feat(lua): show proper verbose output for lua configuration

`:verbose` didn't work properly with lua configs (For example:
    options or keymaps are set from lua, just say that they were set
    from lua, doesn't say where they were set at.

This fixes that issue. Now `:verbose` will provide filename and line no
when option/keymap is set from lua.

Changes:
  - compiles lua/vim/keymap.lua as vim/keymap.lua
 - When souring a lua file current_sctx.sc_sid is set to SID_LUA
 - Moved finding scripts SID out of `do_source()` to `get_current_script_id()`.
   So it can be reused for lua files.
 - Added new function `nlua_get_sctx` that extracts current lua scripts
   name and line no with debug library. And creates a sctx for it.
     NOTE: This function ignores C functions and blacklist which
     currently contains only vim/_meta.lua so vim.o/opt wrappers aren't
     targeted.
 - Added function `nlua_set_sctx` that changes provided sctx to current
   lua scripts sctx if a lua file is being executed.
 - Added tests in tests/functional/lua/verbose_spec.lua
 - add primary support for additional types (:autocmd, :function, :syntax) to lua verbose
    Note: These can't yet be directly set from lua but once that's possible
    :verbose should work for them hopefully :D
 - add :verbose support for nvim_exec & nvim_command within lua
    Currently auto commands/commands/functions ... can only be defined
    by nvim_exec/nvim_command this adds support for them. Means if those
    Are defined within lua with vim.cmd/nvim_exec :verbose will show their
    location . Though note it'll show the line no on which nvim_exec call was made.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/nvim/syntax.c b/src/nvim/syntax.c
index 2b74c45478..db10b71d38 100644
--- a/src/nvim/syntax.c
+++ b/src/nvim/syntax.c
@@ -27,6 +27,7 @@
 #include "nvim/highlight.h"
 #include "nvim/indent_c.h"
 #include "nvim/keymap.h"
+#include "nvim/lua/executor.h"
 #include "nvim/macros.h"
 #include "nvim/mbyte.h"
 #include "nvim/memline.h"
@@ -6919,6 +6920,7 @@ void do_highlight(const char *line, const bool forceit, const bool init)
         hlgroup->sg_deflink = to_id;
         hlgroup->sg_deflink_sctx = current_sctx;
         hlgroup->sg_deflink_sctx.sc_lnum += sourcing_lnum;
+        nlua_set_sctx(&hlgroup->sg_deflink_sctx);
       }
     }
 
@@ -6939,6 +6941,7 @@ void do_highlight(const char *line, const bool forceit, const bool init)
         hlgroup->sg_link = to_id;
         hlgroup->sg_script_ctx = current_sctx;
         hlgroup->sg_script_ctx.sc_lnum += sourcing_lnum;
+        nlua_set_sctx(&hlgroup->sg_script_ctx);
         hlgroup->sg_cleared = false;
         redraw_all_later(SOME_VALID);
 
@@ -7319,6 +7322,7 @@ void do_highlight(const char *line, const bool forceit, const bool init)
     }
     HL_TABLE()[idx].sg_script_ctx = current_sctx;
     HL_TABLE()[idx].sg_script_ctx.sc_lnum += sourcing_lnum;
+    nlua_set_sctx(&HL_TABLE()[idx].sg_script_ctx);
   }
   xfree(key);
   xfree(arg);