tools: move eslint from tools to tools/node_modules

This is required because we need to add the babel-eslint dependency
and it has to be able to resolve "eslint".
babel-eslint is required to support future ES features such as async
iterators and import.meta.

Refs: https://github.com/nodejs/node/pull/17755
PR-URL: https://github.com/nodejs/node/pull/17820
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 285 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/levn/lib/coerce.js b/tools/node_modules/eslint/node_modules/levn/lib/coerce.js
new file mode 100644
index 0000000000..027b6da022
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/levn/lib/coerce.js
@@ -0,0 +1,285 @@
+// Generated by LiveScript 1.2.0
+(function(){
+  var parsedTypeCheck, types, toString$ = {}.toString;
+  parsedTypeCheck = require('type-check').parsedTypeCheck;
+  types = {
+    '*': function(it){
+      switch (toString$.call(it).slice(8, -1)) {
+      case 'Array':
+        return coerceType(it, {
+          type: 'Array'
+        });
+      case 'Object':
+        return coerceType(it, {
+          type: 'Object'
+        });
+      default:
+        return {
+          type: 'Just',
+          value: coerceTypes(it, [
+            {
+              type: 'Undefined'
+            }, {
+              type: 'Null'
+            }, {
+              type: 'NaN'
+            }, {
+              type: 'Boolean'
+            }, {
+              type: 'Number'
+            }, {
+              type: 'Date'
+            }, {
+              type: 'RegExp'
+            }, {
+              type: 'Array'
+            }, {
+              type: 'Object'
+            }, {
+              type: 'String'
+            }
+          ], {
+            explicit: true
+          })
+        };
+      }
+    },
+    Undefined: function(it){
+      if (it === 'undefined' || it === void 8) {
+        return {
+          type: 'Just',
+          value: void 8
+        };
+      } else {
+        return {
+          type: 'Nothing'
+        };
+      }
+    },
+    Null: function(it){
+      if (it === 'null') {
+        return {
+          type: 'Just',
+          value: null
+        };
+      } else {
+        return {
+          type: 'Nothing'
+        };
+      }
+    },
+    NaN: function(it){
+      if (it === 'NaN') {
+        return {
+          type: 'Just',
+          value: NaN
+        };
+      } else {
+        return {
+          type: 'Nothing'
+        };
+      }
+    },
+    Boolean: function(it){
+      if (it === 'true') {
+        return {
+          type: 'Just',
+          value: true
+        };
+      } else if (it === 'false') {
+        return {
+          type: 'Just',
+          value: false
+        };
+      } else {
+        return {
+          type: 'Nothing'
+        };
+      }
+    },
+    Number: function(it){
+      return {
+        type: 'Just',
+        value: +it
+      };
+    },
+    Int: function(it){
+      return {
+        type: 'Just',
+        value: parseInt(it)
+      };
+    },
+    Float: function(it){
+      return {
+        type: 'Just',
+        value: parseFloat(it)
+      };
+    },
+    Date: function(value, options){
+      var that;
+      if (that = /^\#(.*)\#$/.exec(value)) {
+        return {
+          type: 'Just',
+          value: new Date(+that[1] || that[1])
+        };
+      } else if (options.explicit) {
+        return {
+          type: 'Nothing'
+        };
+      } else {
+        return {
+          type: 'Just',
+          value: new Date(+value || value)
+        };
+      }
+    },
+    RegExp: function(value, options){
+      var that;
+      if (that = /^\/(.*)\/([gimy]*)$/.exec(value)) {
+        return {
+          type: 'Just',
+          value: new RegExp(that[1], that[2])
+        };
+      } else if (options.explicit) {
+        return {
+          type: 'Nothing'
+        };
+      } else {
+        return {
+          type: 'Just',
+          value: new RegExp(value)
+        };
+      }
+    },
+    Array: function(it){
+      return coerceArray(it, {
+        of: [{
+          type: '*'
+        }]
+      });
+    },
+    Object: function(it){
+      return coerceFields(it, {
+        of: {}
+      });
+    },
+    String: function(it){
+      var that;
+      if (toString$.call(it).slice(8, -1) !== 'String') {
+        return {
+          type: 'Nothing'
+        };
+      }
+      if (that = it.match(/^'(.*)'$/)) {
+        return {
+          type: 'Just',
+          value: that[1]
+        };
+      } else if (that = it.match(/^"(.*)"$/)) {
+        return {
+          type: 'Just',
+          value: that[1]
+        };
+      } else {
+        return {
+          type: 'Just',
+          value: it
+        };
+      }
+    }
+  };
+  function coerceArray(node, type){
+    var typeOf, element;
+    if (toString$.call(node).slice(8, -1) !== 'Array') {
+      return {
+        type: 'Nothing'
+      };
+    }
+    typeOf = type.of;
+    return {
+      type: 'Just',
+      value: (function(){
+        var i$, ref$, len$, results$ = [];
+        for (i$ = 0, len$ = (ref$ = node).length; i$ < len$; ++i$) {
+          element = ref$[i$];
+          results$.push(coerceTypes(element, typeOf));
+        }
+        return results$;
+      }())
+    };
+  }
+  function coerceTuple(node, type){
+    var result, i$, ref$, len$, i, types, that;
+    if (toString$.call(node).slice(8, -1) !== 'Array') {
+      return {
+        type: 'Nothing'
+      };
+    }
+    result = [];
+    for (i$ = 0, len$ = (ref$ = type.of).length; i$ < len$; ++i$) {
+      i = i$;
+      types = ref$[i$];
+      if (that = coerceTypes(node[i], types)) {
+        result.push(that);
+      }
+    }
+    return {
+      type: 'Just',
+      value: result
+    };
+  }
+  function coerceFields(node, type){
+    var typeOf, key, value;
+    if (toString$.call(node).slice(8, -1) !== 'Object') {
+      return {
+        type: 'Nothing'
+      };
+    }
+    typeOf = type.of;
+    return {
+      type: 'Just',
+      value: (function(){
+        var ref$, results$ = {};
+        for (key in ref$ = node) {
+          value = ref$[key];
+          results$[key] = coerceTypes(value, typeOf[key] || [{
+            type: '*'
+          }]);
+        }
+        return results$;
+      }())
+    };
+  }
+  function coerceType(node, typeObj, options){
+    var type, structure, coerceFunc;
+    type = typeObj.type, structure = typeObj.structure;
+    if (type) {
+      coerceFunc = types[type];
+      return coerceFunc(node, options);
+    } else {
+      switch (structure) {
+      case 'array':
+        return coerceArray(node, typeObj);
+      case 'tuple':
+        return coerceTuple(node, typeObj);
+      case 'fields':
+        return coerceFields(node, typeObj);
+      }
+    }
+  }
+  function coerceTypes(node, types, options){
+    var i$, len$, type, ref$, valueType, value;
+    for (i$ = 0, len$ = types.length; i$ < len$; ++i$) {
+      type = types[i$];
+      ref$ = coerceType(node, type, options), valueType = ref$.type, value = ref$.value;
+      if (valueType === 'Nothing') {
+        continue;
+      }
+      if (parsedTypeCheck([type], value)) {
+        return value;
+      }
+    }
+    throw new Error("Value " + JSON.stringify(node) + " does not type check against " + JSON.stringify(types) + ".");
+  }
+  module.exports = coerceTypes;
+}).call(this);