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tea/modules/context/context.go

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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package context
import (
"errors"
"fmt"
"log"
"os"
"path"
"strings"
"code.gitea.io/sdk/gitea"
"code.gitea.io/tea/modules/config"
"code.gitea.io/tea/modules/git"
"code.gitea.io/tea/modules/utils"
gogit "github.com/go-git/go-git/v5"
"github.com/urfave/cli/v2"
)
var (
errNotAGiteaRepo = errors.New("No Gitea login found. You might want to specify --repo (and --login) to work outside of a repository")
)
// TeaContext contains all context derived during command initialization and wraps cli.Context
type TeaContext struct {
*cli.Context
Login *config.Login // config data & client for selected login
RepoSlug string // <owner>/<repo>, optional
Owner string // repo owner as derived from context or provided in flag, optional
Repo string // repo name as derived from context or provided in flag, optional
Output string // value of output flag
LocalRepo *git.TeaRepo // is set if flags specified a local repo via --repo, or if $PWD is a git repo
}
// GetListOptions return ListOptions based on PaginationFlags
func (ctx *TeaContext) GetListOptions() gitea.ListOptions {
page := ctx.Int("page")
limit := ctx.Int("limit")
if limit < 0 {
limit = 0
}
if limit != 0 && page == 0 {
page = 1
}
return gitea.ListOptions{
Page: page,
PageSize: limit,
}
}
// GetRemoteRepoHTMLURL returns the web-ui url of the remote repo,
// after ensuring a remote repo is present in the context.
func (ctx *TeaContext) GetRemoteRepoHTMLURL() string {
ctx.Ensure(CtxRequirement{RemoteRepo: true})
return path.Join(ctx.Login.URL, ctx.Owner, ctx.Repo)
}
// Ensure checks if requirements on the context are set, and terminates otherwise.
func (ctx *TeaContext) Ensure(req CtxRequirement) {
if req.LocalRepo && ctx.LocalRepo == nil {
fmt.Println("Local repository required: Execute from a repo dir, or specify a path with --repo.")
os.Exit(1)
}
if req.RemoteRepo && len(ctx.RepoSlug) == 0 {
fmt.Println("Remote repository required: Specify ID via --repo or execute from a local git repo.")
os.Exit(1)
}
}
// CtxRequirement specifies context needed for operation
type CtxRequirement struct {
// ensures a local git repo is available & ctx.LocalRepo is set. Implies .RemoteRepo
LocalRepo bool
// ensures ctx.RepoSlug, .Owner, .Repo are set
RemoteRepo bool
}
// InitCommand resolves the application context, and returns the active login, and if
// available the repo slug. It does this by reading the config file for logins, parsing
// the remotes of the .git repo specified in repoFlag or $PWD, and using overrides from
// command flags. If a local git repo can't be found, repo slug values are unset.
func InitCommand(ctx *cli.Context) *TeaContext {
// these flags are used as overrides to the context detection via local git repo
repoFlag := ctx.String("repo")
loginFlag := ctx.String("login")
remoteFlag := ctx.String("remote")
var (
c TeaContext
err error
repoPath string // empty means PWD
repoFlagPathExists bool
)
// check if repoFlag can be interpreted as path to local repo.
if len(repoFlag) != 0 {
if repoFlagPathExists, err = utils.DirExists(repoFlag); err != nil {
log.Fatal(err.Error())
}
if repoFlagPathExists {
repoPath = repoFlag
}
}
if len(remoteFlag) == 0 {
remoteFlag = config.GetPreferences().FlagDefaults.Remote
}
// try to read local git repo & extract context: if repoFlag specifies a valid path, read repo in that dir,
// otherwise attempt PWD. if no repo is found, continue with default login
if c.LocalRepo, c.Login, c.RepoSlug, err = contextFromLocalRepo(repoPath, remoteFlag); err != nil {
if err == errNotAGiteaRepo || err == gogit.ErrRepositoryNotExists {
// we can deal with that, commands needing the optional values use ctx.Ensure()
} else {
log.Fatal(err.Error())
}
}
if len(repoFlag) != 0 && !repoFlagPathExists {
// if repoFlag is not a valid path, use it to override repoSlug
c.RepoSlug = repoFlag
}
// override login from flag, or use default login if repo based detection failed
if len(loginFlag) != 0 {
c.Login = config.GetLoginByName(loginFlag)
if c.Login == nil {
log.Fatalf("Login name '%s' does not exist", loginFlag)
}
} else if c.Login == nil {
if c.Login, err = config.GetDefaultLogin(); err != nil {
if err.Error() == "No available login" {
// TODO: maybe we can directly start interact.CreateLogin() (only if
// we're sure we can interactively!), as gh cli does.
fmt.Println(`No gitea login configured. To start using tea, first run
tea login add
and then run your command again.`)
}
os.Exit(1)
}
fmt.Printf("NOTE: no gitea login detected, falling back to login '%s'\n", c.Login.Name)
}
// parse reposlug (owner falling back to login owner if reposlug contains only repo name)
c.Owner, c.Repo = utils.GetOwnerAndRepo(c.RepoSlug, c.Login.User)
c.Context = ctx
c.Output = ctx.String("output")
return &c
}
// contextFromLocalRepo discovers login & repo slug from the default branch remote of the given local repo
func contextFromLocalRepo(repoPath, remoteValue string) (*git.TeaRepo, *config.Login, string, error) {
repo, err := git.RepoFromPath(repoPath)
if err != nil {
return nil, nil, "", err
}
gitConfig, err := repo.Config()
if err != nil {
return repo, nil, "", err
}
if len(gitConfig.Remotes) == 0 {
return repo, nil, "", errNotAGiteaRepo
}
// When no preferred value is given, choose a remote to find a
// matching login based on its URL.
if len(gitConfig.Remotes) > 1 && len(remoteValue) == 0 {
// if master branch is present, use it as the default remote
mainBranches := []string{"main", "master", "trunk"}
for _, b := range mainBranches {
masterBranch, ok := gitConfig.Branches[b]
if ok {
if len(masterBranch.Remote) > 0 {
remoteValue = masterBranch.Remote
}
break
}
}
// if no branch has matched, default to origin or upstream remote.
if len(remoteValue) == 0 {
if _, ok := gitConfig.Remotes["upstream"]; ok {
remoteValue = "upstream"
} else if _, ok := gitConfig.Remotes["origin"]; ok {
remoteValue = "origin"
}
}
}
// make sure a remote is selected
if len(remoteValue) == 0 {
for remote := range gitConfig.Remotes {
remoteValue = remote
break
}
}
remoteConfig, ok := gitConfig.Remotes[remoteValue]
if !ok || remoteConfig == nil {
return repo, nil, "", fmt.Errorf("Remote '%s' not found in this Git repository", remoteValue)
}
logins, err := config.GetLogins()
if err != nil {
return repo, nil, "", err
}
for _, l := range logins {
sshHost := l.GetSSHHost()
for _, u := range remoteConfig.URLs {
p, err := git.ParseURL(u)
if err != nil {
return repo, nil, "", fmt.Errorf("Git remote URL parse failed: %s", err.Error())
}
if strings.EqualFold(p.Scheme, "http") || strings.EqualFold(p.Scheme, "https") {
if strings.HasPrefix(u, l.URL) {
ps := strings.Split(p.Path, "/")
path := strings.Join(ps[len(ps)-2:], "/")
return repo, &l, strings.TrimSuffix(path, ".git"), nil
}
} else if strings.EqualFold(p.Scheme, "ssh") {
if sshHost == p.Host {
return repo, &l, strings.TrimLeft(p.Path, "/"), nil
}
}
}
}
return repo, nil, "", errNotAGiteaRepo
}