func createSnapshot(ctx *tool.Context, snapshotDir, snapshotFile, label string) error {
// Create a snapshot that encodes the current state of master
// branches for all local projects.
if err := project.CreateSnapshot(ctx, snapshotFile); err != nil {
return err
}
// Update the symlink for this snapshot label to point to the
// latest snapshot.
symlink := filepath.Join(snapshotDir, label)
newSymlink := symlink + ".new"
if err := ctx.Run().RemoveAll(newSymlink); err != nil {
return err
}
relativeSnapshotPath := strings.TrimPrefix(snapshotFile, snapshotDir+string(os.PathSeparator))
if err := ctx.Run().Symlink(relativeSnapshotPath, newSymlink); err != nil {
return err
}
if err := ctx.Run().Rename(newSymlink, symlink); err != nil {
return err
}
// Revision the changes.
if err := revisionChanges(ctx, snapshotDir, snapshotFile, label); err != nil {
return err
}
return nil
}
func createSnapshot(jirix *jiri.X, snapshotDir, snapshotFile, label string) error {
// Create a snapshot that encodes the current state of master
// branches for all local projects.
if err := project.CreateSnapshot(jirix, snapshotFile, ""); err != nil {
return err
}
s := jirix.NewSeq()
// Update the symlink for this snapshot label to point to the
// latest snapshot.
symlink := filepath.Join(snapshotDir, label)
newSymlink := symlink + ".new"
relativeSnapshotPath := strings.TrimPrefix(snapshotFile, snapshotDir+string(os.PathSeparator))
return s.RemoveAll(newSymlink).
Symlink(relativeSnapshotPath, newSymlink).
Rename(newSymlink, symlink).Done()
}
func runUpdate(env *cmdline.Env, _ []string) error {
ctx := tool.NewContextFromEnv(env)
// Create a snapshot of the current state of all projects and
// write it to the $JIRI_ROOT/.update_history folder.
root, err := project.JiriRoot()
if err != nil {
return err
}
snapshotFile := filepath.Join(root, ".update_history", time.Now().Format(time.RFC3339))
if err := project.CreateSnapshot(ctx, snapshotFile); err != nil {
return err
}
// Update all projects to their latest version.
// Attempt <attemptsFlag> times before failing.
updateFn := func() error {
return project.UpdateUniverse(ctx, gcFlag)
}
return retry.Function(ctx, updateFn, retry.AttemptsOpt(attemptsFlag))
}