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node_modules/@yarnpkg/parsers/lib/grammars/resolution.d.ts

@@ -0,0 +1 @@
+export declare const parse: (code: string) => Object;

node_modules/@yarnpkg/parsers/lib/grammars/resolution.js

@@ -0,0 +1,530 @@
+/*
+ * Generated by PEG.js 0.10.0.
+ *
+ * http://pegjs.org/
+ */
+
+"use strict";
+
+function peg$subclass(child, parent) {
+  function ctor() { this.constructor = child; }
+  ctor.prototype = parent.prototype;
+  child.prototype = new ctor();
+}
+
+function peg$SyntaxError(message, expected, found, location) {
+  this.message  = message;
+  this.expected = expected;
+  this.found    = found;
+  this.location = location;
+  this.name     = "SyntaxError";
+
+  if (typeof Error.captureStackTrace === "function") {
+    Error.captureStackTrace(this, peg$SyntaxError);
+  }
+}
+
+peg$subclass(peg$SyntaxError, Error);
+
+peg$SyntaxError.buildMessage = function(expected, found) {
+  var DESCRIBE_EXPECTATION_FNS = {
+        literal: function(expectation) {
+          return "\"" + literalEscape(expectation.text) + "\"";
+        },
+
+        "class": function(expectation) {
+          var escapedParts = "",
+              i;
+
+          for (i = 0; i < expectation.parts.length; i++) {
+            escapedParts += expectation.parts[i] instanceof Array
+              ? classEscape(expectation.parts[i][0]) + "-" + classEscape(expectation.parts[i][1])
+              : classEscape(expectation.parts[i]);
+          }
+
+          return "[" + (expectation.inverted ? "^" : "") + escapedParts + "]";
+        },
+
+        any: function(expectation) {
+          return "any character";
+        },
+
+        end: function(expectation) {
+          return "end of input";
+        },
+
+        other: function(expectation) {
+          return expectation.description;
+        }
+      };
+
+  function hex(ch) {
+    return ch.charCodeAt(0).toString(16).toUpperCase();
+  }
+
+  function literalEscape(s) {
+    return s
+      .replace(/\\/g, '\\\\')
+      .replace(/"/g,  '\\"')
+      .replace(/\0/g, '\\0')
+      .replace(/\t/g, '\\t')
+      .replace(/\n/g, '\\n')
+      .replace(/\r/g, '\\r')
+      .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
+      .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return '\\x'  + hex(ch); });
+  }
+
+  function classEscape(s) {
+    return s
+      .replace(/\\/g, '\\\\')
+      .replace(/\]/g, '\\]')
+      .replace(/\^/g, '\\^')
+      .replace(/-/g,  '\\-')
+      .replace(/\0/g, '\\0')
+      .replace(/\t/g, '\\t')
+      .replace(/\n/g, '\\n')
+      .replace(/\r/g, '\\r')
+      .replace(/[\x00-\x0F]/g,          function(ch) { return '\\x0' + hex(ch); })
+      .replace(/[\x10-\x1F\x7F-\x9F]/g, function(ch) { return '\\x'  + hex(ch); });
+  }
+
+  function describeExpectation(expectation) {
+    return DESCRIBE_EXPECTATION_FNS[expectation.type](expectation);
+  }
+
+  function describeExpected(expected) {
+    var descriptions = new Array(expected.length),
+        i, j;
+
+    for (i = 0; i < expected.length; i++) {
+      descriptions[i] = describeExpectation(expected[i]);
+    }
+
+    descriptions.sort();
+
+    if (descriptions.length > 0) {
+      for (i = 1, j = 1; i < descriptions.length; i++) {
+        if (descriptions[i - 1] !== descriptions[i]) {
+          descriptions[j] = descriptions[i];
+          j++;
+        }
+      }
+      descriptions.length = j;
+    }
+
+    switch (descriptions.length) {
+      case 1:
+        return descriptions[0];
+
+      case 2:
+        return descriptions[0] + " or " + descriptions[1];
+
+      default:
+        return descriptions.slice(0, -1).join(", ")
+          + ", or "
+          + descriptions[descriptions.length - 1];
+    }
+  }
+
+  function describeFound(found) {
+    return found ? "\"" + literalEscape(found) + "\"" : "end of input";
+  }
+
+  return "Expected " + describeExpected(expected) + " but " + describeFound(found) + " found.";
+};
+
+function peg$parse(input, options) {
+  options = options !== void 0 ? options : {};
+
+  var peg$FAILED = {},
+
+      peg$startRuleFunctions = { resolution: peg$parseresolution },
+      peg$startRuleFunction  = peg$parseresolution,
+
+      peg$c0 = "/",
+      peg$c1 = peg$literalExpectation("/", false),
+      peg$c2 = function(from, descriptor) { return { from, descriptor } },
+      peg$c3 = function(descriptor) { return { descriptor } },
+      peg$c4 = "@",
+      peg$c5 = peg$literalExpectation("@", false),
+      peg$c6 = function(fullName, description) { return { fullName, description } },
+      peg$c7 = function(fullName) { return { fullName } },
+      peg$c8 = function() { return text() },
+      peg$c9 = /^[^\/@]/,
+      peg$c10 = peg$classExpectation(["/", "@"], true, false),
+      peg$c11 = /^[^\/]/,
+      peg$c12 = peg$classExpectation(["/"], true, false),
+
+      peg$currPos          = 0,
+      peg$savedPos         = 0,
+      peg$posDetailsCache  = [{ line: 1, column: 1 }],
+      peg$maxFailPos       = 0,
+      peg$maxFailExpected  = [],
+      peg$silentFails      = 0,
+
+      peg$result;
+
+  if ("startRule" in options) {
+    if (!(options.startRule in peg$startRuleFunctions)) {
+      throw new Error("Can't start parsing from rule \"" + options.startRule + "\".");
+    }
+
+    peg$startRuleFunction = peg$startRuleFunctions[options.startRule];
+  }
+
+  function text() {
+    return input.substring(peg$savedPos, peg$currPos);
+  }
+
+  function location() {
+    return peg$computeLocation(peg$savedPos, peg$currPos);
+  }
+
+  function expected(description, location) {
+    location = location !== void 0 ? location : peg$computeLocation(peg$savedPos, peg$currPos)
+
+    throw peg$buildStructuredError(
+      [peg$otherExpectation(description)],
+      input.substring(peg$savedPos, peg$currPos),
+      location
+    );
+  }
+
+  function error(message, location) {
+    location = location !== void 0 ? location : peg$computeLocation(peg$savedPos, peg$currPos)
+
+    throw peg$buildSimpleError(message, location);
+  }
+
+  function peg$literalExpectation(text, ignoreCase) {
+    return { type: "literal", text: text, ignoreCase: ignoreCase };
+  }
+
+  function peg$classExpectation(parts, inverted, ignoreCase) {
+    return { type: "class", parts: parts, inverted: inverted, ignoreCase: ignoreCase };
+  }
+
+  function peg$anyExpectation() {
+    return { type: "any" };
+  }
+
+  function peg$endExpectation() {
+    return { type: "end" };
+  }
+
+  function peg$otherExpectation(description) {
+    return { type: "other", description: description };
+  }
+
+  function peg$computePosDetails(pos) {
+    var details = peg$posDetailsCache[pos], p;
+
+    if (details) {
+      return details;
+    } else {
+      p = pos - 1;
+      while (!peg$posDetailsCache[p]) {
+        p--;
+      }
+
+      details = peg$posDetailsCache[p];
+      details = {
+        line:   details.line,
+        column: details.column
+      };
+
+      while (p < pos) {
+        if (input.charCodeAt(p) === 10) {
+          details.line++;
+          details.column = 1;
+        } else {
+          details.column++;
+        }
+
+        p++;
+      }
+
+      peg$posDetailsCache[pos] = details;
+      return details;
+    }
+  }
+
+  function peg$computeLocation(startPos, endPos) {
+    var startPosDetails = peg$computePosDetails(startPos),
+        endPosDetails   = peg$computePosDetails(endPos);
+
+    return {
+      start: {
+        offset: startPos,
+        line:   startPosDetails.line,
+        column: startPosDetails.column
+      },
+      end: {
+        offset: endPos,
+        line:   endPosDetails.line,
+        column: endPosDetails.column
+      }
+    };
+  }
+
+  function peg$fail(expected) {
+    if (peg$currPos < peg$maxFailPos) { return; }
+
+    if (peg$currPos > peg$maxFailPos) {
+      peg$maxFailPos = peg$currPos;
+      peg$maxFailExpected = [];
+    }
+
+    peg$maxFailExpected.push(expected);
+  }
+
+  function peg$buildSimpleError(message, location) {
+    return new peg$SyntaxError(message, null, null, location);
+  }
+
+  function peg$buildStructuredError(expected, found, location) {
+    return new peg$SyntaxError(
+      peg$SyntaxError.buildMessage(expected, found),
+      expected,
+      found,
+      location
+    );
+  }
+
+  function peg$parseresolution() {
+    var s0, s1, s2, s3;
+
+    s0 = peg$currPos;
+    s1 = peg$parsespecifier();
+    if (s1 !== peg$FAILED) {
+      if (input.charCodeAt(peg$currPos) === 47) {
+        s2 = peg$c0;
+        peg$currPos++;
+      } else {
+        s2 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c1); }
+      }
+      if (s2 !== peg$FAILED) {
+        s3 = peg$parsespecifier();
+        if (s3 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c2(s1, s3);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+    } else {
+      peg$currPos = s0;
+      s0 = peg$FAILED;
+    }
+    if (s0 === peg$FAILED) {
+      s0 = peg$currPos;
+      s1 = peg$parsespecifier();
+      if (s1 !== peg$FAILED) {
+        peg$savedPos = s0;
+        s1 = peg$c3(s1);
+      }
+      s0 = s1;
+    }
+
+    return s0;
+  }
+
+  function peg$parsespecifier() {
+    var s0, s1, s2, s3;
+
+    s0 = peg$currPos;
+    s1 = peg$parsefullName();
+    if (s1 !== peg$FAILED) {
+      if (input.charCodeAt(peg$currPos) === 64) {
+        s2 = peg$c4;
+        peg$currPos++;
+      } else {
+        s2 = peg$FAILED;
+        if (peg$silentFails === 0) { peg$fail(peg$c5); }
+      }
+      if (s2 !== peg$FAILED) {
+        s3 = peg$parsedescription();
+        if (s3 !== peg$FAILED) {
+          peg$savedPos = s0;
+          s1 = peg$c6(s1, s3);
+          s0 = s1;
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+    } else {
+      peg$currPos = s0;
+      s0 = peg$FAILED;
+    }
+    if (s0 === peg$FAILED) {
+      s0 = peg$currPos;
+      s1 = peg$parsefullName();
+      if (s1 !== peg$FAILED) {
+        peg$savedPos = s0;
+        s1 = peg$c7(s1);
+      }
+      s0 = s1;
+    }
+
+    return s0;
+  }
+
+  function peg$parsefullName() {
+    var s0, s1, s2, s3, s4;
+
+    s0 = peg$currPos;
+    if (input.charCodeAt(peg$currPos) === 64) {
+      s1 = peg$c4;
+      peg$currPos++;
+    } else {
+      s1 = peg$FAILED;
+      if (peg$silentFails === 0) { peg$fail(peg$c5); }
+    }
+    if (s1 !== peg$FAILED) {
+      s2 = peg$parseident();
+      if (s2 !== peg$FAILED) {
+        if (input.charCodeAt(peg$currPos) === 47) {
+          s3 = peg$c0;
+          peg$currPos++;
+        } else {
+          s3 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c1); }
+        }
+        if (s3 !== peg$FAILED) {
+          s4 = peg$parseident();
+          if (s4 !== peg$FAILED) {
+            peg$savedPos = s0;
+            s1 = peg$c8();
+            s0 = s1;
+          } else {
+            peg$currPos = s0;
+            s0 = peg$FAILED;
+          }
+        } else {
+          peg$currPos = s0;
+          s0 = peg$FAILED;
+        }
+      } else {
+        peg$currPos = s0;
+        s0 = peg$FAILED;
+      }
+    } else {
+      peg$currPos = s0;
+      s0 = peg$FAILED;
+    }
+    if (s0 === peg$FAILED) {
+      s0 = peg$currPos;
+      s1 = peg$parseident();
+      if (s1 !== peg$FAILED) {
+        peg$savedPos = s0;
+        s1 = peg$c8();
+      }
+      s0 = s1;
+    }
+
+    return s0;
+  }
+
+  function peg$parseident() {
+    var s0, s1, s2;
+
+    s0 = peg$currPos;
+    s1 = [];
+    if (peg$c9.test(input.charAt(peg$currPos))) {
+      s2 = input.charAt(peg$currPos);
+      peg$currPos++;
+    } else {
+      s2 = peg$FAILED;
+      if (peg$silentFails === 0) { peg$fail(peg$c10); }
+    }
+    if (s2 !== peg$FAILED) {
+      while (s2 !== peg$FAILED) {
+        s1.push(s2);
+        if (peg$c9.test(input.charAt(peg$currPos))) {
+          s2 = input.charAt(peg$currPos);
+          peg$currPos++;
+        } else {
+          s2 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c10); }
+        }
+      }
+    } else {
+      s1 = peg$FAILED;
+    }
+    if (s1 !== peg$FAILED) {
+      peg$savedPos = s0;
+      s1 = peg$c8();
+    }
+    s0 = s1;
+
+    return s0;
+  }
+
+  function peg$parsedescription() {
+    var s0, s1, s2;
+
+    s0 = peg$currPos;
+    s1 = [];
+    if (peg$c11.test(input.charAt(peg$currPos))) {
+      s2 = input.charAt(peg$currPos);
+      peg$currPos++;
+    } else {
+      s2 = peg$FAILED;
+      if (peg$silentFails === 0) { peg$fail(peg$c12); }
+    }
+    if (s2 !== peg$FAILED) {
+      while (s2 !== peg$FAILED) {
+        s1.push(s2);
+        if (peg$c11.test(input.charAt(peg$currPos))) {
+          s2 = input.charAt(peg$currPos);
+          peg$currPos++;
+        } else {
+          s2 = peg$FAILED;
+          if (peg$silentFails === 0) { peg$fail(peg$c12); }
+        }
+      }
+    } else {
+      s1 = peg$FAILED;
+    }
+    if (s1 !== peg$FAILED) {
+      peg$savedPos = s0;
+      s1 = peg$c8();
+    }
+    s0 = s1;
+
+    return s0;
+  }
+
+  peg$result = peg$startRuleFunction();
+
+  if (peg$result !== peg$FAILED && peg$currPos === input.length) {
+    return peg$result;
+  } else {
+    if (peg$result !== peg$FAILED && peg$currPos < input.length) {
+      peg$fail(peg$endExpectation());
+    }
+
+    throw peg$buildStructuredError(
+      peg$maxFailExpected,
+      peg$maxFailPos < input.length ? input.charAt(peg$maxFailPos) : null,
+      peg$maxFailPos < input.length
+        ? peg$computeLocation(peg$maxFailPos, peg$maxFailPos + 1)
+        : peg$computeLocation(peg$maxFailPos, peg$maxFailPos)
+    );
+  }
+}
+
+module.exports = {
+  SyntaxError: peg$SyntaxError,
+  parse:       peg$parse
+};

node_modules/@yarnpkg/parsers/lib/grammars/resolution.pegjs

@@ -0,0 +1,17 @@
+resolution =
+  from:specifier "/" descriptor:specifier { return { from, descriptor } }
+/ descriptor:specifier { return { descriptor } }
+
+specifier =
+  fullName:fullName "@" description:description { return { fullName, description } }
+/ fullName:fullName { return { fullName } }
+
+fullName =
+  "@" ident "/" ident { return text() }
+/ ident { return text() }
+
+ident =
+  [^/@]+ { return text() }
+
+description =
+  [^/]+ { return text() }

node_modules/@yarnpkg/parsers/lib/grammars/shell.d.ts

@@ -0,0 +1,92 @@
+// From the top to the bottom:
+//
+// - A shell line is composed of multiple command lines, first separated by ";" and then chained by "&&" / "||"
+// - A command line is composed of multiple commands chained by "|" / "|&"
+// - A command is composed of multiple arguments separated by spaces
+// - An argument can be a value argument (sent to the underlying program), or a redirection
+// - A value argument is a combination of argument segments
+
+export type ArgumentSegment =
+  | {type: `text`, text: string}
+  | {type: `glob`, pattern: string}
+  | {type: `shell`, shell: ShellLine, quoted: boolean}
+  | {type: `variable`, name: string, defaultValue?: Array<ValueArgument>, alternativeValue?: Array<ValueArgument>, quoted: boolean}
+  | {type: `arithmetic`, arithmetic: ArithmeticExpression};
+
+export type Argument =
+  | RedirectArgument
+  | ValueArgument;
+
+export type RedirectArgument = {
+  type: `redirection`;
+  subtype: `>` | `<` | '>&' | '<&' | `>>` | `<<<`;
+  fd: number | null;
+  args: Array<ValueArgument>;
+};
+
+export type ValueArgument =
+  | {type: `argument`, segments: Array<ArgumentSegment>};
+
+export type EnvSegment = {
+  name: string;
+  args: [] | [ValueArgument];
+};
+
+export type Command = {
+  type: `command`;
+  args: Array<Argument>;
+  envs: Array<EnvSegment>;
+} | {
+  type: `subshell`;
+  subshell: ShellLine;
+  args: Array<RedirectArgument>;
+} | {
+  type: `group`;
+  group: ShellLine;
+  args: Array<RedirectArgument>;
+} | {
+  type: `envs`;
+  envs: Array<EnvSegment>;
+};
+
+export type CommandChain = Command & {
+  then?: CommandChainThen;
+};
+
+export type CommandChainThen = {
+  type: `|&` | `|`;
+  chain: CommandChain;
+};
+
+export type CommandLine = {
+  chain: CommandChain;
+  then?: CommandLineThen;
+};
+
+export type CommandLineThen = {
+  type: `&&` | `||`;
+  line: CommandLine;
+};
+
+export type ShellLine = Array<{
+  type: ';' | '&';
+  command: CommandLine;
+}>;
+
+export type ArithmeticPrimary = {
+  type: `number`;
+  value: number;
+} | {
+  type: `variable`;
+  name: string;
+};
+
+export type ArithmeticOperatorExpression = {
+  type: `multiplication` | `division` | `addition` | `subtraction`;
+  left: ArithmeticExpression;
+  right: ArithmeticExpression;
+};
+
+export type ArithmeticExpression = ArithmeticPrimary | ArithmeticOperatorExpression;
+
+export declare const parse: (code: string, options: {isGlobPattern: (arg: string) => boolean}) => ShellLine;

node_modules/@yarnpkg/parsers/lib/grammars/shell.pegjs

@@ -0,0 +1,189 @@
+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]+

node_modules/@yarnpkg/parsers/lib/grammars/syml.d.ts

@@ -0,0 +1 @@
+export declare const parse: (code: string) => {[key: string]: any};

node_modules/@yarnpkg/parsers/lib/grammars/syml.pegjs

@@ -0,0 +1,125 @@
+{
+  const INDENT_STEP = 2;
+
+  let indentLevel = 0;
+}
+
+Start
+  = PropertyStatements
+
+ItemStatements
+  = statements:ItemStatement* { return [].concat(... statements) }
+
+ItemStatement
+  = Samedent "-" B value:Expression { return value }
+
+PropertyStatements
+  = statements:PropertyStatement* { return Object.assign({}, ... statements) }
+
+PropertyStatement
+  = B? ("#" (!EOL .)+)? EOL_ANY+ { return {} }
+  / Samedent property:Name B? ":" B? value:Expression { return {[property]: value} }
+  // Compatibility with the old lockfile format (key-values without a ":")
+  / Samedent property:LegacyName B? ":" B? value:Expression { return {[property]: value} }
+  // Compatibility with the old lockfile format (key-values without a ":")
+  / Samedent property:LegacyName B value:LegacyLiteral EOL_ANY+ { return {[property]: value} }
+  // Compatibility with the old lockfile format (multiple keys for a same value)
+  / Samedent property:LegacyName others:(B? "," B? other:LegacyName { return other })+ B? ":" B? value:Expression { return Object.assign({}, ... [property].concat(others).map(property => ({[property]: value}))) }
+
+Expression
+  =  &(EOL Extradent "-" B) EOL_ANY Indent statements:ItemStatements Dedent { return statements }
+  / EOL Indent statements:PropertyStatements Dedent { return statements }
+  / expression:Literal EOL_ANY+ { return expression }
+
+Samedent "correct indentation"
+  = spaces:" "* &{ return spaces.length === indentLevel * INDENT_STEP }
+
+Extradent
+  = spaces:" "* &{ return spaces.length === (indentLevel + 1) * INDENT_STEP }
+
+Indent
+  = &{ indentLevel++; return true }
+
+Dedent
+  = &{ indentLevel--; return true }
+
+Name
+  = string
+  / pseudostring
+
+LegacyName
+  = string
+  / pseudostringLegacy+ { return text() }
+
+Literal
+  = null
+  / boolean
+  / string
+  / pseudostring
+
+LegacyLiteral
+  = null
+  / string
+  / pseudostringLegacy
+
+/**
+ */
+
+pseudostring "pseudostring"
+  = [^\r\n\t ?:,\][{}#&*!|>'"%@`-] (B? [^\r\n\t ,\][{}:#"'])* { return text().replace(/^ *| *$/g, '') }
+
+pseudostringLegacy
+  = "--"? [a-zA-Z\/0-9] [^\r\n\t :,]* { return text().replace(/^ *| *$/g, '') }
+
+/**
+ * String parsing
+ */
+
+null
+  = "null" { return null }
+
+boolean
+  = "true" { return true }
+  / "false" { return false }
+
+string "string"
+  = '"' '"' { return "" }
+  / '"' chars:chars '"' { return chars }
+
+chars
+  = chars:char+ { return chars.join(``) }
+
+char
+  = [^"\\\0-\x1F\x7f]
+  / '\\"' { return `"` }
+  / "\\\\" { return `\\` }
+  / "\\/" { return `/`  }
+  / "\\b" { return `\b` }
+  / "\\f" { return `\f` }
+  / "\\n" { return `\n` }
+  / "\\r" { return `\r` }
+  / "\\t" { return `\t` }
+  / "\\u" h1:hexDigit h2:hexDigit h3:hexDigit h4:hexDigit {
+      return String.fromCharCode(parseInt(`0x${h1}${h2}${h3}${h4}`));
+    }
+
+hexDigit
+  = [0-9a-fA-F]
+
+/**
+ * Spaces
+ */
+
+B "blank space"
+  = [ \t]+
+
+S "white space"
+  = [ \t\n\r]+
+
+EOL_ANY
+  = EOL (B? EOL)*
+
+EOL
+  = "\r\n"
+  / "\n"
+  / "\r"