ci: centralize verification command

Author: blauerberg

.github/workflows/ci.yml

@@ -17,6 +17,4 @@ jobs:
           sudo apt-get install -y zsh
 
       - name: Run verification commands
-        run: |
-          for test in tests/*.sh; do sh "$test"; done
-          zsh -n zsh/zshrc
+        run: scripts/verify.sh

DEVELOPMENT.md

@@ -21,8 +21,7 @@ exercises the changed behavior.
 - For repository-wide shell checks, run:
 
 ```sh
-for test in tests/*.sh; do sh "$test"; done
-zsh -n zsh/zshrc
+scripts/verify.sh
 ```
 
 Prefer testing dotfiles contracts such as loader behavior, public environment

scripts/verify.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+set -eu
+
+repo_root=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+
+for test in "$repo_root"/tests/*.sh; do
+  sh "$test"
+done
+
+zsh -n "$repo_root/zsh/zshrc"