Add flake.nix and update tests

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -1 +1,2 @@
 coverage
+.direnv

flake.nix

@@ -0,0 +1,36 @@
+{
+  description = "A flake for bash, coreutils, xxd, restic, util-linux, and openssh";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+  }:
+    flake-utils.lib.eachDefaultSystem (
+      system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            bash
+            coreutils
+            kcov
+            vim # provides xxd
+            python3
+            python312Packages.fusepy
+            restic
+            screen
+            shellcheck
+            tmux
+            utillinux
+            openssh
+          ];
+        };
+      }
+    );
+}

test/test.sh

@@ -136,8 +136,6 @@ test-file-changed-as-read-warning () {
   assert-equals-directory "$WORLD_DIR/file3.txt" "$TEST_TMP/restored/$WORLD_DIR/file3.txt"
 }
 
-
-
 test-lock-defaults () {
   TIMESTAMP="$(date +%F_%H-%M-%S --date="2021-01-01")"
   ./backup.sh -t "$TEST_TMP/lockfile" -i "$TEST_TMP/server/world" -o "$TEST_TMP/backups" -s "$SCREEN_TMP" -f "$TIMESTAMP"
@@ -241,7 +239,6 @@ test-restic-defaults () {
   check-latest-backup-restic
 }
 
-
 test-backup-spaces-in-directory () {
   TIMESTAMP="$(date +%F_%H-%M-%S --date="2021-01-01")"
   WORLD_SPACES="$TEST_TMP/minecraft server/the world"
@@ -473,6 +470,7 @@ test-restic-thinning-delete () {
   done
   EXPECTED_TIMESTAMPS=(
     # Weekly
+    "2021-01-01 00:00:00"
 
     # Daily (30)
     "2021-01-01 23:00:00"
@@ -512,11 +510,14 @@ test-restic-thinning-delete () {
     assertContains "$SNAPSHOTS" "$TIMESTAMP" 
   done
   UNEXPECTED_TIMESTAMPS=(
-    "2021-01-01 00:00:00"
+    "2021-01-01 01:00:00"
+    "2021-01-01 02:00:00"
     "2021-01-02 22:00:00"
+    "2021-01-03 22:00:00"
+    "2021-01-04 00:00:00"
   )
   for TIMESTAMP in "${UNEXPECTED_TIMESTAMPS[@]}"; do
-    assertNotContains "$SNAPSHOTS" "$TIMESTAMP" 
+    assertNotContains "$SNAPSHOTS" "$TIMESTAMP"
   done
 }