all: fix typos discovered by codespell (zalando#2392)

```
codespell --skip .git --skip ./site --skip ./cmd  | less
```

See https://github.com/codespell-project/codespell

Signed-off-by: Alexander Yastrebov <[email protected]>

Author: AlexanderYastrebov

Makefile

@@ -140,7 +140,7 @@ fuzz: ## run all fuzz tests
 lint: build staticcheck ## run all linters
 
 .PHONY: clean
-clean: ## clean temorary files and driectories
+clean: ## clean temporary files and directories
 	go clean -i -cache -testcache
 	rm -rf .coverprofile-all .cover
 	rm -f ./_test_plugins/*.so

config/config.go

@@ -367,8 +367,8 @@ func NewConfig() *Config {
 	flag.BoolVar(&cfg.ServeRouteCounter, "serve-route-counter", false, "enables reporting counting metrics for each route. Has the route, HTTP method and status code as labels. Currently just implemented for the Prometheus metrics flavour")
 	flag.BoolVar(&cfg.ServeHostMetrics, "serve-host-metrics", false, "enables reporting total serve time metrics for each host")
 	flag.BoolVar(&cfg.ServeHostCounter, "serve-host-counter", false, "enables reporting counting metrics for each host. Has the route, HTTP method and status code as labels. Currently just implemented for the Prometheus metrics flavour")
-	flag.BoolVar(&cfg.ServeMethodMetric, "serve-method-metric", true, "enables the HTTP method as a domain of the total serve time metric. It affects both route and host splitted metrics")
-	flag.BoolVar(&cfg.ServeStatusCodeMetric, "serve-status-code-metric", true, "enables the HTTP response status code as a domain of the total serve time metric. It affects both route and host splitted metrics")
+	flag.BoolVar(&cfg.ServeMethodMetric, "serve-method-metric", true, "enables the HTTP method as a domain of the total serve time metric. It affects both route and host split metrics")
+	flag.BoolVar(&cfg.ServeStatusCodeMetric, "serve-status-code-metric", true, "enables the HTTP response status code as a domain of the total serve time metric. It affects both route and host split metrics")
 	flag.BoolVar(&cfg.BackendHostMetrics, "backend-host-metrics", false, "enables reporting total serve time metrics for each backend")
 	flag.BoolVar(&cfg.AllFiltersMetrics, "all-filters-metrics", false, "enables reporting combined filter metrics for each route")
 	flag.BoolVar(&cfg.CombinedResponseMetrics, "combined-response-metrics", false, "enables reporting combined response time metrics")

config/defaultfilterflags_test.go

@@ -73,15 +73,15 @@ func Test_defaultFiltersFlags_Set(t *testing.T) {
 			}
 			if !tt.wantErr {
 				if len(tt.want) != len(dpf.filters) {
-					t.Errorf("defaultFiltersFlags size missmatch got %d want %d", len(dpf.filters), len(tt.want))
+					t.Errorf("defaultFiltersFlags size mismatch got %d want %d", len(dpf.filters), len(tt.want))
 				}
 
 				if err := yaml.Unmarshal([]byte(tt.args), dpf); err != nil {
 					t.Errorf("defaultFiltersFlags.UnmarshalYAML() error = %v, wantErr %v", err, tt.wantErr)
 				}
 
 				if len(tt.want) != len(dpf.filters) {
-					t.Errorf("defaultFiltersFlags from yaml size missmatch got %d want %d", len(dpf.filters), len(tt.want))
+					t.Errorf("defaultFiltersFlags from yaml size mismatch got %d want %d", len(dpf.filters), len(tt.want))
 				}
 			}
 		})

config/listflag_test.go

@@ -109,7 +109,7 @@ func TestListFlag(t *testing.T) {
 	})
 
 	t.Run("unmarshal error", func(t *testing.T) {
-		const input = "invlaid yaml"
+		const input = "invalid yaml"
 		current := commaListFlag()
 		if err := yaml.Unmarshal([]byte(input), current); err == nil {
 			t.Errorf("Failed to get error from Unmarshal() for invalid input: %q", input)

dataclients/kubernetes/kube.go

@@ -202,7 +202,7 @@ type Options struct {
 	BackendNameTracingTag bool
 
 	// OnlyAllowedExternalNames will enable validation of ingress external names and route groups network
-	// backend addresses, explicit LB endpoints validation agains the list of patterns in
+	// backend addresses, explicit LB endpoints validation against the list of patterns in
 	// AllowedExternalNames.
 	OnlyAllowedExternalNames bool
 

dataclients/kubernetes/kube_test.go

@@ -713,7 +713,7 @@ func TestIngress(t *testing.T) {
 
 		r, d, err := dc.LoadUpdate()
 		if err != nil || len(d) != 0 {
-			t.Error("udpate failed")
+			t.Error("update failed")
 		}
 
 		checkRoutes(t, r, map[string]string{

dataclients/kubernetes/routegroup.go

@@ -426,7 +426,7 @@ func transformExplicitGroupRoute(ctx *routeContext) (*eskip.Route, error) {
 	gr := ctx.groupRoute
 	r := &eskip.Route{Id: ctx.id}
 
-	// Path or PathSubtree, prefer Path if we have, because it is more specifc
+	// Path or PathSubtree, prefer Path if we have, because it is more specific
 	if gr.Path != "" {
 		r.Predicates = appendPredicate(r.Predicates, "Path", gr.Path)
 	} else if gr.PathSubtree != "" {

dataclients/kubernetes/testdata/routegroups/default-filters/failure-opening-default-filters-dir.md

@@ -1,3 +1,3 @@
 ### Note
 
-In this test the directory is a file, so that readdir() fails. Error should be loged.
+In this test the directory is a file, so that readdir() fails. Error should be logged.

docs/kubernetes/ingress-usage.md

@@ -254,7 +254,7 @@ Custom routes specified in ingress will always add the `Host()`
 [predicate](../reference/predicates.md#host) to match the host header specified in
 the ingress `rules:`. If there is a `path:` definition in your
 ingress, then it will be based on the skipper command line parameter
-`-kubernetes-path-mode` set one of theses predicates:
+`-kubernetes-path-mode` set one of these predicates:
 
 - [Path()](../reference/predicates.md#path)
 - [PathSubtree()](../reference/predicates.md#pathsubtree)
@@ -672,7 +672,7 @@ and in our [ratelimit tutorial](../tutorials/ratelimit.md).
 #### Client Ratelimits
 
 The example shows 20 calls per hour per client, based on
-X-Forwarded-For header or IP incase there is no X-Forwarded-For header
+X-Forwarded-For header or IP in case there is no X-Forwarded-For header
 set, are allowed to each skipper instance for the given ingress.
 
 ```yaml

docs/operation/operation.md

@@ -49,7 +49,7 @@ the number for all backends such that we do not run out of sockets.
 
 This will set DisableKeepAlives on the
 [http.Transport](https://golang.org/pkg/net/http/#Transport) to disable
-HTTP keep-alives and to only use the connection for single request.
+HTTP keep-alive and to only use the connection for single request.
 
     -max-idle-connection-backend int
         sets the maximum idle connections for all backend connections

docs/reference/development.md

@@ -1,6 +1,6 @@
 ## How to develop a Filter
 
-A filter is part of a route and can change arbitary http data in the
+A filter is part of a route and can change arbitrary http data in the
 `http.Request` and `http.Response` path of a proxy.
 
 The filter example shows a non trivial diff of a filter

docs/reference/filters.md

@@ -964,7 +964,7 @@ The content type will be automatically detected when not provided.
 
 Block a request based on it's body content.
 
-The filter max buffer size is 2MiB by default and can be overidden with `-max-matcher-buffer-size=<int>`.
+The filter max buffer size is 2MiB by default and can be overridden with `-max-matcher-buffer-size=<int>`.
 
 Parameters:
 
@@ -980,7 +980,7 @@ Example:
 
 Block a request based on it's body content.
 
-The filter max buffer size is 2MiB by default and can be overidden with `-max-matcher-buffer-size=<int>`.
+The filter max buffer size is 2MiB by default and can be overridden with `-max-matcher-buffer-size=<int>`.
 
 Parameters:
 
@@ -995,7 +995,7 @@ Example:
 
 ### sed
 
-The filter sed replaces all occurences of a pattern with a replacement string
+The filter sed replaces all occurrences of a pattern with a replacement string
 in the response body.
 
 Example:
@@ -1011,7 +1011,7 @@ editorRoute: * -> sed("foo", "bar", 64000000) -> "https://www.example.org";
 ```
 
 This filter expects a regexp pattern and a replacement string as arguments.
-During the streaming of the response body, every occurence of the pattern will
+During the streaming of the response body, every occurrence of the pattern will
 be replaced with the replacement string. The editing doesn't happen right when
 the filter is executed, only later when the streaming normally happens, after
 all response filters were called.
@@ -1661,7 +1661,7 @@ oidcClaimsQuery("<path>:[<query>]", ...)
 ```
 
 The filter is chained after `oauthOidc*` authentication as it parses the ID token that has been saved in the internal `StateBag` for this request. It validates access control of the requested path against the defined query.
-It accepts one or more arguments, thats is a path prefix which is granted access to when the query definition evaluates positive.
+It accepts one or more arguments, that is a path prefix which is granted access to when the query definition evaluates positive.
 It supports exact matches of keys, key-value pairs, introspecting of arrays or exact and wildcard matching of nested structures.
 The query definition can be one or more queries per path, space delimited. The query syntax is [GJSON](https://github.com/tidwall/gjson/blob/master/SYNTAX.md) with a convenience modifier of `@_` which unfolds to `[@this].#("+arg+")`
 
@@ -2225,7 +2225,7 @@ This enables logs of all requests with status codes `1xxs`, `301` and all `20xs`
 ### auditLog
 
 Filter `auditLog()` logs the request and N bytes of the body into the
-log file. N defaults to 1024 and can be overidden with
+log file. N defaults to 1024 and can be overridden with
 `-max-audit-body=<int>`. `N=0` omits logging the body.
 
 Example:

docs/reference/predicates.md

@@ -530,7 +530,7 @@ Examples:
 Cron("* * * * *")
 // match only when the hour is between 5-7 (inclusive)
 Cron("* 5-7, * * *")
-// match only when the hour is between 5-7, equal to 8, or betweeen 12-15
+// match only when the hour is between 5-7, equal to 8, or between 12-15
 Cron("* 5-7,8,12-15 * * *")
 // match only when it is weekdays
 Cron("* * * * 1-5")
@@ -664,7 +664,7 @@ ignoring the chance argument.
 Parameters:
 
 * Traffic (decimal) valid values [0.0, 1.0]
-* Traffic (decimal, string, string) session stickyness
+* Traffic (decimal, string, string) session stickiness
 
 Examples:
 
@@ -682,7 +682,7 @@ v1:
     "https://api-test-blue";
 ```
 
-stickyness:
+stickiness:
 
 ```
 // hit by 5% percent chance

docs/tutorials/auth.md

@@ -182,12 +182,12 @@ oauthOidcUserInfo("https://oidc-provider.example.com", "client_id", "client_secr
 ```
 
 This filter is similar but it verifies that the token has certain user information
-information fields accesible with the token return by the provider. The fields can
+information fields accessible with the token return by the provider. The fields can
 be specified at the end like in the example above where the fields `name`, `email`
 and `picture` are requested.
 
-Upon sucessful authentication Skipper will start allowing the user requests through
-to the backend. Along with the orginal request to the backend Skipper will include
+Upon successful authentication Skipper will start allowing the user requests through
+to the backend. Along with the original request to the backend Skipper will include
 information which it obtained from the provider. The information is in `JSON` format
 with the header name `Skipper-Oidc-Info`. In the case of the claims container the
 header value is in the format.
@@ -310,7 +310,7 @@ Skipper must be configured with the following credentials and secrets:
 1. OAuth2 client secret for authenticating with the OAuth2 provider.
 1. Cookie encryption secret for encrypting and decrypting token cookies.
 
-You can load all of theses secrets from separate files, in which case they get automatically
+You can load all of these secrets from separate files, in which case they get automatically
 reloaded to support secret rotation. You can provide the paths to the files containing each 
 secret as follows:
 

docs/tutorials/basics.md

@@ -410,7 +410,7 @@ If there is more than 1024 routes used, then the paging the results is
 possible with the `offset` and `limit` query parameters:
 
 ```
-curl locahost:9911/routes?offset=2048&limit=512
+curl localhost:9911/routes?offset=2048&limit=512
 ```
 
 ### Route IDs

docs/tutorials/development.md

@@ -67,7 +67,7 @@ For *Visual Studion Code* users, a simple setup could be to create following *la
                 "-inline-routes=PathSubtree(\"/\") -> inlineContent(\"Hello World\") -> <shunt>",
                // example OIDC setup, using https://developer.microsoft.com/en-us/microsoft-365/dev-program
                //  "-oidc-secrets-file=${workspaceFolder}/.vscode/launch.json",
-               //  "-inline-routes=* -> oauthOidcAnyClaims(\"https://login.microsoftonline.com/<tenant Id>/v2.0\",\"<application id>\",\"<client secret>\",\"http://localhost:9999/authcallback\", \"profile\", \"\", \"\", \"x-auth-email:claims.email x-groups:claims.groups\") -> inlineContent(\"restriced access\") -> <shunt>",
+               //  "-inline-routes=* -> oauthOidcAnyClaims(\"https://login.microsoftonline.com/<tenant Id>/v2.0\",\"<application id>\",\"<client secret>\",\"http://localhost:9999/authcallback\", \"profile\", \"\", \"\", \"x-auth-email:claims.email x-groups:claims.groups\") -> inlineContent(\"restricted access\") -> <shunt>",
             ],
             "serverReadyAction": {
                 "pattern": "route settings applied",

eskip/lexer.go

@@ -191,7 +191,7 @@ func scanRegexp(code string) ([]byte, string) {
 		}
 
 		if escaped {
-			//delimeter / is escaped in PathRegexp so that it means no end PathRegexp(/\//)
+			//delimiter / is escaped in PathRegexp so that it means no end PathRegexp(/\//)
 			if !isDelimiter && !isEscapeChar {
 				b = append(b, escapeChar)
 			}

eskipfile/remote.go

@@ -17,7 +17,7 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
-var errContentNotChanged = errors.New("content in cache did not change, 304 reponse status code")
+var errContentNotChanged = errors.New("content in cache did not change, 304 response status code")
 
 type remoteEskipFile struct {
 	once            sync.Once

filters/apiusagemonitoring/spec_test.go

@@ -572,7 +572,7 @@ func Test_CreatePathPattern(t *testing.T) {
 			originalPath:        "//bas//customers///:customer-id//",
 			expectedPathPattern: "^/*bas/+customers/+.+/*$",
 		},
-		"with escape caracters": {
+		"with escape characters": {
 			originalPath:        "/bas/*(cust\\omers)?.id+/",
 			expectedPathPattern: "^/*bas/+\\*\\(cust\\\\omers\\)\\?\\.id\\+/*$",
 		},

filters/auth/doc.go

@@ -353,7 +353,7 @@ filter after the auth filter.
 
 The filter webhook allows you to have a custom authentication and
 authorization endpoint for a route. Headers from the webhook response
-can be copyied into the continuing request by specifying the
+can be copied into the continuing request by specifying the
 headers to copy as an optional second argument to the filter
 
 	a: Path("/only-allowed-by-webhook") -> webhook("https://custom-webhook.example.org/auth") -> "https://protected-backend.example.org/";

filters/auth/forwardtokenfield_test.go

@@ -104,6 +104,6 @@ func TestForwardFieldFieldEmpty(t *testing.T) {
 	f.Request(c)
 
 	if c.FRequest.Header.Get("Header1") != "blbabla" {
-		t.Fatalf("Header1 should not be overriden")
+		t.Fatalf("Header1 should not be overridden")
 	}
 }

filters/fadein/fadein.go

@@ -174,7 +174,7 @@ func (endpointCreated) CreateFilter(args []interface{}) (filters.Filter, error)
 		return nil, filters.ErrInvalidFilterParameters
 	}
 
-	// mitigate potential flakyness caused by clock skew. When the created time is in the future based on
+	// mitigate potential flakiness caused by clock skew. When the created time is in the future based on
 	// the local clock, we ignore it.
 	now := time.Now()
 	if ec.when.After(now) {

filters/flowid/filter.go

@@ -99,7 +99,7 @@ func (spec *flowIdSpec) CreateFilter(fc []interface{}) (filters.Filter, error) {
 			return nil, filters.ErrInvalidFilterParameters
 		}
 		if len(fc) > 1 {
-			log.Println("flow id filter warning: this syntaxt is deprecated and will be removed soon. " +
+			log.Println("flow id filter warning: this syntax is deprecated and will be removed soon. " +
 				"please check updated docs")
 		}
 	}

filters/ratelimit/ratelimit.go

@@ -1,5 +1,5 @@
 /*
-Package ratelimit provides filters to control the rate limitter settings on the route level.
+Package ratelimit provides filters to control the rate limiter settings on the route level.
 
 For detailed documentation of the ratelimit, see https://godoc.org/github.com/zalando/skipper/ratelimit.
 */

filters/scheduler/fifo_test.go

@@ -207,7 +207,7 @@ func TestFifo(t *testing.T) {
 				t.Fatalf("Failed to parse filter: %v", err)
 			}
 			if err == nil && tt.wantParseErr {
-				t.Fatalf("want parse error but hav no: %v", err)
+				t.Fatalf("want parse error but have no: %v", err)
 			}
 			if tt.wantParseErr {
 				return
@@ -375,7 +375,7 @@ func TestConstantRouteUpdatesFifo(t *testing.T) {
 				t.Fatalf("Failed to parse filter: %v", err)
 			}
 			if err == nil && tt.wantParseErr {
-				t.Fatalf("want parse error but hav no: %v", err)
+				t.Fatalf("want parse error but have no: %v", err)
 			}
 			if tt.wantParseErr {
 				return

filters/scheduler/lifo.go

@@ -85,7 +85,7 @@ func (s *lifoSpec) Name() string { return filters.LifoName }
 // MaxConcurrency and MaxQueueSize: total max = MaxConcurrency + MaxQueueSize
 //
 // Min values are 1 for MaxConcurrency and MaxQueueSize, and 1ms for
-// Timeout. All configration that is below will be set to these min
+// Timeout. All configuration that is below will be set to these min
 // values.
 func (s *lifoSpec) CreateFilter(args []interface{}) (filters.Filter, error) {
 	var l lifoFilter
@@ -153,7 +153,7 @@ func (*lifoGroupSpec) Name() string { return filters.LifoGroupName }
 // MaxConcurrency and MaxQueueSize: total max = MaxConcurrency + MaxQueueSize
 //
 // Min values are 1 for MaxConcurrency and MaxQueueSize, and 1ms for
-// Timeout. All configration that is below will be set to these min
+// Timeout. All configuration that is below will be set to these min
 // values.
 //
 // It is enough to set the concurrency, queue size and timeout parameters for

filters/scheduler/lifo_test.go

@@ -337,7 +337,7 @@ func TestNewLIFO(t *testing.T) {
 					t.Errorf("Queue should not be nil, got: %v", q)
 				}
 			} else {
-				t.Fatalf("Failed to get lifoFilter ot lifoGroupFilter from filter: %v, ok: %v", f, ok)
+				t.Fatalf("Failed to get lifoFilter or lifoGroupFilter from filter: %v, ok: %v", f, ok)
 			}
 
 			backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

filters/sed/doc.go

@@ -12,7 +12,7 @@ Example with larger max buffer:
 	editorRoute: * -> sed("foo", "bar", 64000000) -> "https://www.example.org";
 
 This filter expects a regexp pattern and a replacement string as arguments.
-During the streaming of the response body, every occurence of the pattern will
+During the streaming of the response body, every occurrence of the pattern will
 be replaced with the replacement string. The editing doesn't happen right when
 the filter is executed, only later when the streaming normally happens, after
 all response filters were called.

filters/sed/editor.go

@@ -19,13 +19,13 @@ const (
 	maxBufferAbort
 )
 
-// editor provides a reader that wraps an input reader, and replaces each occurence of
+// editor provides a reader that wraps an input reader, and replaces each occurrence of
 // the provided search pattern with the provided replacement. It can be used with a
 // delimiter or without.
 //
 // When using it with a delimiter, it reads enough data from the input until meeting
 // a delimiter or reaching maxBufferSize. The chunk includes the delimiter if any. Then
-// every occurence of the pattern is replaced, and the entire edited chunk is returned
+// every occurrence of the pattern is replaced, and the entire edited chunk is returned
 // to the caller.
 //
 // When not using a delimiter, it reads enough data until at least a complete match of the

loadbalancer/fadein_test.go

@@ -146,7 +146,7 @@ func testFadeIn(
 			}
 
 			// Print CSV-like output for, where row number represents time and
-			// column represents endpoint. You can vizualize it using
+			// column represents endpoint. You can visualize it using
 			// ./skptesting/run_fadein_test.sh from the skipper repo root.
 			t.Log("CSV " + fmt.Sprintf("%d,", i) + strings.Join(showStats, ","))
 		}