rename lint to po-lint

As discussed in #2938
the binary name `lint` is too generic if used outside of the docker
image. So it's been renamed to `po-lint`.

.gitignore

@@ -1,5 +1,5 @@
 /operator
-/lint
+/po-lint
 /prometheus-config-reloader
 .build/
 *~

Documentation/user-guides/linting.md

@@ -4,15 +4,15 @@ This document describes how to use the standalone linting tool to validate your
 
 ## Getting linter
 
-To use the linter either get it with `go get -u github.com/coreos/prometheus-operator/cmd/lint` and executable is `$GOPATH/bin/lint`, or use the container image from `quay.io/coreos/prometheus-operator-lint` and executable is `/bin/lint`.
+To use the linter either get it with `go get -u github.com/coreos/prometheus-operator/cmd/po-lint` and executable is `$GOPATH/bin/po-lint`, or use the container image from `quay.io/coreos/prometheus-operator-lint` and executable is `/bin/po-lint`.
 
 ## Using linter
 
-The `lint` executable takes a list of yaml files to check as command arguments. It will output any errors to stderr and returns with exit code `1` on errors, `0` otherwise.
+The `po-lint` executable takes a list of yaml files to check as command arguments. It will output any errors to stderr and returns with exit code `1` on errors, `0` otherwise.
 
 ## Example
 
-Here is an example script to lint a `src` sub-directory full of Prometheus Operator CRD files with ether local `lint` or Dockerized version:
+Here is an example script to lint a `src` sub-directory full of Prometheus Operator CRD files with ether local `po-lint` or Dockerized version:
 
 ```sh
 #!/bin/sh
@@ -21,12 +21,12 @@ LINTER="quay.io/coreos/prometheus-operator-lint"
 SCRIPT=$(basename "$0")
 
 lint_files() {
-  if [ -x "$(command -v lint)" ]; then
+  if [ -x "$(command -v po-lint)" ]; then
     echo "Linting '${2}' files in directory '${1}'..."
     had_errors=0
     for file in $(find "${1}" -name "${2}"); do
       echo "${file}"
-      lint "${file}"
+      po-lint "${file}"
       retval=$?
       if [ $retval -ne 0 ]; then
         had_errors=1

Makefile

@@ -62,7 +62,7 @@ clean:
 ############
 
 .PHONY: build
-build: $(BINDATA_TARGET) operator prometheus-config-reloader k8s-gen lint
+build: $(BINDATA_TARGET) operator prometheus-config-reloader k8s-gen po-lint
 
 .PHONY: operator
 operator:
@@ -72,9 +72,9 @@ operator:
 prometheus-config-reloader:
 	$(GO_BUILD_RECIPE) -o $@ cmd/$@/main.go
 
-.PHONY: lint
-lint:
-	$(GO_BUILD_RECIPE) -o lint cmd/lint/main.go
+.PHONY: po-lint
+po-lint:
+	$(GO_BUILD_RECIPE) -o po-lint cmd/po-lint/main.go
 
 DEEPCOPY_TARGET := pkg/apis/monitoring/v1/zz_generated.deepcopy.go
 $(DEEPCOPY_TARGET): $(CONTROLLER_GEN_BINARY)
@@ -138,11 +138,11 @@ image: .hack-operator-image .hack-prometheus-config-reloader-image .hack-lint-im
 	docker build -t $(REPO_PROMETHEUS_CONFIG_RELOADER):$(TAG) -f cmd/prometheus-config-reloader/Dockerfile .
 	touch $@
 
-.hack-lint-image: cmd/lint/Dockerfile lint
+.hack-lint-image: cmd/po-lint/Dockerfile po-lint
 # Create empty target file, for the sole purpose of recording when this target
 # was last executed via the last-modification timestamp on the file. See
 # https://www.gnu.org/software/make/manual/make.html#Empty-Targets
-	docker build -t $(REPO_PROMETHEUS_OPERATOR_LINT):$(TAG) -f cmd/lint/Dockerfile .
+	docker build -t $(REPO_PROMETHEUS_OPERATOR_LINT):$(TAG) -f cmd/po-lint/Dockerfile .
 	touch $@
 
 ##############

cmd/lint/Dockerfile → cmd/po-lint/Dockerfile

@@ -1,7 +1,7 @@
 FROM quay.io/prometheus/busybox:latest
 
-ADD lint /bin/lint
+ADD po-lint /bin/po-lint
 
 USER nobody
 
-ENTRYPOINT ["/bin/lint"]
+ENTRYPOINT ["/bin/po-lint"]