node_modules/path-browserify/index.js - nifi-fds - Git at Google

 // .dirname, .basename, and .extname methods are extracted from Node.js v8.11.1,
 // backported and transplited with Babel, with backwards-compat fixes

 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
 // copy of this software and associated documentation files (the
 // "Software"), to deal in the Software without restriction, including
 // without limitation the rights to use, copy, modify, merge, publish,
 // distribute, sublicense, and/or sell copies of the Software, and to permit
 // persons to whom the Software is furnished to do so, subject to the
 // following conditions:
 //
 // The above copyright notice and this permission notice shall be included
 // in all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 // USE OR OTHER DEALINGS IN THE SOFTWARE.

 // resolves . and .. elements in a path array with directory names there
 // must be no slashes, empty elements, or device names (c:\) in the array
 // (so also no leading and trailing slashes - it does not distinguish
 // relative and absolute paths)
 function normalizeArray(parts, allowAboveRoot) {
   // if the path tries to go above the root, `up` ends up > 0
   var up = 0;
   for (var i = parts.length - 1; i >= 0; i--) {
     var last = parts[i];
     if (last === '.') {
       parts.splice(i, 1);
     } else if (last === '..') {
       parts.splice(i, 1);
       up++;
     } else if (up) {
       parts.splice(i, 1);
       up--;
     }
   }

   // if the path is allowed to go above the root, restore leading ..s
   if (allowAboveRoot) {
     for (; up--; up) {
       parts.unshift('..');
     }
   }

   return parts;
 }

 // path.resolve([from ...], to)
 // posix version
 exports.resolve = function() {
   var resolvedPath = '',
       resolvedAbsolute = false;

   for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
     var path = (i >= 0) ? arguments[i] : process.cwd();

     // Skip empty and invalid entries
     if (typeof path !== 'string') {
       throw new TypeError('Arguments to path.resolve must be strings');
     } else if (!path) {
       continue;
     }

     resolvedPath = path + '/' + resolvedPath;
     resolvedAbsolute = path.charAt(0) === '/';
   }

   // At this point the path should be resolved to a full absolute path, but
   // handle relative paths to be safe (might happen when process.cwd() fails)

   // Normalize the path
   resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
     return !!p;
   }), !resolvedAbsolute).join('/');

   return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
 };

 // path.normalize(path)
 // posix version
 exports.normalize = function(path) {
   var isAbsolute = exports.isAbsolute(path),
       trailingSlash = substr(path, -1) === '/';

   // Normalize the path
   path = normalizeArray(filter(path.split('/'), function(p) {
     return !!p;
   }), !isAbsolute).join('/');

   if (!path && !isAbsolute) {
     path = '.';
   }
   if (path && trailingSlash) {
     path += '/';
   }

   return (isAbsolute ? '/' : '') + path;
 };

 // posix version
 exports.isAbsolute = function(path) {
   return path.charAt(0) === '/';
 };

 // posix version
 exports.join = function() {
   var paths = Array.prototype.slice.call(arguments, 0);
   return exports.normalize(filter(paths, function(p, index) {
     if (typeof p !== 'string') {
       throw new TypeError('Arguments to path.join must be strings');
     }
     return p;
   }).join('/'));
 };


 // path.relative(from, to)
 // posix version
 exports.relative = function(from, to) {
   from = exports.resolve(from).substr(1);
   to = exports.resolve(to).substr(1);

   function trim(arr) {
     var start = 0;
     for (; start < arr.length; start++) {
       if (arr[start] !== '') break;
     }

     var end = arr.length - 1;
     for (; end >= 0; end--) {
       if (arr[end] !== '') break;
     }

     if (start > end) return [];
     return arr.slice(start, end - start + 1);
   }

   var fromParts = trim(from.split('/'));
   var toParts = trim(to.split('/'));

   var length = Math.min(fromParts.length, toParts.length);
   var samePartsLength = length;
   for (var i = 0; i < length; i++) {
     if (fromParts[i] !== toParts[i]) {
       samePartsLength = i;
       break;
     }
   }

   var outputParts = [];
   for (var i = samePartsLength; i < fromParts.length; i++) {
     outputParts.push('..');
   }

   outputParts = outputParts.concat(toParts.slice(samePartsLength));

   return outputParts.join('/');
 };

 exports.sep = '/';
 exports.delimiter = ':';

 exports.dirname = function (path) {
   if (typeof path !== 'string') path = path + '';
   if (path.length === 0) return '.';
   var code = path.charCodeAt(0);
   var hasRoot = code === 47 /*/*/;
   var end = -1;
   var matchedSlash = true;
   for (var i = path.length - 1; i >= 1; --i) {
     code = path.charCodeAt(i);
     if (code === 47 /*/*/) {
         if (!matchedSlash) {
           end = i;
           break;
         }
       } else {
       // We saw the first non-path separator
       matchedSlash = false;
     }
   }

   if (end === -1) return hasRoot ? '/' : '.';
   if (hasRoot && end === 1) {
     // return '//';
     // Backwards-compat fix:
     return '/';
   }
   return path.slice(0, end);
 };

 function basename(path) {
   if (typeof path !== 'string') path = path + '';

   var start = 0;
   var end = -1;
   var matchedSlash = true;
   var i;

   for (i = path.length - 1; i >= 0; --i) {
     if (path.charCodeAt(i) === 47 /*/*/) {
         // If we reached a path separator that was not part of a set of path
         // separators at the end of the string, stop now
         if (!matchedSlash) {
           start = i + 1;
           break;
         }
       } else if (end === -1) {
       // We saw the first non-path separator, mark this as the end of our
       // path component
       matchedSlash = false;
       end = i + 1;
     }
   }

   if (end === -1) return '';
   return path.slice(start, end);
 }

 // Uses a mixed approach for backwards-compatibility, as ext behavior changed
 // in new Node.js versions, so only basename() above is backported here
 exports.basename = function (path, ext) {
   var f = basename(path);
   if (ext && f.substr(-1 * ext.length) === ext) {
     f = f.substr(0, f.length - ext.length);
   }
   return f;
 };

 exports.extname = function (path) {
   if (typeof path !== 'string') path = path + '';
   var startDot = -1;
   var startPart = 0;
   var end = -1;
   var matchedSlash = true;
   // Track the state of characters (if any) we see before our first dot and
   // after any path separator we find
   var preDotState = 0;
   for (var i = path.length - 1; i >= 0; --i) {
     var code = path.charCodeAt(i);
     if (code === 47 /*/*/) {
         // If we reached a path separator that was not part of a set of path
         // separators at the end of the string, stop now
         if (!matchedSlash) {
           startPart = i + 1;
           break;
         }
         continue;
       }
     if (end === -1) {
       // We saw the first non-path separator, mark this as the end of our
       // extension
       matchedSlash = false;
       end = i + 1;
     }
     if (code === 46 /*.*/) {
         // If this is our first dot, mark it as the start of our extension
         if (startDot === -1)
           startDot = i;
         else if (preDotState !== 1)
           preDotState = 1;
     } else if (startDot !== -1) {
       // We saw a non-dot and non-path separator before our dot, so we should
       // have a good chance at having a non-empty extension
       preDotState = -1;
     }
   }

   if (startDot === -1 || end === -1 ||
       // We saw a non-dot character immediately before the dot
       preDotState === 0 ||
       // The (right-most) trimmed path component is exactly '..'
       preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
     return '';
   }
   return path.slice(startDot, end);
 };

 function filter (xs, f) {
     if (xs.filter) return xs.filter(f);
     var res = [];
     for (var i = 0; i < xs.length; i++) {
         if (f(xs[i], i, xs)) res.push(xs[i]);
     }
     return res;
 }

 // String.prototype.substr - negative index don't work in IE8
 var substr = 'ab'.substr(-1) === 'b'
     ? function (str, start, len) { return str.substr(start, len) }
     : function (str, start, len) {
         if (start < 0) start = str.length + start;
         return str.substr(start, len);
     }
 ;
	// .dirname, .basename, and .extname methods are extracted from Node.js v8.11.1,
	// backported and transplited with Babel, with backwards-compat fixes

	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.

	// resolves . and .. elements in a path array with directory names there
	// must be no slashes, empty elements, or device names (c:\) in the array
	// (so also no leading and trailing slashes - it does not distinguish
	// relative and absolute paths)
	function normalizeArray(parts, allowAboveRoot) {
	// if the path tries to go above the root, `up` ends up > 0
	var up = 0;
	for (var i = parts.length - 1; i >= 0; i--) {
	var last = parts[i];
	if (last === '.') {
	parts.splice(i, 1);
	} else if (last === '..') {
	parts.splice(i, 1);
	up++;
	} else if (up) {
	parts.splice(i, 1);
	up--;
	}
	}

	// if the path is allowed to go above the root, restore leading ..s
	if (allowAboveRoot) {
	for (; up--; up) {
	parts.unshift('..');
	}
	}

	return parts;
	}

	// path.resolve([from ...], to)
	// posix version
	exports.resolve = function() {
	var resolvedPath = '',
	resolvedAbsolute = false;

	for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
	var path = (i >= 0) ? arguments[i] : process.cwd();

	// Skip empty and invalid entries
	if (typeof path !== 'string') {
	throw new TypeError('Arguments to path.resolve must be strings');
	} else if (!path) {
	continue;
	}

	resolvedPath = path + '/' + resolvedPath;
	resolvedAbsolute = path.charAt(0) === '/';
	}

	// At this point the path should be resolved to a full absolute path, but
	// handle relative paths to be safe (might happen when process.cwd() fails)

	// Normalize the path
	resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
	return !!p;
	}), !resolvedAbsolute).join('/');

	return ((resolvedAbsolute ? '/' : '') + resolvedPath) \|\| '.';
	};

	// path.normalize(path)
	// posix version
	exports.normalize = function(path) {
	var isAbsolute = exports.isAbsolute(path),
	trailingSlash = substr(path, -1) === '/';

	// Normalize the path
	path = normalizeArray(filter(path.split('/'), function(p) {
	return !!p;
	}), !isAbsolute).join('/');

	if (!path && !isAbsolute) {
	path = '.';
	}
	if (path && trailingSlash) {
	path += '/';
	}

	return (isAbsolute ? '/' : '') + path;
	};

	// posix version
	exports.isAbsolute = function(path) {
	return path.charAt(0) === '/';
	};

	// posix version
	exports.join = function() {
	var paths = Array.prototype.slice.call(arguments, 0);
	return exports.normalize(filter(paths, function(p, index) {
	if (typeof p !== 'string') {
	throw new TypeError('Arguments to path.join must be strings');
	}
	return p;
	}).join('/'));
	};


	// path.relative(from, to)
	// posix version
	exports.relative = function(from, to) {
	from = exports.resolve(from).substr(1);
	to = exports.resolve(to).substr(1);

	function trim(arr) {
	var start = 0;
	for (; start < arr.length; start++) {
	if (arr[start] !== '') break;
	}

	var end = arr.length - 1;
	for (; end >= 0; end--) {
	if (arr[end] !== '') break;
	}

	if (start > end) return [];
	return arr.slice(start, end - start + 1);
	}

	var fromParts = trim(from.split('/'));
	var toParts = trim(to.split('/'));

	var length = Math.min(fromParts.length, toParts.length);
	var samePartsLength = length;
	for (var i = 0; i < length; i++) {
	if (fromParts[i] !== toParts[i]) {
	samePartsLength = i;
	break;
	}
	}

	var outputParts = [];
	for (var i = samePartsLength; i < fromParts.length; i++) {
	outputParts.push('..');
	}

	outputParts = outputParts.concat(toParts.slice(samePartsLength));

	return outputParts.join('/');
	};

	exports.sep = '/';
	exports.delimiter = ':';

	exports.dirname = function (path) {
	if (typeof path !== 'string') path = path + '';
	if (path.length === 0) return '.';
	var code = path.charCodeAt(0);
	var hasRoot = code === 47 ///;
	var end = -1;
	var matchedSlash = true;
	for (var i = path.length - 1; i >= 1; --i) {
	code = path.charCodeAt(i);
	if (code === 47 ///) {
	if (!matchedSlash) {
	end = i;
	break;
	}
	} else {
	// We saw the first non-path separator
	matchedSlash = false;
	}
	}

	if (end === -1) return hasRoot ? '/' : '.';
	if (hasRoot && end === 1) {
	// return '//';
	// Backwards-compat fix:
	return '/';
	}
	return path.slice(0, end);
	};

	function basename(path) {
	if (typeof path !== 'string') path = path + '';

	var start = 0;
	var end = -1;
	var matchedSlash = true;
	var i;

	for (i = path.length - 1; i >= 0; --i) {
	if (path.charCodeAt(i) === 47 ///) {
	// If we reached a path separator that was not part of a set of path
	// separators at the end of the string, stop now
	if (!matchedSlash) {
	start = i + 1;
	break;
	}
	} else if (end === -1) {
	// We saw the first non-path separator, mark this as the end of our
	// path component
	matchedSlash = false;
	end = i + 1;
	}
	}

	if (end === -1) return '';
	return path.slice(start, end);
	}

	// Uses a mixed approach for backwards-compatibility, as ext behavior changed
	// in new Node.js versions, so only basename() above is backported here
	exports.basename = function (path, ext) {
	var f = basename(path);
	if (ext && f.substr(-1 * ext.length) === ext) {
	f = f.substr(0, f.length - ext.length);
	}
	return f;
	};

	exports.extname = function (path) {
	if (typeof path !== 'string') path = path + '';
	var startDot = -1;
	var startPart = 0;
	var end = -1;
	var matchedSlash = true;
	// Track the state of characters (if any) we see before our first dot and
	// after any path separator we find
	var preDotState = 0;
	for (var i = path.length - 1; i >= 0; --i) {
	var code = path.charCodeAt(i);
	if (code === 47 ///) {
	// If we reached a path separator that was not part of a set of path
	// separators at the end of the string, stop now
	if (!matchedSlash) {
	startPart = i + 1;
	break;
	}
	continue;
	}
	if (end === -1) {
	// We saw the first non-path separator, mark this as the end of our
	// extension
	matchedSlash = false;
	end = i + 1;
	}
	if (code === 46 /./) {
	// If this is our first dot, mark it as the start of our extension
	if (startDot === -1)
	startDot = i;
	else if (preDotState !== 1)
	preDotState = 1;
	} else if (startDot !== -1) {
	// We saw a non-dot and non-path separator before our dot, so we should
	// have a good chance at having a non-empty extension
	preDotState = -1;
	}
	}

	if (startDot === -1 \|\| end === -1 \|\|
	// We saw a non-dot character immediately before the dot
	preDotState === 0 \|\|
	// The (right-most) trimmed path component is exactly '..'
	preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
	return '';
	}
	return path.slice(startDot, end);
	};

	function filter (xs, f) {
	if (xs.filter) return xs.filter(f);
	var res = [];
	for (var i = 0; i < xs.length; i++) {
	if (f(xs[i], i, xs)) res.push(xs[i]);
	}
	return res;
	}

	// String.prototype.substr - negative index don't work in IE8
	var substr = 'ab'.substr(-1) === 'b'
	? function (str, start, len) { return str.substr(start, len) }
	: function (str, start, len) {
	if (start < 0) start = str.length + start;
	return str.substr(start, len);
	}
	;