feat: initial v3 rewrite

lib/impl/sandbox_helper.sh

@@ -0,0 +1,73 @@
+echo -e "\e[32mSetting up...\e[0m"
+
+actualJobScript=$1
+shift
+
+INCLUDE_DIRTY=false
+NO_SANDBOX=false
+KEEP_TMP=false
+KEEP_ENV=""
+# parse flags
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --include-dirty)
+      INCLUDE_DIRTY=true
+      shift
+      ;;
+    --no-sandbox)
+      NO_SANDBOX=true
+      shift
+      ;;
+    --keep-tmp)
+      KEEP_TMP=true
+      shift
+      ;;
+    --keep-env)
+      KEEP_ENV="$2"
+      shift 2
+      ;;
+    *)
+      echo "Unknown option: $1" >&2
+      exit 1
+      ;;
+  esac
+done
+
+if [ "$NO_SANDBOX" = false ]; then
+  echo "Running with simple sandboxing"
+  if [ "$KEEP_TMP" = false ]; then
+    trap "rm -rf '$TMPDIR'" EXIT
+  else
+    echo "Temp dir will be preserved at: $TMPDIR"
+  fi
+
+  # check if dirty
+  DIRTY_PATCH=""
+  if ! git diff --quiet && ! git diff --staged --quiet; then
+    echo "Warning: working tree is dirty."
+    DIRTY_PATCH=$(mktemp -t "nix-gitlab-ci.XXX.patch")
+    git diff --staged > "$DIRTY_PATCH"
+    trap "rm -f '$DIRTY_PATCH'" EXIT
+  fi
+  TMPDIR=$(mktemp -dt "nix-gitlab-ci.XXX")
+  git clone . $TMPDIR
+  pushd $TMPDIR >/dev/null
+  if [[ ! -z "$DIRTY_PATCH" && "$INCLUDE_DIRTY" = true ]]; then
+    echo "Copying dirty changes..."
+    git apply "$DIRTY_PATCH" 2>/dev/null || echo "Failed to copy dirty changes"
+  fi
+
+  echo "Running job in $TMPDIR"
+  env -i $(
+    if [[ -n "$KEEP_ENV" ]]; then
+      IFS=',' read -ra VARS <<< "$KEEP_ENV"
+      for var in "${VARS[@]}"; do
+        printf '%s=%q ' "$var" "${!var}"
+      done
+    fi
+  ) bash $actualJobScript
+  popd >/dev/null
+else
+  exec $actualJobScript
+fi
+