Class: CodeRay::Scanners::Bash

Inherits:
Scanner
  • Object
show all
Defined in:
lib/coderay/scanners/bash.rb

Constant Summary collapse

RESERVED_WORDS = 
%w(
  ! [[ ]] case do done elif else esac fi for function if in select then time until while { }
)
COMMANDS = 
%w(
  : . break cd continue eval exec exit export getopts hash pwd
  readonly return shift test [ ] times trap umask unset
)
BASH_COMMANDS = 
%w(
  alias bind builtin caller command declare echo enable help let
  local logout printf read set shopt source type typeset ulimit unalias
)
VARIABLES = 
%w(
  CDPATH HOME IFS MAIL MAILPATH OPTARG OPTIND PATH PS1 PS2
)
BASH_VARIABLES = 
%w(
  BASH BASH_ARGC BASH_ARGV BASH_COMMAND BASH_ENV BASH_EXECUTION_STRING
  BASH_LINENO BASH_REMATCH BASH_SOURCE BASH_SUBSHELL BASH_VERSINFO
  BASH_VERSINFO[0] BASH_VERSINFO[1] BASH_VERSINFO[2] BASH_VERSINFO[3] 
  BASH_VERSINFO[4] BASH_VERSINFO[5] BASH_VERSION COLUMNS COMP_CWORD
  COMP_LINE COMP_POINT COMP_WORDBREAKS COMP_WORDS COMPREPLAY DIRSTACK
  EMACS EUID FCEDIT FIGNORE FUNCNAME GLOBIGNORE GROUPS histchars HISTCMD
  HISTCONTROL HISTFILE HISTFILESIZE HISTIGNORE HISTSIZE HISTTIMEFORMAT
  HOSTFILE HOSTNAME HOSTTYPE IGNOREEOF INPUTRC LANG LC_ALL LC_COLLATE
  LC_CTYPE LC_MESSAGE LC_NUMERIC LINENNO LINES MACHTYPE MAILCHECK OLDPWD
  OPTERR OSTYPE PIPESTATUS POSIXLY_CORRECT PPID PROMPT_COMMAND PS3 PS4 PWD
  RANDOM REPLAY SECONDS SHELL SHELLOPTS SHLVL TIMEFORMAT TMOUT TMPDIR UID
)
PRE_CONSTANTS = 
/ \$\{? (?: \# | \? | \d | \* | @ | - | \$ | \! | _ ) \}? /ox
IDENT_KIND = 
WordList.new(:ident).
add(RESERVED_WORDS, :reserved).
add(COMMANDS, :method).
add(BASH_COMMANDS, :method).
add(VARIABLES, :pre_type).
add(BASH_VARIABLES, :pre_type)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Bash

Returns a new instance of Bash.



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# File 'lib/coderay/scanners/bash.rb', line 54

def initialize(*args)
  super(*args)
  @state = :initial
  @quote = nil
end

Instance Attribute Details

#quote ⇒ Object (readonly)

Returns the value of attribute quote.



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# File 'lib/coderay/scanners/bash.rb', line 52

def quote
  @quote
end

#state ⇒ Object (readonly)

Returns the value of attribute state.



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# File 'lib/coderay/scanners/bash.rb', line 52

def state
  @state
end

Instance Method Details

#handle_error(match, options) ⇒ Object 



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# File 'lib/coderay/scanners/bash.rb', line 194

def handle_error(match, options)
  o = {:ignore_errors => true}.merge(options)
  if o[:ignore_errors]
    [match, :plain]
  else
    [">>>>>#{match}<<<<<", :error]        
  end
end

#scan_tokens(tokens, options) ⇒ Object 



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# File 'lib/coderay/scanners/bash.rb', line 60

def scan_tokens tokens, options

  until eos?
    kind = match = nil

    if match = scan(/\n/)
      tokens << [match, :end_line]
      next
    end

    if @state == :initial
      if  match = scan(/\A#!.*/)
        kind = :directive
      elsif match = scan(/#.*/)
        kind = :comment
      elsif match = scan(/(?:\. |source ).*/)
        kind = :reserved
      elsif match = scan(/(?:\\.|,)/)
        kind = :plain
      elsif match = scan(/;/)
        kind = :delimiter
      elsif match = scan(/(?:"|`)/)
        @state = :quote
        @quote = match
        tokens << [:open, :string] if @quote == '"'
        tokens << [:open, :shell] if @quote == '`'
        tokens << [match, :delimiter]
        next
      elsif match = scan(/'[^']*'/)
        kind = :string
      elsif match = scan(/(?: \& | > | < | \| >> | << | >\& )/ox)
        kind = :bin
      elsif match = scan(/\d+[\.-](?:\d+[\.-]?)+/)
        #versions, dates, and hyphen delimited numbers
        kind = :float
      elsif match = scan(/\d+\.\d+\s+/)
        kind = :float
      elsif match = scan(/\d+/)
        kind = :integer
      elsif match = scan(/ (?: \$\(\( | \)\) ) /x)
        kind = :global_variable
      elsif match = scan(/ \$\{ [^\}]+ \} /ox)
        match =~ /\$\{(.*)\}/
        kind = IDENT_KIND[$1]
        kind = :instance_variable if kind == :ident
      elsif match = scan(/ \$\( [^\)]+ \) /ox)
        kind = :shell
      elsif match = scan(PRE_CONSTANTS)
        kind = :pre_constant
      elsif match = scan(/[^\s'"]*[A-Za-z_][A-Za-z_0-9]*\+?=/)
        match =~ /(.*?)([A-Za-z_][A-Za-z_0-9]*)(\+?=)/
        str = $1
        pre = $2
        op = $3
        kind = :plain
        if str.to_s.strip.empty?
          kind = IDENT_KIND[pre]
          kind = :instance_variable if kind == :ident
          tokens << [pre, kind]
          tokens << [op, :operator]
          next
        end
      elsif match = scan(/[A-Za-z_]+\[[A-Za-z_\d]+\]/)
        # array
        kind = IDENT_KIND(match)
        kind = :instance_variable if kind == :ident
      elsif match = scan(/ \$[A-Za-z_][A-Za-z_0-9]* /ox)
        match =~ /\$(.*)/
        kind = IDENT_KIND[$1]
        kind = :instance_variable if kind == :ident
      elsif match = scan(/read \S+/)
        match =~ /read(\s+)(\S+)/
        tokens << ['read', :method]
        tokens << [$1, :space]
        tokens << [$2, :instance_variable]
        next
      elsif match = scan(/[\!\:\[\]\{\}]/)
        kind = :reserved
      elsif match = scan(/ [A-Za-z_][A-Za-z_\d]*;? /x)
        match =~ /([^;]+);?/
        kind = IDENT_KIND[$1]
        if match[/([^;]+);$/]
          tokens << [$1, kind]
          tokens << [';', :delimiter]
          next
        end
      elsif match = scan(/(?: = | - | \+ | \{ | \} | \( | \) | && | \|\| | ;; | ! )/ox)
        kind = :operator
      elsif match = scan(/\s+/)
        kind = :space
      elsif match = scan(/[^ \$"'`\d]/)
        kind = :plain
      elsif match = scan(/.+/)
        # this shouldn't be :reserved for highlighting bad matches
        match, kind = handle_error(match, options)
      end
    elsif @state == :quote
      if (match = scan(/\\.?/))
        kind = :content
      elsif match = scan(/#{@quote}/)
        tokens << [match, :delimiter]
        tokens << [:close, :string] if @quote == '"'
        tokens << [:close, :shell] if @quote == "`"
        @quote = nil
        @state = :initial
        next
        #kind = :symbol
      elsif match = scan(PRE_CONSTANTS)
        kind = :pre_constant
      elsif match = scan(/ \$\{?[A-Za-z_][A-Za-z_\d]*\}? /x)
        kind = IDENT_KIND[match]
        kind = :instance_variable if kind == :ident
      elsif (@quote == '`') and (match = scan(/\$"/))
        kind = :content
      elsif (@quote == '"') and (match = scan(/\$`/))
        kind = :content
      elsif match = scan(/[^#{@quote}\$\\]+/)
        kind = :content
      else match = scan(/.+/)
        # this shouldn't be
        #kind = :reserved
        #raise match 
        match, kind = handle_error(match, options)
      end
    end
  
    match ||= matched
    tokens << [match, kind]
  end

  tokens
end