Fixed some misspells, added couple of useful linters. (#1446)

Signed-off-by: Bartek Plotka <bwplotka@gmail.com>

CHANGELOG.md

@@ -273,7 +273,7 @@ Note that this is required to have SRV resolution working on [Golang 1.11+ with
       * [ENHANCEMENT] When closing the db any running compaction will be cancelled so it doesn't block.
       * [CHANGE] *breaking* Renamed flag `--sync-delay` to `--consistency-delay` [#1053](https://github.com/thanos-io/thanos/pull/1053)
 
-  For ruler essentially whole TSDB CHANGELOG applies beween v0.4.0-v0.6.1: https://github.com/prometheus/tsdb/blob/master/CHANGELOG.md
+  For ruler essentially whole TSDB CHANGELOG applies between v0.4.0-v0.6.1: https://github.com/prometheus/tsdb/blob/master/CHANGELOG.md
 
   Note that this was added on TSDB and Prometheus: [FEATURE] Time-ovelapping blocks are now allowed. #370
   Whoever due to nature of Thanos compaction (distributed systems), for safety reason this is disabled for Thanos compactor for now.

Makefile

@@ -30,10 +30,11 @@ HUGO              ?= $(GOBIN)/hugo-$(HUGO_VERSION)
 GOBINDATA_VERSION ?= a9c83481b38ebb1c4eb8f0168fd4b10ca1d3c523
 GOBINDATA         ?= $(GOBIN)/go-bindata-$(GOBINDATA_VERSION)
 GIT               ?= $(shell which git)
-# golangci-lint which includes errcheck, goimports
-# and more. v1.16.0
-GOLANGCILINT_VERSION ?= 97ea1cbb21bbf5e4d0e8bcc0f9243385e9262dcc
-GOLANGCILINT ?= $(GOBIN)/golangci-lint-$(GOLANGCILINT_VERSION)
+
+GOLANGCILINT_VERSION ?= d2b1eea2c6171a1a1141a448a745335ce2e928a1
+GOLANGCILINT         ?= $(GOBIN)/golangci-lint-$(GOLANGCILINT_VERSION)
+MISSPELL_VERSION     ?= c0b55c8239520f6b5aa15a0207ca8b28027ba49e
+MISSPELL             ?= $(GOBIN)/misspell-$(MISSPELL_VERSION)
 
 WEB_DIR           ?= website
 WEBSITE_BASE_URL  ?= https://thanos.io
@@ -229,11 +230,17 @@ web: web-pre-process $(HUGO)
 	@cd $(WEB_DIR) && HUGO_ENV=production $(HUGO) --config hugo.yaml --minify -v -b $(WEBSITE_BASE_URL)
 
 .PHONY: lint
-lint: check-git $(GOLANGCILINT)
-	@echo ">> checking formatting"
-	@$(GOLANGCILINT) run -v --disable-all -E goimports ./...
+# PROTIP:
+# Add
+#      --cpu-profile-path string   Path to CPU profile output file
+#      --mem-profile-path string   Path to memory profile output file
+#
+# to debug big allocations during linting.
+lint: check-git $(GOLANGCILINT) $(MISSPELL)
 	@echo ">> linting all of the Go files"
-	@$(GOLANGCILINT) run -v ./...
+	@$(GOLANGCILINT) run -v --enable goimports --enable goconst --skip-dirs vendor
+	@echo ">> detecting misspells"
+	@find . -type f | grep -v vendor/ | grep -vE '\./\..*' | xargs $(MISSPELL) -error
 
 .PHONY: web-serve
 web-serve: web-pre-process $(HUGO)
@@ -264,6 +271,9 @@ $(GOBINDATA):
 $(GOLANGCILINT):
 	$(call fetch_go_bin_version,github.com/golangci/golangci-lint/cmd/golangci-lint,$(GOLANGCILINT_VERSION))
 
+$(MISSPELL):
+	$(call fetch_go_bin_version,github.com/client9/misspell/cmd/misspell,$(MISSPELL_VERSION))
+
 $(PROTOC):
 	@mkdir -p $(TMP_GOPATH)
 	@echo ">> fetching protoc@${PROTOC_VERSION}"

docs/components/query.md

@@ -149,7 +149,7 @@ It is possible to expose thanos-query UI and optionally API on a sub-path.
 The sub-path can be defined either statically or dynamically via an HTTP header.
 Static path prefix definition follows the pattern used in Prometheus,
 where `web.route-prefix` option defines HTTP request path prefix (endpoints prefix)
-and `web.external-prefix` prefixes the URLs in HTML code and the HTTP redirect responces.
+and `web.external-prefix` prefixes the URLs in HTML code and the HTTP redirect responses.
 
 Additionally, Thanos supports dynamic prefix configuration, which
 [is not yet implemented by Prometheus](https://github.com/prometheus/prometheus/issues/3156).

docs/contributing/how-to-contribute-to-docs.md

@@ -24,7 +24,7 @@ in GitHub as markdown just fine:
 title: <titke>
 type: ...
 weight: <weight>
-menu: <where to link files in>  # This also is refered in permalinks.
+menu: <where to link files in>  # This also is referred in permalinks.
 ---
 ```
 

pkg/promclient/promclient_e2e_test.go

@@ -125,7 +125,7 @@ func TestSnapshot_e2e(t *testing.T) {
 func TestRule_UnmarshalScalarResponse(t *testing.T) {
 	var (
 		scalarJSONResult              = []byte(`[1541196373.677,"1"]`)
-		invalidLengthScalarJSONResult = []byte(`[1541196373.677,"1", "nonsence"]`)
+		invalidLengthScalarJSONResult = []byte(`[1541196373.677,"1", "nonsense"]`)
 		invalidDataScalarJSONResult   = []byte(`["foo","bar"]`)
 
 		vectorResult   model.Vector

pkg/receive/handler.go

@@ -240,7 +240,7 @@ func (h *Handler) receive(w http.ResponseWriter, r *http.Request) {
 
 	var rep replica
 	replicaRaw := r.Header.Get(h.options.ReplicaHeader)
-	// If the header is emtpy, we assume the request is not yet replicated.
+	// If the header is empty, we assume the request is not yet replicated.
 	if replicaRaw != "" {
 		if rep.n, err = strconv.ParseUint(replicaRaw, 10, 64); err != nil {
 			http.Error(w, "could not parse replica header", http.StatusBadRequest)