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95 lines
3.1 KiB
95 lines
3.1 KiB
package b
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import (
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"regexp"
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. "github.com/alecthomas/chroma" // nolint
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"github.com/alecthomas/chroma/lexers/internal"
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)
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var bashAnalyserRe = regexp.MustCompile(`(?m)^#!.*/bin/(?:env |)(?:bash|zsh|sh|ksh)`)
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// Bash lexer.
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var Bash = internal.Register(MustNewLexer(
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&Config{
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Name: "Bash",
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Aliases: []string{"bash", "sh", "ksh", "zsh", "shell"},
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Filenames: []string{"*.sh", "*.ksh", "*.bash", "*.ebuild", "*.eclass", "*.exheres-0", "*.exlib", "*.zsh", "*.zshrc", ".bashrc", "bashrc", ".bash_*", "bash_*", "zshrc", ".zshrc", "PKGBUILD"},
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MimeTypes: []string{"application/x-sh", "application/x-shellscript"},
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},
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Rules{
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"root": {
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Include("basic"),
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{"`", LiteralStringBacktick, Push("backticks")},
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Include("data"),
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Include("interp"),
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},
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"interp": {
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{`\$\(\(`, Keyword, Push("math")},
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{`\$\(`, Keyword, Push("paren")},
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{`\$\{#?`, LiteralStringInterpol, Push("curly")},
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{`\$[a-zA-Z_]\w*`, NameVariable, nil},
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{`\$(?:\d+|[#$?!_*@-])`, NameVariable, nil},
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{`\$`, Text, nil},
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},
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"basic": {
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{`\b(if|fi|else|while|do|done|for|then|return|function|case|select|continue|until|esac|elif)(\s*)\b`, ByGroups(Keyword, Text), nil},
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{"\\b(alias|bg|bind|break|builtin|caller|cd|command|compgen|complete|declare|dirs|disown|echo|enable|eval|exec|exit|export|false|fc|fg|getopts|hash|help|history|jobs|kill|let|local|logout|popd|printf|pushd|pwd|read|readonly|set|shift|shopt|source|suspend|test|time|times|trap|true|type|typeset|ulimit|umask|unalias|unset|wait)(?=[\\s)`])", NameBuiltin, nil},
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{`\A#!.+\n`, CommentPreproc, nil},
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{`#.*(\S|$)`, CommentSingle, nil},
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{`\\[\w\W]`, LiteralStringEscape, nil},
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{`(\b\w+)(\s*)(\+?=)`, ByGroups(NameVariable, Text, Operator), nil},
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{`[\[\]{}()=]`, Operator, nil},
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{`<<<`, Operator, nil},
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{`<<-?\s*(\'?)\\?(\w+)[\w\W]+?\2`, LiteralString, nil},
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{`&&|\|\|`, Operator, nil},
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},
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"data": {
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{`(?s)\$?"(\\\\|\\[0-7]+|\\.|[^"\\$])*"`, LiteralStringDouble, nil},
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{`"`, LiteralStringDouble, Push("string")},
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{`(?s)\$'(\\\\|\\[0-7]+|\\.|[^'\\])*'`, LiteralStringSingle, nil},
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{`(?s)'.*?'`, LiteralStringSingle, nil},
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{`;`, Punctuation, nil},
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{`&`, Punctuation, nil},
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{`\|`, Punctuation, nil},
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{`\s+`, Text, nil},
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{`\d+(?= |$)`, LiteralNumber, nil},
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{"[^=\\s\\[\\]{}()$\"\\'`\\\\<&|;]+", Text, nil},
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{`<`, Text, nil},
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},
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"string": {
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{`"`, LiteralStringDouble, Pop(1)},
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{`(?s)(\\\\|\\[0-7]+|\\.|[^"\\$])+`, LiteralStringDouble, nil},
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Include("interp"),
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},
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"curly": {
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{`\}`, LiteralStringInterpol, Pop(1)},
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{`:-`, Keyword, nil},
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{`\w+`, NameVariable, nil},
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{"[^}:\"\\'`$\\\\]+", Punctuation, nil},
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{`:`, Punctuation, nil},
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Include("root"),
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},
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"paren": {
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{`\)`, Keyword, Pop(1)},
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Include("root"),
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},
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"math": {
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{`\)\)`, Keyword, Pop(1)},
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{`[-+*/%^|&]|\*\*|\|\|`, Operator, nil},
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{`\d+#\d+`, LiteralNumber, nil},
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{`\d+#(?! )`, LiteralNumber, nil},
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{`\d+`, LiteralNumber, nil},
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Include("root"),
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},
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"backticks": {
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{"`", LiteralStringBacktick, Pop(1)},
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Include("root"),
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},
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},
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).SetAnalyser(func(text string) float32 {
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if bashAnalyserRe.FindString(text) != "" {
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return 1.0
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}
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return 0.0
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}))
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