added grunt build file for linting, fixed some minor lint errors

Author: schaermu

grunt.js

@@ -0,0 +1,34 @@
+module.exports = function(grunt) {
+  // Project configuration.
+  grunt.initConfig({
+    pkg: '<json:package.json>',
+    lint: {
+      files: ['grunt.js', 'lib/**/*.js']
+    },
+    watch: {
+      files: '<config:lint.files>',
+      tasks: 'default'
+    },
+    jshint: {
+      options: {
+        curly: true,
+        eqeqeq: true,
+        immed: true,
+        latedef: true,
+        newcap: true,
+        noarg: true,
+        sub: true,
+        undef: true,
+        boss: true,
+        eqnull: true,
+        node: true
+      },
+      globals: {
+        exports: true
+      }
+    }
+  });
+
+  // Default task.
+  grunt.registerTask('default', 'lint');
+};

lib/calculate.js

@@ -8,7 +8,7 @@ exports = module.exports = function Calculate(command) {
     } else {
       return (p1.x === p2.x && p1.y === p2.y);
     }
-  }
+  };
 
   this._calculatePadding = function(data) {
     if (data.video.aspect) {

lib/extensions.js

@@ -5,7 +5,7 @@ exports = module.exports = function Extensions() {
       return process.env.FFMPEG_PATH;
     }
     return 'ffmpeg';
-  }
+  };
 
   this.toAspectRatio = function(ar) {
     var p = ar.split(':');
@@ -17,7 +17,7 @@ exports = module.exports = function Extensions() {
         y: parseInt(p[1], 10)
       };
     }
-  }
+  };
 
   this.ffmpegTimemarkToSeconds = function(timemark) {
     var parts = timemark.split(':');
@@ -35,7 +35,7 @@ exports = module.exports = function Extensions() {
     secs += parseInt(secParts[0], 10);
 
     return secs;
-  }
+  };
 
   this.parseVersionString = function(versionstr) {
      var x = versionstr.split('.');
@@ -48,7 +48,7 @@ exports = module.exports = function Extensions() {
       minor: min,
       patch: pat
     };
-  }
+  };
 
   this.atLeastVersion = function(actualVersion, minVersion) {
     var minimum = this.parseVersionString(minVersion);
@@ -67,5 +67,5 @@ exports = module.exports = function Extensions() {
         }
       }
     }
-  }
+  };
 };

lib/fluent-ffmpeg.js

@@ -217,7 +217,7 @@ function FfmpegCommand(args) {
     if (!a && !b) {
       return 0;
     }
-    while (a != 0) {
+    while (a !== 0) {
       var z = b % a;
       b = a;
       a = z;

lib/index.js

@@ -8,22 +8,22 @@ exports = module.exports = function Metadata(inputfile) {
         path = '"' + path + '"';
     }
     return path;
-  }
+  };
 
   this.inputfile = inputfile;
 
   // for internal use
   this.getMetadata = function(inputfile, callback) {
     this.inputfile = inputfile;
     this._loadDataInternal(callback);
-  }
+  };
 
   // for external use
   this.get = function(callback) {
     // import extensions for external call
     require('./extensions').apply(Metadata.prototype);
     this._loadDataInternal(callback);
-  }
+  };
 
   this._loadDataInternal = function(callback) {
     var inputfile = this.escapedPath(this.inputfile);
@@ -117,5 +117,5 @@ exports = module.exports = function Metadata(inputfile) {
 
       callback(ret);
     });
-  }
+  };
 };