style: use linter to style the code

cmd/gogitlabber/git.go

@@ -8,19 +8,26 @@ import (
 	"sync"
 )
 
+// add a mutex to safely increment shared counters
 var mu sync.Mutex
+
 func checkoutRepositories(repositories []Repository, concurrency int) {
 
+	// create a waitgroup + semaphore channel
 	var wg sync.WaitGroup
 	semaphore := make(chan struct{}, concurrency)
 
+	// manage all repositories found
 	for _, repo := range repositories {
 
+		// increment waitgroup counter + acquire semaphore slot
 		wg.Add(1)
 		semaphore <- struct{}{}
 
+		// start go routine per repo
 		go func(repo Repository) {
 
+			// ensure we release the semaphore and close the goroutine
 			defer func() {
 				<-semaphore
 				wg.Done()
@@ -63,6 +70,8 @@ func checkoutRepositories(repositories []Repository, concurrency int) {
 				if err != nil {
 					log.Printf("ERROR: %v\n", err)
 				}
+
+				// set a lock, increment counters and unlock
 				mu.Lock()
 				clonedCount++
 				mu.Unlock()
@@ -76,6 +85,8 @@ func checkoutRepositories(repositories []Repository, concurrency int) {
 			default:
 				log.Printf("ERROR: decided not to clone or pull repository %v\n", repoName)
 				log.Printf("ERROR: this is why: %v\n", repoStatus)
+
+				// set a lock, increment counters and unlock
 				mu.Lock()
 				errorCount++
 				mu.Unlock()
@@ -83,6 +94,8 @@ func checkoutRepositories(repositories []Repository, concurrency int) {
 			}
 		}(repo)
 	}
+
+	// wait for goroutines
 	wg.Wait()
 }
 
@@ -109,11 +122,19 @@ func pullRepository(repoName string, repoDestination string) {
 	// pull repository
 	pullCmd := exec.Command("git", "-C", repoDestination, "pull", remote)
 	pullOutput, err := pullCmd.CombinedOutput()
-	pulledCount = pulledCount + 1
+
+	// set a lock, increment counters and unlock
+	mu.Lock()
+	pulledCount++
+	mu.Unlock()
 
 	if err != nil {
-		errorCount = errorCount + 1
+
-		pulledCount = pulledCount - 1
+		// set a lock, increment counters and unlock
+		mu.Lock()
+		errorCount++
+		pulledCount--
+		mu.Unlock()
 
 		switch {
 		case strings.Contains(string(pullOutput), "You have unstaged changes"):