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package commands
import (
"fmt"
"io"
"os"
"github.com/spf13/cobra"
"github.com/MichaelMure/git-bug/bug"
"github.com/MichaelMure/git-bug/cache"
"github.com/MichaelMure/git-bug/identity"
"github.com/MichaelMure/git-bug/repository"
"github.com/MichaelMure/git-bug/util/interrupt"
)
// Env is the environment of a command
type Env struct {
repo repository.ClockedRepo
backend *cache.RepoCache
out out
err out
}
func newEnv() *Env {
return &Env{
repo: nil,
out: out{Writer: os.Stdout},
err: out{Writer: os.Stderr},
}
}
type out struct {
io.Writer
}
func (o out) Printf(format string, a ...interface{}) {
_, _ = fmt.Fprintf(o, format, a...)
}
func (o out) Print(a ...interface{}) {
_, _ = fmt.Fprint(o, a...)
}
func (o out) Println(a ...interface{}) {
_, _ = fmt.Fprintln(o, a...)
}
// loadRepo is a pre-run function that load the repository for use in a command
func loadRepo(env *Env) func(*cobra.Command, []string) error {
return func(cmd *cobra.Command, args []string) error {
cwd, err := os.Getwd()
if err != nil {
return fmt.Errorf("unable to get the current working directory: %q", err)
}
env.repo, err = repository.OpenGoGitRepo(cwd, []repository.ClockLoader{bug.ClockLoader})
if err == repository.ErrNotARepo {
return fmt.Errorf("%s must be run from within a git repo", rootCommandName)
}
if err != nil {
return err
}
return nil
}
}
// loadRepoEnsureUser is the same as loadRepo, but also ensure that the user has configured
// an identity. Use this pre-run function when an error after using the configured user won't
// do.
func loadRepoEnsureUser(env *Env) func(*cobra.Command, []string) error {
return func(cmd *cobra.Command, args []string) error {
err := loadRepo(env)(cmd, args)
if err != nil {
return err
}
_, err = identity.GetUserIdentity(env.repo)
if err != nil {
return err
}
return nil
}
}
// loadBackend is a pre-run function that load the repository and the backend for use in a command
// When using this function you also need to use closeBackend as a post-run
func loadBackend(env *Env) func(*cobra.Command, []string) error {
return func(cmd *cobra.Command, args []string) error {
err := loadRepo(env)(cmd, args)
if err != nil {
return err
}
env.backend, err = cache.NewRepoCache(env.repo)
if err != nil {
return err
}
cleaner := func(env *Env) interrupt.CleanerFunc {
return func() error {
if env.backend != nil {
err := env.backend.Close()
env.backend = nil
return err
}
return nil
}
}
// Cleanup properly on interrupt
interrupt.RegisterCleaner(cleaner(env))
return nil
}
}
// loadBackendEnsureUser is the same as loadBackend, but also ensure that the user has configured
// an identity. Use this pre-run function when an error after using the configured user won't
// do.
func loadBackendEnsureUser(env *Env) func(*cobra.Command, []string) error {
return func(cmd *cobra.Command, args []string) error {
err := loadBackend(env)(cmd, args)
if err != nil {
return err
}
_, err = identity.GetUserIdentity(env.repo)
if err != nil {
return err
}
return nil
}
}
// closeBackend is a post-run function that will close the backend properly
// if it has been opened.
func closeBackend(env *Env) func(*cobra.Command, []string) error {
return func(cmd *cobra.Command, args []string) error {
if env.backend == nil {
return nil
}
err := env.backend.Close()
env.backend = nil
return err
}
}
|
