provider: has("python3_dynamic") et al. #10980

Vim added more flags for testing yet more dimensions of its Python
situation.  Handle those in eval_has_provider().

vim-patch:8.0.1436: not enough information about what Python version may work
Problem:    Not enough information about what Python version may work.
Solution:   Add "python_compiled", "python3_compiled", "python_dynamic" and
            "python3_dynamic" values for has().

ref: https://github.com/neovim/neovim/pull/10942#issuecomment-529479500

1 files changed, 17 insertions, 11 deletions

diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 0aa0e8c165..b067e03c2f 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -24133,24 +24133,30 @@ typval_T eval_call_provider(char *provider, char *method, list_T *arguments)
   return rettv;
 }
 
-/// Checks if a named provider is enabled.
-bool eval_has_provider(const char *name)
-{
-  if (!strequal(name, "clipboard")
-      && !strequal(name, "python")
-      && !strequal(name, "python3")
-      && !strequal(name, "ruby")
-      && !strequal(name, "node")) {
+/// Checks if provider for feature `feat` is enabled.
+bool eval_has_provider(const char *feat)
+{
+  if (!strequal(feat, "clipboard")
+      && !strequal(feat, "python")
+      && !strequal(feat, "python3")
+      && !strequal(feat, "python_compiled")
+      && !strequal(feat, "python_dynamic")
+      && !strequal(feat, "python3_compiled")
+      && !strequal(feat, "python3_dynamic")
+      && !strequal(feat, "ruby")
+      && !strequal(feat, "node")) {
     // Avoid autoload for non-provider has() features.
     return false;
   }
 
+  char name[32];  // Normalized: "python_compiled" => "python".
+  snprintf(name, sizeof(name), "%s", feat);
+  strchrsub(name, '_', '\0');  // Chop any "_xx" suffix.
+
   char buf[256];
-  int len;
   typval_T tv;
-
   // Get the g:loaded_xx_provider variable.
-  len = snprintf(buf, sizeof(buf), "g:loaded_%s_provider", name);
+  int len = snprintf(buf, sizeof(buf), "g:loaded_%s_provider", name);
   if (get_var_tv(buf, len, &tv, NULL, false, true) == FAIL) {
     // Trigger autoload once.
     len = snprintf(buf, sizeof(buf), "provider#%s#bogus", name);