command: add load-config-file

Unlike set include mpv.conf, this works after playback has started. It
can be used to auto reload the configuration, e.g. in vim:
autocmd BufWritePost ~/.config/mpv/mpv.conf silent !echo load-config-file %:p | socat - /tmp/mpvsocket

Partially fixes #6362.

DOCS/interface-changes.rst

@@ -42,6 +42,7 @@ Interface changes
     - add `forced` choice to `subs-with-matching-audio`
     - remove `--term-remaining-playtime` option
     - change fallback deinterlace to bwdif
+    - add the command `load-config-file`
  --- mpv 0.37.0 ---
     - `--save-position-on-quit` and its associated commands now store state files
       in %LOCALAPPDATA% instead of %APPDATA% directory by default on Windows.

DOCS/man/input.rst

@@ -1336,6 +1336,11 @@ Input Commands that are Possibly Subject to Change
         relevant mode. Prints a warning if nothing could be done. See
         `Runtime profiles`_ for details.
 
+``load-config-file <filename>``
+    Load a configuration file, similar to the ``--include`` option. If the file
+    was already included, its previous options are not reset before it is
+    reparsed.
+
 ``load-script <filename>``
     Load a script, similar to the ``--script`` option. Whether this waits for
     the script to finish initialization or not changed multiple times, and the

player/command.c

@@ -55,6 +55,7 @@
 #include "options/m_option.h"
 #include "options/m_property.h"
 #include "options/m_config_frontend.h"
+#include "options/parse_configfile.h"
 #include "osdep/getpid.h"
 #include "video/out/gpu/context.h"
 #include "video/out/vo.h"
@@ -6270,6 +6271,23 @@ static void cmd_apply_profile(void *p)
     }
 }
 
+static void cmd_load_config_file(void *p)
+{
+    struct mp_cmd_ctx *cmd = p;
+    struct MPContext *mpctx = cmd->mpctx;
+
+    char *config_file = cmd->args[0].v.s;
+    int r = m_config_parse_config_file(mpctx->mconfig, mpctx->global,
+                                       config_file, NULL, 0);
+
+    if (r < 1) {
+        cmd->success = false;
+        return;
+    }
+
+    mp_notify_property(mpctx, "profile-list");
+}
+
 static void cmd_load_script(void *p)
 {
     struct mp_cmd_ctx *cmd = p;
@@ -6807,6 +6825,8 @@ const struct mp_cmd_def mp_cmds[] = {
             .flags = MP_CMD_OPT_ARG}, }
     },
 
+    { "load-config-file", cmd_load_config_file, {{"filename", OPT_STRING(v.s)}} },
+
     { "load-script", cmd_load_script, {{"filename", OPT_STRING(v.s)}} },
 
     { "dump-cache", cmd_dump_cache, { {"start", OPT_TIME(v.d),

player/lua/auto_profiles.lua

@@ -164,8 +164,8 @@ local function compile_cond(name, s)
     return chunk
 end
 
-local function load_profiles()
-    for i, v in ipairs(mp.get_property_native("profile-list")) do
+local function load_profiles(profiles_property)
+    for _, v in ipairs(profiles_property) do
         local cond = v["profile-cond"]
         if cond and #cond > 0 then
             local profile = {
@@ -182,17 +182,25 @@ local function load_profiles()
     end
 end
 
-load_profiles()
+mp.observe_property("profile-list", "native", function (_, profiles_property)
+    profiles = {}
+    watched_properties = {}
+    cached_properties = {}
+    properties_to_profiles = {}
+    mp.unobserve_property(on_property_change)
 
-if #profiles < 1 and mp.get_property("load-auto-profiles") == "auto" then
-    -- make it exit immediately
-    _G.mp_event_loop = function() end
-    return
-end
+    load_profiles(profiles_property)
+
+    if #profiles < 1 and mp.get_property("load-auto-profiles") == "auto" then
+        -- make it exit immediately
+        _G.mp_event_loop = function() end
+        return
+    end
+
+    on_idle() -- re-evaluate all profiles immediately
+end)
 
 mp.register_idle(on_idle)
 for _, name in ipairs({"on_load", "on_preloaded", "on_before_start_file"}) do
     mp.add_hook(name, 50, on_hook)
 end
-
-on_idle() -- re-evaluate all profiles immediately