1 files changed, 50 insertions, 0 deletions
diff --git a/scripts/linters/sorted_dependencies.rb b/scripts/linters/sorted_dependencies.rb
new file mode 100644
index 0000000..16ec894
--- /dev/null
+++ b/scripts/linters/sorted_dependencies.rb
@@ -0,0 +1,50 @@
+def sorted_dependencies(root_dir)
+  pattern = root_dir.join('crates', '*', 'Cargo.toml').to_s
+  errors = Dir.glob(pattern).sort.flat_map do |path|
+    relative = Pathname.new(path).relative_path_from(root_dir).to_s
+    sections = parse_dep_sections(File.read(path))
+
+    %w[dependencies dev-dependencies].filter_map do |section|
+      deps = sections[section]
+      next if deps.nil? || deps.empty?
+
+      expected = sort_dep_names(deps)
+      next if deps == expected
+
+      { path: relative, section: section, actual: deps, expected: expected }
+    end
+  end
+
+  return true if errors.empty?
+
+  puts 'Found unsorted `[dependencies]` / `[dev-dependencies]` in Cargo.toml.'
+  puts 'Entries must be alphabetical, with `mozart-*` crates listed before others:'
+  errors.each do |err|
+    puts "  #{err[:path]} [#{err[:section]}]"
+    puts "    actual:   #{err[:actual].join(', ')}"
+    puts "    expected: #{err[:expected].join(', ')}"
+  end
+  false
+end
+
+def parse_dep_sections(content)
+  sections = {}
+  current = nil
+
+  content.each_line do |line|
+    stripped = line.chomp
+    if stripped =~ /\A\s*\[([^\]]+)\]\s*\z/
+      current = $1
+      sections[current] ||= []
+    elsif current && stripped =~ /\A([A-Za-z0-9_-]+)\s*[.=]/
+      sections[current] << $1
+    end
+  end
+
+  sections
+end
+
+def sort_dep_names(deps)
+  mozart, other = deps.partition { |d| d.start_with?('mozart-') }
+  mozart.sort + other.sort
+end