -55,18 +55,20 @@ pub fn import(file: &Path) -> Result<()> {
     ];
 
     for command in commands {
-        println!("waiting until pg_isready");
+        debug_println!("waiting until pg_isready");
         while !CommandBuilder::docker()
             .args(&format!(
                 "exec {db_container} pg_isready -h postgresdb -p 5432 -U db",
             ))
+            .build()?
+            .stdout(Stdio::null())
             .spawn()?
             .wait()?
             .success()
         {
             thread::sleep(Duration::from_secs(1));
-            CommandBuilder::docker().args(&command).exec()?;
         }
+        CommandBuilder::docker().args(&command).exec()?;
     }
 
     println!("restarting containers");