suppress mail errors

.github/workflows/diff-pr.yml

@@ -17,18 +17,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
 
-      - name: merge base branch
-        run: |
-          git config user.email "ci@localhost"
-          git config user.name "CI"
-          git fetch origin ${{ github.event.pull_request.base.ref }}
-          git merge --no-edit origin/${{ github.event.pull_request.base.ref }}
-
       - name: worktree base for diff
-        run: git worktree add "$RUNNER_TEMP/base" "origin/${{ github.event.pull_request.base.ref }}"
+        run: git worktree add "$RUNNER_TEMP/base" "${{ github.event.pull_request.base.sha }}"
 
       - name: build closures and render diff
         run: |

.github/workflows/flake-update.yml

@@ -5,19 +5,21 @@ on:
     - cron: "17 4 * * *"
   workflow_dispatch:
 
+permissions:
+  contents: write
+  pull-requests: write
+
 jobs:
   update:
     runs-on: nix
     steps:
       - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
 
       - run: nix flake update -L
 
       - name: open/update PR
         env:
-          GH_TOKEN: ${{ secrets.BOT_TOKEN }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           API: ${{ github.api_url }}
           REPO: ${{ github.repository }}
         run: |

ci.py

@@ -8,7 +8,6 @@ import re
 import subprocess
 import subprocess_tee
 import sys
-import urllib.error
 import urllib.request
 from collections import Counter
 from pathlib import Path
@@ -27,10 +26,6 @@ def git(*args, check=True):
     return run("git", *args, check=check, capture_output=True)
 
 
-class GiteaError(Exception):
-    pass
-
-
 def gitea(method, path, body=None):
     url = f'{os.environ["API"]}/repos/{os.environ["REPO"]}{path}'
     data = json.dumps(body).encode() if body is not None else None
@@ -42,11 +37,7 @@ def gitea(method, path, body=None):
         with urllib.request.urlopen(req) as resp:
             raw = resp.read()
     except urllib.error.HTTPError as e:
-        try:
+        sys.exit(f"gitea {method} {path}: {e.code} {e.reason}\n{e.read().decode()}")
-            detail = json.loads(e.read()).get("message", e.reason)
-        except (json.JSONDecodeError, UnicodeDecodeError):
-            detail = e.reason
-        raise GiteaError(f"{method} {path}: {e.code} {detail}") from None
     return json.loads(raw) if raw else None
 
 
@@ -475,24 +466,16 @@ def open_pr(args):
 
     host = os.environ["API"].removesuffix("/api/v1")
     auth = base64.b64encode(f'token:{os.environ["GH_TOKEN"]}'.encode()).decode()
-    push = git("-c", f"http.extraHeader=Authorization: Basic {auth}",
+    git("-c", f"http.extraHeader=Authorization: Basic {auth}",
-               "push", "-f", f'{host}/{os.environ["REPO"]}.git', f"HEAD:{args.branch}",
+        "push", "-f", f'{host}/{os.environ["REPO"]}.git', f"HEAD:{args.branch}")
-               check=False)
-    if push.returncode != 0:
-        raise RuntimeError(f"git push failed:\n{push.stderr}")
 
-    pulls = gitea("GET", f"/pulls?state=open&base_branch={args.base}")
+    owner = os.environ["REPO"].split("/")[0]
-    existing = next((pr for pr in pulls if pr["head"]["ref"] == args.branch), None)
+    if gitea("GET", f"/pulls?state=open&head={owner}:{args.branch}"):
-    if existing:
-        print(f"PR #{existing['number']} already open, pushed update")
         return
     labels = [label_id(args.label)] if args.label else []
-    pr = gitea("POST", "/pulls",
+    gitea("POST", "/pulls",
           {"title": args.title, "head": args.branch, "base": args.base,
            "body": Path(args.body_file).read_text(), "labels": labels})
-    if not pr or "number" not in pr:
-        raise GiteaError(f"POST /pulls: unexpected response: {json.dumps(pr)}")
-    print(f"opened PR #{pr['number']}")
 
 
 def main():

configuration.nix

@@ -5,7 +5,6 @@
   hostInfo,
   customPkgs,
   flakeRev,
-  deployLabel,
   ...
 }:
 let
@@ -20,10 +19,9 @@ in
     giteaRepo = "server/server-config";
     tokenFile = "${hostInfo.paths.secrets}/gitea-autodeploy-token";
     allowedSigners = [
-      "flowey@arch namespaces=\"git\" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPaGpTX3EzfezVc2nl3MgsKVamYYP2h2VJaRny8pZkvi"
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPaGpTX3EzfezVc2nl3MgsKVamYYP2h2VJaRny8pZkvi flowey@arch"
     ];
     stateDir = hostInfo.paths.config;
-    repoOwner = "server";
   };
 
   assertions =
@@ -63,7 +61,14 @@ in
 
   time.timeZone = "UTC";
   system.stateVersion = "26.05";
-  system.nixos.label = if deployLabel != null then deployLabel else flakeRev;
+  system.nixos.label =
+    let
+      labelFile = ./.nixos-label;
+    in
+    if builtins.pathExists labelFile then
+      lib.removeSuffix "\n" (builtins.readFile labelFile)
+    else
+      flakeRev;
 
   nix = {
     settings = {

dsl.nix

@@ -222,15 +222,13 @@ rec {
     : Bind mounts, keyed by mount point.
 
     `resources.devices`
-    : Host device nodes to expose, as paths. Bound into the container at the
+    : Host device nodes to expose, as paths, added to the unit's
-      same path and added to the unit's `DeviceAllow=` - the cgroup
+      `DeviceAllow=`. nspawn populates a handful of privileged devices
-      permission alone doesn't get you a working node (nothing can `mknod` a
+      (`/dev/kvm`, `/dev/net/tun`, ...) into the container's own `/dev` once
-      device inside a user namespace), and the bind alone leaves the cgroup
+      the cgroup allows it, and silently skips ones the host doesn't have -
-      denying `open()`, so both are needed. The bind is unconditional, so
+      no `resources.fs` bind mount needed. Nodes keep their host ownership,
-      the device must actually exist on whatever host runs the container.
+      so a consumer inside needs `isolation.privateUsers = "identity"` for
-      Nodes keep their host ownership, so a consumer inside needs
+      the owning gid to mean anything.
-      `isolation.privateUsers = "identity"` for the owning gid to mean
-      anything.
 
     `isolation.nixDaemon`
     : Whether the Nix daemon and CLI are available inside the container.
@@ -297,10 +295,6 @@ rec {
         + lib.optionalString useIdmap ":idmap"
       ) allBindMounts;
       bindMountHostPaths = map (bm: bm.hostPath) (lib.attrValues allBindMounts);
-      # DeviceAllow= alone only grants cgroup permission - nspawn can't
-      # mknod a device node inside a user namespace, so the node still
-      # needs an explicit bind from the host.
-      deviceFlags = map (d: "--bind=${d}") devices;
       inherit (deriveIdentity ifPrefix.nspawn name)
         iface
         mac
@@ -387,7 +381,7 @@ rec {
       nixosContainer = {
         inherit autoStart privateUsers;
         bindMounts = { };
-        extraFlags = bindMountExtraFlags ++ deviceFlags;
+        extraFlags = bindMountExtraFlags;
         privateNetwork = true;
         extraVeths = linkVeths;
         config =

flake.lock

@@ -1,17 +1,5 @@
 {
   "nodes": {
-    "deploy-label": {
-      "flake": false,
-      "locked": {
-        "path": "./misc/deploy-label",
-        "type": "path"
-      },
-      "original": {
-        "path": "./misc/deploy-label",
-        "type": "path"
-      },
-      "parent": []
-    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -38,11 +26,11 @@
         "spectrum": "spectrum"
       },
       "locked": {
-        "lastModified": 1789506833,
+        "lastModified": 1786300091,
-        "narHash": "sha256-4L8SOCF84de1irB72Ka9VHcu9wrAJ9Amuey4lU9oh4Y=",
+        "narHash": "sha256-4UFJOVGpaYtHW5yasSv80MaJxTBYdk2zyf3jhKtt0wA=",
         "owner": "microvm-nix",
         "repo": "microvm.nix",
-        "rev": "187b0a390ee054028106a674e7b01b1cb940cbba",
+        "rev": "71beea0076cd46dafcee97a5a2e7d00cbba5bd2f",
         "type": "github"
       },
       "original": {
@@ -75,11 +63,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1789785513,
+        "lastModified": 1786384358,
-        "narHash": "sha256-B44WL6h0XoLjJ41bUPJk0X5SDinLCII//6EcBLXKiJ0=",
+        "narHash": "sha256-RzPPiWeUtuvymnpuEWsdtzli5w4kjZs49FqEs3/1u+I=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "20b1ddd1aa5ace70c9468305030aa4f9ef79671b",
+        "rev": "2fcb964de67fcf60b43471c55d5d99e61a9ccb5a",
         "type": "github"
       },
       "original": {
@@ -91,7 +79,6 @@
     },
     "root": {
       "inputs": {
-        "deploy-label": "deploy-label",
         "microvm": "microvm",
         "mtce": "mtce",
         "nixpkgs": "nixpkgs"
@@ -100,11 +87,11 @@
     "spectrum": {
       "flake": false,
       "locked": {
-        "lastModified": 1786032750,
+        "lastModified": 1785761586,
-        "narHash": "sha256-+Ba/kIn5BjvV7PN8bWOo7RoqgTY/Yv2M7qeMf3wS2Ag=",
+        "narHash": "sha256-MWOMVqJJERwjQGgRIv8d6rlEBqbLM3VZWxHkNKIIZNw=",
         "ref": "refs/heads/main",
-        "rev": "77d2389874bb092b8dbf05ecc5b1030372e80e98",
+        "rev": "a7762d6f54b40560dd5255ce902e6e6a5d980fe9",
-        "revCount": 1417,
+        "revCount": 1416,
         "type": "git",
         "url": "https://spectrum-os.org/git/spectrum"
       },

flake.nix

@@ -7,8 +7,6 @@
     mtce.inputs.nixpkgs.follows = "nixpkgs";
     microvm.url = "github:microvm-nix/microvm.nix";
     microvm.inputs.nixpkgs.follows = "nixpkgs";
-    deploy-label.url = "path:./misc/deploy-label";
-    deploy-label.flake = false;
   };
 
   outputs =
@@ -17,7 +15,6 @@
       nixpkgs,
       mtce,
       microvm,
-      deploy-label,
       ...
     }:
     let
@@ -26,12 +23,6 @@
       pkgs = import nixpkgs { inherit system; };
 
       flakeRev = self.shortRev or self.dirtyShortRev or "unknown";
-      deployLabel =
-        let
-          labelFile = "${deploy-label}/label";
-          raw = lib.removeSuffix "\n" (builtins.readFile labelFile);
-        in
-        if raw != "" then raw else null;
 
       customPkgs = {
         hopper-rs = pkgs.callPackage ./packages/hopper-rs.nix { };
@@ -65,7 +56,7 @@
 
       specialArgsFor = hostName: {
         hostInfo = hostInfoFor hostName;
-        inherit inputs customPkgs flakeRev deployLabel;
+        inherit inputs customPkgs flakeRev;
       };
 
       hostDefFor =

modules/autodeploy.nix

@@ -39,19 +39,9 @@ in
       default = [ ];
     };
 
-    repoOwner = lib.mkOption {
-      type = lib.types.str;
-      description = "User that owns the configuration checkout";
-    };
-
     stateDir = lib.mkOption {
       type = lib.types.str;
     };
-
-    hostname = lib.mkOption {
-      type = lib.types.str;
-      default = config.networking.hostName;
-    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -68,8 +58,6 @@ in
         DEPLOY_BRANCH = cfg.branch;
         STATE_DIR = cfg.stateDir;
         REPO_DIR = "/persist/@configuration";
-        REPO_OWNER = cfg.repoOwner;
-        HOSTNAME = cfg.hostname;
       };
 
       serviceConfig = {

packages/server-autodeploy.nix

@@ -3,8 +3,6 @@
   git,
   curl,
   jq,
-  util-linux,
-  openssh,
 }:
 import ./mk-script.nix { inherit writeShellApplication; } {
   name = "server-autodeploy";
@@ -12,7 +10,5 @@ import ./mk-script.nix { inherit writeShellApplication; } {
     git
     curl
     jq
-    util-linux
-    openssh
   ];
 }

scripts/server-autodeploy.sh

@@ -6,15 +6,12 @@ mkdir -p "$STATE_DIR"
 exec 9>"$STATE_DIR/lock"
 flock -n 9 || { echo "another deploy running"; exit 0; }
 
-runas() { runuser -u "$REPO_OWNER" -- "$@"; }
-
 report_status() {
-  echo "updating status to: $1 - $2"
   [[ -f "$TOKEN_FILE" ]] || return 0
   curl -sf -X POST \
     -H "Authorization: token $(<"$TOKEN_FILE")" \
     -H "Content-Type: application/json" \
-    -d "$(jq -n --arg s "$1" --arg d "$2" --arg c "deploy/$HOSTNAME" \
+    -d "$(jq -n --arg s "$1" --arg d "$2" --arg c "deploy/$(hostname)" \
       '{state:$s,description:$d,context:$c}')" \
     "$GITEA_URL/api/v1/repos/$GITEA_REPO/statuses/$3" >/dev/null
 }
@@ -27,9 +24,9 @@ export GIT_CONFIG_VALUE_0=ssh
 export GIT_CONFIG_KEY_1=gpg.ssh.allowedSignersFile
 export GIT_CONFIG_VALUE_1="$ALLOWED_SIGNERS"
 
-runas git fetch origin --tags --prune-tags
+git fetch origin --tags --prune-tags
 
-latest=$(runas git describe --abbrev=0 "$BRANCH" 2>/dev/null) || {
+latest=$(git describe --abbrev=0 "$BRANCH" 2>/dev/null) || {
   echo "no tags on $BRANCH"
   exit 0
 }
@@ -39,26 +36,23 @@ current=$(cat "$STATE_DIR/tag" 2>/dev/null) || true
 
 echo "new tag: $latest (current: ${current:-none})"
 
-runas git tag -v "$latest" || {
+git tag -v "$latest" || {
-  sha=$(runas git rev-list -1 "$latest")
+  sha=$(git rev-list -1 "$latest")
   report_status "failure" "tag signature verification failed" "$sha"
   exit 1
 }
 
-sha=$(runas git rev-list -1 "$latest")
+sha=$(git rev-list -1 "$latest")
 report_status "pending" "deploying $latest" "$sha"
 
-label_dir=$(mktemp -d)
+# build from remote, pinned to the verified rev - no local checkout needed
-echo "$latest" > "$label_dir/label"
+flake_url="git+${GITEA_URL}/${GITEA_REPO}?ref=refs/tags/${latest}&rev=${sha}#$(hostname)"
-flake_url="git+${GITEA_URL}/${GITEA_REPO}?ref=refs/tags/${latest}&rev=${sha}#$HOSTNAME"
 
-if nixos-rebuild switch --flake "$flake_url" --override-input deploy-label "path:$label_dir"; then
+if nixos-rebuild switch --flake "$flake_url"; then
-  rm -rf "$label_dir"
   echo "$latest" > "$STATE_DIR/tag"
   report_status "success" "deployed $latest" "$sha"
   echo "deployed $latest"
 else
-  rm -rf "$label_dir"
   report_status "failure" "nixos-rebuild failed" "$sha"
   exit 1
 fi

tests/server-n0/integration.py

@@ -336,28 +336,9 @@ with subtest("(functional): published ports follow the container's lifetime"):
 with subtest("(functional): declared devices are usable in-container"):
     for name, devices in DEVICES.items():
         for dev in devices:
-            # opened, not stat'd: without DeviceAllow= the node is still visible
             server.succeed(ct_cmd(name, f"exec 3<> {dev}"))
 
 
-with subtest("(functional): /dev/kvm actually initializes, not just opens"):
-    # a wrong-gid or unmapped node still opens but fails the ioctls qemu
-    # needs, so boot with no disk (never completes) and kill it - the
-    # failure mode this catches is qemu refusing to start at all.
-    for name, devices in DEVICES.items():
-        if "/dev/kvm" not in devices:
-            continue
-        out = server.succeed(
-            ct_cmd(
-                name,
-                f"{TIMEOUT} 3 qemu-system-x86_64 -enable-kvm -m 256 -nographic -no-reboot "
-                ">/tmp/qemu.out 2>&1; cat /tmp/qemu.out",
-            )
-        )
-        assert "Permission denied" not in out, f"{name}: qemu couldn't use /dev/kvm:\n{out}"
-        assert "Could not access KVM" not in out, f"{name}: qemu couldn't use /dev/kvm:\n{out}"
-
-
 with subtest("(isolation): devices reach only the container that declared them"):
     for name in enterable:
         for dev in {d for ds in DEVICES.values() for d in ds} - set(DEVICES.get(name, [])):