95 lines
2.1 KiB
Go
95 lines
2.1 KiB
Go
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package git
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import (
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"fmt"
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"github.com/rubyist/tracerx"
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)
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type RefUpdate struct {
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git Env
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remote string
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left *Ref
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right *Ref
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}
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func NewRefUpdate(g Env, remote string, l, r *Ref) *RefUpdate {
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return &RefUpdate{
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git: g,
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remote: remote,
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left: l,
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right: r,
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}
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}
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func (u *RefUpdate) Left() *Ref {
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return u.left
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}
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func (u *RefUpdate) LeftCommitish() string {
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return refCommitish(u.Left())
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}
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func (u *RefUpdate) Right() *Ref {
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if u.right == nil {
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u.right = defaultRemoteRef(u.git, u.remote, u.Left())
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}
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return u.right
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}
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// defaultRemoteRef returns the remote ref receiving a push based on the current
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// repository config and local ref being pushed.
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//
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// See push.default rules in https://git-scm.com/docs/git-config
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func defaultRemoteRef(g Env, remote string, left *Ref) *Ref {
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pushMode, _ := g.Get("push.default")
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switch pushMode {
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case "", "simple":
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brRemote, _ := g.Get(fmt.Sprintf("branch.%s.remote", left.Name))
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if brRemote == remote {
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// in centralized workflow, work like 'upstream' with an added safety to
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// refuse to push if the upstream branch’s name is different from the
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// local one.
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return trackingRef(g, left)
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}
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// When pushing to a remote that is different from the remote you normally
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// pull from, work as current.
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return left
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case "upstream", "tracking":
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// push the current branch back to the branch whose changes are usually
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// integrated into the current branch
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return trackingRef(g, left)
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case "current":
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// push the current branch to update a branch with the same name on the
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// receiving end.
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return left
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default:
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tracerx.Printf("WARNING: %q push mode not supported", pushMode)
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return left
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}
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}
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func trackingRef(g Env, left *Ref) *Ref {
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if merge, ok := g.Get(fmt.Sprintf("branch.%s.merge", left.Name)); ok {
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return ParseRef(merge, "")
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}
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return left
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}
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func (u *RefUpdate) RightCommitish() string {
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return refCommitish(u.Right())
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}
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func refCommitish(r *Ref) string {
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if len(r.Sha) > 0 {
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return r.Sha
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}
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return r.Name
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}
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// copy of env
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type Env interface {
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Get(key string) (val string, ok bool)
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}
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