just: Introduce commit-msg hook for typos

Add a `commit-msg` hook to continuously run `typos` against the COMMIT_MSG.

justfile

@@ -1,4 +1,4 @@
-hooks := "pre-commit pre-push post-checkout"
+hooks := "pre-commit pre-push post-checkout commit-msg"
 hook-script := "scripts/git-hook-template.sh"
 
 WARN := "⚠️ " + YELLOW + BOLD
@@ -14,6 +14,12 @@ default: check-hooks
 [group('hooks')]
 post-checkout:
 
+# Run commit-msg checks
+[group('hooks')]
+commit-msg file: (verify-tool "typos" "typos-cli")
+    @echo "{{CHECK}}Checking commit message for typos...{{NORMAL}}"
+    @NORMAL="{{NORMAL}}" WARN="{{WARN}}" scripts/just/commit-msg.sh "{{file}}"
+
 # Run pre-commit checks
 [group('hooks')]
 pre-commit: format-rust check-rust check-docs check-typos check-spelling check-scripts check-keywords format-nix

scripts/git-hook-template.sh

@@ -3,7 +3,7 @@ set -euo pipefail
 
 readonly HOOK="${HOOK:-$(basename "$0")}"
 
-if ! [[ "$HOOK" =~ ^(pre-(commit|push)|post-checkout)$ ]]
+if ! [[ "$HOOK" =~ ^(pre-(commit|push)|post-checkout|commit-msg)$ ]]
 then
     echo "Unknown hook '${HOOK}'."
     exit 1
@@ -41,5 +41,10 @@ then
     esac
 fi
 
-just "$HOOK"
-
+# Execute the appropriate just recipe based on the hook name.
+if [ "$HOOK" = "commit-msg" ]
+then
+    just "$HOOK" "$1"
+else
+    just "$HOOK"
+fi

scripts/just/commit-msg.sh

@@ -0,0 +1,16 @@
+#! /usr/bin/env bash
+set -euo pipefail
+
+FILE=$1
+
+while ! typos "$FILE"; do \
+    exec < /dev/tty; \
+    echo ""; \
+    printf "%sTypos found.%s (e)dit, (c)ontinue, or (a)bort? [E/c/a] " "${WARN}" "${NORMAL}"; \
+    read -r response; \
+    case "$response" in \
+        [cC]*) exit 0 ;; \
+        [aA]*) exit 1 ;; \
+        *) ${EDITOR:-nano} "$FILE" ;; \
+    esac; \
+done