Move html templates to html/ directory

I'm looking into adding some more template samples, such as one that
includes xterm.js.  Keeping all the html in separate directory seems
tidier.

Author: sbc100

docs/emcc.txt

@@ -396,7 +396,7 @@ Options that are modified or new in *emcc* are listed below:
 
    Note:
 
-     * See src/shell.html and src/shell_minimal.html for examples.
+     * See html/shell.html and html/shell_minimal.html for examples.
 
      * This argument is ignored if a target other than HTML is
        specified using the "-o" option.

html/README.md

@@ -0,0 +1,9 @@
+HTML Template Files
+===================
+
+The files in this directory are html templates used by emscripten when
+generating html output.  These are only used when the output of the compiler
+has the `.html` suffix (or when `-oformat=html` is specified).
+
+By default the `shell.html` file in this directory is used but an alternative
+can be specified using the `--shell-file` flag.

src/shell.css html/shell.csssrc/shell.css renamed to html/shell.css

@@ -13,7 +13,7 @@ Emscripten build output consists of two essential parts: 1) the low level compil
 
 Additional build output files can also exist, depending on which features are used. If the Emscripten file packager is used, a binary ``out.data`` package is generated, along with an associated ``out.data.js`` loader file. Also Emscripten pthreads and Fetch APIs have their own associated Web Worker related script ``.js`` output files.
 
-Developers can choose to output either to JavaScript or HTML. If outputting JavaScript (``emcc -o out.js``), the developer is expected to manually create the ``out.html`` main page in which the code is run in browsers. When targeting HTML with ``emcc -o out.html`` (the recommended build mode), Emscripten will generate the HTML shell file automatically. This shell file can be customized by using the ``emcc -o out.html --shell-file path/to/custom_shell.html`` linker directive. Copy the `default minimal HTML shell file <https://github.com/emscripten-core/emscripten/blob/main/src/shell_minimal.html>`_ from Emscripten repository to your project tree to get a good starting template for a customized shell file.
+Developers can choose to output either to JavaScript or HTML. If outputting JavaScript (``emcc -o out.js``), the developer is expected to manually create the ``out.html`` main page in which the code is run in browsers. When targeting HTML with ``emcc -o out.html`` (the recommended build mode), Emscripten will generate the HTML shell file automatically. This shell file can be customized by using the ``emcc -o out.html --shell-file path/to/custom_shell.html`` linker directive. Copy the `default minimal HTML shell file <https://github.com/emscripten-core/emscripten/blob/main/html/shell_minimal.html>`_ from Emscripten repository to your project tree to get a good starting template for a customized shell file.
 
 The following sections offer tips for improving the site experience.
 

src/shell.html html/shell.htmlsrc/shell.html renamed to html/shell.html

@@ -383,7 +383,7 @@ Options that are modified or new in *emcc* are listed below:
 
   .. note::
 
-    - See `src/shell.html <https://github.com/emscripten-core/emscripten/blob/main/src/shell.html>`_ and `src/shell_minimal.html <https://github.com/emscripten-core/emscripten/blob/main/src/shell_minimal.html>`_ for examples.
+    - See `html/shell.html <https://github.com/emscripten-core/emscripten/blob/main/html/shell.html>`_ and `html/shell_minimal.html <https://github.com/emscripten-core/emscripten/blob/main/html/shell_minimal.html>`_ for examples.
     - This argument is ignored if a target other than HTML is specified using the ``-o`` option.
 
 .. _emcc-source-map-base:

src/shell_minimal.html html/shell_minimal.htmlsrc/shell_minimal.html renamed to html/shell_minimal.html

@@ -734,7 +734,7 @@ def test_custom_file_package_url(self):
     # change the file package base dir to look in a "cdn". note that normally
     # you would add this in your own custom html file etc., and not by
     # modifying the existing shell in this manner
-    default_shell = read_file(path_from_root('src/shell.html'))
+    default_shell = read_file(path_from_root('html/shell.html'))
     create_file('shell.html', default_shell.replace('var Module = {', '''
     var Module = {
       locateFile: function(path, prefix) {
@@ -836,7 +836,7 @@ def setup(assetLocalization):
     self.run_browser('test.html', '/report_result?1')
 
     # TODO: CORS, test using a full url for locateFile
-    # create_file('shell.html', read_file(path_from_root('src/shell.html')).replace('var Module = {', 'var Module = { locateFile: function (path) {return "http:/localhost:8888/cdn/" + path;}, '))
+    # create_file('shell.html', read_file(path_from_root('html/shell.html')).replace('var Module = {', 'var Module = { locateFile: function (path) {return "http:/localhost:8888/cdn/" + path;}, '))
     # test()
 
   @also_with_wasmfs
@@ -3643,7 +3643,7 @@ def test_memory_growth_during_startup(self):
   # pthreads tests
 
   def prep_no_SAB(self):
-    create_file('html.html', read_file(path_from_root('src/shell_minimal.html')).replace('''<body>''', '''<body>
+    create_file('html.html', read_file(path_from_root('html/shell_minimal.html')).replace('''<body>''', '''<body>
       <script>
         SharedArrayBuffer = undefined;
         Atomics = undefined;
@@ -4155,7 +4155,7 @@ def test_manual_wasm_instantiate(self):
   def test_wasm_locate_file(self):
     # Test that it is possible to define "Module.locateFile(foo)" function to locate where worker.js will be loaded from.
     ensure_dir('cdn')
-    shell = read_file(path_from_root('src/shell.html'))
+    shell = read_file(path_from_root('html/shell.html'))
     create_file('shell2.html', shell.replace('var Module = {', 'var Module = { locateFile: (filename) => (filename == "test.wasm") ? "cdn/test.wasm" : filename, '))
     self.compile_btest('browser_test_hello_world.c', ['--shell-file', 'shell2.html', '-o', 'test.html'])
     shutil.move('test.wasm', Path('cdn/test.wasm'))
@@ -4804,7 +4804,7 @@ def test_unicode_html_shell(self):
         return 0;
       }
     ''')
-    create_file('shell.html', read_file(path_from_root('src/shell.html')).replace('Emscripten-Generated Code', 'Emscripten-Generated Emoji 😅'))
+    create_file('shell.html', read_file(path_from_root('html/shell.html')).replace('Emscripten-Generated Code', 'Emscripten-Generated Emoji 😅'))
     self.btest_exit('main.c', cflags=['--shell-file', 'shell.html'])
 
   # Tests the functionality of the emscripten_thread_sleep() function.
@@ -4953,7 +4953,7 @@ def test_no_declare_asm_module_exports_wasm2js(self, args):
   def test_no_declare_asm_module_exports(self, args):
     self.btest_exit('declare_asm_module_exports.c', cflags=['-sDECLARE_ASM_MODULE_EXPORTS=0', '-sENVIRONMENT=web', '-O3', '--closure=1'] + args)
 
-  # Tests that the different code paths in src/shell_minimal_runtime.html all work ok.
+  # Tests that the different code paths in html/shell_minimal_runtime.html all work ok.
   @parameterized({
     '': ([],),
     'modularize': (['-sMODULARIZE'],),

src/shell_minimal_runtime.html html/shell_minimal_runtime.htmlsrc/shell_minimal_runtime.html renamed to html/shell_minimal_runtime.html

@@ -58,7 +58,7 @@
 
 logger = logging.getLogger('link')
 
-DEFAULT_SHELL_HTML = utils.path_from_root('src/shell.html')
+DEFAULT_SHELL_HTML = utils.path_from_root('html/shell.html')
 
 DEFAULT_ASYNCIFY_IMPORTS = ['__asyncjs__*']
 
@@ -1139,7 +1139,7 @@ def limit_incoming_module_api():
   if not options.shell_path:
     # Minimal runtime uses a different default shell file
     if settings.MINIMAL_RUNTIME:
-      options.shell_path = options.shell_path = utils.path_from_root('src/shell_minimal_runtime.html')
+      options.shell_path = options.shell_path = utils.path_from_root('html/shell_minimal_runtime.html')
     else:
       options.shell_path = DEFAULT_SHELL_HTML
 
@@ -1627,7 +1627,7 @@ def limit_incoming_module_api():
 
   if settings.MODULARIZE and not (settings.EXPORT_ES6 and not settings.SINGLE_FILE) and \
      settings.EXPORT_NAME == 'Module' and options.oformat == OFormat.HTML and \
-     (options.shell_path == DEFAULT_SHELL_HTML or options.shell_path == utils.path_from_root('src/shell_minimal.html')):
+     (options.shell_path == DEFAULT_SHELL_HTML or options.shell_path == utils.path_from_root('html/shell_minimal.html')):
     exit_with_error(f'Due to collision in variable name "Module", the shell file "{options.shell_path}" is not compatible with build options "-sMODULARIZE -sEXPORT_NAME=Module". Either provide your own shell file, change the name of the export to something else to avoid the name collision. (see https://github.com/emscripten-core/emscripten/issues/7950 for details)')
 
   if settings.WASM_BIGINT:
@@ -2538,7 +2538,7 @@ def generate_traditional_runtime_html(target, options, js_target, wasm_target):
 ''' % (script.inline, get_subresource_location_js(wasm_target + '.js'))
 
   shell = do_replace(shell, '{{{ SCRIPT }}}', script.replacement())
-  shell = shell.replace('{{{ SHELL_CSS }}}', utils.read_file(utils.path_from_root('src/shell.css')))
+  shell = shell.replace('{{{ SHELL_CSS }}}', utils.read_file(utils.path_from_root('html/shell.css')))
   logo_filename = utils.path_from_root('media/powered_by_logo_shell.png')
   logo_b64 = base64_encode(logo_filename)
   shell = shell.replace('{{{ SHELL_LOGO }}}', f'<img id="emscripten_logo" src="data:image/png;base64,{logo_b64}">')