checkout by rev hash

[CMGS]

I edit checkout.go and add CheckoutTree method blow, but I don't know why the repo didn't changed after successful execute it.

func (v *Repository) CheckoutTree(treeish string, opts *CheckoutOpts) error {
    var copts C.git_checkout_options
    ptr := populateCheckoutOpts(&copts, opts)

    obj, err := v.RevparseSingle(treeish)
    if err != nil {
        return err
    }
    defer obj.Free()

    commit, err := v.LookupCommit(obj.Id())
    if err != nil {
        return err
    }

    tree, err := commit.Tree()
    if err != nil {
        return err
    }

    runtime.LockOSThread()
    defer runtime.UnlockOSThread()

    ret := C.git_checkout_tree(v.ptr, tree.ptr, ptr)
    if ret < 0 {
        return MakeGitError(ret)
    }

    return nil
}

[carlosmn]

Without more context, there's no way to know. How are you checking if there's a change? The PR you submitted does not contain tests. Are you trying to checkout files from different trees or always just the current one? You wouldn't see differences in that case.

[CMGS]

It's my fault, checkout_tree method will checkout repo with DRY_RUN Strategy as default. I want to simulate git checkout version to switch master branch to a new version based branch. In this case, just call method with force strategy.