test: add lefthook as git hook

lefthook.yaml

@@ -0,0 +1,14 @@
+---
+skip_output: [meta, success]
+no_tty: true
+
+commit-msg:
+  commands:
+    lint:commitmsg:
+      run: cat {1} | convco check --from-stdin
+pre-push:
+  parallel: false
+  commands:
+    check:nix:
+      tags: check
+      run: nix flake check

taskfile.yaml

@@ -0,0 +1,47 @@
+---
+version: "3"
+set: [errexit, pipefail, nounset]
+shopt: [globstar]
+tasks:
+  check:sh:
+    cmds:
+      - shellcheck **/*.sh
+    sources:
+      - "**/*.sh"
+  check:typos:
+    cmds:
+      - typos .
+  check:flake:
+    cmds:
+      - nix flake check
+    sources:
+      - "**/*.nix"
+
+  build:*:
+    silent: true
+    vars:
+      TARGET: "{{index .MATCH 0}}"
+    cmds:
+      - nixos-rebuild --flake .#{{.TARGET}} build
+    sources: 
+      - "**/*.nix"
+
+  switch:*:
+    silent: true
+    vars:
+      TARGET: "{{index .MATCH 0}}"
+    requires:
+      vars: [TARGET]
+    cmds:
+      - doas nixos-rebuild --flake .#{{}} switch
+    sources: 
+      - "**/*.nix"
+
+  test:*:
+    silent: true
+    vars:
+      TARGET: "{{index .MATCH 0}}"
+    cmds:
+      - doas nixos-rebuild --flake .#{{.TARGET}} test
+    sources: 
+      - "**/*.nix"