add node_modules to address #4364

1 files changed, 119 insertions, 0 deletions

diff --git a/node_modules/detect-indent/index.js b/node_modules/detect-indent/index.js
new file mode 100644
index 000000000..e9b91424c
--- /dev/null
+++ b/node_modules/detect-indent/index.js
@@ -0,0 +1,119 @@
+'use strict';
+var repeating = require('repeating');
+
+// detect either spaces or tabs but not both to properly handle tabs
+// for indentation and spaces for alignment
+var INDENT_RE = /^(?:( )+|\t+)/;
+
+function getMostUsed(indents) {
+	var result = 0;
+	var maxUsed = 0;
+	var maxWeight = 0;
+
+	for (var n in indents) {
+		var indent = indents[n];
+		var u = indent[0];
+		var w = indent[1];
+
+		if (u > maxUsed || u === maxUsed && w > maxWeight) {
+			maxUsed = u;
+			maxWeight = w;
+			result = +n;
+		}
+	}
+
+	return result;
+}
+
+module.exports = function (str) {
+	if (typeof str !== 'string') {
+		throw new TypeError('Expected a string');
+	}
+
+	// used to see if tabs or spaces are the most used
+	var tabs = 0;
+	var spaces = 0;
+
+	// remember the size of previous line's indentation
+	var prev = 0;
+
+	// remember how many indents/unindents as occurred for a given size
+	// and how much lines follow a given indentation
+	//
+	// indents = {
+	//    3: [1, 0],
+	//    4: [1, 5],
+	//    5: [1, 0],
+	//   12: [1, 0],
+	// }
+	var indents = {};
+
+	// pointer to the array of last used indent
+	var current;
+
+	// whether the last action was an indent (opposed to an unindent)
+	var isIndent;
+
+	str.split(/\n/g).forEach(function (line) {
+		if (!line) {
+			// ignore empty lines
+			return;
+		}
+
+		var indent;
+		var matches = line.match(INDENT_RE);
+
+		if (!matches) {
+			indent = 0;
+		} else {
+			indent = matches[0].length;
+
+			if (matches[1]) {
+				spaces++;
+			} else {
+				tabs++;
+			}
+		}
+
+		var diff = indent - prev;
+		prev = indent;
+
+		if (diff) {
+			// an indent or unindent has been detected
+
+			isIndent = diff > 0;
+
+			current = indents[isIndent ? diff : -diff];
+
+			if (current) {
+				current[0]++;
+			} else {
+				current = indents[diff] = [1, 0];
+			}
+		} else if (current) {
+			// if the last action was an indent, increment the weight
+			current[1] += +isIndent;
+		}
+	});
+
+	var amount = getMostUsed(indents);
+
+	var type;
+	var actual;
+	if (!amount) {
+		type = null;
+		actual = '';
+	} else if (spaces >= tabs) {
+		type = 'space';
+		actual = repeating(' ', amount);
+	} else {
+		type = 'tab';
+		actual = repeating('\t', amount);
+	}
+
+	return {
+		amount: amount,
+		type: type,
+		indent: actual
+	};
+};