meson: add mpv-install and mpv-uninstall helpers on Windows

They call `--install` / ``--uninstall` for users who don't want to open
console and do it manually, this is one-click solution.

.github/workflows/build.yml

@@ -195,9 +195,10 @@ jobs:
         with:
           name: mpv-x86_64-windows-msvc
           path: |
-            build/mpv.???
+            build/mpv.exe
+            build/mpv*.com
+            build/mpv.pdb
             build/vulkan-*.dll
-            !build/mpv.lib
 
       - name: Save Cache
         uses: actions/cache/save@v4

DOCS/man/options.rst

@@ -7952,7 +7952,7 @@ Miscellaneous
     more details.
 
 ``--install``
-    (Windows only)
+    (Windows only) (available also as mpv-install helper)
 
     Registers mpv as a media player on Windows. This includes adding registry
     entries to associate mpv with media files and protocols, as well as enabling
@@ -7991,7 +7991,7 @@ Miscellaneous
     variable, a semicolon-separated list of paths.
 
 ``--uninstall``
-    (Windows only)
+    (Windows only) (available also as mpv-uninstall helper)
 
     Unregisters mpv as a media player on Windows, undoing all changes made by
     the ``--install`` option. This will not remove mpv binary itself.

ci/build-mingw64.sh

@@ -308,7 +308,7 @@ meson compile -C $build
 if [ "$2" = pack ]; then
     mkdir -p artifact/tmp
     echo "Copying:"
-    cp -pv $build/mpv.com $build/mpv.exe artifact/
+    cp -pv $build/mpv*.com $build/mpv.exe artifact/
     # copy everything we can get our hands on
     cp -p "$prefix_dir/bin/"*.dll artifact/tmp/
     shopt -s nullglob

ci/build-win32.ps1

@@ -236,6 +236,6 @@ meson setup build `
     -Drubberband=disabled `
     -Dwayland=disabled `
     -Dx11=disabled
-ninja -C build mpv.exe mpv.com libmpv.a
+ninja -C build mpv.exe mpv.com mpv-install.com mpv-uninstall.com libmpv.a
 cp ./build/subprojects/vulkan-loader/vulkan.dll ./build/vulkan-1.dll
 ./build/mpv.com -v --no-config

meson.build

@@ -1813,13 +1813,23 @@ if get_option('cplayer')
     mpv = executable('mpv', main_fn_source, objects: libmpv.extract_all_objects(recursive: true), dependencies: dependencies,
                      win_subsystem: get_option('win32-subsystem'), install: true)
 
-    if win32 and get_option('win32-subsystem') != 'console'
-        wrapper_sources= 'osdep/win32-console-wrapper.c'
-        executable('mpv', wrapper_sources, c_args: ['-municode', '-fno-asynchronous-unwind-tables'],
-                   link_args: ['-municode', '-nostartfiles', '-nodefaultlibs'],
-                   override_options: ['b_sanitize=none'],
-                   dependencies: cc.find_library('pathcch'),
-                   name_suffix: 'com', install: true)
+    if win32
+        wrapper_sources = 'osdep/win32-console-wrapper.c'
+        wrapper_c_args = ['-municode', '-fno-asynchronous-unwind-tables']
+        wrapper_kwargs = {
+            'dependencies': cc.find_library('pathcch'),
+            'link_args': ['-municode', '-nostartfiles', '-nodefaultlibs'],
+            'override_options': 'b_sanitize=none',
+            'name_suffix': 'com',
+            'install': true,
+        }
+        if get_option('win32-subsystem') != 'console'
+            executable('mpv', wrapper_sources, c_args: wrapper_c_args, kwargs: wrapper_kwargs)
+        endif
+        executable('mpv-install', wrapper_sources, c_args: wrapper_c_args + '-DMPV_INSTALL',
+                   kwargs: wrapper_kwargs)
+        executable('mpv-uninstall', wrapper_sources, c_args: wrapper_c_args + '-DMPV_UNINSTALL',
+                   kwargs: wrapper_kwargs)
     endif
 
     if darwin

osdep/w32_install.c

@@ -268,6 +268,8 @@ static void w32_install(struct MPContext *mpctx)
         wchar_t *rpath_w = mp_from_utf8(tmp, rpath);
         reg_add_str(log, root, KEY_MPV_APP_PATH(".exe"), L"Path", rpath_w);
         reg_add_str(log, root, KEY_MPV_APP_PATH(".com"), L"Path", rpath_w);
+        reg_add_str(log, root, KEY_MPV_APP_PATH("-install.com"), L"Path", rpath_w);
+        reg_add_str(log, root, KEY_MPV_APP_PATH("-uninstall.com"), L"Path", rpath_w);
     }
 
     // Name of the "Open With" entry in the context menu
@@ -427,6 +429,8 @@ static void w32_uninstall(struct MPContext *mpctx)
 
     reg_del(log, root, KEY_MPV_APP_PATH(".exe"), NULL);
     reg_del(log, root, KEY_MPV_APP_PATH(".com"), NULL);
+    reg_del(log, root, KEY_MPV_APP_PATH("-install.com"), NULL);
+    reg_del(log, root, KEY_MPV_APP_PATH("-uninstall.com"), NULL);
     reg_del(log, root, KEY_MPV_APP, NULL);
     reg_del(log, root, KEY_MPV_CAPABILITIES_APP, NULL);
     reg_del(log, root, L"Software\\RegisteredApplications", MPV_NAME);

osdep/win32-console-wrapper.c

@@ -82,7 +82,6 @@ static DWORD cr_runproc(wchar_t *name, wchar_t *cmdline)
 int mainCRTStartup(void);
 int mainCRTStartup(void)
 {
-    wchar_t *cmd = GetCommandLineW();
     wchar_t *exe = LocalAlloc(LMEM_FIXED, MP_PATH_MAX * sizeof(wchar_t));
     DWORD len = GetModuleFileNameW(NULL, exe, MP_PATH_MAX);
     if (len < 4 || len == MP_PATH_MAX)
@@ -94,9 +93,26 @@ int mainCRTStartup(void)
         ExitProcess(1);
     }
 
+    // cmd has to be modifiable, as the documentation states:
+    // The Unicode version of this function, CreateProcessW, can modify the
+    // contents of this string.
+#if defined(MPV_INSTALL)
+    wchar_t cmd[] = L"mpv.exe --install";
+#elif defined(MPV_UNINSTALL)
+    wchar_t cmd[] = L"mpv.exe --no-config --uninstall";
+#else
+    wchar_t *cmd = GetCommandLineW();
+#endif
+
     // Set an environment variable so the child process can tell whether it
     // was started from this wrapper and attach to the console accordingly
     SetEnvironmentVariableW(L"_started_from_console", L"yes");
 
     ExitProcess(cr_runproc(exe, cmd));
 }
+
+int WinMainCRTStartup(void);
+int WinMainCRTStartup(void)
+{
+    return mainCRTStartup();
+}