refactor: simplify project architecture

regroup logic which was broken down in too many files
make most functions public
move unit tests in proper locations

Author: BoxBoxJason

Containerfile

@@ -15,7 +15,7 @@ ENV GO111MODULE=on \
 RUN go mod tidy && \
     go build -ldflags "-X 'main.version=${VERSION}'" -o /app/bin/gitlab-sync ./cmd/main.go
 
-FROM alpine:3.22.0 as security_provider
+FROM alpine:3.22.0 AS security_provider
 
 RUN addgroup -S gitlab-sync \
     && adduser -S gitlab-sync -G gitlab-sync

cmd/main.go

@@ -30,7 +30,7 @@ func main() {
 		Long:    "Fully customizable gitlab repositories and groups mirroring between two (or one) gitlab instances.",
 		Run: func(cmd *cobra.Command, cmdArgs []string) {
 			// Set up the logger
-			setupZapLogger(args.Verbose, strings.TrimSpace(logFile))
+			SetupZapLogger(args.Verbose, strings.TrimSpace(logFile))
 			zap.L().Debug("Verbose mode enabled")
 			zap.L().Debug("Parsing command line arguments")
 
@@ -128,11 +128,11 @@ func promptForMandatoryInput(defaultValue string, prompt string, errorMsg string
 	return input
 }
 
-// setupZapLogger sets up the Zap logger with the specified verbosity level and optional file output.
+// SetupZapLogger sets up the Zap logger with the specified verbosity level and optional file output.
 // It configures the logger to use ISO8601 time format and capitalizes the log levels.
 // The logger is set to production mode by default, but can be configured for debug mode if verbose is true.
 // If filename is not empty, the logger's output is redirected to the specified file.
-func setupZapLogger(verbose bool, filename string) {
+func SetupZapLogger(verbose bool, filename string) {
 	// Set up the logger configuration
 	config := zap.NewProductionConfig()
 	config.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder

cmd/main_test.go

@@ -61,7 +61,7 @@ func TestSetupZapLogger(t *testing.T) {
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
 			// Call the setup function with appropriate parameters.
-			setupZapLogger(tc.verbose, tc.filename)
+			SetupZapLogger(tc.verbose, tc.filename)
 
 			// Check that the logger's log level for debug is set as expected.
 			if zap.L().Core().Enabled(zap.DebugLevel) != tc.debugExpected {