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A naive YAML lexer.
Does not try to be smart in anyway. Instead, just highlights what it can. Used this reference: https://learnxinyminutes.com/docs/yaml/ Fixes #13.
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75
lexers/yaml.go
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75
lexers/yaml.go
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@ -0,0 +1,75 @@
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package lexers
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import (
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. "github.com/alecthomas/chroma" // nolint
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)
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// Prism.languages.yaml = {
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// 'scalar': {
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// pattern: /([\-:]\s*(![^\s]+)?[ \t]*[|>])[ \t]*(?:((?:\r?\n|\r)[ \t]+)[^\r\n]+(?:\3[^\r\n]+)*)/,
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// lookbehind: true,
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// alias: 'string'
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// },
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// 'comment': /#.*/,
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// 'key': {
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// pattern: /(\s*(?:^|[:\-,[{\r\n?])[ \t]*(![^\s]+)?[ \t]*)[^\r\n{[\]},#\s]+?(?=\s*:\s)/,
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// lookbehind: true,
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// alias: 'atrule'
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// },
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// 'directive': {
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// pattern: /(^[ \t]*)%.+/m,
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// lookbehind: true,
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// alias: 'important'
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// },
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// 'datetime': {
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// pattern: /([:\-,[{]\s*(![^\s]+)?[ \t]*)(\d{4}-\d\d?-\d\d?([tT]|[ \t]+)\d\d?:\d{2}:\d{2}(\.\d*)?[ \t]*(Z|[-+]\d\d?(:\d{2})?)?|\d{4}-\d{2}-\d{2}|\d\d?:\d{2}(:\d{2}(\.\d*)?)?)(?=[ \t]*($|,|]|}))/m,
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// lookbehind: true,
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// alias: 'number'
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// },
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// 'boolean': {
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// pattern: /([:\-,[{]\s*(![^\s]+)?[ \t]*)(true|false)[ \t]*(?=$|,|]|})/im,
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// lookbehind: true,
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// alias: 'important'
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// },
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// 'null': {
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// pattern: /([:\-,[{]\s*(![^\s]+)?[ \t]*)(null|~)[ \t]*(?=$|,|]|})/im,
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// lookbehind: true,
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// alias: 'important'
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// },
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// 'string': {
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// pattern: /([:\-,[{]\s*(![^\s]+)?[ \t]*)("(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*')(?=[ \t]*($|,|]|}))/m,
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// lookbehind: true,
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// greedy: true
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// },
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// 'number': {
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// pattern: /([:\-,[{]\s*(![^\s]+)?[ \t]*)[+\-]?(0x[\da-f]+|0o[0-7]+|(\d+\.?\d*|\.?\d+)(e[\+\-]?\d+)?|\.inf|\.nan)[ \t]*(?=$|,|]|})/im,
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// lookbehind: true
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// },
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// 'tag': /![^\s]+/,
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// 'important': /[&*][\w]+/,
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// 'punctuation': /---|[:[\]{}\-,|>?]|\.\.\./
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var YAML = Register(MustNewLexer(
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&Config{
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Name: "YAML",
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Aliases: []string{"yaml"},
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Filenames: []string{"*.yaml", "*.yml"},
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MimeTypes: []string{"text/x-yaml"},
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},
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Rules{
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"root": {
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{`\s+`, Whitespace, nil},
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{`#.*`, Comment, nil},
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{`!![^\s]+`, CommentPreproc, nil},
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{`&[^\s]+`, CommentPreproc, nil},
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{`\*[^\s]+`, CommentPreproc, nil},
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{Words(``, `\b`, "true", "false", "null"), KeywordConstant, nil},
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{`"(?:\\.|[^"])+"`, StringDouble, nil},
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{`\d\d\d\d-\d\d-\d\d([T ]\d\d:\d\d:\d\d(\.\d+)?(Z|\s+[-+]\d+)?)?`, LiteralDate, nil},
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{`([>|])(\s+)((?:(?:.*?$)(?:[\n\r]*?\2)?)*)`, ByGroups(StringDoc, StringDoc, StringDoc), nil},
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{`[+\-]?(0x[\da-f]+|0o[0-7]+|(\d+\.?\d*|\.?\d+)(e[\+\-]?\d+)?|\.inf|\.nan)\b`, Number, nil},
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{`[?:,\[\]]`, Punctuation, nil},
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{`.`, Text, nil},
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},
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},
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))
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@ -20,4 +20,5 @@ var SwapOff = Register(chroma.MustNewStyle("swapoff", map[chroma.TokenType]strin
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chroma.NameAttribute: "#ansiteal",
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chroma.NameVariable: "bold",
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chroma.Error: "#ansired",
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chroma.LiteralDate: "bold #ansiyellow",
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}))
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