File Metrics for Bash

This document outlines the definition of file metrics for Bash.

complexity

The "complexity" metric counts:

if and elif statements
ternary operators: <condition> ? x : y
for loops : for ...; do
while loops: while ...; do
until loops: until ...; do
case item in case-statements, incl. default case item *). A case item with multiple values counts only once.
```
case $variable in
    <case item>)
    ;;
```
operators && and || (except the ones placed after the first heredoc delimiter), used for:
- concatenating function calls: fun1 && fun2
- creating condition: ( <condition 1> && <condition 2>)
everything counted for the "functions" metric

It does not count:

logical operators -a and -o
operators && and || placed after the first heredoc delimiter, like: cat << EOF && echo "Here document executed successfully."

functions

The "functions" metric counts:

function definitions:
functionName(){...}
function functionName(){...}

classes

Bash doesn't have classes, so the value for this metric is always 0.

lines_of_code, comment_lines, real_lines_of_code and keywords_in_comments