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changelog.go
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changelog.go
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
package cmd
import (
"errors"
"fmt"
"sort"
"strings"
"github.com/Azure/azure-sdk-for-go/tools/apidiff/markdown"
"github.com/Azure/azure-sdk-for-go/tools/apidiff/report"
"github.com/spf13/cobra"
)
var changelogCmd = &cobra.Command{
Use: "changelog <package search dir> <base commit> <target commit> <release tag version>",
Short: "Generates a CHANGELOG report in markdown format for the packages under the specified directory.",
Long: `The changelog command generates a CHANGELOG for all of the packages under the directory specified in <package dir>.
A table for added, removed, updated, and breaking changes will be created as required.`,
Args: func(cmd *cobra.Command, args []string) error {
// there should be exactly four args, a directory, two commit hashes and the release tag version
if err := cobra.ExactArgs(4)(cmd, args); err != nil {
return err
}
if strings.Index(args[2], ",") > -1 {
return errors.New("sequence of target commits is not supported")
}
return nil
},
RunE: func(cmd *cobra.Command, args []string) error {
return theChangelogCmd(args)
},
}
func init() {
rootCmd.AddCommand(changelogCmd)
}
func theChangelogCmd(args []string) error {
// TODO: refactor so that we don't depend on the packages command
rpt, err := thePackagesCmd(args[:3])
if err != nil {
return err
}
if rpt.IsEmpty() {
return nil
}
// there should only be one report, the delta between the base and target commits
if len(rpt.CommitsReports) > 1 {
panic("expected only one report")
}
for _, cr := range rpt.CommitsReports {
changelog, err := writePackageChangelog(cr, args[3])
if err != nil {
return err
}
fmt.Println(changelog)
}
return nil
}
func writePackageChangelog(pr report.PkgsReport, version string) (string, error) {
md := &markdown.Writer{}
// write out the changelog's title and the release tag header before populating with other changes.
md.WriteTitle("Release History")
md.WriteTopLevelHeader(fmt.Sprintf("%s (Released)", version))
if err := reportAddedPkgs(pr, md); err != nil {
return "", fmt.Errorf("failed to write table for added packages: %+v", err)
}
if err := reportUpdatedPkgs(pr, md); err != nil {
return "", fmt.Errorf("failed to write table for updated packages: %+v", err)
}
if err := reportBreakingPkgs(pr, md); err != nil {
return "", fmt.Errorf("failed to write table for breaking change packages: %+v", err)
}
if err := reportRemovedPkgs(pr, md); err != nil {
return "", fmt.Errorf("failed to write table for removed packages: %+v", err)
}
return md.String(), nil
}
func reportAddedPkgs(pr report.PkgsReport, md *markdown.Writer) error {
if len(pr.AddedPackages) == 0 {
return nil
}
t, err := createPackageTable(pr.AddedPackages)
if err != nil {
return err
}
if t.Rows() > 0 {
md.WriteSubheader("New Packages")
md.WriteTable(*t)
}
return nil
}
func reportUpdatedPkgs(pr report.PkgsReport, md *markdown.Writer) error {
if pr.ModifiedPackages == nil || !pr.ModifiedPackages.HasAdditiveChanges() {
return nil
}
var updated []string
for pkgName, pkgRpt := range pr.ModifiedPackages {
if pkgRpt.HasAdditiveChanges() && !pkgRpt.HasBreakingChanges() {
updated = append(updated, pkgName)
}
}
t, err := createPackageTable(updated)
if err != nil {
return err
}
if t.Rows() > 0 {
md.WriteSubheader("Updated Packages")
md.WriteTable(*t)
}
return nil
}
func reportBreakingPkgs(pr report.PkgsReport, md *markdown.Writer) error {
if pr.ModifiedPackages == nil || !pr.ModifiedPackages.HasBreakingChanges() {
return nil
}
var breaking []string
for pkgName, pkgRpt := range pr.ModifiedPackages {
if pkgRpt.HasBreakingChanges() {
breaking = append(breaking, pkgName)
}
}
t, err := createPackageTable(breaking)
if err != nil {
return err
}
if t.Rows() > 0 {
md.WriteSubheader("Breaking Changes")
md.WriteTable(*t)
}
return nil
}
func reportRemovedPkgs(pr report.PkgsReport, md *markdown.Writer) error {
if len(pr.RemovedPackages) == 0 {
return nil
}
t, err := createPackageTable(pr.RemovedPackages)
if err != nil {
return err
}
if t.Rows() > 0 {
md.WriteSubheader("Removed Packages")
md.WriteTable(*t)
}
return nil
}
type tableRow struct {
pkgName string
apiVersions []string
}
func convertFullPackagePathToPackageNameAndAPIVersion(packageName string) (string, string, error) {
// packageName is a string like "github.com/Azure/azure-sdk-for-go/services/consumption/mgmt/2018-08-31/consumption"
segments := strings.Split(packageName, "/")
if len(segments) < 2 {
return "", "", fmt.Errorf("expecting package name '%s' to have at least two segments", packageName)
}
return segments[len(segments)-1], segments[len(segments)-2], nil
}
func createPackageTable(pkgs []string) (*markdown.Table, error) {
t := markdown.NewTable("rc", "Package Name", "API Version")
rows, err := categorizePackageAPIVersions(pkgs)
if err != nil {
return nil, err
}
for _, row := range rows {
t.AddRow(row.pkgName, strings.Join(row.apiVersions, "<br/>"))
}
return t, nil
}
func categorizePackageAPIVersions(pkgs []string) ([]tableRow, error) {
entries := make(map[string][]string)
for _, pkg := range pkgs {
pkgName, apiVer, err := convertFullPackagePathToPackageNameAndAPIVersion(pkg)
if err != nil {
return nil, err
}
if apis, ok := entries[pkgName]; ok {
entries[pkgName] = append(apis, apiVer)
} else {
entries[pkgName] = []string{apiVer}
}
}
// convert the map to a slice of tableRows
var rows []tableRow
for pkgName, apiVers := range entries {
sort.Strings(apiVers)
rows = append(rows, tableRow{
pkgName: pkgName,
apiVersions: apiVers,
})
}
sort.Slice(rows, func(i, j int) bool {
return rows[i].pkgName < rows[j].pkgName
})
return rows, nil
}