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|
Start
= S* line:ShellLine? { return line ? line : [] }
ShellLine
= command:CommandLine S* type:ShellLineType then:ShellLineThen? { return [ { command, type } ].concat(then || []) }
/ command:CommandLine S* type:ShellLineType? { return [ { command, type: type || ';' } ] }
ShellLineThen
= S* then:ShellLine S* { return then }
ShellLineType
= ';'
/ '&'
CommandLine
= chain:CommandChain then:CommandLineThen? { return then ? { chain, then } : { chain } }
CommandLineThen
= S* type:CommandLineType S* then:CommandLine S* { return { type, line: then } }
CommandLineType
= '&&'
/ '||'
CommandChain
= main:Command then:CommandChainThen? { return then ? { ...main, then } : main }
CommandChainThen
= S* type:CommandChainType S* then:CommandChain S* { return { type, chain: then } }
CommandChainType
= '|&'
/ '|'
VariableAssignment
= name:EnvVariable '=' arg:StrictValueArgument S* { return { name, args: [arg] } }
/ name:EnvVariable '=' S* { return { name, args: [] } }
Command
= S* "(" S* subshell:ShellLine S* ")" S* args:RedirectArgument* S* { return { type: `subshell`, subshell, args } }
/ S* "{" S* group:ShellLine S* "}" S* args:RedirectArgument* S* { return { type: `group`, group, args } }
/ S* envs:VariableAssignment* S* args:Argument+ S* { return { type: `command`, args, envs } }
/ S* envs:VariableAssignment+ S* { return { type: `envs`, envs } }
CommandString
= S* args:ValueArgument+ S* { return args }
Argument
= S* arg:RedirectArgument { return arg }
/ S* arg:ValueArgument { return arg }
RedirectArgument
= S* fd:[0-9]? redirect:RedirectType arg:ValueArgument { return { type: `redirection`, subtype: redirect, fd: fd !== null ? parseInt(fd) : null, args: [arg] } }
RedirectType
= '>>'
/ '>&'
/ '>'
/ '<<<'
/ '<&'
/ '<'
ValueArgument
= S* arg:StrictValueArgument { return arg }
StrictValueArgument
= segments:ArgumentSegment+ { return { type: `argument`, segments: [].concat(... segments) } }
ArgumentSegment
= string:CQuoteString { return string }
/ string:SglQuoteString { return string }
/ string:DblQuoteString { return string }
/ string:PlainString { return string }
CQuoteString
= "$'" text:CQuoteStringText "'" { return [ { type: `text`, text } ] }
SglQuoteString
= "'" text:SglQuoteStringText "'" { return [ { type: `text`, text } ] }
DblQuoteString
= '""' { return { type: `text`, text: `` } } / '"' segments:DblQuoteStringSegment* '"' { return segments }
PlainString
= segments:PlainStringSegment+ { return segments }
DblQuoteStringSegment
= arithmetic:Arithmetic { return { type: `arithmetic`, arithmetic, quoted: true} }
/ shell:Subshell { return { type: `shell`, shell, quoted: true } }
/ variable:Variable { return { type: `variable`, ...variable, quoted: true } }
/ text:DblQuoteStringText { return { type: `text`, text } }
PlainStringSegment
= arithmetic:Arithmetic { return { type: `arithmetic`, arithmetic, quoted: false} }
/ shell:Subshell { return { type: `shell`, shell, quoted: false } }
/ variable:Variable { return { type: `variable`, ...variable, quoted: false } }
/ pattern:Glob { return { type: `glob`, pattern } }
/ text:PlainStringText { return { type: `text`, text } }
SglQuoteStringText
= chars:[^']* { return chars.join(``) }
DblQuoteStringText
= chars:( DblQuoteEscapedChar / [^$"])+ { return chars.join(``) }
DblQuoteEscapedChar
= '\\\n' { return `` }
/ '\\' c:[\\$"`] { return c }
CQuoteStringText
= chars:(CQuoteEscapedChar / [^'])* { return chars.join(``) }
CQuoteEscapedChar
= '\\a' { return '\a' }
/ '\\b' { return '\b' }
/ '\\' [Ee] { return '\x1b' }
/ '\\f' { return '\f' }
/ '\\n' { return '\n' }
/ '\\r' { return '\r' }
/ '\\t' { return '\t' }
/ '\\v' { return '\v' }
/ '\\' c:[\\'"?] { return c }
/ HexCodeString
HexCodeString
= '\\' c:HexCodeChar0 { return String.fromCharCode(parseInt(c, 16)) }
/ char:('\\x' c:$(HexCodeChar0 HexCodeChar / HexCodeChar0) { return String.fromCharCode(parseInt(c, 16)) })
/ utf8:('\\u' c:$(HexCodeChar HexCodeChar HexCodeChar HexCodeChar) { return String.fromCharCode(parseInt(c, 16)) })
/ utf16:('\\U' c:$(HexCodeChar HexCodeChar HexCodeChar HexCodeChar HexCodeChar HexCodeChar HexCodeChar HexCodeChar) { return String.fromCodePoint(parseInt(c, 16)) })
HexCodeChar0
= [0-7]
HexCodeChar
= [0-9a-fA-f]
PlainStringText
= chars:('\\' c:. { return c } / '{}' { return '{}' } / !SpecialShellChars c:. { return c })+ { return chars.join(``) }
ArithmeticPrimary
= sign:('-' / '+')? left:[0-9]+ '.' right:[0-9]+ { return { type: `number`, value: (sign === '-' ? -1 : 1) * parseFloat(left.join(``) + `.` + right.join(``)) } }
/ sign:('-' / '+')? value:[0-9]+ { return { type: `number`, value: (sign === '-' ? -1 : 1) * parseInt(value.join(``)) } }
/ variable:Variable { return { type: `variable`, ...variable } }
/ name:Identifier { return { type: `variable`, name } }
/ '(' S* value:ArithmeticExpression S* ')' { return value }
ArithmeticTimesExpression
= left:ArithmeticPrimary rest:(S* op:('*' / '/') S* right:ArithmeticPrimary { return { type: op === `*` ? `multiplication` : `division`, right } })* {
return rest.reduce((left, right) => ({ left, ...right }), left)
}
ArithmeticExpression
= left:ArithmeticTimesExpression rest:(S* op:('+' / '-') S* right:ArithmeticTimesExpression { return { type: op === `+` ? `addition` : `subtraction`, right } })* {
return rest.reduce((left, right) => ({ left, ...right }), left)
}
Arithmetic
= '$((' S* arithmetic:ArithmeticExpression S* '))' { return arithmetic }
Subshell
= '$(' command:ShellLine ')' { return command }
Variable
= '${' name:Identifier ':-' arg:CommandString '}' { return { name, defaultValue: arg } }
/ '${' name:Identifier ':-}' { return { name, defaultValue: [] } }
/ '${' name:Identifier ':+' arg:CommandString '}' { return { name, alternativeValue: arg } }
/ '${' name:Identifier ':+}' { return { name, alternativeValue: [] } }
/ '${' name:Identifier '}' { return { name } }
/ '$' name:Identifier { return { name } }
Glob
= pattern:GlobText & { return options.isGlobPattern(pattern) } { return pattern }
GlobText
= chars:(!GlobSpecialShellChars c:. { return c })+ { return chars.join(``) }
EnvVariable
= [a-zA-Z0-9_]+ { return text() }
Identifier
= [$@*?#a-zA-Z0-9_-]+ { return text() }
SpecialShellChars
= [()}<>$|&; \t"']
GlobSpecialShellChars
= [<>&; \t"']
S = [ \t]+
|
