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((comment) @injection.content
  (#set! injection.language "comment"))

((regex) @injection.content
  (#set! injection.language "regex"))

((heredoc_redirect
  (heredoc_body) @injection.content
  (heredoc_end) @injection.language)
  (#downcase! @injection.language))

; printf 'format'
((command
  name: (command_name) @_command
  .
  argument: [
    (string
      (string_content) @injection.content)
    (concatenation
      (string
        (string_content) @injection.content))
    (raw_string) @injection.content
    (concatenation
      (raw_string) @injection.content)
  ])
  (#eq? @_command "printf")
  (#set! injection.language "printf"))

; printf -v var 'format'
((command
  name: (command_name) @_command
  argument: (word) @_arg
  .
  (_)
  .
  argument: [
    (string
      (string_content) @injection.content)
    (concatenation
      (string
        (string_content) @injection.content))
    (raw_string) @injection.content
    (concatenation
      (raw_string) @injection.content)
  ])
  (#eq? @_command "printf")
  (#eq? @_arg "-v")
  (#set! injection.language "printf"))

; printf -- 'format'
((command
  name: (command_name) @_command
  argument: (word) @_arg
  .
  argument: [
    (string
      (string_content) @injection.content)
    (concatenation
      (string
        (string_content) @injection.content))
    (raw_string) @injection.content
    (concatenation
      (raw_string) @injection.content)
  ])
  (#eq? @_command "printf")
  (#eq? @_arg "--")
  (#set! injection.language "printf"))