sys/ns: implement automatic zone serial updates with a pre-commit hook

3 files changed, 18 insertions, 0 deletions

diff --git a/hooks/README b/hooks/README
new file mode 100644
index 0000000..176dc1c
--- /dev/null
+++ b/hooks/README
@@ -0,0 +1,2 @@
+$ git config core.hooksPath hooks
+$ man githooks
diff --git a/hooks/lib/update-zone-serials b/hooks/lib/update-zone-serials
new file mode 100755
index 0000000..272d5f6
--- /dev/null
+++ b/hooks/lib/update-zone-serials
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+set -e
+set -o pipefail
+
+nix eval --json '.#nixosConfigurations.gate.config.lib.local.zoneSerialUpdates' \
+	| nix run '.#increment-zone-serials' -- sys/ns/zones \
+	| while read file; do nix fmt -- "$file"; git add -v -- "$file"; done
diff --git a/hooks/pre-commit b/hooks/pre-commit
new file mode 100755
index 0000000..93e9b9a
--- /dev/null
+++ b/hooks/pre-commit
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+set -e
+exec >&2
+
+if git diff-index --cached HEAD -- | grep -q $'\tsys/ns/'; then
+	exec hooks/lib/update-zone-serials
+fi