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| Current File : //proc/self/root/home/saurabh/.npm/_npx/249ca9fcd30c476a/node_modules/getenv/index.js |
const util = require('util');
const url = require('url');
let fallbacksDisabled = false;
let throwError = true;
function _value(varName, fallback) {
const value = process.env[varName];
if (value === undefined) {
if (fallback === undefined && !throwError) {
return value;
}
if (fallback === undefined) {
throw new Error(
'GetEnv.Nonexistent: ' + varName + ' does not exist ' + 'and no fallback value provided.'
);
}
if (fallbacksDisabled) {
throw new Error(
'GetEnv.DisabledFallbacks: ' +
varName +
' relying on fallback ' +
'when fallbacks have been disabled'
);
}
return '' + fallback;
}
return value;
}
const convert = {
string: function(value) {
return '' + value;
},
int: function(value) {
const isInt = value.match(/^-?\d+$/);
if (!isInt) {
throw new Error('GetEnv.NoInteger: ' + value + ' is not an integer.');
}
return +value;
},
float: function(value) {
const isInfinity = +value === Infinity || +value === -Infinity;
if (isInfinity) {
throw new Error('GetEnv.Infinity: ' + value + ' is set to +/-Infinity.');
}
const isFloat = !(isNaN(value) || value === '');
if (!isFloat) {
throw new Error('GetEnv.NoFloat: ' + value + ' is not a number.');
}
return +value;
},
bool: function(value) {
const isBool = value === 'true' || value === 'false';
if (!isBool) {
throw new Error('GetEnv.NoBoolean: ' + value + ' is not a boolean.');
}
return value === 'true';
},
boolish: function(value) {
try {
return convert.bool(value);
} catch (err) {
const isBool = value === '1' || value === '0';
if (!isBool) {
throw new Error('GetEnv.NoBoolean: ' + value + ' is not a boolean.');
}
return value === '1';
}
},
url: url.parse,
};
function converter(type) {
return function(varName, fallback) {
if (typeof varName == 'string') {
// default
const value = _value(varName, fallback);
return convert[type](value);
} else {
// multibert!
return getenv.multi(varName);
}
};
}
const getenv = converter('string');
Object.keys(convert).forEach(function(type) {
getenv[type] = converter(type);
});
getenv.array = function array(varName, type, fallback) {
type = type || 'string';
if (Object.keys(convert).indexOf(type) === -1) {
throw new Error('GetEnv.ArrayUndefinedType: Unknown array type ' + type);
}
const value = _value(varName, fallback);
return value.split(/\s*,\s*/).map(convert[type]);
};
getenv.multi = function multi(spec) {
const result = {};
for (let key in spec) {
const value = spec[key];
if (util.isArray(value)) {
// default value & typecast
switch (value.length) {
case 1: // no default value
case 2: // no type casting
result[key] = getenv(value[0], value[1]); // dirty, when case 1: value[1] is undefined
break;
case 3: // with typecast
result[key] = getenv[value[2]](value[0], value[1]);
break;
default:
// wtf?
throw 'getenv.multi(): invalid spec';
break;
}
} else {
// value or throw
result[key] = getenv(value);
}
}
return result;
};
getenv.disableFallbacks = function() {
fallbacksDisabled = true;
};
getenv.enableFallbacks = function() {
fallbacksDisabled = false;
};
getenv.disableErrors = function() {
throwError = false;
};
getenv.enableErrors = function() {
throwError = true;
};
module.exports = getenv;
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