refactor(scripts): clean up bash scripts

script/generate-bindings

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 output_path=lib/binding_rust/bindings.rs
-header_path='lib/include/tree_sitter/api.h'
+header_path=lib/include/tree_sitter/api.h
 no_derive_copy=(
   TSInput
   TSLanguage
@@ -19,13 +19,13 @@ no_copy=$(IFS='|'; echo "${no_derive_copy[*]}")
 
 file_version=$(head -n1 "$output_path" | cut -d' ' -f6)
 tool_version=$(bindgen --version | cut -d' ' -f2)
-higher_version=$(echo -e "${file_version}\n${tool_version}" | sort -V | tail -n1)
+higher_version=$(printf '%s\n' "$file_version" "$tool_version" | sort -V | tail -n1)
 
-if [ "$higher_version" != "$tool_version" ]; then
-  echo "Latest used bindgen version was $file_version" >&2
-  echo "Currently installed bindgen CLI version is $tool_version" >&2
-  echo >&2
-  echo "It's needed to upgrade bindgen CLI first with \`cargo install bindgen-cli\`" >&2
+if [[ "$higher_version" != "$tool_version" ]]; then
+  printf 'Latest used bindgen version was %s\n' "$file_version" >&2
+  printf 'Currently installed bindgen CLI version is %s\n\n' "$tool_version" >&2
+  # shellcheck disable=SC2016
+  printf 'You must upgrade bindgen CLI first with `cargo install bindgen-cli`\n' >&2
   exit 1
 fi
 
@@ -33,11 +33,11 @@ bindgen                                        \
   --no-layout-tests                            \
   --allowlist-type '^TS.*'                     \
   --allowlist-function '^ts_.*'                \
-  --allowlist-var "^TREE_SITTER.*"             \
+  --allowlist-var '^TREE_SITTER.*'             \
   --blocklist-type '^__.*'                     \
   --no-prepend-enum-name                       \
   --no-copy "$no_copy"                         \
-  $header_path                                 \
+  "$header_path"                               \
   --                                           \
   -D TREE_SITTER_FEATURE_WASM                  \
-  > $output_path
+  > "$output_path"