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|
package git
import (
"errors"
"gopkg.in/src-d/go-git.v4/config"
"gopkg.in/src-d/go-git.v4/plumbing"
)
var (
ErrSubmoduleAlreadyInitialized = errors.New("submodule already initialized")
ErrSubmoduleNotInitialized = errors.New("submodule not initialized")
)
// Submodule a submodule allows you to keep another Git repository in a
// subdirectory of your repository.
type Submodule struct {
initialized bool
c *config.Submodule
w *Worktree
}
// Config returns the submodule config
func (s *Submodule) Config() *config.Submodule {
return s.c
}
// Init initialize the submodule reading the recoreded Entry in the index for
// the given submodule
func (s *Submodule) Init() error {
cfg, err := s.w.r.Storer.Config()
if err != nil {
return err
}
_, ok := cfg.Submodules[s.c.Name]
if ok {
return ErrSubmoduleAlreadyInitialized
}
s.initialized = true
cfg.Submodules[s.c.Name] = s.c
return s.w.r.Storer.SetConfig(cfg)
}
// Repository returns the Repository represented by this submodule
func (s *Submodule) Repository() (*Repository, error) {
storer, err := s.w.r.Storer.Module(s.c.Name)
if err != nil {
return nil, err
}
_, err = storer.Reference(plumbing.HEAD)
if err != nil && err != plumbing.ErrReferenceNotFound {
return nil, err
}
worktree := s.w.fs.Dir(s.c.Path)
if err == nil {
return Open(storer, worktree)
}
r, err := Init(storer, worktree)
if err != nil {
return nil, err
}
_, err = r.CreateRemote(&config.RemoteConfig{
Name: DefaultRemoteName,
URL: s.c.URL,
})
return r, err
}
// Update the registered submodule to match what the superproject expects, the
// submodule should be initilized first calling the Init method or setting in
// the options SubmoduleUpdateOptions.Init equals true
func (s *Submodule) Update(o *SubmoduleUpdateOptions) error {
if !s.initialized && !o.Init {
return ErrSubmoduleNotInitialized
}
if !s.initialized && o.Init {
if err := s.Init(); err != nil {
return err
}
}
e, err := s.w.readIndexEntry(s.c.Path)
if err != nil {
return err
}
r, err := s.Repository()
if err != nil {
return err
}
if err := s.fetchAndCheckout(r, o, e.Hash); err != nil {
return err
}
return s.doRecursiveUpdate(r, o)
}
func (s *Submodule) doRecursiveUpdate(r *Repository, o *SubmoduleUpdateOptions) error {
if o.RecurseSubmodules == NoRecurseSubmodules {
return nil
}
w, err := r.Worktree()
if err != nil {
return err
}
l, err := w.Submodules()
if err != nil {
return err
}
new := &SubmoduleUpdateOptions{}
*new = *o
new.RecurseSubmodules--
return l.Update(new)
}
func (s *Submodule) fetchAndCheckout(r *Repository, o *SubmoduleUpdateOptions, hash plumbing.Hash) error {
if !o.NoFetch {
err := r.Fetch(&FetchOptions{})
if err != nil && err != NoErrAlreadyUpToDate {
return err
}
}
w, err := r.Worktree()
if err != nil {
return err
}
if err := w.Checkout(&CheckoutOptions{Hash: hash}); err != nil {
return err
}
head := plumbing.NewHashReference(plumbing.HEAD, hash)
return r.Storer.SetReference(head)
}
// Submodules list of several submodules from the same repository
type Submodules []*Submodule
// Init initializes the submodules in this list
func (s Submodules) Init() error {
for _, sub := range s {
if err := sub.Init(); err != nil {
return err
}
}
return nil
}
// Update updates all the submodules in this list
func (s Submodules) Update(o *SubmoduleUpdateOptions) error {
for _, sub := range s {
if err := sub.Update(o); err != nil {
return err
}
}
return nil
}
|
