Remove fluent-style kingpin

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>

collector/collector.go

@@ -6,6 +6,7 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/alecthomas/kingpin/v2"
 	"github.com/leoluk/perflib_exporter/perflib"
 	"github.com/prometheus-community/windows_exporter/log"
 	"github.com/prometheus/client_golang/prometheus"
@@ -51,6 +52,8 @@ func getWindowsVersion() float64 {
 }
 
 type collectorBuilder func() (Collector, error)
+type flagsBuilder func(*kingpin.Application)
+type perfCounterNamesBuilder func() []string
 
 var (
 	builders                = make(map[string]collectorBuilder)

collector/dfsr.go

@@ -9,7 +9,11 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
-var dfsrEnabledCollectors = kingpin.Flag("collectors.dfsr.sources-enabled", "Comma-seperated list of DFSR Perflib sources to use.").Default("connection,folder,volume").String()
+const (
+	FlagDfsrEnabledCollectors = "collectors.dfsr.sources-enabled"
+)
+
+var dfsrEnabledCollectors *string
 
 // DFSRCollector contains the metric and state data of the DFSR collectors.
 type DFSRCollector struct {
@@ -82,6 +86,11 @@ func dfsrGetPerfObjectName(collector string) string {
 	return (prefix + suffix)
 }
 
+// newDFSRCollectorFlags is registered
+func newDFSRCollectorFlags(app *kingpin.Application) {
+	dfsrEnabledCollectors = app.Flag(FlagDfsrEnabledCollectors, "Comma-seperated list of DFSR Perflib sources to use.").Default("connection,folder,volume").String()
+}
+
 // newDFSRCollector is registered
 func newDFSRCollector() (Collector, error) {
 	log.Info("dfsr collector is in an experimental state! Metrics for this collector have not been tested.")

collector/exchange.go

@@ -13,6 +13,11 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+const (
+	FlagExchangeListAllCollectors = "collectors.exchange.list"
+	FlagExchangeCollectorsEnabled = "collectors.exchange.enabled"
+)
+
 type exchangeCollector struct {
 	LDAPReadTime                            *prometheus.Desc
 	LDAPSearchTime                          *prometheus.Desc
@@ -69,16 +74,23 @@ var (
 		"RpcClientAccess",
 	}
 
-	argExchangeListAllCollectors = kingpin.Flag(
-		"collectors.exchange.list",
+	argExchangeListAllCollectors *bool
+
+	argExchangeCollectorsEnabled *string
+)
+
+// newExchangeCollectorFlags ...
+func newExchangeCollectorFlags(app *kingpin.Application) {
+	argExchangeListAllCollectors = app.Flag(
+		FlagExchangeListAllCollectors,
 		"List the collectors along with their perflib object name/ids",
 	).Bool()
 
-	argExchangeCollectorsEnabled = kingpin.Flag(
-		"collectors.exchange.enabled",
+	argExchangeCollectorsEnabled = app.Flag(
+		FlagExchangeCollectorsEnabled,
 		"Comma-separated list of collectors to use. Defaults to all, if not specified.",
 	).Default("").String()
-)
+}
 
 // newExchangeCollector returns a new Collector
 func newExchangeCollector() (Collector, error) {

collector/iis.go

@@ -13,11 +13,18 @@ import (
 	"golang.org/x/sys/windows/registry"
 )
 
+const (
+	FlagISSSiteBlacklist = "collector.iis.site-blacklist"
+	FlagISSSiteWhitelist = "collector.iis.site-whitelist"
+	FlagISSAppBlacklist  = "collector.iis.app-blacklist"
+	FlagISSAppWhitelist  = "collector.iis.app-whitelist"
+)
+
 var (
-	siteWhitelist = kingpin.Flag("collector.iis.site-whitelist", "Regexp of sites to whitelist. Site name must both match whitelist and not match blacklist to be included.").Default(".+").String()
-	siteBlacklist = kingpin.Flag("collector.iis.site-blacklist", "Regexp of sites to blacklist. Site name must both match whitelist and not match blacklist to be included.").String()
-	appWhitelist  = kingpin.Flag("collector.iis.app-whitelist", "Regexp of apps to whitelist. App name must both match whitelist and not match blacklist to be included.").Default(".+").String()
-	appBlacklist  = kingpin.Flag("collector.iis.app-blacklist", "Regexp of apps to blacklist. App name must both match whitelist and not match blacklist to be included.").String()
+	siteWhitelist *string
+	siteBlacklist *string
+	appWhitelist  *string
+	appBlacklist  *string
 )
 
 type simple_version struct {
@@ -191,6 +198,13 @@ type IISCollector struct {
 	iis_version simple_version
 }
 
+func newIISCollectorFlags(app *kingpin.Application) {
+	siteWhitelist = kingpin.Flag(FlagISSSiteWhitelist, "Regexp of sites to whitelist. Site name must both match whitelist and not match blacklist to be included.").Default(".+").String()
+	siteBlacklist = kingpin.Flag(FlagISSSiteBlacklist, "Regexp of sites to blacklist. Site name must both match whitelist and not match blacklist to be included.").String()
+	appWhitelist = kingpin.Flag(FlagISSAppWhitelist, "Regexp of apps to whitelist. App name must both match whitelist and not match blacklist to be included.").Default(".+").String()
+	appBlacklist = kingpin.Flag(FlagISSAppBlacklist, "Regexp of apps to blacklist. App name must both match whitelist and not match blacklist to be included.").String()
+}
+
 func newIISCollector() (Collector, error) {
 	const subsystem = "iis"
 

collector/init.go

@@ -1,23 +1,18 @@
 package collector
 
+import "github.com/alecthomas/kingpin/v2"
+
 // collectorInit represents the required initialisation config for a collector.
 type collectorInit struct {
 	// Name of collector to be initialised
 	name string
 	// Builder function for the collector
+	flags flagsBuilder
+	// Builder function for the collector
 	builder collectorBuilder
 	// Perflib counter names for the collector.
 	// These will be included in the Perflib scrape scope by the exporter.
-	perfCounterNames []string
-}
-
-func getCPUCollectorDeps() string {
-	// See below for 6.05 magic value
-	if getWindowsVersion() > 6.05 {
-		return "Processor Information"
-	}
-	return "Processor"
-
+	perfCounterFunc perfCounterNamesBuilder
 }
 
 func getDFSRCollectorDeps() []string {
@@ -32,278 +27,381 @@ func getDFSRCollectorDeps() []string {
 
 var collectors = []collectorInit{
 	{
-		name:             "ad",
-		builder:          newADCollector,
-		perfCounterNames: nil,
+		name:            "ad",
+		flags:           nil,
+		builder:         newADCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "adcs",
-		builder:          adcsCollectorMethod,
-		perfCounterNames: []string{"Certification Authority"},
+		name:    "adcs",
+		flags:   nil,
+		builder: adcsCollectorMethod,
+		perfCounterFunc: func() []string {
+			return []string{"Certification Authority"}
+		},
 	},
 	{
-		name:             "adfs",
-		builder:          newADFSCollector,
-		perfCounterNames: []string{"AD FS"},
+		name:    "adfs",
+		flags:   nil,
+		builder: newADFSCollector,
+		perfCounterFunc: func() []string {
+			return []string{"AD FS"}
+		},
 	},
 	{
-		name:             "cache",
-		builder:          newCacheCollector,
-		perfCounterNames: []string{"Cache"},
+		name:    "cache",
+		flags:   nil,
+		builder: newCacheCollector,
+		perfCounterFunc: func() []string {
+			return []string{"Cache"}
+		},
 	},
 	{
-		name:             "container",
-		builder:          newContainerMetricsCollector,
-		perfCounterNames: nil,
+		name:            "container",
+		flags:           nil,
+		builder:         newContainerMetricsCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "cpu",
-		builder:          newCPUCollector,
-		perfCounterNames: []string{getCPUCollectorDeps()},
+		name:    "cpu",
+		flags:   nil,
+		builder: newCPUCollector,
+		perfCounterFunc: func() []string {
+			if getWindowsVersion() > 6.05 {
+				return []string{"Processor Information"}
+			}
+			return []string{"Processor"}
+		},
 	},
 	{
-		name:             "cpu_info",
-		builder:          newCpuInfoCollector,
-		perfCounterNames: nil,
+		name:            "cpu_info",
+		flags:           nil,
+		builder:         newCpuInfoCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "cs",
-		builder:          newCSCollector,
-		perfCounterNames: nil,
+		name:            "cs",
+		flags:           nil,
+		builder:         newCSCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "dfsr",
-		builder:          newDFSRCollector,
-		perfCounterNames: getDFSRCollectorDeps(),
+		name:            "dfsr",
+		flags:           newDFSRCollectorFlags,
+		builder:         newDFSRCollector,
+		perfCounterFunc: getDFSRCollectorDeps,
 	},
 	{
-		name:             "dhcp",
-		builder:          newDhcpCollector,
-		perfCounterNames: nil,
+		name:            "dhcp",
+		flags:           nil,
+		builder:         newDhcpCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "diskdrive",
-		builder:          newDiskDriveInfoCollector,
-		perfCounterNames: nil,
+		name:            "diskdrive",
+		flags:           nil,
+		builder:         newDiskDriveInfoCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "dns",
-		builder:          newDNSCollector,
-		perfCounterNames: nil,
+		name:            "dns",
+		flags:           nil,
+		builder:         newDNSCollector,
+		perfCounterFunc: nil,
 	},
 	{
 		name:    "exchange",
+		flags:   newExchangeCollectorFlags,
 		builder: newExchangeCollector,
-		perfCounterNames: []string{
-			"MSExchange ADAccess Processes",
-			"MSExchangeTransport Queues",
-			"MSExchange HttpProxy",
-			"MSExchange ActiveSync",
-			"MSExchange Availability Service",
-			"MSExchange OWA",
-			"MSExchangeAutodiscover",
-			"MSExchange WorkloadManagement Workloads",
-			"MSExchange RpcClientAccess",
+		perfCounterFunc: func() []string {
+			return []string{
+				"MSExchange ADAccess Processes",
+				"MSExchangeTransport Queues",
+				"MSExchange HttpProxy",
+				"MSExchange ActiveSync",
+				"MSExchange Availability Service",
+				"MSExchange OWA",
+				"MSExchangeAutodiscover",
+				"MSExchange WorkloadManagement Workloads",
+				"MSExchange RpcClientAccess",
+			}
 		},
 	},
 	{
-		name:             "fsrmquota",
-		builder:          newFSRMQuotaCollector,
-		perfCounterNames: nil,
+		name:            "fsrmquota",
+		flags:           nil,
+		builder:         newFSRMQuotaCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "hyperv",
-		builder:          newHyperVCollector,
-		perfCounterNames: nil,
+		name:            "hyperv",
+		flags:           nil,
+		builder:         newHyperVCollector,
+		perfCounterFunc: nil,
 	},
 	{
 		name:    "iis",
+		flags:   newIISCollectorFlags,
 		builder: newIISCollector,
-		perfCounterNames: []string{"Web Service",
-			"APP_POOL_WAS",
-			"Web Service Cache",
-			"W3SVC_W3WP",
+		perfCounterFunc: func() []string {
+			return []string{
+				"Web Service",
+				"APP_POOL_WAS",
+				"Web Service Cache",
+				"W3SVC_W3WP",
+			}
 		},
 	},
 	{
-		name:             "logical_disk",
-		builder:          newLogicalDiskCollector,
-		perfCounterNames: []string{"LogicalDisk"},
+		name:    "logical_disk",
+		flags:   newLogicalDiskCollectorFlags,
+		builder: newLogicalDiskCollector,
+		perfCounterFunc: func() []string {
+			return []string{"LogicalDisk"}
+		},
 	},
 	{
-		name:             "logon",
-		builder:          newLogonCollector,
-		perfCounterNames: nil,
+		name:            "logon",
+		flags:           nil,
+		builder:         newLogonCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "memory",
-		builder:          newMemoryCollector,
-		perfCounterNames: []string{"Memory"},
+		name:    "memory",
+		flags:   nil,
+		builder: newMemoryCollector,
+		perfCounterFunc: func() []string {
+			return []string{"Memory"}
+		},
 	},
 	{
-		name:             "mscluster_cluster",
-		builder:          newMSCluster_ClusterCollector,
-		perfCounterNames: nil,
+		name:            "mscluster_cluster",
+		flags:           nil,
+		builder:         newMSCluster_ClusterCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "mscluster_network",
-		builder:          newMSCluster_NetworkCollector,
-		perfCounterNames: nil,
+		name:            "mscluster_network",
+		flags:           nil,
+		builder:         newMSCluster_NetworkCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "mscluster_node",
-		builder:          newMSCluster_NodeCollector,
-		perfCounterNames: nil,
+		name:            "mscluster_node",
+		flags:           nil,
+		builder:         newMSCluster_NodeCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "mscluster_resource",
-		builder:          newMSCluster_ResourceCollector,
-		perfCounterNames: nil,
+		name:            "mscluster_resource",
+		flags:           nil,
+		builder:         newMSCluster_ResourceCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "mscluster_resourcegroup",
-		builder:          newMSCluster_ResourceGroupCollector,
-		perfCounterNames: nil,
+		name:            "mscluster_resourcegroup",
+		flags:           nil,
+		builder:         newMSCluster_ResourceGroupCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "msmq",
-		builder:          newMSMQCollector,
-		perfCounterNames: nil,
+		name:            "msmq",
+		flags:           newMSMQCollectorFlags,
+		builder:         newMSMQCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "mssql",
-		builder:          newMSSQLCollector,
-		perfCounterNames: nil,
+		name:            "mssql",
+		flags:           newMSSQLCollectorFlags,
+		builder:         newMSSQLCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "net",
-		builder:          newNetworkCollector,
-		perfCounterNames: []string{"Network Interface"},
+		name:    "net",
+		flags:   newNetworkCollectorFlags,
+		builder: newNetworkCollector,
+		perfCounterFunc: func() []string {
+			return []string{"Network Interface"}
+		},
 	},
 	{
-		name:             "netframework_clrexceptions",
-		builder:          newNETFramework_NETCLRExceptionsCollector,
-		perfCounterNames: nil,
+		name:            "netframework_clrexceptions",
+		flags:           nil,
+		builder:         newNETFramework_NETCLRExceptionsCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "netframework_clrinterop",
-		builder:          newNETFramework_NETCLRInteropCollector,
-		perfCounterNames: nil,
+		name:            "netframework_clrinterop",
+		flags:           nil,
+		builder:         newNETFramework_NETCLRInteropCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "netframework_clrjit",
-		builder:          newNETFramework_NETCLRJitCollector,
-		perfCounterNames: nil,
+		name:            "netframework_clrjit",
+		flags:           nil,
+		builder:         newNETFramework_NETCLRJitCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "netframework_clrloading",
-		builder:          newNETFramework_NETCLRLoadingCollector,
-		perfCounterNames: nil,
+		name:            "netframework_clrloading",
+		flags:           nil,
+		builder:         newNETFramework_NETCLRLoadingCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "netframework_clrlocksandthreads",
-		builder:          newNETFramework_NETCLRLocksAndThreadsCollector,
-		perfCounterNames: nil,
+		name:            "netframework_clrlocksandthreads",
+		flags:           nil,
+		builder:         newNETFramework_NETCLRLocksAndThreadsCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "netframework_clrmemory",
-		builder:          newNETFramework_NETCLRMemoryCollector,
-		perfCounterNames: nil,
+		name:            "netframework_clrmemory",
+		flags:           nil,
+		builder:         newNETFramework_NETCLRMemoryCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "netframework_clrremoting",
-		builder:          newNETFramework_NETCLRRemotingCollector,
-		perfCounterNames: nil,
+		name:            "netframework_clrremoting",
+		flags:           nil,
+		builder:         newNETFramework_NETCLRRemotingCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "netframework_clrsecurity",
-		builder:          newNETFramework_NETCLRSecurityCollector,
-		perfCounterNames: nil,
+		name:            "netframework_clrsecurity",
+		flags:           nil,
+		builder:         newNETFramework_NETCLRSecurityCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "os",
-		builder:          newOSCollector,
-		perfCounterNames: []string{"Paging File"},
+		name:    "os",
+		flags:   nil,
+		builder: newOSCollector,
+		perfCounterFunc: func() []string {
+			return []string{"Paging File"}
+		},
 	},
 	{
-		name:             "process",
-		builder:          newProcessCollector,
-		perfCounterNames: []string{"Process"},
+		name:    "process",
+		flags:   newProcessCollectorFlags,
+		builder: newProcessCollector,
+		perfCounterFunc: func() []string {
+			return []string{"Process"}
+		},
 	},
 	{
-		name:             "remote_fx",
-		builder:          newRemoteFx,
-		perfCounterNames: []string{"RemoteFX Network"},
+		name:    "remote_fx",
+		flags:   nil,
+		builder: newRemoteFx,
+		perfCounterFunc: func() []string {
+			return []string{"RemoteFX Network"}
+		},
 	},
 	{
-		name:             "scheduled_task",
-		builder:          newScheduledTask,
-		perfCounterNames: nil,
+		name:            "scheduled_task",
+		flags:           newScheduledTaskFlags,
+		builder:         newScheduledTask,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "service",
-		builder:          newserviceCollector,
-		perfCounterNames: nil,
+		name:            "service",
+		flags:           newServiceCollectorFlags,
+		builder:         newserviceCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "smtp",
-		builder:          newSMTPCollector,
-		perfCounterNames: []string{"SMTP Server"},
+		name:    "smtp",
+		flags:   newSMTPCollectorFlags,
+		builder: newSMTPCollector,
+		perfCounterFunc: func() []string {
+			return []string{"SMTP Server"}
+		},
 	},
 	{
-		name:             "system",
-		builder:          newSystemCollector,
-		perfCounterNames: []string{"System"},
+		name:    "system",
+		flags:   nil,
+		builder: newSystemCollector,
+		perfCounterFunc: func() []string {
+			return []string{"System"}
+		},
 	},
 	{
-		name:             "teradici_pcoip",
-		builder:          newTeradiciPcoipCollector,
-		perfCounterNames: nil,
+		name:            "teradici_pcoip",
+		flags:           nil,
+		builder:         newTeradiciPcoipCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "tcp",
-		builder:          newTCPCollector,
-		perfCounterNames: []string{"TCPv4"},
+		name:    "tcp",
+		flags:   nil,
+		builder: newTCPCollector,
+		perfCounterFunc: func() []string {
+			return []string{"TCPv4"}
+		},
 	},
 	{
 		name:    "terminal_services",
+		flags:   nil,
 		builder: newTerminalServicesCollector,
-		perfCounterNames: []string{
-			"Terminal Services",
-			"Terminal Services Session",
-			"Remote Desktop Connection Broker Counterset",
+		perfCounterFunc: func() []string {
+			return []string{
+				"Terminal Services",
+				"Terminal Services Session",
+				"Remote Desktop Connection Broker Counterset",
+			}
 		},
 	},
 	{
-		name:             "textfile",
-		builder:          newTextFileCollector,
-		perfCounterNames: nil,
+		name:            "textfile",
+		flags:           newTextFileCollectorFlags,
+		builder:         newTextFileCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "thermalzone",
-		builder:          newThermalZoneCollector,
-		perfCounterNames: nil,
+		name:            "thermalzone",
+		flags:           nil,
+		builder:         newThermalZoneCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "time",
-		builder:          newTimeCollector,
-		perfCounterNames: []string{"Windows Time Service"},
+		name:    "time",
+		flags:   nil,
+		builder: newTimeCollector,
+		perfCounterFunc: func() []string {
+			return []string{"Windows Time Service"}
+		},
 	},
 	{
-		name:             "vmware",
-		builder:          newVmwareCollector,
-		perfCounterNames: nil,
+		name:            "vmware",
+		flags:           nil,
+		builder:         newVmwareCollector,
+		perfCounterFunc: nil,
 	},
 	{
-		name:             "vmware_blast",
-		builder:          newVmwareBlastCollector,
-		perfCounterNames: nil,
+		name:            "vmware_blast",
+		flags:           nil,
+		builder:         newVmwareBlastCollector,
+		perfCounterFunc: nil,
 	},
 }
 
-// To be called by the exporter for collector initialisation
-func RegisterCollectors() {
+// RegisterCollectorsFlags To be called by the exporter for collector initialisation before running app.Parse
+func RegisterCollectorsFlags(app *kingpin.Application) {
 	for _, v := range collectors {
-		registerCollector(v.name, v.builder, v.perfCounterNames...)
+		if v.flags != nil {
+			v.flags(app)
+		}
+	}
+}
+
+// RegisterCollectors To be called by the exporter for collector initialisation
+func RegisterCollectors() {
+	for _, v := range collectors {
+		var perfCounterNames []string
+
+		if v.perfCounterFunc != nil {
+			perfCounterNames = v.perfCounterFunc()
+		}
+
+		registerCollector(v.name, v.builder, perfCounterNames...)
 	}
 }

collector/logical_disk.go

@@ -12,15 +12,14 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+const (
+	FlagLogicalDiskVolumeBlacklist = "collector.logical_disk.volume-blacklist"
+	FlagLogicalDiskVolumeWhitelist = "collector.logical_disk.volume-whitelist"
+)
+
 var (
-	volumeWhitelist = kingpin.Flag(
-		"collector.logical_disk.volume-whitelist",
-		"Regexp of volumes to whitelist. Volume name must both match whitelist and not match blacklist to be included.",
-	).Default(".+").String()
-	volumeBlacklist = kingpin.Flag(
-		"collector.logical_disk.volume-blacklist",
-		"Regexp of volumes to blacklist. Volume name must both match whitelist and not match blacklist to be included.",
-	).Default("").String()
+	volumeWhitelist *string
+	volumeBlacklist *string
 )
 
 // A LogicalDiskCollector is a Prometheus collector for perflib logicalDisk metrics
@@ -46,6 +45,18 @@ type LogicalDiskCollector struct {
 	volumeBlacklistPattern *regexp.Regexp
 }
 
+// newLogicalDiskCollectorFlags ...
+func newLogicalDiskCollectorFlags(app *kingpin.Application) {
+	volumeWhitelist = app.Flag(
+		FlagLogicalDiskVolumeWhitelist,
+		"Regexp of volumes to whitelist. Volume name must both match whitelist and not match blacklist to be included.",
+	).Default(".+").String()
+	volumeBlacklist = app.Flag(
+		FlagLogicalDiskVolumeBlacklist,
+		"Regexp of volumes to blacklist. Volume name must both match whitelist and not match blacklist to be included.",
+	).Default("").String()
+}
+
 // newLogicalDiskCollector ...
 func newLogicalDiskCollector() (Collector, error) {
 	const subsystem = "logical_disk"

collector/msmq.go

@@ -12,8 +12,12 @@ import (
 	"github.com/yusufpapurcu/wmi"
 )
 
+const (
+	FlagMsmqWhereClause = "collector.msmq.msmq-where"
+)
+
 var (
-	msmqWhereClause = kingpin.Flag("collector.msmq.msmq-where", "WQL 'where' clause to use in WMI metrics query. Limits the response to the msmqs you specify and reduces the size of the response.").String()
+	msmqWhereClause *string
 )
 
 // A Win32_PerfRawData_MSMQ_MSMQQueueCollector is a Prometheus collector for WMI Win32_PerfRawData_MSMQ_MSMQQueue metrics
@@ -26,6 +30,11 @@ type Win32_PerfRawData_MSMQ_MSMQQueueCollector struct {
 	queryWhereClause string
 }
 
+// newMSMQCollectorFlags ..
+func newMSMQCollectorFlags(app *kingpin.Application) {
+	msmqWhereClause = app.Flag(FlagMsmqWhereClause, "WQL 'where' clause to use in WMI metrics query. Limits the response to the msmqs you specify and reduces the size of the response.").String()
+}
+
 // NewWin32_PerfRawData_MSMQ_MSMQQueueCollector ...
 func newMSMQCollector() (Collector, error) {
 	const subsystem = "msmq"

collector/mssql.go

@@ -17,16 +17,15 @@ import (
 	"golang.org/x/sys/windows/registry"
 )
 
-var (
-	mssqlEnabledCollectors = kingpin.Flag(
-		"collectors.mssql.classes-enabled",
-		"Comma-separated list of mssql WMI classes to use.").
-		Default(mssqlAvailableClassCollectors()).String()
+const (
+	FlagMssqlEnabledCollectors = "collectors.mssql.classes-enabled"
+	FlagMssqlPrintCollectors   = "collectors.mssql.class-print"
+)
 
-	mssqlPrintCollectors = kingpin.Flag(
-		"collectors.mssql.class-print",
-		"If true, print available mssql WMI classes and exit.  Only displays if the mssql collector is enabled.",
-	).Bool()
+var (
+	mssqlEnabledCollectors *string
+
+	mssqlPrintCollectors *bool
 )
 
 type mssqlInstancesType map[string]string
@@ -401,6 +400,19 @@ type MSSQLCollector struct {
 	mssqlChildCollectorFailure int
 }
 
+// newMSSQLCollectorFlags ...
+func newMSSQLCollectorFlags(app *kingpin.Application) {
+	mssqlEnabledCollectors = app.Flag(
+		FlagMssqlEnabledCollectors,
+		"Comma-separated list of mssql WMI classes to use.").
+		Default(mssqlAvailableClassCollectors()).String()
+
+	mssqlPrintCollectors = app.Flag(
+		FlagMssqlPrintCollectors,
+		"If true, print available mssql WMI classes and exit.  Only displays if the mssql collector is enabled.",
+	).Bool()
+}
+
 // newMSSQLCollector ...
 func newMSSQLCollector() (Collector, error) {
 

collector/net.go

@@ -12,15 +12,14 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+const (
+	FlagNicBlacklist = "collector.net.nic-blacklist"
+	FlagNicWhitelist = "collector.net.nic-whitelist"
+)
+
 var (
-	nicWhitelist = kingpin.Flag(
-		"collector.net.nic-whitelist",
-		"Regexp of NIC:s to whitelist. NIC name must both match whitelist and not match blacklist to be included.",
-	).Default(".+").String()
-	nicBlacklist = kingpin.Flag(
-		"collector.net.nic-blacklist",
-		"Regexp of NIC:s to blacklist. NIC name must both match whitelist and not match blacklist to be included.",
-	).Default("").String()
+	nicWhitelist        *string
+	nicBlacklist        *string
 	nicNameToUnderscore = regexp.MustCompile("[^a-zA-Z0-9]")
 )
 
@@ -44,6 +43,18 @@ type NetworkCollector struct {
 	nicBlacklistPattern *regexp.Regexp
 }
 
+// newNetworkCollectorFlags ...
+func newNetworkCollectorFlags(app *kingpin.Application) {
+	nicWhitelist = app.Flag(
+		FlagNicWhitelist,
+		"Regexp of NIC:s to whitelist. NIC name must both match whitelist and not match blacklist to be included.",
+	).Default(".+").String()
+	nicBlacklist = app.Flag(
+		FlagNicBlacklist,
+		"Regexp of NIC:s to blacklist. NIC name must both match whitelist and not match blacklist to be included.",
+	).Default("").String()
+}
+
 // newNetworkCollector ...
 func newNetworkCollector() (Collector, error) {
 	const subsystem = "net"

collector/process.go

@@ -15,15 +15,14 @@ import (
 	"github.com/yusufpapurcu/wmi"
 )
 
+const (
+	FlagProcessBlacklist = "collector.process.blacklist"
+	FlagProcessWhitelist = "collector.process.whitelist"
+)
+
 var (
-	processWhitelist = kingpin.Flag(
-		"collector.process.whitelist",
-		"Regexp of processes to include. Process name must both match whitelist and not match blacklist to be included.",
-	).Default(".*").String()
-	processBlacklist = kingpin.Flag(
-		"collector.process.blacklist",
-		"Regexp of processes to exclude. Process name must both match whitelist and not match blacklist to be included.",
-	).Default("").String()
+	processWhitelist *string
+	processBlacklist *string
 )
 
 type processCollector struct {
@@ -47,6 +46,18 @@ type processCollector struct {
 	processBlacklistPattern *regexp.Regexp
 }
 
+// newProcessCollectorFlags ...
+func newProcessCollectorFlags(app *kingpin.Application) {
+	processWhitelist = app.Flag(
+		FlagProcessWhitelist,
+		"Regexp of processes to include. Process name must both match whitelist and not match blacklist to be included.",
+	).Default(".*").String()
+	processBlacklist = app.Flag(
+		FlagProcessBlacklist,
+		"Regexp of processes to exclude. Process name must both match whitelist and not match blacklist to be included.",
+	).Default("").String()
+}
+
 // NewProcessCollector ...
 func newProcessCollector() (Collector, error) {
 	const subsystem = "process"

collector/scheduled_task.go

@@ -16,15 +16,14 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+const (
+	FlagScheduledTaskBlacklist = "collector.scheduled_task.blacklist"
+	FlagScheduledTaskWhitelist = "collector.scheduled_task.whitelist"
+)
+
 var (
-	taskWhitelist = kingpin.Flag(
-		"collector.scheduled_task.whitelist",
-		"Regexp of tasks to whitelist. Task path must both match whitelist and not match blacklist to be included.",
-	).Default(".+").String()
-	taskBlacklist = kingpin.Flag(
-		"collector.scheduled_task.blacklist",
-		"Regexp of tasks to blacklist. Task path must both match whitelist and not match blacklist to be included.",
-	).String()
+	taskWhitelist *string
+	taskBlacklist *string
 )
 
 type ScheduledTaskCollector struct {
@@ -63,6 +62,18 @@ type ScheduledTask struct {
 
 type ScheduledTasks []ScheduledTask
 
+// newScheduledTask ...
+func newScheduledTaskFlags(app *kingpin.Application) {
+	taskWhitelist = app.Flag(
+		FlagScheduledTaskWhitelist,
+		"Regexp of tasks to whitelist. Task path must both match whitelist and not match blacklist to be included.",
+	).Default(".+").String()
+	taskBlacklist = app.Flag(
+		FlagScheduledTaskBlacklist,
+		"Regexp of tasks to blacklist. Task path must both match whitelist and not match blacklist to be included.",
+	).String()
+}
+
 // newScheduledTask ...
 func newScheduledTask() (Collector, error) {
 	const subsystem = "scheduled_task"

collector/service.go

@@ -16,15 +16,14 @@ import (
 	"golang.org/x/sys/windows/svc/mgr"
 )
 
+const (
+	FlagServiceWhereClause = "collector.service.services-where"
+	FlagServiceUseAPI      = "collector.service.use-api"
+)
+
 var (
-	serviceWhereClause = kingpin.Flag(
-		"collector.service.services-where",
-		"WQL 'where' clause to use in WMI metrics query. Limits the response to the services you specify and reduces the size of the response.",
-	).Default("").String()
-	useAPI = kingpin.Flag(
-		"collector.service.use-api",
-		"Use API calls to collect service data instead of WMI. Flag 'collector.service.services-where' won't be effective.",
-	).Default("false").Bool()
+	serviceWhereClause *string
+	useAPI             *bool
 )
 
 // A serviceCollector is a Prometheus collector for WMI Win32_Service metrics
@@ -37,6 +36,18 @@ type serviceCollector struct {
 	queryWhereClause string
 }
 
+// newServiceCollectorFlags ...
+func newServiceCollectorFlags(app *kingpin.Application) {
+	serviceWhereClause = app.Flag(
+		FlagServiceWhereClause,
+		"WQL 'where' clause to use in WMI metrics query. Limits the response to the services you specify and reduces the size of the response.",
+	).Default("").String()
+	useAPI = app.Flag(
+		FlagServiceUseAPI,
+		"Use API calls to collect service data instead of WMI. Flag 'collector.service.services-where' won't be effective.",
+	).Default("false").Bool()
+}
+
 // newserviceCollector ...
 func newserviceCollector() (Collector, error) {
 	const subsystem = "service"

collector/smtp.go

@@ -11,9 +11,14 @@ import (
 	"regexp"
 )
 
+const (
+	FlagSmtpServerBlacklist = "collector.smtp.server-blacklist"
+	FlagSmtpServerWhitelist = "collector.smtp.server-whitelist"
+)
+
 var (
-	serverWhitelist = kingpin.Flag("collector.smtp.server-whitelist", "Regexp of virtual servers to whitelist. Server name must both match whitelist and not match blacklist to be included.").Default(".+").String()
-	serverBlacklist = kingpin.Flag("collector.smtp.server-blacklist", "Regexp of virtual servers to blacklist. Server name must both match whitelist and not match blacklist to be included.").String()
+	serverWhitelist *string
+	serverBlacklist *string
 )
 
 type SMTPCollector struct {
@@ -64,6 +69,11 @@ type SMTPCollector struct {
 	serverBlacklistPattern *regexp.Regexp
 }
 
+func newSMTPCollectorFlags(app *kingpin.Application) {
+	serverWhitelist = app.Flag(FlagSmtpServerWhitelist, "Regexp of virtual servers to whitelist. Server name must both match whitelist and not match blacklist to be included.").Default(".+").String()
+	serverBlacklist = app.Flag(FlagSmtpServerBlacklist, "Regexp of virtual servers to blacklist. Server name must both match whitelist and not match blacklist to be included.").String()
+}
+
 func newSMTPCollector() (Collector, error) {
 	log.Info("smtp collector is in an experimental state! Metrics for this collector have not been tested.")
 	const subsystem = "smtp"

collector/textfile.go

@@ -35,11 +35,12 @@ import (
 	"github.com/prometheus/common/expfmt"
 )
 
+const (
+	FlagTextFileDirectory = "collector.textfile.directory"
+)
+
 var (
-	textFileDirectory = kingpin.Flag(
-		"collector.textfile.directory",
-		"Directory to read text files with metrics from.",
-	).Default(getDefaultPath()).String()
+	textFileDirectory *string
 
 	mtimeDesc = prometheus.NewDesc(
 		prometheus.BuildFQName(Namespace, "textfile", "mtime_seconds"),
@@ -55,6 +56,14 @@ type textFileCollector struct {
 	mtime *float64
 }
 
+// newTextFileCollectorFlags ...
+func newTextFileCollectorFlags(app *kingpin.Application) {
+	textFileDirectory = app.Flag(
+		FlagTextFileDirectory,
+		"Directory to read text files with metrics from.",
+	).Default(getDefaultPath()).String()
+}
+
 // newTextFileCollector returns a new Collector exposing metrics read from files
 // in the given textfile directory.
 func newTextFileCollector() (Collector, error) {

exporter.go

@@ -259,51 +259,55 @@ func initWbem() {
 }
 
 func main() {
+	app := kingpin.New("windows_exporter", "A metrics collector for Windows.")
 	var (
-		configFile = kingpin.Flag(
+		configFile = app.Flag(
 			"config.file",
 			"YAML configuration file to use. Values set in this file will be overridden by CLI flags.",
 		).String()
-		webConfig   = webflag.AddFlags(kingpin.CommandLine, ":9182")
-		metricsPath = kingpin.Flag(
+		webConfig   = webflag.AddFlags(app, ":9182")
+		metricsPath = app.Flag(
 			"telemetry.path",
 			"URL path for surfacing collected metrics.",
 		).Default("/metrics").String()
-		disableExporterMetrics = kingpin.Flag(
+		disableExporterMetrics = app.Flag(
 			"web.disable-exporter-metrics",
 			"Exclude metrics about the exporter itself (promhttp_*, process_*, go_*).",
 		).Bool()
-		maxRequests = kingpin.Flag(
+		maxRequests = app.Flag(
 			"telemetry.max-requests",
 			"Maximum number of concurrent requests. 0 to disable.",
 		).Default("5").Int()
-		enabledCollectors = kingpin.Flag(
+		enabledCollectors = app.Flag(
 			"collectors.enabled",
 			"Comma-separated list of collectors to use. Use '[defaults]' as a placeholder for all the collectors enabled by default.").
 			Default(defaultCollectors).String()
-		printCollectors = kingpin.Flag(
+		printCollectors = app.Flag(
 			"collectors.print",
 			"If true, print available collectors and exit.",
 		).Bool()
-		timeoutMargin = kingpin.Flag(
+		timeoutMargin = app.Flag(
 			"scrape.timeout-margin",
 			"Seconds to subtract from the timeout allowed by the client. Tune to allow for overhead or high loads.",
 		).Default("0.5").Float64()
 	)
-	log.AddFlags(kingpin.CommandLine)
-	kingpin.Version(version.Print("windows_exporter"))
-	kingpin.HelpFlag.Short('h')
+	log.AddFlags(app)
+	app.Version(version.Print("windows_exporter"))
+	app.HelpFlag.Short('h')
+
+	// Initialize collectors before loading and parsing CLI arguments
+	collector.RegisterCollectorsFlags(app)
 
 	// Load values from configuration file(s). Executable flags must first be parsed, in order
 	// to load the specified file(s).
-	kingpin.Parse()
+	kingpin.MustParse(app.Parse(os.Args[1:]))
 	log.Debug("Logging has Started")
 	if *configFile != "" {
 		resolver, err := config.NewResolver(*configFile)
 		if err != nil {
 			log.Fatalf("could not load config file: %v\n", err)
 		}
-		err = resolver.Bind(kingpin.CommandLine, os.Args[1:])
+		err = resolver.Bind(app, os.Args[1:])
 		if err != nil {
 			log.Fatalf("%v\n", err)
 		}
@@ -314,7 +318,7 @@ func main() {
 		*webConfig.WebListenAddresses = (*webConfig.WebListenAddresses)[1:]
 
 		// Parse flags once more to include those discovered in configuration file(s).
-		kingpin.Parse()
+		kingpin.MustParse(app.Parse(os.Args[1:]))
 	}
 
 	if *printCollectors {