Initial Import

node_modules/shelljs/src/grep.js

@@ -0,0 +1,52 @@
+var common = require('./common');
+var fs = require('fs');
+
+//@
+//@ ### grep([options ,] regex_filter, file [, file ...])
+//@ ### grep([options ,] regex_filter, file_array)
+//@ Available options:
+//@
+//@ + `-v`: Inverse the sense of the regex and print the lines not matching the criteria.
+//@
+//@ Examples:
+//@
+//@ ```javascript
+//@ grep('-v', 'GLOBAL_VARIABLE', '*.js');
+//@ grep('GLOBAL_VARIABLE', '*.js');
+//@ ```
+//@
+//@ Reads input string from given files and returns a string containing all lines of the
+//@ file that match the given `regex_filter`. Wildcard `*` accepted.
+function _grep(options, regex, files) {
+  options = common.parseOptions(options, {
+    'v': 'inverse'
+  });
+
+  if (!files)
+    common.error('no paths given');
+
+  if (typeof files === 'string')
+    files = [].slice.call(arguments, 2);
+  // if it's array leave it as it is
+
+  files = common.expand(files);
+
+  var grep = '';
+  files.forEach(function(file) {
+    if (!fs.existsSync(file)) {
+      common.error('no such file or directory: ' + file, true);
+      return;
+    }
+
+    var contents = fs.readFileSync(file, 'utf8'),
+        lines = contents.split(/\r*\n/);
+    lines.forEach(function(line) {
+      var matched = line.match(regex);
+      if ((options.inverse && !matched) || (!options.inverse && matched))
+        grep += line + '\n';
+    });
+  });
+
+  return common.ShellString(grep);
+}
+module.exports = _grep;