script: function style

top_words.sh

@@ -3,17 +3,22 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-url="${1:-}"
-basedir=$(dirname "$0")
+fetch_top_words() {
+  local url
+  local basedir
   
-if [[ "${url:-}" = "" ]]; then
+  url="${1:-}"
+  basedir=$(dirname "$0")
+  
+
+  if [[ "${url:-}" = "" ]]; then
     grep --only-matching --extended-regexp '[a-zA-Z]{3,}' "$basedir/README.md" \
     | tr '[:upper:]' '[:lower:]' \
     | grep --invert-match --word-regexp --fixed-strings --file=stopwords.txt \
     | sort \
     | uniq --count \
     | sort -n
-else
+  else
     curl "$url" \
     | grep --only-matching --extended-regexp '[a-zA-Z]{3,}' \
     | tr '[:upper:]' '[:lower:]' \
@@ -21,4 +26,6 @@ else
     | sort \
     | uniq --count \
     | sort -n
-fi
+  fi
+}
+fetch_top_words "$@"