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Copy pathcontext.go
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270 lines (231 loc) · 6.42 KB
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package context
import (
"errors"
"fmt"
"sort"
"github.com/cli/cli/api"
"github.com/cli/cli/git"
"github.com/cli/cli/internal/config"
"github.com/cli/cli/internal/ghrepo"
)
// TODO these are sprinkled across command, context, config, and ghrepo
const defaultHostname = "github.com"
// Context represents the interface for querying information about the current environment
type Context interface {
AuthToken() (string, error)
SetAuthToken(string)
AuthLogin() (string, error)
Branch() (string, error)
SetBranch(string)
Remotes() (Remotes, error)
BaseRepo() (ghrepo.Interface, error)
SetBaseRepo(string)
Config() (config.Config, error)
}
// cap the number of git remotes looked up, since the user might have an
// unusually large number of git remotes
const maxRemotesForLookup = 5
func ResolveRemotesToRepos(remotes Remotes, client *api.Client, base string) (ResolvedRemotes, error) {
sort.Stable(remotes)
lenRemotesForLookup := len(remotes)
if lenRemotesForLookup > maxRemotesForLookup {
lenRemotesForLookup = maxRemotesForLookup
}
hasBaseOverride := base != ""
baseOverride := ghrepo.FromFullName(base)
foundBaseOverride := false
repos := make([]ghrepo.Interface, 0, lenRemotesForLookup)
for _, r := range remotes[:lenRemotesForLookup] {
repos = append(repos, r)
if ghrepo.IsSame(r, baseOverride) {
foundBaseOverride = true
}
}
if hasBaseOverride && !foundBaseOverride {
// additionally, look up the explicitly specified base repo if it's not
// already covered by git remotes
repos = append(repos, baseOverride)
}
result := ResolvedRemotes{
Remotes: remotes,
apiClient: client,
}
if hasBaseOverride {
result.BaseOverride = baseOverride
}
networkResult, err := api.RepoNetwork(client, repos)
if err != nil {
return result, err
}
result.Network = networkResult
return result, nil
}
type ResolvedRemotes struct {
BaseOverride ghrepo.Interface
Remotes Remotes
Network api.RepoNetworkResult
apiClient *api.Client
}
// BaseRepo is the first found repository in the "upstream", "github", "origin"
// git remote order, resolved to the parent repo if the git remote points to a fork
func (r ResolvedRemotes) BaseRepo() (*api.Repository, error) {
if r.BaseOverride != nil {
for _, repo := range r.Network.Repositories {
if repo != nil && ghrepo.IsSame(repo, r.BaseOverride) {
return repo, nil
}
}
return nil, fmt.Errorf("failed looking up information about the '%s' repository",
ghrepo.FullName(r.BaseOverride))
}
for _, repo := range r.Network.Repositories {
if repo == nil {
continue
}
if repo.IsFork() {
return repo.Parent, nil
}
return repo, nil
}
return nil, errors.New("not found")
}
// HeadRepo is a fork of base repo (if any), or the first found repository that
// has push access
func (r ResolvedRemotes) HeadRepo() (*api.Repository, error) {
baseRepo, err := r.BaseRepo()
if err != nil {
return nil, err
}
// try to find a pushable fork among existing remotes
for _, repo := range r.Network.Repositories {
if repo != nil && repo.Parent != nil && repo.ViewerCanPush() && ghrepo.IsSame(repo.Parent, baseRepo) {
return repo, nil
}
}
// a fork might still exist on GitHub, so let's query for it
var notFound *api.NotFoundError
if repo, err := api.RepoFindFork(r.apiClient, baseRepo); err == nil {
return repo, nil
} else if !errors.As(err, ¬Found) {
return nil, err
}
// fall back to any listed repository that has push access
for _, repo := range r.Network.Repositories {
if repo != nil && repo.ViewerCanPush() {
return repo, nil
}
}
return nil, errors.New("none of the repositories have push access")
}
// RemoteForRepo finds the git remote that points to a repository
func (r ResolvedRemotes) RemoteForRepo(repo ghrepo.Interface) (*Remote, error) {
for i, remote := range r.Remotes {
if ghrepo.IsSame(remote, repo) ||
// additionally, look up the resolved repository name in case this
// git remote points to this repository via a redirect
(r.Network.Repositories[i] != nil && ghrepo.IsSame(r.Network.Repositories[i], repo)) {
return remote, nil
}
}
return nil, errors.New("not found")
}
// New initializes a Context that reads from the filesystem
func New() Context {
return &fsContext{}
}
// A Context implementation that queries the filesystem
type fsContext struct {
config config.Config
remotes Remotes
branch string
baseRepo ghrepo.Interface
authToken string
}
func (c *fsContext) Config() (config.Config, error) {
if c.config == nil {
config, err := config.ParseOrSetupConfigFile(config.ConfigFile())
if err != nil {
return nil, err
}
c.config = config
c.authToken = ""
}
return c.config, nil
}
func (c *fsContext) AuthToken() (string, error) {
if c.authToken != "" {
return c.authToken, nil
}
cfg, err := c.Config()
if err != nil {
return "", err
}
token, err := cfg.Get(defaultHostname, "oauth_token")
if token == "" || err != nil {
return "", err
}
return token, nil
}
func (c *fsContext) SetAuthToken(t string) {
c.authToken = t
}
func (c *fsContext) AuthLogin() (string, error) {
config, err := c.Config()
if err != nil {
return "", err
}
login, err := config.Get(defaultHostname, "user")
if login == "" || err != nil {
return "", err
}
return login, nil
}
func (c *fsContext) Branch() (string, error) {
if c.branch != "" {
return c.branch, nil
}
currentBranch, err := git.CurrentBranch()
if err != nil {
return "", fmt.Errorf("could not determine current branch: %w", err)
}
c.branch = currentBranch
return c.branch, nil
}
func (c *fsContext) SetBranch(b string) {
c.branch = b
}
func (c *fsContext) Remotes() (Remotes, error) {
if c.remotes == nil {
gitRemotes, err := git.Remotes()
if err != nil {
return nil, err
}
if len(gitRemotes) == 0 {
return nil, errors.New("no git remotes found")
}
sshTranslate := git.ParseSSHConfig().Translator()
c.remotes = translateRemotes(gitRemotes, sshTranslate)
}
if len(c.remotes) == 0 {
return nil, errors.New("no git remote found for a github.com repository")
}
return c.remotes, nil
}
func (c *fsContext) BaseRepo() (ghrepo.Interface, error) {
if c.baseRepo != nil {
return c.baseRepo, nil
}
remotes, err := c.Remotes()
if err != nil {
return nil, err
}
rem, err := remotes.FindByName("upstream", "github", "origin", "*")
if err != nil {
return nil, err
}
c.baseRepo = rem
return c.baseRepo, nil
}
func (c *fsContext) SetBaseRepo(nwo string) {
c.baseRepo = ghrepo.FromFullName(nwo)
}