1 files changed, 80 insertions, 0 deletions
diff --git a/node_modules/shelljs/src/uniq.js b/node_modules/shelljs/src/uniq.js
new file mode 100644
index 000000000..8f5da0028
--- /dev/null
+++ b/node_modules/shelljs/src/uniq.js
@@ -0,0 +1,80 @@
+var common = require('./common');
+var fs = require('fs');
+
+// add c spaces to the left of str
+function lpad(c, str) {
+  var res = '' + str;
+  if (res.length < c) {
+    res = Array((c - res.length) + 1).join(' ') + res;
+  }
+  return res;
+}
+
+common.register('uniq', _uniq, {
+  canReceivePipe: true,
+  cmdOptions: {
+    'i': 'ignoreCase',
+    'c': 'count',
+    'd': 'duplicates',
+  },
+});
+
+//@
+//@ ### uniq([options,] [input, [output]])
+//@ Available options:
+//@
+//@ + `-i`: Ignore case while comparing
+//@ + `-c`: Prefix lines by the number of occurrences
+//@ + `-d`: Only print duplicate lines, one for each group of identical lines
+//@
+//@ Examples:
+//@
+//@ ```javascript
+//@ uniq('foo.txt');
+//@ uniq('-i', 'foo.txt');
+//@ uniq('-cd', 'foo.txt', 'bar.txt');
+//@ ```
+//@
+//@ Filter adjacent matching lines from input
+function _uniq(options, input, output) {
+  // Check if this is coming from a pipe
+  var pipe = common.readFromPipe();
+
+  if (!input && !pipe) common.error('no input given');
+
+  var lines = (input ? fs.readFileSync(input, 'utf8') : pipe).
+              trimRight().
+              split(/\r*\n/);
+
+  var compare = function (a, b) {
+    return options.ignoreCase ?
+           a.toLocaleLowerCase().localeCompare(b.toLocaleLowerCase()) :
+           a.localeCompare(b);
+  };
+  var uniqed = lines.reduceRight(function (res, e) {
+    // Perform uniq -c on the input
+    if (res.length === 0) {
+      return [{ count: 1, ln: e }];
+    } else if (compare(res[0].ln, e) === 0) {
+      return [{ count: res[0].count + 1, ln: e }].concat(res.slice(1));
+    } else {
+      return [{ count: 1, ln: e }].concat(res);
+    }
+  }, []).filter(function (obj) {
+                 // Do we want only duplicated objects?
+    return options.duplicates ? obj.count > 1 : true;
+  }).map(function (obj) {
+                 // Are we tracking the counts of each line?
+    return (options.count ? (lpad(7, obj.count) + ' ') : '') + obj.ln;
+  }).join('\n') + '\n';
+
+  if (output) {
+    (new common.ShellString(uniqed)).to(output);
+    // if uniq writes to output, nothing is passed to the next command in the pipeline (if any)
+    return '';
+  } else {
+    return uniqed;
+  }
+}
+
+module.exports = _uniq;