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

whoami

---

(program
  (command (command_name (word))))

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

cat file1.txt
git diff --word-diff=color -- file1.txt file2.txt

---

(program
  (command (command_name (word)) (word))
  (command (command_name (word)) (word) (word) (word) (word) (word)))

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

echo "hello $(whoami), this is $(uname)"
echo 'hi'

---

(program
  (command (command_name (word)) (string
    (command_substitution (command (command_name (word))))
    (command_substitution (command (command_name (word))))))
  (command (command_name (word)) (raw_string)))

===============================
Quoted command names
===============================

"$a/$b" c

---

(program
  (command
    (command_name (string (simple_expansion (variable_name)) (simple_expansion (variable_name))))
    (word)))

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

exit 1

---

(program
  (command (command_name (word)) (word)))

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

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

---

(program
  (command
    (variable_assignment (variable_name) (word))
    (command_name (word)))
  (command
    (variable_assignment (variable_name) (word))
    (variable_assignment (variable_name) (string))
    (command_name (word))
    (word)
    (word)))

===================================
Empty environment variables
===================================

VAR1=
VAR2= echo

---

(program
  (variable_assignment (variable_name))
  (command (variable_assignment (variable_name)) (command_name (word))))

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

whoami | cat
cat foo | grep -v bar

---

(program
  (pipeline
    (command (command_name (word)))
    (command (command_name (word))))
  (pipeline
    (command (command_name (word)) (word))
    (command (command_name (word)) (word) (word))))

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

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

---

(program
  (list
    (list
      (pipeline
        (command (command_name (word)))
        (command (command_name (word))))
      (command (command_name (word))))
    (command (command_name (word))))
  (list
    (command (command_name (word)) (word) (word))
    (command (command_name (word)) (word))))

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

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

---

(program
  (command
    (command_name (word))
    (file_redirect (word)))
  (command
    (command_name (word))
    (word)
    (word)
    (file_redirect (word)))
  (command
    (file_redirect (file_descriptor) (word))
    (command_name (word))))

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

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

bash -c <<JS
echo hi
JS

---

(program
  (command
    (command_name (word))
    (heredoc_redirect (heredoc)))
  (command
    (command_name (word))
    (word)
    (heredoc_redirect (heredoc))))

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

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

exit

---

(program
  (command
    (command_name (word))
    (heredoc_redirect (heredoc
      (simple_expansion (variable_name))
      (expansion (variable_name)))))
  (command (command_name (word))))