Shorten pg test directories

butane_test_helper/Cargo.toml

@@ -12,10 +12,12 @@ repository = "https://github.com/Electron100/butane"
 documentation = "https://docs.rs/butane/"
 
 [dependencies]
+block-id = "0.2"
 butane_core = { features = ["pg", "sqlite"], workspace = true }
 libc = "0.2"
 once_cell = { workspace = true }
 postgres = { features = ["with-geo-types-0_7"], workspace = true }
+rand = { workspace = true }
 uuid = { features = ["v4"], workspace = true }
 
 [package.metadata.release]

butane_test_helper/src/lib.rs

@@ -7,6 +7,7 @@ use std::sync::Mutex;
 use butane_core::db::{connect, get_backend, pg, sqlite, Backend, Connection, ConnectionSpec};
 use butane_core::migrations::{self, MemMigrations, Migration, Migrations, MigrationsMut};
 use once_cell::sync::Lazy;
+use block_id::{Alphabet, BlockId};
 use uuid::Uuid;
 
 pub fn pg_connection() -> (Connection, PgSetupData) {
@@ -52,12 +53,13 @@ pub struct PgSetupData {
 }
 
 pub fn create_tmp_server() -> PgServerState {
-    eprintln!("create tmp server");
+    let seed: u128 = rand::random::<u64>() as u128;
+    let instance_id = BlockId::new(Alphabet::alphanumeric(), seed, 5).encode_string(0).unwrap();
     // create a temporary directory
     let dir = std::env::current_dir()
         .unwrap()
         .join("tmp_pg")
-        .join(Uuid::new_v4().to_string());
+        .join(instance_id);
     std::fs::create_dir_all(&dir).unwrap();
 
     // Run initdb to create a postgres cluster in our temporary director
@@ -95,6 +97,7 @@ pub fn create_tmp_server() -> PgServerState {
     loop {
         buf.clear();
         stderr.read_line(&mut buf).unwrap();
+        eprintln!("{buf}");
         if buf.contains("ready to accept connections") {
             break;
         }