===============================
Commands
===============================

whoami

---

(program
  (command (simple_command (command_name))))

===============================
Commands with arguments
===============================

cat file1.txt
cat -n file1.txt file2.txt

---

(program
  (command (simple_command (command_name) (argument)))
  (command (simple_command (command_name) (argument) (argument) (argument))))

===================================
Commands with environment variables
===================================

VAR1=1 ./script/test
VAR1=a VAR2="ok" git diff --word-diff=color

---

(program
  (command (simple_command
    (environment_variable_assignment (variable_name) (argument))
    (command_name)))
  (command (simple_command
    (environment_variable_assignment (variable_name) (argument))
    (environment_variable_assignment (variable_name) (argument))
    (command_name)
    (argument)
    (argument))))

===================================
Pipelines
===================================

whoami | cat
cat foo | grep -v bar

---

(program
  (command (pipeline
    (simple_command (command_name))
    (simple_command (command_name))))
  (command (pipeline
    (simple_command (command_name) (argument))
    (simple_command (command_name) (argument) (argument)))))

===================================
Lists
===================================

a | b && c; d e f | e g

---

(program
  (command (list
    (list
      (pipeline
        (simple_command (command_name))
        (simple_command (command_name)))
      (simple_command (command_name)))
    (pipeline
      (simple_command (command_name) (argument) (argument))
      (simple_command (command_name) (argument))))))

===============================
File redirects
===============================

whoami > /dev/null
cat a b 2> /dev/null
2>&1 whoami

---

(program
  (command (simple_command
    (command_name)
    (file_redirect (file_name))))
  (command (simple_command
    (command_name)
    (argument)
    (argument)
    (file_redirect (file_descriptor) (file_name))))
  (command (simple_command
    (file_redirect (file_descriptor) (file_descriptor))
    (command_name))))

===============================
Heredoc redirects
===============================

node <<JS
console.log("hi")
JS

bash -c <<JS
echo hi
JS

---

(program
  (command (simple_command
    (command_name)
    (heredoc_redirect (heredoc))))
  (command (simple_command
    (command_name)
    (argument)
    (heredoc_redirect (heredoc)))))

===============================
Heredocs with variables
===============================

node <<JS
a $B ${C}
JS

exit

---

(program
  (command (simple_command
    (command_name)
    (heredoc_redirect (heredoc
      (expansion (variable_name))
      (operator_expansion (variable_name))))))
  (command (simple_command (command_name))))

===============================
Variable expansions
===============================

cat $FOO

---

(program
  (command (simple_command
    (command_name)
    (expansion (variable_name)))))

===============================
Variable expansion operators
===============================

cat ${BAR} ${ABC=def} ${GHI:?jkl}

---

(program
  (command (simple_command
    (command_name)
    (operator_expansion (variable_name))
    (operator_expansion (variable_name) (argument))
    (operator_expansion (variable_name) (argument)))))