feat: rewrite new-data-fix script in shell

scripts/new-data-fix.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+to_slug() {
+    local raw="$1"
+    echo "$raw" | tr '[:upper:]' '[:lower:]' | sed -E 's/[^a-z0-9]+/_/g' | sed -E 's/^_+|_+$//g'
+}
+
+format_yyyymmdd() {
+    date '+%Y%m%d'
+}
+
+main() {
+    local raw_name="${1:-}"
+    local slug
+    slug=$(to_slug "$raw_name")
+
+    if [[ -z "$slug" ]]; then
+        echo "usage: $0 <name>" >&2
+        exit 1
+    fi
+
+    local id
+    id="$(format_yyyymmdd)_${slug}"
+    local dir
+    dir="$(pwd)/internal/database/fixes"
+    local file_path
+    file_path="${dir}/${id}.go"
+
+    mkdir -p "$dir"
+
+    if [[ -f "$file_path" ]]; then
+        echo "data fix already exists: ${file_path}" >&2
+        exit 1
+    fi
+
+    cat > "$file_path" <<EOF
+package fixes
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+)
+
+func init() {
+	Register(Fix{
+		ID: "${id}",
+		Apply: func(ctx context.Context, sqlDB *sql.DB) error {
+			// TODO: implement fix
+			// _, err := sqlDB.ExecContext(ctx, \`UPDATE ...\`)
+			// if err != nil { return fmt.Errorf("...: %w", err) }
+			return fmt.Errorf("unimplemented data fix: ${id}")
+		},
+	})
+}
+EOF
+
+    echo "$file_path"
+}
+
+main "$@"