fish.go

Documentation: github.com/alecthomas/chroma/lexers/f

     1  package f
     2  
     3  import (
     4  	. "github.com/alecthomas/chroma" // nolint
     5  	"github.com/alecthomas/chroma/lexers/internal"
     6  )
     7  
     8  // Fish lexer.
     9  var Fish = internal.Register(MustNewLazyLexer(
    10  	&Config{
    11  		Name:      "Fish",
    12  		Aliases:   []string{"fish", "fishshell"},
    13  		Filenames: []string{"*.fish", "*.load"},
    14  		MimeTypes: []string{"application/x-fish"},
    15  	},
    16  	fishRules,
    17  ))
    18  
    19  func fishRules() Rules {
    20  	keywords := []string{
    21  		`begin`, `end`, `if`, `else`, `while`, `break`, `for`, `return`, `function`, `block`,
    22  		`case`, `continue`, `switch`, `not`, `and`, `or`, `set`, `echo`, `exit`, `pwd`, `true`,
    23  		`false`, `cd`, `cdh`, `count`, `test`,
    24  	}
    25  	keywordsPattern := Words(`\b`, `\b`, keywords...)
    26  
    27  	builtins := []string{
    28  		`alias`, `bg`, `bind`, `breakpoint`, `builtin`, `argparse`, `abbr`, `string`, `command`,
    29  		`commandline`, `complete`, `contains`, `dirh`, `dirs`, `disown`, `emit`, `eval`, `exec`,
    30  		`fg`, `fish`, `fish_add_path`, `fish_breakpoint_prompt`, `fish_command_not_found`,
    31  		`fish_config`, `fish_git_prompt`, `fish_greeting`, `fish_hg_prompt`, `fish_indent`,
    32  		`fish_is_root_user`, `fish_key_reader`, `fish_mode_prompt`, `fish_opt`, `fish_pager`,
    33  		`fish_prompt`, `fish_right_prompt`, `fish_status_to_signal`, `fish_svn_prompt`,
    34  		`fish_title`, `fish_update_completions`, `fish_vcs_prompt`, `fishd`, `funced`,
    35  		`funcsave`, `functions`, `help`, `history`, `isatty`, `jobs`, `math`, `mimedb`, `nextd`,
    36  		`open`, `prompt_pwd`, `realpath`, `popd`, `prevd`, `psub`, `pushd`, `random`, `read`,
    37  		`set_color`, `source`, `status`, `suspend`, `trap`, `type`, `ulimit`, `umask`, `vared`,
    38  		`fc`, `getopts`, `hash`, `kill`, `printf`, `time`, `wait`,
    39  	}
    40  
    41  	return Rules{
    42  		"root": {
    43  			Include("basic"),
    44  			Include("interp"),
    45  			Include("data"),
    46  		},
    47  		"interp": {
    48  			{`\$\(\(`, Keyword, Push("math")},
    49  			{`\(`, Keyword, Push("paren")},
    50  			{`\$#?(\w+|.)`, NameVariable, nil},
    51  		},
    52  		"basic": {
    53  			{Words(`(?<=(?:^|\A|;|&&|\|\||\||`+keywordsPattern+`)\s*)`, `(?=;?\b)`, keywords...), Keyword, nil},
    54  			{`(?<=for\s+\S+\s+)in\b`, Keyword, nil},
    55  			{Words(`\b`, `\s*\b(?!\.)`, builtins...), NameBuiltin, nil},
    56  			{`#!.*\n`, CommentHashbang, nil},
    57  			{`#.*\n`, Comment, nil},
    58  			{`\\[\w\W]`, LiteralStringEscape, nil},
    59  			{`(\b\w+)(\s*)(=)`, ByGroups(NameVariable, Text, Operator), nil},
    60  			{`[\[\]()={}]`, Operator, nil},
    61  			{`(?<=\[[^\]]+)\.\.|-(?=[^\[]+\])`, Operator, nil},
    62  			{`<<-?\s*(\'?)\\?(\w+)[\w\W]+?\2`, LiteralString, nil},
    63  			{`(?<=set\s+(?:--?[^\d\W][\w-]*\s+)?)\w+`, NameVariable, nil},
    64  			{`(?<=for\s+)\w[\w-]*(?=\s+in)`, NameVariable, nil},
    65  			{`(?<=function\s+)\w(?:[^\n])*?(?= *[-\n])`, NameFunction, nil},
    66  			{`(?<=(?:^|\b(?:and|or|sudo)\b|;|\|\||&&|\||\(|(?:\b\w+\s*=\S+\s)) *)\w[\w-]*`, NameFunction, nil},
    67  		},
    68  		"data": {
    69  			{`(?s)\$?"(\\\\|\\[0-7]+|\\.|[^"\\$])*"`, LiteralStringDouble, nil},
    70  			{`"`, LiteralStringDouble, Push("string")},
    71  			{`(?s)\$'(\\\\|\\[0-7]+|\\.|[^'\\])*'`, LiteralStringSingle, nil},
    72  			{`(?s)'.*?'`, LiteralStringSingle, nil},
    73  			{`;`, Punctuation, nil},
    74  			{`&&|\|\||&|\||\^|<|>`, Operator, nil},
    75  			{`\s+`, Text, nil},
    76  			{`\b\d+\b`, LiteralNumber, nil},
    77  			{`(?<=\s+)--?[^\d][\w-]*`, NameAttribute, nil},
    78  			{".+?", Text, nil},
    79  		},
    80  		"string": {
    81  			{`"`, LiteralStringDouble, Pop(1)},
    82  			{`(?s)(\\\\|\\[0-7]+|\\.|[^"\\$])+`, LiteralStringDouble, nil},
    83  			Include("interp"),
    84  		},
    85  		"paren": {
    86  			{`\)`, Keyword, Pop(1)},
    87  			Include("root"),
    88  		},
    89  		"math": {
    90  			{`\)\)`, Keyword, Pop(1)},
    91  			{`[-+*/%^|&]|\*\*|\|\|`, Operator, nil},
    92  			{`\d+#\d+`, LiteralNumber, nil},
    93  			{`\d+#(?! )`, LiteralNumber, nil},
    94  			{`\d+`, LiteralNumber, nil},
    95  			Include("root"),
    96  		},
    97  	}
    98  }
    99
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