Refactor code

Author: Dmitry Tretyakov

app/build.gradle

@@ -9,17 +9,17 @@ def getGitHubCommit = {
         def changeOutput = new ByteArrayOutputStream()
         def gitVersionName = ""
 
-        providers.exec {
-            commandLine 'git', 'rev-list', '--max-count=1', 'HEAD'
-            standardOutput = hashOutput
+        execOperations.exec {
+            it.commandLine 'git', 'rev-list', '--max-count=1', 'HEAD'
+            it.standardOutput = hashOutput
         }
 
-        providers.exec {
-            commandLine 'git', 'diff-index', '--shortstat', 'HEAD'
-            standardOutput = changeOutput
+        execOperations.exec {
+            it.commandLine 'git', 'diff-index', '--shortstat', 'HEAD'
+            it.standardOutput = changeOutput
         }
 
-        tasks.gitVersionName = hashOutput.toString().trim().substring(0, 7);
+        gitVersionName = hashOutput.toString().trim().substring(0, 7);
         if (!changeOutput.toString().trim().empty) {
             def pattern = Pattern.compile("\\d+");
             def matcher = pattern.matcher(changeOutput.toString().trim())