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package api
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"net/http"
"sort"
"strings"
"time"
"github.com/cli/cli/internal/ghrepo"
"github.com/shurcooL/githubv4"
)
// Repository contains information about a GitHub repo
type Repository struct {
ID string
Name string
Description string
URL string
CloneURL string
CreatedAt time.Time
Owner RepositoryOwner
IsPrivate bool
HasIssuesEnabled bool
ViewerPermission string
DefaultBranchRef BranchRef
Parent *Repository
// pseudo-field that keeps track of host name of this repo
hostname string
}
// RepositoryOwner is the owner of a GitHub repository
type RepositoryOwner struct {
Login string
}
// BranchRef is the branch name in a GitHub repository
type BranchRef struct {
Name string
}
// RepoOwner is the login name of the owner
func (r Repository) RepoOwner() string {
return r.Owner.Login
}
// RepoName is the name of the repository
func (r Repository) RepoName() string {
return r.Name
}
// RepoHost is the GitHub hostname of the repository
func (r Repository) RepoHost() string {
return r.hostname
}
// IsFork is true when this repository has a parent repository
func (r Repository) IsFork() bool {
return r.Parent != nil
}
// ViewerCanPush is true when the requesting user has push access
func (r Repository) ViewerCanPush() bool {
switch r.ViewerPermission {
case "ADMIN", "MAINTAIN", "WRITE":
return true
default:
return false
}
}
// ViewerCanTriage is true when the requesting user can triage issues and pull requests
func (r Repository) ViewerCanTriage() bool {
switch r.ViewerPermission {
case "ADMIN", "MAINTAIN", "WRITE", "TRIAGE":
return true
default:
return false
}
}
func GitHubRepo(client *Client, repo ghrepo.Interface) (*Repository, error) {
query := `
fragment repo on Repository {
id
name
owner { login }
hasIssuesEnabled
description
viewerPermission
defaultBranchRef {
name
}
}
query RepositoryInfo($owner: String!, $name: String!) {
repository(owner: $owner, name: $name) {
...repo
parent {
...repo
}
}
}`
variables := map[string]interface{}{
"owner": repo.RepoOwner(),
"name": repo.RepoName(),
}
result := struct {
Repository Repository
}{}
err := client.GraphQL(repo.RepoHost(), query, variables, &result)
if err != nil {
return nil, err
}
return InitRepoHostname(&result.Repository, repo.RepoHost()), nil
}
func RepoDefaultBranch(client *Client, repo ghrepo.Interface) (string, error) {
if r, ok := repo.(*Repository); ok && r.DefaultBranchRef.Name != "" {
return r.DefaultBranchRef.Name, nil
}
r, err := GitHubRepo(client, repo)
if err != nil {
return "", err
}
return r.DefaultBranchRef.Name, nil
}
func CanPushToRepo(httpClient *http.Client, repo ghrepo.Interface) (bool, error) {
if r, ok := repo.(*Repository); ok && r.ViewerPermission != "" {
return r.ViewerCanPush(), nil
}
apiClient := NewClientFromHTTP(httpClient)
r, err := GitHubRepo(apiClient, repo)
if err != nil {
return false, err
}
return r.ViewerCanPush(), nil
}
// RepoParent finds out the parent repository of a fork
func RepoParent(client *Client, repo ghrepo.Interface) (ghrepo.Interface, error) {
var query struct {
Repository struct {
Parent *struct {
Name string
Owner struct {
Login string
}
}
} `graphql:"repository(owner: $owner, name: $name)"`
}
variables := map[string]interface{}{
"owner": githubv4.String(repo.RepoOwner()),
"name": githubv4.String(repo.RepoName()),
}
gql := graphQLClient(client.http, repo.RepoHost())
err := gql.QueryNamed(context.Background(), "RepositoryFindParent", &query, variables)
if err != nil {
return nil, err
}
if query.Repository.Parent == nil {
return nil, nil
}
parent := ghrepo.NewWithHost(query.Repository.Parent.Owner.Login, query.Repository.Parent.Name, repo.RepoHost())
return parent, nil
}
// RepoNetworkResult describes the relationship between related repositories
type RepoNetworkResult struct {
ViewerLogin string
Repositories []*Repository
}
// RepoNetwork inspects the relationship between multiple GitHub repositories
func RepoNetwork(client *Client, repos []ghrepo.Interface) (RepoNetworkResult, error) {
var hostname string
if len(repos) > 0 {
hostname = repos[0].RepoHost()
}
queries := make([]string, 0, len(repos))
for i, repo := range repos {
queries = append(queries, fmt.Sprintf(`
repo_%03d: repository(owner: %q, name: %q) {
...repo
parent {
...repo
}
}
`, i, repo.RepoOwner(), repo.RepoName()))
}
// Since the query is constructed dynamically, we can't parse a response
// format using a static struct. Instead, hold the raw JSON data until we
// decide how to parse it manually.
graphqlResult := make(map[string]*json.RawMessage)
var result RepoNetworkResult
err := client.GraphQL(hostname, fmt.Sprintf(`
fragment repo on Repository {
id
name
owner { login }
viewerPermission
defaultBranchRef {
name
}
isPrivate
}
query RepositoryNetwork {
viewer { login }
%s
}
`, strings.Join(queries, "")), nil, &graphqlResult)
graphqlError, isGraphQLError := err.(*GraphQLErrorResponse)
if isGraphQLError {
// If the only errors are that certain repositories are not found,
// continue processing this response instead of returning an error
tolerated := true
for _, ge := range graphqlError.Errors {
if ge.Type != "NOT_FOUND" {
tolerated = false
}
}
if tolerated {
err = nil
}
}
if err != nil {
return result, err
}
keys := make([]string, 0, len(graphqlResult))
for key := range graphqlResult {
keys = append(keys, key)
}
// sort keys to ensure `repo_{N}` entries are processed in order
sort.Strings(keys)
// Iterate over keys of GraphQL response data and, based on its name,
// dynamically allocate the target struct an individual message gets decoded to.
for _, name := range keys {
jsonMessage := graphqlResult[name]
if name == "viewer" {
viewerResult := struct {
Login string
}{}
decoder := json.NewDecoder(bytes.NewReader([]byte(*jsonMessage)))
if err := decoder.Decode(&viewerResult); err != nil {
return result, err
}
result.ViewerLogin = viewerResult.Login
} else if strings.HasPrefix(name, "repo_") {
if jsonMessage == nil {
result.Repositories = append(result.Repositories, nil)
continue
}
var repo Repository
decoder := json.NewDecoder(bytes.NewReader(*jsonMessage))
if err := decoder.Decode(&repo); err != nil {
return result, err
}
result.Repositories = append(result.Repositories, InitRepoHostname(&repo, hostname))
} else {
return result, fmt.Errorf("unknown GraphQL result key %q", name)
}
}
return result, nil
}
func InitRepoHostname(repo *Repository, hostname string) *Repository {
repo.hostname = hostname
if repo.Parent != nil {
repo.Parent.hostname = hostname
}
return repo
}
// repositoryV3 is the repository result from GitHub API v3
type repositoryV3 struct {
NodeID string
Name string
CreatedAt time.Time `json:"created_at"`
CloneURL string `json:"clone_url"`
Owner struct {
Login string
}
}
// ForkRepo forks the repository on GitHub and returns the new repository
func ForkRepo(client *Client, repo ghrepo.Interface) (*Repository, error) {
path := fmt.Sprintf("repos/%s/forks", ghrepo.FullName(repo))
body := bytes.NewBufferString(`{}`)
result := repositoryV3{}
err := client.REST(repo.RepoHost(), "POST", path, body, &result)
if err != nil {
return nil, err
}
return &Repository{
ID: result.NodeID,
Name: result.Name,
CloneURL: result.CloneURL,
CreatedAt: result.CreatedAt,
Owner: RepositoryOwner{
Login: result.Owner.Login,
},
ViewerPermission: "WRITE",
hostname: repo.RepoHost(),
}, nil
}
// RepoFindForks finds forks of the repo that are affiliated with the viewer
func RepoFindForks(client *Client, repo ghrepo.Interface, limit int) ([]*Repository, error) {
result := struct {
Repository struct {
Forks struct {
Nodes []Repository
}
}
}{}
variables := map[string]interface{}{
"owner": repo.RepoOwner(),
"repo": repo.RepoName(),
"limit": limit,
}
if err := client.GraphQL(repo.RepoHost(), `
query RepositoryFindFork($owner: String!, $repo: String!, $limit: Int!) {
repository(owner: $owner, name: $repo) {
forks(first: $limit, affiliations: [OWNER, COLLABORATOR]) {
nodes {
id
name
owner { login }
url
viewerPermission
}
}
}
}
`, variables, &result); err != nil {
return nil, err
}
var results []*Repository
for _, r := range result.Repository.Forks.Nodes {
// we check ViewerCanPush, even though we expect it to always be true per
// `affiliations` condition, to guard against versions of GitHub with a
// faulty `affiliations` implementation
if !r.ViewerCanPush() {
continue
}
results = append(results, InitRepoHostname(&r, repo.RepoHost()))
}
return results, nil
}
type RepoMetadataResult struct {
AssignableUsers []RepoAssignee
Labels []RepoLabel
Projects []RepoProject
Milestones []RepoMilestone
Teams []OrgTeam
}
func (m *RepoMetadataResult) MembersToIDs(names []string) ([]string, error) {
var ids []string
for _, assigneeLogin := range names {
found := false
for _, u := range m.AssignableUsers {
if strings.EqualFold(assigneeLogin, u.Login) {
ids = append(ids, u.ID)
found = true
break
}
}
if !found {
return nil, fmt.Errorf("'%s' not found", assigneeLogin)
}
}
return ids, nil
}
func (m *RepoMetadataResult) TeamsToIDs(names []string) ([]string, error) {
var ids []string
for _, teamSlug := range names {
found := false
slug := teamSlug[strings.IndexRune(teamSlug, '/')+1:]
for _, t := range m.Teams {
if strings.EqualFold(slug, t.Slug) {
ids = append(ids, t.ID)
found = true
break
}
}
if !found {
return nil, fmt.Errorf("'%s' not found", teamSlug)
}
}
return ids, nil
}
func (m *RepoMetadataResult) LabelsToIDs(names []string) ([]string, error) {
var ids []string
for _, labelName := range names {
found := false
for _, l := range m.Labels {
if strings.EqualFold(labelName, l.Name) {
ids = append(ids, l.ID)
found = true
break
}
}
if !found {
return nil, fmt.Errorf("'%s' not found", labelName)
}
}
return ids, nil
}
func (m *RepoMetadataResult) ProjectsToIDs(names []string) ([]string, error) {
var ids []string
for _, projectName := range names {
found := false
for _, p := range m.Projects {
if strings.EqualFold(projectName, p.Name) {
ids = append(ids, p.ID)
found = true
break
}
}
if !found {
return nil, fmt.Errorf("'%s' not found", projectName)
}
}
return ids, nil
}
func (m *RepoMetadataResult) MilestoneToID(title string) (string, error) {
for _, m := range m.Milestones {
if strings.EqualFold(title, m.Title) {
return m.ID, nil
}
}
return "", errors.New("not found")
}
type RepoMetadataInput struct {
Assignees bool
Reviewers bool
Labels bool
Projects bool
Milestones bool
}
// RepoMetadata pre-fetches the metadata for attaching to issues and pull requests
func RepoMetadata(client *Client, repo ghrepo.Interface, input RepoMetadataInput) (*RepoMetadataResult, error) {
result := RepoMetadataResult{}
errc := make(chan error)
count := 0
if input.Assignees || input.Reviewers {
count++
go func() {
users, err := RepoAssignableUsers(client, repo)
if err != nil {
err = fmt.Errorf("error fetching assignees: %w", err)
}
result.AssignableUsers = users
errc <- err
}()
}
if input.Reviewers {
count++
go func() {
teams, err := OrganizationTeams(client, repo)
// TODO: better detection of non-org repos
if err != nil && !strings.HasPrefix(err.Error(), "Could not resolve to an Organization") {
errc <- fmt.Errorf("error fetching organization teams: %w", err)
return
}
result.Teams = teams
errc <- nil
}()
}
if input.Labels {
count++
go func() {
labels, err := RepoLabels(client, repo)
if err != nil {
err = fmt.Errorf("error fetching labels: %w", err)
}
result.Labels = labels
errc <- err
}()
}
if input.Projects {
count++
go func() {
projects, err := RepoProjects(client, repo)
if err != nil {
errc <- fmt.Errorf("error fetching projects: %w", err)
return
}
result.Projects = projects
orgProjects, err := OrganizationProjects(client, repo)
// TODO: better detection of non-org repos
if err != nil && !strings.HasPrefix(err.Error(), "Could not resolve to an Organization") {
errc <- fmt.Errorf("error fetching organization projects: %w", err)
return
}
result.Projects = append(result.Projects, orgProjects...)
errc <- nil
}()
}
if input.Milestones {
count++
go func() {
milestones, err := RepoMilestones(client, repo, "open")
if err != nil {
err = fmt.Errorf("error fetching milestones: %w", err)
}
result.Milestones = milestones
errc <- err
}()
}
var err error
for i := 0; i < count; i++ {
if e := <-errc; e != nil {
err = e
}
}
return &result, err
}
type RepoResolveInput struct {
Assignees []string
Reviewers []string
Labels []string
Projects []string
Milestones []string
}
// RepoResolveMetadataIDs looks up GraphQL node IDs in bulk
func RepoResolveMetadataIDs(client *Client, repo ghrepo.Interface, input RepoResolveInput) (*RepoMetadataResult, error) {
users := input.Assignees
hasUser := func(target string) bool {
for _, u := range users {
if strings.EqualFold(u, target) {
return true
}
}
return false
}
var teams []string
for _, r := range input.Reviewers {
if i := strings.IndexRune(r, '/'); i > -1 {
teams = append(teams, r[i+1:])
} else if !hasUser(r) {
users = append(users, r)
}
}
// there is no way to look up projects nor milestones by name, so preload them all
mi := RepoMetadataInput{
Projects: len(input.Projects) > 0,
Milestones: len(input.Milestones) > 0,
}
result, err := RepoMetadata(client, repo, mi)
if err != nil {
return result, err
}
if len(users) == 0 && len(teams) == 0 && len(input.Labels) == 0 {
return result, nil
}
query := &bytes.Buffer{}
fmt.Fprint(query, "query RepositoryResolveMetadataIDs {\n")
for i, u := range users {
fmt.Fprintf(query, "u%03d: user(login:%q){id,login}\n", i, u)
}
if len(input.Labels) > 0 {
fmt.Fprintf(query, "repository(owner:%q,name:%q){\n", repo.RepoOwner(), repo.RepoName())
for i, l := range input.Labels {
fmt.Fprintf(query, "l%03d: label(name:%q){id,name}\n", i, l)
}
fmt.Fprint(query, "}\n")
}
if len(teams) > 0 {
fmt.Fprintf(query, "organization(login:%q){\n", repo.RepoOwner())
for i, t := range teams {
fmt.Fprintf(query, "t%03d: team(slug:%q){id,slug}\n", i, t)
}
fmt.Fprint(query, "}\n")
}
fmt.Fprint(query, "}\n")
response := make(map[string]json.RawMessage)
err = client.GraphQL(repo.RepoHost(), query.String(), nil, &response)
if err != nil {
return result, err
}
for key, v := range response {
switch key {
case "repository":
repoResponse := make(map[string]RepoLabel)
err := json.Unmarshal(v, &repoResponse)
if err != nil {
return result, err
}
for _, l := range repoResponse {
result.Labels = append(result.Labels, l)
}
case "organization":
orgResponse := make(map[string]OrgTeam)
err := json.Unmarshal(v, &orgResponse)
if err != nil {
return result, err
}
for _, t := range orgResponse {
result.Teams = append(result.Teams, t)
}
default:
user := RepoAssignee{}
err := json.Unmarshal(v, &user)
if err != nil {
return result, err
}
result.AssignableUsers = append(result.AssignableUsers, user)
}
}
return result, nil
}
type RepoProject struct {
ID string
Name string
}
// RepoProjects fetches all open projects for a repository
func RepoProjects(client *Client, repo ghrepo.Interface) ([]RepoProject, error) {
type responseData struct {
Repository struct {
Projects struct {
Nodes []RepoProject
PageInfo struct {
HasNextPage bool
EndCursor string
}
} `graphql:"projects(states: [OPEN], first: 100, orderBy: {field: NAME, direction: ASC}, after: $endCursor)"`
} `graphql:"repository(owner: $owner, name: $name)"`
}
variables := map[string]interface{}{
"owner": githubv4.String(repo.RepoOwner()),
"name": githubv4.String(repo.RepoName()),
"endCursor": (*githubv4.String)(nil),
}
gql := graphQLClient(client.http, repo.RepoHost())
var projects []RepoProject
for {
var query responseData
err := gql.QueryNamed(context.Background(), "RepositoryProjectList", &query, variables)
if err != nil {
return nil, err
}
projects = append(projects, query.Repository.Projects.Nodes...)
if !query.Repository.Projects.PageInfo.HasNextPage {
break
}
variables["endCursor"] = githubv4.String(query.Repository.Projects.PageInfo.EndCursor)
}
return projects, nil
}
type RepoAssignee struct {
ID string
Login string
}
// RepoAssignableUsers fetches all the assignable users for a repository
func RepoAssignableUsers(client *Client, repo ghrepo.Interface) ([]RepoAssignee, error) {
type responseData struct {
Repository struct {
AssignableUsers struct {
Nodes []RepoAssignee
PageInfo struct {
HasNextPage bool
EndCursor string
}
} `graphql:"assignableUsers(first: 100, after: $endCursor)"`
} `graphql:"repository(owner: $owner, name: $name)"`
}
variables := map[string]interface{}{
"owner": githubv4.String(repo.RepoOwner()),
"name": githubv4.String(repo.RepoName()),
"endCursor": (*githubv4.String)(nil),
}
gql := graphQLClient(client.http, repo.RepoHost())
var users []RepoAssignee
for {
var query responseData
err := gql.QueryNamed(context.Background(), "RepositoryAssignableUsers", &query, variables)
if err != nil {
return nil, err
}
users = append(users, query.Repository.AssignableUsers.Nodes...)
if !query.Repository.AssignableUsers.PageInfo.HasNextPage {
break
}
variables["endCursor"] = githubv4.String(query.Repository.AssignableUsers.PageInfo.EndCursor)
}
return users, nil
}
type RepoLabel struct {
ID string
Name string
}
// RepoLabels fetches all the labels in a repository
func RepoLabels(client *Client, repo ghrepo.Interface) ([]RepoLabel, error) {
type responseData struct {
Repository struct {
Labels struct {
Nodes []RepoLabel
PageInfo struct {
HasNextPage bool
EndCursor string
}
} `graphql:"labels(first: 100, orderBy: {field: NAME, direction: ASC}, after: $endCursor)"`
} `graphql:"repository(owner: $owner, name: $name)"`
}
variables := map[string]interface{}{
"owner": githubv4.String(repo.RepoOwner()),
"name": githubv4.String(repo.RepoName()),
"endCursor": (*githubv4.String)(nil),
}
gql := graphQLClient(client.http, repo.RepoHost())
var labels []RepoLabel
for {
var query responseData
err := gql.QueryNamed(context.Background(), "RepositoryLabelList", &query, variables)
if err != nil {
return nil, err
}
labels = append(labels, query.Repository.Labels.Nodes...)
if !query.Repository.Labels.PageInfo.HasNextPage {
break
}
variables["endCursor"] = githubv4.String(query.Repository.Labels.PageInfo.EndCursor)
}
return labels, nil
}
type RepoMilestone struct {
ID string
Title string
}
// RepoMilestones fetches milestones in a repository
func RepoMilestones(client *Client, repo ghrepo.Interface, state string) ([]RepoMilestone, error) {
type responseData struct {
Repository struct {
Milestones struct {
Nodes []RepoMilestone
PageInfo struct {
HasNextPage bool
EndCursor string
}
} `graphql:"milestones(states: $states, first: 100, after: $endCursor)"`
} `graphql:"repository(owner: $owner, name: $name)"`
}
var states []githubv4.MilestoneState
switch state {
case "open":
states = []githubv4.MilestoneState{"OPEN"}
case "closed":
states = []githubv4.MilestoneState{"CLOSED"}
case "all":
states = []githubv4.MilestoneState{"OPEN", "CLOSED"}
default:
return nil, fmt.Errorf("invalid state: %s", state)
}
variables := map[string]interface{}{
"owner": githubv4.String(repo.RepoOwner()),
"name": githubv4.String(repo.RepoName()),
"states": states,
"endCursor": (*githubv4.String)(nil),
}
gql := graphQLClient(client.http, repo.RepoHost())
var milestones []RepoMilestone
for {
var query responseData
err := gql.QueryNamed(context.Background(), "RepositoryMilestoneList", &query, variables)
if err != nil {
return nil, err
}
milestones = append(milestones, query.Repository.Milestones.Nodes...)
if !query.Repository.Milestones.PageInfo.HasNextPage {
break
}
variables["endCursor"] = githubv4.String(query.Repository.Milestones.PageInfo.EndCursor)
}
return milestones, nil
}
func MilestoneByTitle(client *Client, repo ghrepo.Interface, state, title string) (*RepoMilestone, error) {
milestones, err := RepoMilestones(client, repo, state)
if err != nil {
return nil, err
}
for i := range milestones {
if strings.EqualFold(milestones[i].Title, title) {
return &milestones[i], nil
}
}
return nil, fmt.Errorf("no milestone found with title %q", title)
}
func MilestoneByNumber(client *Client, repo ghrepo.Interface, number int32) (*RepoMilestone, error) {
var query struct {
Repository struct {
Milestone *RepoMilestone `graphql:"milestone(number: $number)"`
} `graphql:"repository(owner: $owner, name: $name)"`
}
variables := map[string]interface{}{
"owner": githubv4.String(repo.RepoOwner()),
"name": githubv4.String(repo.RepoName()),
"number": githubv4.Int(number),
}
gql := graphQLClient(client.http, repo.RepoHost())
err := gql.QueryNamed(context.Background(), "RepositoryMilestoneByNumber", &query, variables)
if err != nil {
return nil, err
}
if query.Repository.Milestone == nil {
return nil, fmt.Errorf("no milestone found with number '%d'", number)
}
return query.Repository.Milestone, nil
}