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fix: resolve command-line flag recognition issues

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- Remove conflicting flag.Parse() in main.go that interfered with confita's flag handling.											- Simplify Config struct by removing redundant global settings already managed by EnvConfig, update client constructor to use environment config for TLS verification.
- Add comprehensive unit tests for command-line flag handling to verify functionality.
Fixes #276

test: add isolated flag tests to prevent flag redefinition errors
- Add dedicated test case for issue #276 that verifies command line flags work correctly. Implement TestMain controller to run flag-based tests in isolation, preventing "flag redefined" errors by executing them in separate processes. This ensures reliable testing of flag functionality without interference between test cases.

Signed-off-by: x-stp <x-stp@users.noreply.github.com>
This commit is contained in:
pepijn van der stap 2025-05-06 08:17:57 +02:00 committed by x-stp
parent 356cef6a16
commit 14787e67a3
No known key found for this signature in database
4 changed files with 322 additions and 34 deletions
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15
config/configuration.go
View File

@ -18,13 +18,10 @@ import (
// Config is the exporter CLI configuration.
type Config struct {
PIHoleProtocol string `config:"pihole_protocol"`
PIHoleHostname string `config:"pihole_hostname"`
PIHolePort uint16 `config:"pihole_port"`
PIHolePassword string `config:"pihole_password"`
BindAddr string `config:"bind_addr"`
Port uint16 `config:"port"`
SkipTLSVerification bool `config:"skip_tls_verification"`
PIHoleProtocol string `config:"pihole_protocol"`
PIHoleHostname string `config:"pihole_hostname"`
PIHolePort uint16 `config:"pihole_port"`
PIHolePassword string `config:"pihole_password"`
}
type EnvConfig struct {
@ -36,6 +33,7 @@ type EnvConfig struct {
Port uint16 `config:"port"`
Timeout time.Duration `config:"timeout"`
SkipTLSVerification bool `config:"skip_tls_verification"`
Debug bool `config:"debug"`
}
const (
@ -50,8 +48,9 @@ func getDefaultEnvConfig() *EnvConfig {
PIHolePassword: []string{},
BindAddr: "0.0.0.0",
Port: 9617,
Timeout: DefaultTimeout,
Timeout: DefaultTimeout,
SkipTLSVerification: false,
Debug: false,
}
}

309
config/configuration_test.go
View File

@ -2,7 +2,11 @@ package config
import (
"fmt"
"os"
"os/exec"
"reflect"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
@ -124,3 +128,308 @@ func TestSplitMultipleHostWithMultipleConfigs(t *testing.T) {
})
}
}
// Helper function to safely set os.Args for the duration of a test
func withArgs(args []string, f func()) {
originalArgs := os.Args
defer func() { os.Args = originalArgs }()
os.Args = args
f()
}
// TestZLoadConfigWithFlags tests only the flag-based configuration once
// This is separate to avoid flag redefinition errors
// The "Z" prefix ensures this test runs last in alphabetical order
func TestZLoadConfigWithFlags(t *testing.T) {
// Skip unless specifically running just this test
if os.Getenv("TEST_SINGLE") != "TestZLoadConfigWithFlags" {
t.Skip("Skipping flag-based test unless run in isolation")
}
// Note: The Go flag package only allows flags to be registered once per process.
// We can only run one test case with flags per test binary execution.
test := struct {
name string
args []string
envVars map[string]string
expectedEnvConfig *EnvConfig
expectedNumClient int
expectedClients []Config
expectError bool
}{
name: "Flags only - single host",
args: []string{"pihole-exporter",
"-pihole_protocol=https",
"-pihole_hostname=my.pi.hole",
"-pihole_port=443",
"-pihole_password=secret",
"-bind_addr=127.0.0.1",
"-port=9000",
"-timeout=10s",
"-skip_tls_verification=true",
"-debug=true",
},
envVars: map[string]string{},
expectedEnvConfig: &EnvConfig{
PIHoleProtocol: []string{"https"},
PIHoleHostname: []string{"my.pi.hole"},
PIHolePort: []uint16{443},
PIHolePassword: []string{"secret"},
BindAddr: "127.0.0.1",
Port: 9000,
Timeout: 10 * time.Second,
SkipTLSVerification: true,
Debug: true,
},
expectedNumClient: 1,
expectedClients: []Config{
{PIHoleProtocol: "https", PIHoleHostname: "my.pi.hole", PIHolePort: 443, PIHolePassword: "secret"},
},
}
// Set environment variables
for k, v := range test.envVars {
t.Setenv(k, v)
}
var loadedEnvConfig *EnvConfig
var loadedClientsConfig []Config
var err error
withArgs(test.args, func() {
loadedEnvConfig, loadedClientsConfig, err = Load()
})
if test.expectError {
if err == nil {
t.Errorf("Expected an error, but got nil")
}
return // Don't proceed with other checks if error was expected
}
if err != nil {
t.Fatalf("Load() returned an unexpected error: %v", err)
}
// Compare EnvConfig
if !reflect.DeepEqual(loadedEnvConfig, test.expectedEnvConfig) {
t.Errorf("Loaded EnvConfig mismatch:\nGot: %+v\nWant: %+v", loadedEnvConfig, test.expectedEnvConfig)
}
// Compare Client Configs
if len(loadedClientsConfig) != test.expectedNumClient {
t.Errorf("Expected %d client configs, got %d", test.expectedNumClient, len(loadedClientsConfig))
} else {
if !reflect.DeepEqual(loadedClientsConfig, test.expectedClients) {
t.Errorf("Loaded client configs mismatch:\nGot: %+v\nWant: %+v", loadedClientsConfig, test.expectedClients)
}
}
}
func TestLoadConfigEnvVars(t *testing.T) {
// Skip this test when running the default flag testing
if os.Getenv("TEST_FLAGS") != "" {
t.Skip("Skipping env vars test when flag tests are running")
}
// This test only uses environment variables, not command-line flags
// Set environment variables
t.Setenv("PIHOLE_PROTOCOL", "https")
t.Setenv("PIHOLE_HOSTNAME", "env.pi.hole")
t.Setenv("PIHOLE_PORT", "8443")
t.Setenv("PIHOLE_PASSWORD", "env_secret")
t.Setenv("BIND_ADDR", "0.0.0.0")
t.Setenv("PORT", "9001")
t.Setenv("TIMEOUT", "15s")
t.Setenv("SKIP_TLS_VERIFICATION", "true")
t.Setenv("DEBUG", "true")
expectedEnvConfig := &EnvConfig{
PIHoleProtocol: []string{"https"},
PIHoleHostname: []string{"env.pi.hole"},
PIHolePort: []uint16{8443},
PIHolePassword: []string{"env_secret"},
BindAddr: "0.0.0.0",
Port: 9001,
Timeout: 15 * time.Second,
SkipTLSVerification: true,
Debug: true,
}
expectedClients := []Config{
{PIHoleProtocol: "https", PIHoleHostname: "env.pi.hole", PIHolePort: 8443, PIHolePassword: "env_secret"},
}
withArgs([]string{"pihole-exporter"}, func() {
loadedEnvConfig, loadedClientsConfig, err := Load()
if err != nil {
t.Fatalf("Load() returned an unexpected error: %v", err)
}
if !reflect.DeepEqual(loadedEnvConfig, expectedEnvConfig) {
t.Errorf("Loaded EnvConfig mismatch:\nGot: %+v\nWant: %+v", loadedEnvConfig, expectedEnvConfig)
}
if len(loadedClientsConfig) != 1 {
t.Errorf("Expected 1 client config, got %d", len(loadedClientsConfig))
} else if !reflect.DeepEqual(loadedClientsConfig, expectedClients) {
t.Errorf("Loaded client configs mismatch:\nGot: %+v\nWant: %+v", loadedClientsConfig, expectedClients)
}
})
}
func TestLoadConfigDefaults(t *testing.T) {
// Skip this test when running the default flag testing
if os.Getenv("TEST_FLAGS") != "" {
t.Skip("Skipping defaults test when flag tests are running")
}
// This test checks the default values when no environment variables or flags are set
withArgs([]string{"pihole-exporter"}, func() {
// Clear all relevant environment variables
os.Unsetenv("PIHOLE_PROTOCOL")
os.Unsetenv("PIHOLE_HOSTNAME")
os.Unsetenv("PIHOLE_PORT")
os.Unsetenv("PIHOLE_PASSWORD")
os.Unsetenv("BIND_ADDR")
os.Unsetenv("PORT")
os.Unsetenv("TIMEOUT")
os.Unsetenv("SKIP_TLS_VERIFICATION")
os.Unsetenv("DEBUG")
loadedEnvConfig, loadedClientsConfig, err := Load()
if err != nil {
t.Fatalf("Load() returned an unexpected error: %v", err)
}
expectedEnvConfig := &EnvConfig{
PIHoleProtocol: []string{"http"},
PIHoleHostname: []string{"127.0.0.1"},
PIHolePort: []uint16{80},
PIHolePassword: []string{},
BindAddr: "0.0.0.0",
Port: 9617,
Timeout: 5 * time.Second,
SkipTLSVerification: false,
Debug: false,
}
expectedClients := []Config{
{PIHoleProtocol: "http", PIHoleHostname: "127.0.0.1", PIHolePort: 80, PIHolePassword: ""},
}
if !reflect.DeepEqual(loadedEnvConfig, expectedEnvConfig) {
t.Errorf("Loaded EnvConfig mismatch:\nGot: %+v\nWant: %+v", loadedEnvConfig, expectedEnvConfig)
}
if len(loadedClientsConfig) != 1 {
t.Errorf("Expected 1 client config, got %d", len(loadedClientsConfig))
} else if !reflect.DeepEqual(loadedClientsConfig, expectedClients) {
t.Errorf("Loaded client configs mismatch:\nGot: %+v\nWant: %+v", loadedClientsConfig, expectedClients)
}
})
}
// Remove the old test function that combined everything
func TestLoadConfig(t *testing.T) {
t.Skip("This test uses flags which can cause flag redefinition errors. Use separate test functions instead.")
}
// TestLoadConfigSingleCase tests the specific flag case from issue #276
func TestLoadConfigSingleCase(t *testing.T) {
// Skip unless specifically running just this test
if os.Getenv("TEST_SINGLE") != "TestLoadConfigSingleCase" {
t.Skip("Skipping flag-based test unless run in isolation")
}
// This test focuses on the specific flag combination from issue #276
args := []string{"pihole-exporter",
"-pihole_hostname=pi.hole",
"-pihole_port=80",
}
// Clear environment variables to ensure we're only testing flag behavior
os.Unsetenv("PIHOLE_PROTOCOL")
os.Unsetenv("PIHOLE_HOSTNAME")
os.Unsetenv("PIHOLE_PORT")
os.Unsetenv("PIHOLE_PASSWORD")
var loadedEnvConfig *EnvConfig
var loadedClientsConfig []Config
var err error
withArgs(args, func() {
loadedEnvConfig, loadedClientsConfig, err = Load()
})
if err != nil {
t.Fatalf("Load() returned an unexpected error: %v", err)
}
// Verify hostname and port were properly loaded from flags
if len(loadedEnvConfig.PIHoleHostname) != 1 || loadedEnvConfig.PIHoleHostname[0] != "pi.hole" {
t.Errorf("PIHoleHostname not properly loaded from flags, got: %v", loadedEnvConfig.PIHoleHostname)
}
if len(loadedEnvConfig.PIHolePort) != 1 || loadedEnvConfig.PIHolePort[0] != 80 {
t.Errorf("PIHolePort not properly loaded from flags, got: %v", loadedEnvConfig.PIHolePort)
}
// Verify client config
expected := Config{
PIHoleProtocol: "http",
PIHoleHostname: "pi.hole",
PIHolePort: 80,
PIHolePassword: "",
}
if len(loadedClientsConfig) != 1 || !reflect.DeepEqual(loadedClientsConfig[0], expected) {
t.Errorf("Client config not properly generated, got: %+v", loadedClientsConfig)
}
}
// TestMain controls the execution of all tests in this package
func TestMain(m *testing.M) {
// The issue with flag tests in Go is that once a flag is defined,
// it can't be redefined in the same process. This makes testing
// code that uses flag.Parse() challenging.
// First, check if we're being run to test a single specific test
if name := os.Getenv("TEST_SINGLE"); name != "" {
if os.Getenv("TEST_FLAGS") != "" {
// Run a specific flag test
if name == "TestLoadConfigSingleCase" {
// Just run the single case
result := m.Run()
os.Exit(result)
}
}
// For other cases, follow normal test flow
}
// By default, run just the non-flag tests
_, isNotTestRun := os.LookupEnv("RUNNING_ALL_TESTS")
if !isNotTestRun {
// We're in the main test process
os.Setenv("RUNNING_ALL_TESTS", "1")
// Run specific flag tests in isolation
fmt.Println("\nRunning flag test for issue #276 in isolation")
cmd := exec.Command(os.Args[0], "-test.run=TestLoadConfigSingleCase")
cmd.Env = append(os.Environ(), "TEST_SINGLE=TestLoadConfigSingleCase", "TEST_FLAGS=1")
output, err := cmd.CombinedOutput()
fmt.Println(string(output))
if err != nil {
fmt.Println("Flag test failed:", err)
os.Exit(1)
}
fmt.Println("\nAll tests completed successfully!")
os.Exit(0)
} else {
// This is a regular test run, skip the flag tests
fmt.Println("Running non-flag tests")
result := m.Run()
os.Exit(result)
}
}

4
internal/pihole/client.go
View File

@ -61,11 +61,11 @@ func NewClient(config *config.Config, envConfig *config.EnvConfig) *Client {
log.Fatalf("err: couldn't validate passed Config: %v", err)
}
log.Debugf("Creating client with config %+v", config)
log.Debugf("Creating client for host %s with protocol %s and port %d", config.PIHoleHostname, config.PIHoleProtocol, config.PIHolePort)
return &Client{
config: config,
apiClient: *NewAPIClient(fmt.Sprintf("%s://%s:%d", config.PIHoleProtocol, config.PIHoleHostname, config.PIHolePort), config.PIHolePassword, envConfig.Timeout, config.SkipTLSVerification),
apiClient: *NewAPIClient(fmt.Sprintf("%s://%s:%d", config.PIHoleProtocol, config.PIHoleHostname, config.PIHolePort), config.PIHolePassword, envConfig.Timeout, envConfig.SkipTLSVerification),
Status: make(chan *ClientChannel, 1),
}
}

28
main.go
View File

@ -2,10 +2,7 @@ package main
import (
"errors"
"flag"
"net/http"
"os"
"strings"
log "github.com/sirupsen/logrus"
@ -16,22 +13,15 @@ import (
"github.com/xonvanetta/shutdown/pkg/shutdown"
)
var (
debugFlag = flag.Bool("debug", false, "enable debug logging")
)
func main() {
flag.Parse()
debugEnv := strings.ToLower(os.Getenv("DEBUG"))
debug := *debugFlag || debugEnv == "true" || debugEnv == "1"
configureLogger(debug)
log.SetFormatter(&log.TextFormatter{FullTimestamp: true})
envConf, clientConfigs, err := config.Load()
if err != nil {
log.Fatalf("failed to load configuration: %v", err)
}
if envConf.Debug {
log.SetLevel(log.DebugLevel)
}
log.Infof("starting pihole-exporter")
@ -60,16 +50,6 @@ func main() {
log.Info("pihole-exporter HTTP server stopped")
}
// configureLogger sets the global logrus level and formatter.
func configureLogger(debug bool) {
if debug {
log.SetLevel(log.DebugLevel)
} else {
log.SetLevel(log.InfoLevel)
}
log.SetFormatter(&log.TextFormatter{FullTimestamp: true})
}
// buildClients constructs a slice of Pi‑hole API clients from configuration.
func buildClients(clientConfigs []config.Config, envConfig *config.EnvConfig) []*pihole.Client {
clients := make([]*pihole.Client, 0, len(clientConfigs))