enable staticcheck linter; fixes (#1806)

- explicitly ignore returned parameters
 - replace Walk with faster WalkDir
 - log path error during hub dir sync
 - colorize static unit tests
 - removed duplicate import in crowdsec/main.go
 - typos
 - func tests: default datasource in tests/var/log instead of /tmp
 - action setup-go v3

.github/workflows/ci-windows-build-msi.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: windows-2019
     steps:
     - name: Set up Go 1.19
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v3
       with:
         go-version: 1.19
       id: go

.github/workflows/ci_golangci-lint.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Set up Go 1.19
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v3
         with:
           go-version: 1.19
         id: go

.github/workflows/go-tests.yml

@@ -132,7 +132,9 @@ jobs:
 
     - name: Build and run tests (static)
       run: |
-        make clean build test BUILD_STATIC=yes
+        make clean build BUILD_STATIC=yes
+        make test \
+          | richgo testfilter
 
     - name: Upload unit coverage to Codecov
       uses: codecov/codecov-action@v2

.github/workflows/release_publish-package.yml

@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Set up Go 1.19
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v3
       with:
         go-version: 1.19
       id: go

.golangci.yml

@@ -5,6 +5,7 @@ run:
     - pkg/time/rate
   skip-files:
     - pkg/database/ent/generate.go
+    - pkg/yamlpatch/merge_test.go
 
 linters-settings:
   gocyclo:
@@ -97,7 +98,6 @@ linters:
     - errchkjson            # Checks types passed to the json encoding functions. Reports unsupported types and optionally reports occations, where the check for the returned error can be omitted.
     - errorlint             # errorlint is a linter for that can be used to find code that will cause problems with the error wrapping scheme introduced in Go 1.13.
     - exhaustive            # check exhaustiveness of enum switch statements
-    - forcetypeassert       # finds forced type assertions
     - gci                   # Gci control golang package import order and make it always deterministic.
     - gocritic              # Provides diagnostics that check for bugs, performance and style issues.
     - godot                 # Check if comments end in a period
@@ -143,6 +143,7 @@ linters:
     #
     - cyclop                # checks function and package cyclomatic complexity
     - dupl                  # Tool for code clone detection
+    - forcetypeassert       # finds forced type assertions
     - gocognit              # Computes and checks the cognitive complexity of functions
     - gocyclo               # Computes and checks the cyclomatic complexity of functions
     - godox                 # Tool for detection of FIXME, TODO and other comment keywords
@@ -189,20 +190,3 @@ issues:
     - linters:
         - errcheck
       text: "Error return value of `.*` is not checked"
-
-    #
-    # staticcheck
-    #
-
-    - linters:
-        - staticcheck
-      text: "SA4009: argument .* is overwritten before first use"
-    - linters:
-        - staticcheck
-      text: "SA4009.related information.: assignment to .*"
-    - linters:
-        - staticcheck
-      text: "SA4006: this value of .* is never used"
-    - linters:
-        - staticcheck
-      text: "SA1006: printf-style function with dynamic format string and no further arguments should use print-style function instead"

cmd/crowdsec/main.go

@@ -3,29 +3,26 @@ package main
 import (
 	"flag"
 	"fmt"
+	_ "net/http/pprof"
 	"os"
 	"runtime"
 	"sort"
 	"strings"
-
-	_ "net/http/pprof"
 	"time"
 
 	"github.com/confluentinc/bincover"
+	"github.com/pkg/errors"
+	log "github.com/sirupsen/logrus"
+	"gopkg.in/tomb.v2"
+
 	"github.com/crowdsecurity/crowdsec/pkg/acquisition"
 	"github.com/crowdsecurity/crowdsec/pkg/csconfig"
 	"github.com/crowdsecurity/crowdsec/pkg/csplugin"
 	"github.com/crowdsecurity/crowdsec/pkg/cwhub"
 	"github.com/crowdsecurity/crowdsec/pkg/cwversion"
 	"github.com/crowdsecurity/crowdsec/pkg/leakybucket"
-	leaky "github.com/crowdsecurity/crowdsec/pkg/leakybucket"
 	"github.com/crowdsecurity/crowdsec/pkg/parser"
 	"github.com/crowdsecurity/crowdsec/pkg/types"
-	"github.com/pkg/errors"
-
-	log "github.com/sirupsen/logrus"
-
-	"gopkg.in/tomb.v2"
 )
 
 var (
@@ -43,8 +40,8 @@ var (
 	/*the state of acquisition*/
 	dataSources []acquisition.DataSource
 	/*the state of the buckets*/
-	holders         []leaky.BucketFactory
-	buckets         *leaky.Buckets
+	holders         []leakybucket.BucketFactory
+	buckets         *leakybucket.Buckets
 	outputEventChan chan types.Event //the buckets init returns its own chan that is used for multiplexing
 	/*settings*/
 	lastProcessedItem time.Time /*keep track of last item timestamp in time-machine. it is used to GC buckets when we dump them.*/
@@ -122,13 +119,13 @@ func LoadBuckets(cConfig *csconfig.Config) error {
 			files = append(files, hubScenarioItem.LocalPath)
 		}
 	}
-	buckets = leaky.NewBuckets()
+	buckets = leakybucket.NewBuckets()
 
 	log.Infof("Loading %d scenario files", len(files))
-	holders, outputEventChan, err = leaky.LoadBuckets(cConfig.Crowdsec, files, &bucketsTomb, buckets)
+	holders, outputEventChan, err = leakybucket.LoadBuckets(cConfig.Crowdsec, files, &bucketsTomb, buckets)
 
 	if err != nil {
-		return fmt.Errorf("Scenario loading failed : %v", err)
+		return fmt.Errorf("scenario loading failed: %v", err)
 	}
 
 	if cConfig.Prometheus != nil && cConfig.Prometheus.Enabled {

cmd/crowdsec/metrics.go

@@ -152,8 +152,8 @@ func registerPrometheus(config *csconfig.PrometheusCfg) {
 		config.ListenPort = 6060
 	}
 
-	/*Registering prometheus*/
-	/*If in aggregated mode, do not register events associated to a source, keeps cardinality low*/
+	// Registering prometheus
+	// If in aggregated mode, do not register events associated with a source, to keep the cardinality low
 	if config.Level == "aggregated" {
 		log.Infof("Loading aggregated prometheus collectors")
 		prometheus.MustRegister(globalParserHits, globalParserHitsOk, globalParserHitsKo,

cmd/crowdsec/serve.go

@@ -32,14 +32,13 @@ func debugHandler(sig os.Signal, cConfig *csconfig.Config) error {
 
 	// todo: properly stop acquis with the tail readers
 	if tmpFile, err = leaky.DumpBucketsStateAt(time.Now().UTC(), cConfig.Crowdsec.BucketStateDumpDir, buckets); err != nil {
-		log.Warningf("Failed dumping bucket state : %s", err)
+		log.Warningf("Failed to dump bucket state : %s", err)
 	}
 
 	if err := leaky.ShutdownAllBuckets(buckets); err != nil {
-		log.Warningf("while shutting down routines : %s", err)
+		log.Warningf("Failed to shut down routines : %s", err)
 	}
-
-	log.Printf("shutdown is finished buckets are in %s", tmpFile)
+	log.Printf("Shutdown is finished, buckets are in %s", tmpFile)
 	return nil
 }
 

pkg/apiclient/alerts_service_test.go

@@ -399,7 +399,7 @@ func TestAlertsGetAsMachine(t *testing.T) {
 	}
 
 	//fail
-	_, resp, err = client.Alerts.GetByID(context.Background(), 2)
+	_, _, err = client.Alerts.GetByID(context.Background(), 2)
 	assert.Contains(t, fmt.Sprintf("%s", err), "API error: object not found")
 
 }

pkg/apiclient/auth_test.go

@@ -77,7 +77,7 @@ func TestApiAuth(t *testing.T) {
 		t.Fatalf("new api client: %s", err)
 	}
 
-	_, resp, err = newcli.Decisions.List(context.Background(), alert)
+	_, _, err = newcli.Decisions.List(context.Background(), alert)
 	require.Error(t, err)
 
 	log.Infof("--> %s", err)

pkg/apiserver/controllers/v1/alerts.go

@@ -112,13 +112,13 @@ func (c *Controller) sendAlertToPluginChannel(alert *models.Alert, profileID uin
 	}
 }
 
-// CreateAlert : write received alerts in body to the database
+// CreateAlert writes the alerts received in the body to the database
 func (c *Controller) CreateAlert(gctx *gin.Context) {
 
 	var input models.AddAlertsRequest
 
 	claims := jwt.ExtractClaims(gctx)
-	/*TBD : use defines rather than hardcoded key to find back owner*/
+	// TBD: use defined rather than hardcoded key to find back owner
 	machineID := claims["id"].(string)
 
 	if err := gctx.ShouldBindJSON(&input); err != nil {
@@ -200,7 +200,7 @@ func (c *Controller) CreateAlert(gctx *gin.Context) {
 	gctx.JSON(http.StatusCreated, alerts)
 }
 
-// FindAlerts : return alerts from database based on the specified filter
+// FindAlerts: returns alerts from the database based on the specified filter
 func (c *Controller) FindAlerts(gctx *gin.Context) {
 	result, err := c.DBClient.QueryAlertWithFilter(gctx.Request.URL.Query())
 	if err != nil {
@@ -217,7 +217,7 @@ func (c *Controller) FindAlerts(gctx *gin.Context) {
 	gctx.JSON(http.StatusOK, data)
 }
 
-// FindAlertByID return the alert associated to the ID
+// FindAlertByID returns the alert associated with the ID
 func (c *Controller) FindAlertByID(gctx *gin.Context) {
 	alertIDStr := gctx.Param("alert_id")
 	alertID, err := strconv.Atoi(alertIDStr)
@@ -239,7 +239,7 @@ func (c *Controller) FindAlertByID(gctx *gin.Context) {
 	gctx.JSON(http.StatusOK, data)
 }
 
-// DeleteAlerts : delete alerts from database based on the specified filter
+// DeleteAlerts deletes alerts from the database based on the specified filter
 func (c *Controller) DeleteAlerts(gctx *gin.Context) {
 	incomingIP := gctx.ClientIP()
 	if incomingIP != "127.0.0.1" && incomingIP != "::1" && !networksContainIP(c.TrustedIPs, incomingIP) {

pkg/apiserver/controllers/v1/heartbeat.go

@@ -10,7 +10,7 @@ import (
 func (c *Controller) HeartBeat(gctx *gin.Context) {
 
 	claims := jwt.ExtractClaims(gctx)
-	/*TBD : use defines rather than hardcoded key to find back owner*/
+	// TBD: use defined rather than hardcoded key to find back owner
 	machineID := claims["id"].(string)
 
 	if err := c.DBClient.UpdateMachineLastHeartBeat(machineID); err != nil {

pkg/cstest/hubtest_item.go

@@ -552,7 +552,7 @@ func (t *HubTestItem) Run() error {
 
 	// assert parsers
 	if !t.Config.IgnoreParsers {
-		assertFileStat, err := os.Stat(t.ParserAssert.File)
+		_, err := os.Stat(t.ParserAssert.File)
 		if os.IsNotExist(err) {
 			parserAssertFile, err := os.Create(t.ParserAssert.File)
 			if err != nil {
@@ -560,7 +560,7 @@ func (t *HubTestItem) Run() error {
 			}
 			parserAssertFile.Close()
 		}
-		assertFileStat, err = os.Stat(t.ParserAssert.File)
+		assertFileStat, err := os.Stat(t.ParserAssert.File)
 		if err != nil {
 			return fmt.Errorf("error while stats '%s': %s", t.ParserAssert.File, err)
 		}
@@ -588,7 +588,7 @@ func (t *HubTestItem) Run() error {
 		nbScenario += 1
 	}
 	if nbScenario > 0 {
-		assertFileStat, err := os.Stat(t.ScenarioAssert.File)
+		_, err := os.Stat(t.ScenarioAssert.File)
 		if os.IsNotExist(err) {
 			scenarioAssertFile, err := os.Create(t.ScenarioAssert.File)
 			if err != nil {
@@ -596,7 +596,7 @@ func (t *HubTestItem) Run() error {
 			}
 			scenarioAssertFile.Close()
 		}
-		assertFileStat, err = os.Stat(t.ScenarioAssert.File)
+		assertFileStat, err := os.Stat(t.ScenarioAssert.File)
 		if err != nil {
 			return fmt.Errorf("error while stats '%s': %s", t.ScenarioAssert.File, err)
 		}

pkg/cwhub/loader.go

@@ -17,7 +17,7 @@ import (
 /*the walk/parser_visit function can't receive extra args*/
 var hubdir, installdir string
 
-func parser_visit(path string, f os.FileInfo, err error) error {
+func parser_visit(path string, f os.DirEntry, err error) error {
 
 	var target Item
 	var local bool
@@ -28,6 +28,12 @@ func parser_visit(path string, f os.FileInfo, err error) error {
 	var fauthor string
 	var stage string
 
+	if err != nil {
+		log.Warningf("error while syncing hub dir: %v", err)
+		// there is a path error, we ignore the file
+		return nil
+	}
+
 	path, err = filepath.Abs(path)
 	if err != nil {
 		return err
@@ -96,7 +102,7 @@ func parser_visit(path string, f os.FileInfo, err error) error {
 		when the collection is installed, both files are created
 	*/
 	//non symlinks are local user files or hub files
-	if f.Mode()&os.ModeSymlink == 0 {
+	if f.Type() & os.ModeSymlink == 0 {
 		local = true
 		log.Tracef("%s isn't a symlink", path)
 	} else {
@@ -309,7 +315,7 @@ func SyncDir(hub *csconfig.Hub, dir string) (error, []string) {
 		if err != nil {
 			log.Errorf("failed %s : %s", cpath, err)
 		}
-		err = filepath.Walk(cpath, parser_visit)
+		err = filepath.WalkDir(cpath, parser_visit)
 		if err != nil {
 			return err, warnings
 		}

pkg/leakybucket/buckets_test.go

@@ -225,7 +225,7 @@ POLL_AGAIN:
 			log.Warning("Test is successful")
 			if dump {
 				if tmpFile, err = DumpBucketsStateAt(latest_ts, ".", buckets); err != nil {
-					t.Fatalf("Failed dumping bucket state : %s", err)
+					t.Fatalf("Failed to dump bucket state: %s", err)
 				}
 				log.Infof("dumped bucket to %s", tmpFile)
 			}
@@ -235,7 +235,7 @@ POLL_AGAIN:
 		if len(tf.Results) != len(results) {
 			if dump {
 				if tmpFile, err = DumpBucketsStateAt(latest_ts, ".", buckets); err != nil {
-					t.Fatalf("Failed dumping bucket state : %s", err)
+					t.Fatalf("Failed to dump bucket state: %s", err)
 				}
 				log.Infof("dumped bucket to %s", tmpFile)
 			}

tests/lib/config/config-local

@@ -60,8 +60,14 @@ config_generate() {
        "${CONFIG_DIR}/"
 
     # the default acquis file contains files that are not readable by everyone
-    # We use a noop configuration that forces nevertheless crowdsec to keep watching
-    echo '{"filenames":["/tmp/should-not-exist.log"],"labels":{"type":"syslog"},"force_inotify":true}' > "${CONFIG_DIR}/acquis.yaml"
+    touch "$LOG_DIR/empty.log"
+    cat <<-EOT >"$CONFIG_DIR/acquis.yaml"
+	source: file
+	filenames:
+	    - $LOG_DIR/empty.log
+	labels:
+	    type: syslog
+	EOT
 
     cp ../plugins/notifications/*/{http,email,slack,splunk,dummy}.yaml \
        "${CONFIG_DIR}/notifications/"