feat: support custom regexp

Closes #126

README.md

@@ -36,7 +36,8 @@ grunt.initConfig({
       pushTo: 'upstream',
       gitDescribeOptions: '--tags --always --abbrev=1 --dirty=-d',
       globalReplace: false,
-      prereleaseName: null
+      prereleaseName: null,
+      regExp: null
     }
   },
 })
@@ -137,6 +138,11 @@ When left as the default `null` version bump:prereleae will behave as follows:
 * from a previous bump:git
   * 1.0.0-7-g10b5 to 1.0.0-8
 
+#### options.regExp
+Type: `RegExp`
+Default value: `null`
+
+Regex to find and replace version string in files described in `options.files`. If no value is specified, it will use the plugin's default.
 
 ### Usage Examples
 

tasks/bump.js

@@ -39,7 +39,8 @@ module.exports = function(grunt) {
       pushTo: 'upstream',
       gitDescribeOptions: '--tags --always --abbrev=1 --dirty=-d',
       globalReplace: false,
-      prereleaseName: null
+      prereleaseName: null,
+      regExp: null
     });
 
     var dryRun = grunt.option('dry-run');
@@ -82,7 +83,11 @@ module.exports = function(grunt) {
 
     var globalVersion; // when bumping multiple files
     var gitVersion;    // when bumping using `git describe`
-    var VERSION_REGEXP = new RegExp('([\\\'|\\\"]?version[\\\'|\\\"]?[ ]*:[ ]*[\\\'|\\\"]?)(\\\d+\\\.\\\d+\\\.\\\d+(-'+opts.prereleaseName+'\\\.\\\d+)?(-\\\d+)?)[\\\d||A-a|.|-]*([\\\'|\\\"]?)', 'i');
+    var VERSION_REGEXP = opts.regExp || new RegExp(
+      '([\'|\"]?version[\'|\"]?[ ]*:[ ]*[\'|\"]?)(\\d+\\.\\d+\\.\\d+(-' +
+      opts.prereleaseName +
+      '\\.\\d+)?(-\\d+)?)[\\d||A-a|.|-]*([\'|\"]?)', 'i'
+    );
 
     if (opts.globalReplace) {
       VERSION_REGEXP = new RegExp(VERSION_REGEXP.source, 'gi');
@@ -103,9 +108,8 @@ module.exports = function(grunt) {
     runIf(opts.bumpVersion, function() {
       grunt.file.expand(opts.files).forEach(function(file, idx) {
         var version = null;
-        var bumpFrom;
         var content = grunt.file.read(file).replace(VERSION_REGEXP, function(match, prefix, parsedVersion, namedPre, noNamePre, suffix) {
-           version = exactVersionToSet || gitVersion || semver.inc(parsedVersion, versionType || 'patch', opts.prereleaseName);
+          version = exactVersionToSet || gitVersion || semver.inc(parsedVersion, versionType || 'patch', opts.prereleaseName);
           return prefix + version + suffix;
         });