feat(internal/godocfx): add status to packages and TOCs (#4547)

internal/godocfx/parse.go

@@ -49,10 +49,11 @@ type tableOfContents []*tocItem
 
 // tocItem is an item in a TOC.
 type tocItem struct {
-	UID   string     `yaml:"uid,omitempty"`
-	Name  string     `yaml:"name,omitempty"`
-	Items []*tocItem `yaml:"items,omitempty"`
-	Href  string     `yaml:"href,omitempty"`
+	UID    string     `yaml:"uid,omitempty"`
+	Name   string     `yaml:"name,omitempty"`
+	Items  []*tocItem `yaml:"items,omitempty"`
+	Href   string     `yaml:"href,omitempty"`
+	Status string     `yaml:"status,omitempty"`
 }
 
 func (t *tocItem) addItem(i *tocItem) {
@@ -169,6 +170,7 @@ func parse(glob string, workingDir string, optionalExtraFiles []string, filter [
 			Type:     "package",
 			Examples: processExamples(pi.Doc.Examples, pi.Fset),
 			AltLink:  "https://pkg.go.dev/" + pi.Doc.ImportPath,
+			Status:   pi.Status,
 		}
 		pkgPage := &page{Items: []*item{pkgItem}}
 		pages[pi.Doc.ImportPath] = pkgPage
@@ -545,12 +547,6 @@ func buildTOC(mod string, pis []pkgload.Info, extraFiles []extraFile) tableOfCon
 		Name: mod,
 	}
 
-	// Assume the module root has a package.
-	modTOC.addItem(&tocItem{
-		UID:  mod,
-		Name: mod,
-	})
-
 	for _, ef := range extraFiles {
 		modTOC.addItem(&tocItem{
 			Href: ef.dstRelativePath,
@@ -560,31 +556,35 @@ func buildTOC(mod string, pis []pkgload.Info, extraFiles []extraFile) tableOfCon
 
 	toc = append(toc, modTOC)
 
-	if len(pis) == 1 {
-		// The module only has one package.
-		return toc
-	}
-
 	trimmedPkgs := []string{}
+	statuses := map[string]string{}
 	for _, pi := range pis {
 		importPath := pi.Doc.ImportPath
 		if importPath == mod {
+			// Add the module root package immediately with the full name.
+			modTOC.addItem(&tocItem{
+				UID:    mod,
+				Name:   mod,
+				Status: pi.Status,
+			})
 			continue
 		}
 		if !strings.HasPrefix(importPath, mod) {
 			panic(fmt.Sprintf("Package %q does not start with %q, should never happen", importPath, mod))
 		}
 		trimmed := strings.TrimPrefix(importPath, mod+"/")
 		trimmedPkgs = append(trimmedPkgs, trimmed)
+		statuses[trimmed] = pi.Status
 	}
 
 	sort.Strings(trimmedPkgs)
 
 	for _, trimmed := range trimmedPkgs {
 		uid := mod + "/" + trimmed
 		pkgTOCItem := &tocItem{
-			UID:  uid,
-			Name: trimmed,
+			UID:    uid,
+			Name:   trimmed,
+			Status: statuses[trimmed],
 		}
 		modTOC.addItem(pkgTOCItem)
 	}

internal/godocfx/pkgload/load.go

@@ -34,6 +34,7 @@ type Info struct {
 	Fset *token.FileSet
 	// ImportRenames is a map from package path to local name or "".
 	ImportRenames map[string]string
+	Status        string
 }
 
 // Load parses the given glob and returns info for the matching packages.
@@ -157,12 +158,36 @@ func Load(glob, workingDir string, filter []string) ([]Info, error) {
 			Doc:           docPkg,
 			Fset:          fset,
 			ImportRenames: imports,
+			Status:        pkgStatus(pkgPath, docPkg.Doc),
 		})
 	}
 
 	return result, nil
 }
 
+// pkgStatus returns the status of the given package with the
+// given GoDoc.
+//
+// pkgStatus does not use repo-metadata-full.json because it's
+// not available for all modules nor all versions.
+func pkgStatus(importPath, doc string) string {
+	switch {
+	case strings.Contains(doc, "\nDeprecated:"):
+		return "deprecated"
+	case strings.Contains(doc, "This package is in alpha"):
+		return "alpha"
+	case strings.Contains(doc, "This package is in beta"):
+		return "beta"
+
+	case strings.Contains(importPath, "alpha"):
+		return "alpha"
+	case strings.Contains(importPath, "beta"):
+		return "beta"
+	}
+
+	return ""
+}
+
 func hasPrefix(s string, prefixes []string) bool {
 	for _, prefix := range prefixes {
 		if strings.HasPrefix(s, prefix) {

internal/godocfx/pkgload/load_test.go

@@ -0,0 +1,65 @@
+// Copyright 2021 Google LLC
+//
+// 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 pkgload
+
+import "testing"
+
+func TestPkgStatus(t *testing.T) {
+	tests := []struct {
+		importPath string
+		doc        string
+		want       string
+	}{
+		{
+			importPath: "cloud.google.com/go",
+			want:       "",
+		},
+		{
+			importPath: "cloud.google.com/go/storage/v1alpha1",
+			want:       "alpha",
+		},
+		{
+			importPath: "cloud.google.com/go/storage/v2beta2",
+			want:       "beta",
+		},
+		{
+			doc:  "NOTE: This package is in beta. It is not stable, and may be subject to changes.",
+			want: "beta",
+		},
+		{
+			doc:  "NOTE: This package is in alpha. It is not stable, and is likely to change.",
+			want: "alpha",
+		},
+		{
+			doc:  "Package foo is great\nDeprecated: not anymore",
+			want: "deprecated",
+		},
+		{
+			importPath: "cloud.google.com/go/storage/v1alpha1",
+			doc:        "Package foo is great\nDeprecated: not anymore",
+			want:       "deprecated", // Deprecated comes before alpha and beta.
+		},
+		{
+			importPath: "cloud.google.com/go/storage/v1beta1",
+			doc:        "Package foo is great\nDeprecated: not anymore",
+			want:       "deprecated", // Deprecated comes before alpha and beta.
+		},
+	}
+	for _, test := range tests {
+		if got := pkgStatus(test.importPath, test.doc); got != test.want {
+			t.Errorf("pkgStatus(%q, %q) got %q, want %q", test.importPath, test.doc, got, test.want)
+		}
+	}
+}

internal/godocfx/testdata/golden/toc.yml

@@ -2,7 +2,7 @@
 - uid: cloud.google.com/go/storage
   name: cloud.google.com/go/storage
   items:
-  - uid: cloud.google.com/go/storage
-    name: cloud.google.com/go/storage
   - name: README
     href: pkg-readme.md
+  - uid: cloud.google.com/go/storage
+    name: cloud.google.com/go/storage