vim-patch:8.1.1610: there is no way to add or load a buffer without side effects

Problem:    There is no way to add or load a buffer without side effects.
Solution:   Add the bufadd() and bufload() functions.
https://github.com/vim/vim/commit/15e248e37f3925d430f96e945d52d3dc423cdc83

1 files changed, 21 insertions, 0 deletions

diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 1935478f15..659f957fd1 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -7289,6 +7289,12 @@ static buf_T *find_buffer(typval_T *avar)
   return buf;
 }
 
+// "bufadd(expr)" function
+static void f_bufadd(typval_T *argvars, typval_T *rettv, FunPtr fptr)
+{
+  rettv->vval.v_number = buflist_add(tv_get_string(&argvars[0]), 0);
+}
+
 /*
  * "bufexists(expr)" function
  */
@@ -7308,6 +7314,21 @@ static void f_buflisted(typval_T *argvars, typval_T *rettv, FunPtr fptr)
   rettv->vval.v_number = (buf != NULL && buf->b_p_bl);
 }
 
+// "bufload(expr)" function
+static void f_bufload(typval_T *argvars, typval_T *rettv unused)
+{
+  buf_T *buf = get_buf_arg(&argvars[0]);
+
+  if (buf != NULL && buf->b_ml.ml_mfp == NULL) {
+    aco_save_T aco;
+
+    aucmd_prepbuf(&aco, buf);
+    swap_exists_action = SEA_NONE;
+    open_buffer(FALSE, NULL, 0);
+    aucmd_restbuf(&aco);
+  }
+}
+
 /*
  * "bufloaded(expr)" function
  */