Release

internal/git/git.go

@@ -82,3 +82,36 @@ func TagExists(dir, tag string) (bool, error) {
 	}
 	return strings.TrimSpace(out) == tag, nil
 }
+
+// BranchExists returns true if the given local branch exists.
+func BranchExists(dir, branch string) (bool, error) {
+	out, err := Run(dir, "branch", "--list", branch)
+	if err != nil {
+		return false, err
+	}
+	return strings.TrimSpace(out) != "", nil
+}
+
+// CheckoutBranch checks out an existing branch.
+func CheckoutBranch(dir, branch string) error {
+	_, err := Run(dir, "checkout", branch)
+	return err
+}
+
+// CheckoutNewBranch creates and checks out a new branch from the given base.
+func CheckoutNewBranch(dir, branch, base string) error {
+	_, err := Run(dir, "checkout", "-B", branch, base)
+	return err
+}
+
+// PushBranch force-pushes a branch to origin.
+func PushBranch(dir, branch string) error {
+	_, err := Run(dir, "push", "--force-with-lease", "origin", branch)
+	return err
+}
+
+// FetchOrigin fetches from origin.
+func FetchOrigin(dir string) error {
+	_, err := Run(dir, "fetch", "origin")
+	return err
+}