Organize verify directory

Dockerfile

@@ -6,7 +6,7 @@ COPY notes notes
 WORKDIR /go/src/verify/verify
 
 ENV CGO_ENABLED=0
-RUN go build -o /go/bin/verifypr ./cmd/
+RUN go build -o /go/bin/verifypr ./
 
 FROM gcr.io/distroless/static-debian10
 

README.md

@@ -46,9 +46,10 @@ jobs:
         github_token: ${{ secrets.GITHUB_TOKEN }}
 ```
 
-The code that actually runs lives in [verify/cmd](/verify/cmd), while
-[/verify](/verify) contains a framework for running PR description checks
-from GitHub actions & uploading the result via the GitHub checks API.
+The code that actually runs lives in [verify](/verify), while
+[/verify/pkg/action](/verify/pkg/action) contains a framework for running PR
+description checks from GitHub actions & uploading the result via the GitHub
+checks API.
 
 This repo itself uses a "live" version of the action that always rebuilds
 from the local code (master branch), which lives in 

verify/descriptiveness.go

@@ -0,0 +1,53 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"strings"
+
+	"github.com/google/go-github/v32/github"
+
+	"sigs.k8s.io/kubebuilder-release-tools/verify/pkg/action"
+)
+
+type prDescriptivenessError struct{}
+
+func (e prDescriptivenessError) Error() string {
+	return "Your PR description is *really* short."
+}
+func (e prDescriptivenessError) Details() string {
+	return `It probably isn't descriptive enough.
+You should give a description that highlights both what you're doing it and *why* you're doing it.
+Someone reading the PR description without clicking any issue links should be able to roughly understand what's going on.`
+}
+
+// checkPRDescriptiveness
+func checkPRDescriptiveness(requiredLines int) action.ValidateFunc {
+	return func(pr *github.PullRequest) (string, string, error) {
+		lineCnt := 0
+		for _, line := range strings.Split(pr.GetBody(), "\n") {
+			if strings.TrimSpace(line) == "" {
+				continue
+			}
+			lineCnt++
+		}
+		if lineCnt < requiredLines {
+			return "", "", &prDescriptivenessError{}
+		}
+		return "Your PR looks descriptive enough!", "", nil
+	}
+}

verify/issue.go

@@ -0,0 +1,50 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+	"regexp"
+
+	"github.com/google/go-github/v32/github"
+
+	notes "sigs.k8s.io/kubebuilder-release-tools/notes/common"
+)
+
+var tagRegexp = regexp.MustCompile(`#\d+\b`)
+
+type prIssueInTitleError struct{}
+
+func (e prIssueInTitleError) Error() string {
+	return "Your PR has an Issue or PR number in the title."
+}
+func (e prIssueInTitleError) Details() string {
+	return fmt.Sprintf(`The title should just be descriptive.
+Issue numbers belong in the PR body as either %#q (if it closes the issue or PR), or something like %#q (if it's just related).`,
+		"Fixes #XYZ", "Related to #XYZ",
+	)
+}
+
+// checkIssueInTitle verifies that the PR title does not contain any Issue or PR tag
+func checkIssueInTitle(pr *github.PullRequest) (string, string, error) {
+	_, title := notes.PRTypeFromTitle(pr.GetTitle())
+	if tagRegexp.MatchString(title) {
+		return "", "", prIssueInTitleError{}
+	}
+
+	return "Your PR title does not contain any Issue or PR tags", "", nil
+}

verify/main.go

@@ -0,0 +1,41 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"sigs.k8s.io/kubebuilder-release-tools/verify/pkg/action"
+)
+
+func main() {
+	action.New(
+		action.NewPlugin(
+			"PR Type",
+			"PR Type in Title",
+			verifyPRType,
+		),
+		action.NewPlugin(
+			"PR Issue",
+			"Issue/PR tag in PR title",
+			checkIssueInTitle,
+		),
+		action.NewPlugin(
+			"PR Desc",
+			"Basic PR Descriptiveness Check",
+			checkPRDescriptiveness(2),
+		),
+	).Run()
+}