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app.go
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app.go
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/*
Copyright 2017 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"
"io/ioutil"
"log"
"net/url"
"os"
"path/filepath"
"regexp"
"sort"
"strings"
"text/template"
"time"
yaml "gopkg.in/yaml.v3"
)
const (
readmeTemplate = "readme.tmpl"
listTemplate = "list.tmpl"
aliasesTemplate = "aliases.tmpl"
liaisonsTemplate = "liaisons.tmpl"
headerTemplate = "header.tmpl"
annualReportIssueTemplate = "annual-report/github_issue.tmpl"
annualReportSIGTemplate = "annual-report/sig_report.tmpl"
annualReportWGTemplate = "annual-report/wg_report.tmpl"
sigsYamlFile = "sigs.yaml"
sigListOutput = "sig-list.md"
aliasesOutput = "OWNERS_ALIASES"
indexFilename = "README.md"
liaisonsFilename = "liaisons.md"
beginCustomMarkdown = "<!-- BEGIN CUSTOM CONTENT -->"
endCustomMarkdown = "<!-- END CUSTOM CONTENT -->"
beginCustomYaml = "## BEGIN CUSTOM CONTENT"
endCustomYaml = "## END CUSTOM CONTENT"
regexRawGitHubURL = "https://raw.githubusercontent.com/(?P<org>[^/]+)/(?P<repo>[^/]+)/(?P<branch>[^/]+)/(?P<path>.*)"
regexGitHubURL = "https://github.com/(?P<org>[^/]+)/(?P<repo>[^/]+)/(blob|tree)/(?P<branch>[^/]+)/(?P<path>.*)"
)
var (
baseGeneratorDir = ""
templateDir = "generator"
)
// FoldedString is a string that will be serialized in FoldedStyle by go-yaml
type FoldedString string
// MarshalYAML customizes how FoldedStrings will be serialized by go-yaml
func (x FoldedString) MarshalYAML() (interface{}, error) {
return &yaml.Node{
Kind: yaml.ScalarNode,
Style: yaml.FoldedStyle,
Value: string(x),
}, nil
}
// Person represents an individual person holding a role in a group.
type Person struct {
GitHub string
Name string
Company string `yaml:"company,omitempty"`
}
// Meeting represents a regular meeting for a group.
type Meeting struct {
Description string
Day string
Time string
TZ string
Frequency string
URL string `yaml:",omitempty"`
ArchiveURL string `yaml:"archive_url,omitempty"`
RecordingsURL string `yaml:"recordings_url,omitempty"`
}
// Contact represents the various contact points for a group.
type Contact struct {
Slack string `yaml:",omitempty"`
MailingList string `yaml:"mailing_list,omitempty"`
PrivateMailingList string `yaml:"private_mailing_list,omitempty"`
GithubTeams []GithubTeam `yaml:"teams,omitempty"`
Liaison Person `yaml:"liaison,omitempty"`
}
// GithubTeam represents a specific Github Team.
type GithubTeam struct {
Name string
Description string `yaml:",omitempty"`
}
// Subproject represents a specific subproject owned by the group
type Subproject struct {
Name string
Description string `yaml:",omitempty"`
Contact *Contact `yaml:",omitempty"`
Owners []string
Meetings []Meeting `yaml:",omitempty"`
}
// LeadershipGroup represents the different groups of leaders within a group
type LeadershipGroup struct {
Chairs []Person
TechnicalLeads []Person `yaml:"tech_leads,omitempty"`
EmeritusLeads []Person `yaml:"emeritus_leads,omitempty"`
}
// PrefixToPersonMap returns a map of prefix to persons, useful for iteration over all persons
func (g *LeadershipGroup) PrefixToPersonMap() map[string][]Person {
return map[string][]Person{
"chair": g.Chairs,
"tech_lead": g.TechnicalLeads,
"emeritus_lead": g.EmeritusLeads,
}
}
// Owners returns a sorted and de-duped list of owners for a LeadershipGroup
func (g *LeadershipGroup) Owners() []Person {
o := append(g.Chairs, g.TechnicalLeads...)
// Sort
sort.Slice(o, func(i, j int) bool {
return o[i].GitHub < o[j].GitHub
})
// De-dupe
seen := make(map[string]struct{}, len(o))
i := 0
for _, p := range o {
if _, ok := seen[p.GitHub]; ok {
continue
}
seen[p.GitHub] = struct{}{}
o[i] = p
i++
}
return o[:i]
}
// Group represents either a Special Interest Group (SIG) or a Working Group (WG)
type Group struct {
Dir string
Prefix string `yaml:",omitempty"`
Name string
MissionStatement FoldedString `yaml:"mission_statement,omitempty"`
CharterLink string `yaml:"charter_link,omitempty"`
ReportingWGs []WGName `yaml:"-"` // populated by Context#Complete()
StakeholderSIGs []SIGName `yaml:"stakeholder_sigs,omitempty"`
Label string
Leadership LeadershipGroup `yaml:"leadership"`
Meetings []Meeting
Contact Contact
Subprojects []Subproject `yaml:",omitempty"`
}
type WGName string
func (n WGName) DirName() string {
return DirName("wg", string(n))
}
type SIGName string
func (n SIGName) DirName() string {
return DirName("sig", string(n))
}
// DirName returns the directory that a group's documentation will be
// generated into. It is composed of a prefix (sig for SIGs and wg for WGs),
// and a formatted version of the group's name (in kebab case).
func (g *Group) DirName(prefix string) string {
return DirName(prefix, g.Name)
}
func DirName(prefix, name string) string {
return fmt.Sprintf("%s-%s", prefix, strings.ToLower(strings.Replace(name, " ", "-", -1)))
}
// LabelName returns the expected label for a given group
func (g *Group) LabelName(prefix string) string {
return strings.Replace(g.DirName(prefix), fmt.Sprintf("%s-", prefix), "", 1)
}
// Context is the context for the sigs.yaml file.
type Context struct {
Sigs []Group
WorkingGroups []Group
UserGroups []Group
Committees []Group
}
func index(groups []Group, predicate func(Group) bool) int {
for i, group := range groups {
if predicate(group) {
return i
}
}
return -1
}
// PrefixToGroupMap returns a map of prefix to groups, useful for iteration over all groups
func (c *Context) PrefixToGroupMap() map[string][]Group {
return map[string][]Group{
"sig": c.Sigs,
"wg": c.WorkingGroups,
"ug": c.UserGroups,
"committee": c.Committees,
}
}
// Complete populates derived portions of the Context struct
func (c *Context) Complete() {
// Copy working group names into ReportingWGs list of their stakeholder sigs
for _, wg := range c.WorkingGroups {
for _, stakeholderSIG := range wg.StakeholderSIGs {
for i, sig := range c.Sigs {
if sig.Name == string(stakeholderSIG) {
c.Sigs[i].ReportingWGs = append(c.Sigs[i].ReportingWGs, WGName(wg.Name))
}
}
}
}
}
// Sort sorts all lists within the Context struct
func (c *Context) Sort() {
for _, groups := range c.PrefixToGroupMap() {
sort.Slice(groups, func(i, j int) bool {
return groups[i].Dir < groups[j].Dir
})
for _, group := range groups {
sort.Slice(group.ReportingWGs, func(i, j int) bool {
return group.ReportingWGs[i] < group.ReportingWGs[j]
})
sort.Slice(group.StakeholderSIGs, func(i, j int) bool {
return group.StakeholderSIGs[i] < group.StakeholderSIGs[j]
})
for _, people := range [][]Person{
group.Leadership.Chairs,
group.Leadership.TechnicalLeads,
group.Leadership.EmeritusLeads} {
sort.Slice(people, func(i, j int) bool {
// This ensure OWNERS / OWNERS_ALIASES files are ordered by github
return people[i].GitHub < people[j].GitHub
})
}
sort.Slice(group.Meetings, func(i, j int) bool {
return group.Meetings[i].Description < group.Meetings[j].Description
})
sort.Slice(group.Contact.GithubTeams, func(i, j int) bool {
return group.Contact.GithubTeams[i].Name < group.Contact.GithubTeams[j].Name
})
sort.Slice(group.Subprojects, func(i, j int) bool {
return group.Subprojects[i].Name < group.Subprojects[j].Name
})
for _, subproject := range group.Subprojects {
if subproject.Contact != nil {
sort.Slice(subproject.Contact.GithubTeams, func(i, j int) bool {
return subproject.Contact.GithubTeams[i].Name < subproject.Contact.GithubTeams[j].Name
})
}
sort.Strings(subproject.Owners)
sort.Slice(subproject.Meetings, func(i, j int) bool {
return subproject.Meetings[i].Description < subproject.Meetings[j].Description
})
}
}
}
}
// Validate returns a list of errors encountered while validating a Context
func (c *Context) Validate() []error {
errors := []error{}
people := make(map[string]Person)
reRawGitHubURL := regexp.MustCompile(regexRawGitHubURL)
reGitHubURL := regexp.MustCompile(regexGitHubURL)
for prefix, groups := range c.PrefixToGroupMap() {
for _, group := range groups {
expectedDir := group.DirName(prefix)
if expectedDir != group.Dir {
errors = append(errors, fmt.Errorf("expected dir: %s, got: %s", expectedDir, group.Dir))
}
expectedLabel := group.LabelName(prefix)
if expectedLabel != group.Label {
errors = append(errors, fmt.Errorf("%s: expected label: %s, got: %s", group.Dir, expectedLabel, group.Label))
}
for prefix, persons := range group.Leadership.PrefixToPersonMap() {
for _, person := range persons {
if val, ok := people[person.GitHub]; ok {
if val.Name != person.Name || (prefix != "emeritus_lead" && val.Company != person.Company) {
errors = append(errors, fmt.Errorf("%s: %ss: expected person: %v, got: %v", group.Dir, prefix, val, person))
}
} else if prefix != "emeritus_lead" {
people[person.GitHub] = person
}
if prefix == "emeritus_lead" && person.Company != "" {
errors = append(errors, fmt.Errorf("%s: emeritus leads should not have company specified; company specified for: %s", group.Dir, person.Name))
}
}
}
if len(group.ReportingWGs) != 0 {
if prefix == "sig" {
for _, name := range group.ReportingWGs {
if index(c.WorkingGroups, func(g Group) bool { return g.Name == string(name) }) == -1 {
errors = append(errors, fmt.Errorf("%s: invalid reporting working group name %s", group.Dir, name))
}
}
} else {
errors = append(errors, fmt.Errorf("%s: only SIGs may have reporting WGs", group.Dir))
}
}
if len(group.StakeholderSIGs) != 0 {
if prefix == "wg" {
for _, name := range group.StakeholderSIGs {
if index(c.Sigs, func(g Group) bool { return g.Name == string(name) }) == -1 {
errors = append(errors, fmt.Errorf("%s: invalid stakeholder sig name %s", group.Dir, name))
}
}
} else {
errors = append(errors, fmt.Errorf("%s: only WGs may have stakeholder_sigs", group.Dir))
}
} else {
if prefix == "wg" {
errors = append(errors, fmt.Errorf("%s: WGs must have stakeholder_sigs", group.Dir))
}
}
if prefix == "sig" {
if group.CharterLink == "" {
errors = append(errors, fmt.Errorf("%s: has no charter", group.Dir))
}
// TODO(spiffxp): is this required though?
if group.MissionStatement == "" {
errors = append(errors, fmt.Errorf("%s: has no mission statement", group.Dir))
}
if len(group.Subprojects) == 0 {
errors = append(errors, fmt.Errorf("%s: has no subprojects", group.Dir))
}
}
if prefix != "committee" && prefix != "sig" {
if len(group.Subprojects) > 0 {
errors = append(errors, fmt.Errorf("%s: only sigs and committees can own code / have subprojects, found: %v", group.Dir, group.Subprojects))
}
}
for _, subproject := range group.Subprojects {
if len(subproject.Owners) == 0 {
errors = append(errors, fmt.Errorf("%s/%s: subproject has no owners", group.Dir, subproject.Name))
}
for _, ownerURL := range subproject.Owners {
if !reRawGitHubURL.MatchString(ownerURL) && !reGitHubURL.MatchString(ownerURL) {
errors = append(errors, fmt.Errorf("%s/%s: subproject owners should match regexp %s, found: %s", group.Dir, subproject.Name, regexRawGitHubURL, ownerURL))
}
}
}
}
}
return errors
}
func pathExists(path string) bool {
_, err := os.Stat(path)
return err == nil
}
func createDirIfNotExists(path string) error {
if !pathExists(path) {
return os.MkdirAll(path, 0755)
}
return nil
}
func getExistingContent(path string, fileFormat string) (string, error) {
capture := false
var captured []string
beginMarker := ""
endMarker := ""
switch fileFormat {
case "markdown":
beginMarker = beginCustomMarkdown
endMarker = endCustomMarkdown
case "yaml":
beginMarker = beginCustomYaml
endMarker = endCustomYaml
case "":
return "", nil
}
// NOTE: For some reason using bufio.Scanner with existing file pointer prepends
// a bunch of null ^@ characters, so using to ioutil.ReadFile instead.
content, err := ioutil.ReadFile(path)
if err != nil {
return "", err
}
for _, line := range strings.Split(string(content), "\n") {
if strings.Contains(line, endMarker) {
capture = false
}
if capture {
captured = append(captured, line)
}
if strings.Contains(line, beginMarker) {
capture = true
}
}
return strings.Join(captured, "\n"), nil
}
var funcMap = template.FuncMap{
"tzUrlEncode": tzURLEncode,
"trimSpace": strings.TrimSpace,
"trimSuffix": strings.TrimSuffix,
"githubURL": githubURL,
"orgRepoPath": orgRepoPath,
"now": time.Now,
"lastYear": lastYear,
"toUpper": strings.ToUpper,
}
// lastYear returns the last year as a string
func lastYear() string {
return time.Now().AddDate(-1, 0, 0).Format("2006")
}
// githubURL converts a raw GitHub url (links directly to file contents) into a
// regular GitHub url (links to Code view for file), otherwise returns url untouched
func githubURL(url string) string {
re := regexp.MustCompile(regexRawGitHubURL)
mat := re.FindStringSubmatchIndex(url)
if mat == nil {
return url
}
result := re.ExpandString([]byte{}, "https://github.com/${org}/${repo}/blob/${branch}/${path}", url, mat)
return string(result)
}
// orgRepoPath converts either
// - a regular GitHub url of form https://github.com/org/repo/blob/branch/path/to/file
// - a raw GitHub url of form https://raw.githubusercontent.com/org/repo/branch/path/to/file
// to a string of form 'org/repo/path/to/file'
func orgRepoPath(url string) string {
for _, regex := range []string{regexRawGitHubURL, regexGitHubURL} {
re := regexp.MustCompile(regex)
mat := re.FindStringSubmatchIndex(url)
if mat == nil {
continue
}
result := re.ExpandString([]byte{}, "${org}/${repo}/${path}", url, mat)
return string(result)
}
return url
}
// tzUrlEncode returns a url encoded string without the + shortcut. This is
// required as the timezone conversion site we are using doesn't recognize + as
// a valid url escape character.
func tzURLEncode(tz string) string {
return strings.Replace(url.QueryEscape(tz), "+", "%20", -1)
}
func writeTemplate(templatePath, outputPath string, fileFormat string, data interface{}) error {
// set up template
t, err := template.New(filepath.Base(templatePath)).
Funcs(funcMap).
ParseFiles(templatePath, filepath.Join(baseGeneratorDir, templateDir, headerTemplate))
if err != nil {
return err
}
// create if not exists
if !pathExists(outputPath) {
_, err = os.Create(outputPath)
if err != nil {
return err
}
}
// open file and truncate
f, err := os.OpenFile(outputPath, os.O_RDWR, 0644)
if err != nil {
return err
}
defer f.Close()
// get any existing content
content, err := getExistingContent(outputPath, fileFormat)
if err != nil {
return err
}
// ensure file is empty
f.Truncate(0)
// generated content
err = t.Execute(f, data)
if err != nil {
return err
}
writeCustomContentBlock(f, content, fileFormat)
return nil
}
func writeCustomContentBlock(f *os.File, content string, fileFormat string) {
beginMarker := ""
endMarker := ""
switch fileFormat {
case "markdown":
beginMarker = beginCustomMarkdown
endMarker = endCustomMarkdown
case "yaml":
beginMarker = beginCustomYaml
endMarker = endCustomYaml
case "":
return
}
lines := []string{beginMarker, "\n", content, "\n", endMarker, "\n"}
for _, line := range lines {
f.Write([]byte(line))
}
}
func createGroupReadme(groups []Group, prefix string) error {
// figure out if the user wants to generate one group
var selectedGroupName *string
if envVal, ok := os.LookupEnv("WHAT"); ok {
selectedGroupName = &envVal
}
for _, group := range groups {
// skip generation if the user specified only one group
if selectedGroupName != nil && strings.HasSuffix(group.Dir, *selectedGroupName) == false {
fmt.Printf("Skipping %s/README.md\n", group.Dir)
continue
}
fmt.Printf("Generating %s/README.md\n", group.Dir)
outputDir := filepath.Join(baseGeneratorDir, group.Dir)
if err := createDirIfNotExists(outputDir); err != nil {
return err
}
outputPath := filepath.Join(outputDir, indexFilename)
readmePath := filepath.Join(baseGeneratorDir, templateDir, fmt.Sprintf("%s_%s", prefix, readmeTemplate))
if err := writeTemplate(readmePath, outputPath, "markdown", group); err != nil {
return err
}
}
return nil
}
func createAnnualReportIssue(groups []Group, prefix string) error {
// figure out if the user wants to generate one group
var selectedGroupName *string
if envVal, ok := os.LookupEnv("WHAT"); ok {
selectedGroupName = &envVal
}
for _, group := range groups {
switch prefix {
case "sig":
group.Prefix = "sig"
case "wg":
group.Prefix = "wg"
default:
continue
}
outputDir := filepath.Join(baseGeneratorDir, "generator/generated")
// skip generation if the user specified only one group
if selectedGroupName != nil && !strings.HasSuffix(group.Dir, *selectedGroupName) {
fmt.Printf("Skipping %s/%s_%s.md\n", outputDir, lastYear(), group.Dir)
continue
}
fmt.Printf("Generating %s/%s_%s.md\n", outputDir, lastYear(), group.Dir)
if err := createDirIfNotExists(outputDir); err != nil {
return err
}
outputPath := filepath.Join(outputDir, fmt.Sprintf("%s_%s.md", lastYear(), group.Dir))
templatePath := filepath.Join(baseGeneratorDir, templateDir, annualReportIssueTemplate)
if err := writeTemplate(templatePath, outputPath, "markdown", group); err != nil {
return err
}
}
return nil
}
func createAnnualReport(groups []Group, prefix string) error {
// figure out if the user wants to generate one group
var selectedGroupName *string
var templateFile string
if envVal, ok := os.LookupEnv("WHAT"); ok {
selectedGroupName = &envVal
}
for _, group := range groups {
switch prefix {
case "sig":
group.Prefix = "sig"
templateFile = annualReportSIGTemplate
case "wg":
group.Prefix = "wg"
templateFile = annualReportWGTemplate
default:
continue
}
outputDir := filepath.Join(baseGeneratorDir, group.Dir)
// skip generation if the user specified only one group
if selectedGroupName != nil && !strings.HasSuffix(group.Dir, *selectedGroupName) {
fmt.Printf("Skipping %s/annual-report-%s.md\n", outputDir, lastYear())
continue
}
fmt.Printf("Generating %s/annual-report-%s.md\n", outputDir, lastYear())
if err := createDirIfNotExists(outputDir); err != nil {
return err
}
outputPath := filepath.Join(outputDir, fmt.Sprintf("annual-report-%s.md", lastYear()))
templatePath := filepath.Join(baseGeneratorDir, templateDir, templateFile)
if err := writeTemplate(templatePath, outputPath, "markdown", group); err != nil {
return err
}
}
return nil
}
// readSigsYaml decodes yaml stored in a file at path into the
// specified yaml.Node
func readYaml(path string, data interface{}) error {
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
decoder := yaml.NewDecoder(file)
decoder.KnownFields(true)
return decoder.Decode(data)
}
// writeSigsYaml writes the specified data to a file at path
// indent is set to 2 spaces
func writeYaml(data interface{}, path string) error {
file, err := os.Create(path)
if err != nil {
return err
}
defer file.Close()
enc := yaml.NewEncoder(file)
enc.SetIndent(2)
return enc.Encode(data)
}
func main() {
yamlPath := filepath.Join(baseGeneratorDir, sigsYamlFile)
var ctx Context
err := readYaml(yamlPath, &ctx)
if err != nil {
log.Fatal(err)
}
ctx.Complete()
ctx.Sort()
fmt.Printf("Validating %s\n", yamlPath)
errs := ctx.Validate()
if len(errs) != 0 {
for _, err := range errs {
fmt.Fprintf(os.Stderr, "ERROR: %s\n", err.Error())
}
os.Exit(1)
}
// Write the Context struct back to yaml to enforce formatting
err = writeYaml(&ctx, yamlPath)
if err != nil {
log.Fatal(err)
}
fmt.Println("Generating group READMEs")
for prefix, groups := range ctx.PrefixToGroupMap() {
err = createGroupReadme(groups, prefix)
if err != nil {
log.Fatal(err)
}
}
if envVal, ok := os.LookupEnv("ANNUAL_REPORT"); ok && envVal == "true" {
fmt.Println("Generating annual reports")
for prefix, groups := range ctx.PrefixToGroupMap() {
err = createAnnualReportIssue(groups, prefix)
if err != nil {
log.Fatal(err)
}
err = createAnnualReport(groups, prefix)
if err != nil {
log.Fatal(err)
}
}
}
fmt.Println("Generating sig-list.md")
outputPath := filepath.Join(baseGeneratorDir, sigListOutput)
err = writeTemplate(filepath.Join(baseGeneratorDir, templateDir, listTemplate), outputPath, "markdown", ctx)
if err != nil {
log.Fatal(err)
}
fmt.Println("Generating OWNERS_ALIASES")
outputPath = filepath.Join(baseGeneratorDir, aliasesOutput)
err = writeTemplate(filepath.Join(baseGeneratorDir, templateDir, aliasesTemplate), outputPath, "yaml", ctx)
if err != nil {
log.Fatal(err)
}
fmt.Println("Generating liaisons.md")
outputPath = filepath.Join(baseGeneratorDir, liaisonsFilename)
err = writeTemplate(filepath.Join(baseGeneratorDir, templateDir, liaisonsTemplate), outputPath, "markdown", ctx)
if err != nil {
log.Fatal(err)
}
fmt.Println("Finished generation!")
}