Rename system library files from library_foo.js to libfoo.js

At the same time, move all the library file into a separate `src/lib`
directory.  This helps distinguish library files from other files
in the `lib` directory, which is currently very overcrowded/overloaded.

These files were also includ-able via `-lfoo` and we previously had to
use a special case for system libraries where `library_foo.js` could be
used in addition to more standed `libfoo.js`.  This change removes to
special case.

This only file that was not renamed using the simple pattern was
`library.py` itself which becomes `libcore.py`.  I also considered
`libemscripten.js`.

To some this may seem like needless churn, but for years now the `src`
directory (IMHO) has been asking for cleanup.  I think having files
logically separated into directories helps a lot with understanding the
project structure for both newcomers and old timers alike.

As a followup, I am also considering moving all the runtime files into
`src/include` (since these are all files that get `#included` into the
generated code directly.  That would leave the `src` directory
containing only the JS compiler code itself which I think is another
important distinction.

Author: sbc100

emcc.py

@@ -1310,7 +1310,7 @@ def consume_arg_file():
         options.memory_profiler = True
       newargs[i] = ''
       settings_changes.append('EMSCRIPTEN_TRACING=1')
-      settings.JS_LIBRARIES.append('library_trace.js')
+      settings.JS_LIBRARIES.append('libtrace.js')
     elif check_flag('--emit-symbol-map'):
       options.emit_symbol_map = True
       settings.EMIT_SYMBOL_MAP = 1

eslint.config.mjs

@@ -26,7 +26,7 @@ export default [{
     '**/third_party/',
     '**/test/',
     'src/polyfill/',
-    'src/library*.js',
+    'src/lib/',
     'src/runtime_*.js',
     'src/shell*.js',
     'src/preamble*.js',

src/jsifier.mjs

@@ -585,7 +585,7 @@ function(${args}) {
           return dep();
         }
         // $noExitRuntime is special since there are conditional usages of it
-        // in library.js and library_pthread.js.  These happen before deps are
+        // in libcore.js and libpthread.js.  These happen before deps are
         // processed so depending on it via `__deps` doesn't work.
         if (dep === '$noExitRuntime') {
           error(

src/library_addfunction.js renamed to src/lib/libaddfunction.js

@@ -8,7 +8,7 @@
 // it itself depends on the struct info information.
 
 #if !BOOTSTRAPPING_STRUCT_INFO
-assert(false, "library_bootstrap.js only designed for use with BOOTSTRAPPING_STRUCT_INFO")
+assert(false, "libbootstrap.js only designed for use with BOOTSTRAPPING_STRUCT_INFO")
 #endif
 
 assert(Object.keys(LibraryManager.library).length === 0);

src/library_async.js renamed to src/lib/libasync.js

@@ -203,7 +203,7 @@ var LibraryBrowser = {
           alpha: false,
 #if MIN_WEBGL_VERSION >= 2
           majorVersion: 2,
-#elif MAX_WEBGL_VERSION >= 2 // library_browser.js defaults: use the WebGL version chosen at compile time (unless overridden below)
+#elif MAX_WEBGL_VERSION >= 2 // libbrowser.js defaults: use the WebGL version chosen at compile time (unless overridden below)
           majorVersion: (typeof WebGL2RenderingContext != 'undefined') ? 2 : 1,
 #else
           majorVersion: 1,

src/library_atomic.js renamed to src/lib/libatomic.js

@@ -25,7 +25,7 @@
 /*global throwInstanceAlreadyDeleted, shallowCopyInternalPointer*/
 /*global RegisteredPointer_fromWireType, constNoSmartPtrRawPointerToWireType, nonConstNoSmartPtrRawPointerToWireType, genericPointerToWireType*/
 
-#include "embind_shared.js"
+#include "libembind_shared.js"
 
 var LibraryEmbind = {
   $UnboundTypeError__postset: "UnboundTypeError = Module['UnboundTypeError'] = extendError(Error, 'UnboundTypeError');",

src/library_autodebug.js renamed to src/lib/libautodebug.js

@@ -2,7 +2,7 @@
 // Emscripten is available under two separate licenses, the MIT license and the
 // University of Illinois/NCSA Open Source License.  Both these licenses can be
 // found in the LICENSE file.
-#include "embind_shared.js"
+#include "libembind_shared.js"
 
 var LibraryEmbind = {
 

src/library_bootstrap.js renamed to src/lib/libbootstrap.js

@@ -12,19 +12,19 @@ addToLibrary({
     '$intArrayFromString',
     '$stringToUTF8Array',
     '$lengthBytesUTF8',
-#if LibraryManager.has('library_idbfs.js')
+#if LibraryManager.has('libidbfs.js')
     '$IDBFS',
 #endif
-#if LibraryManager.has('library_nodefs.js')
+#if LibraryManager.has('libnodefs.js')
     '$NODEFS',
 #endif
-#if LibraryManager.has('library_workerfs.js')
+#if LibraryManager.has('libworkerfs.js')
     '$WORKERFS',
 #endif
-#if LibraryManager.has('library_noderawfs.js')
+#if LibraryManager.has('libnoderawfs.js')
     '$NODERAWFS',
 #endif
-#if LibraryManager.has('library_proxyfs.js')
+#if LibraryManager.has('libproxyfs.js')
     '$PROXYFS',
 #endif
 #if ASSERTIONS
@@ -1510,16 +1510,16 @@ FS.staticInit();
 
       FS.filesystems = {
         'MEMFS': MEMFS,
-#if LibraryManager.has('library_idbfs.js')
+#if LibraryManager.has('libidbfs.js')
         'IDBFS': IDBFS,
 #endif
-#if LibraryManager.has('library_nodefs.js')
+#if LibraryManager.has('libnodefs.js')
         'NODEFS': NODEFS,
 #endif
-#if LibraryManager.has('library_workerfs.js')
+#if LibraryManager.has('libworkerfs.js')
         'WORKERFS': WORKERFS,
 #endif
-#if LibraryManager.has('library_proxyfs.js')
+#if LibraryManager.has('libproxyfs.js')
         'PROXYFS': PROXYFS,
 #endif
       };

src/library_browser.js renamed to src/lib/libbrowser.js

@@ -13,7 +13,7 @@ addToLibrary({
   $FS_handledByPreloadPlugin__internal: true,
   $FS_handledByPreloadPlugin__deps: ['$preloadPlugins'],
   $FS_handledByPreloadPlugin: (byteArray, fullname, finish, onerror) => {
-#if LibraryManager.has('library_browser.js')
+#if LibraryManager.has('libbrowser.js')
     // Ensure plugins are ready.
     if (typeof Browser != 'undefined') Browser.init();
 #endif

src/library_c_preprocessor.js renamed to src/lib/libc_preprocessor.js

@@ -626,7 +626,7 @@ function handleWebGLProxying(funcs) {
 
 handleWebGLProxying(LibraryHtml5WebGL);
 
-#if LibraryManager.has('library_webgl.js')
+#if LibraryManager.has('libwebgl.js')
 autoAddDeps(LibraryHtml5WebGL, '$GL');
 #endif
 

src/library_ccall.js renamed to src/lib/libccall.js

@@ -50,19 +50,19 @@ FS.init();
     '$FS_mkdirTree',
     '$FS_writeFile',
     '$FS_unlink',
-#if LibraryManager.has('library_icasefs.js')
+#if LibraryManager.has('libicasefs.js')
     '$ICASEFS',
 #endif
-#if LibraryManager.has('library_nodefs.js')
+#if LibraryManager.has('libnodefs.js')
     '$NODEFS',
 #endif
-#if LibraryManager.has('library_opfs.js')
+#if LibraryManager.has('libopfs.js')
     '$OPFS',
 #endif
-#if LibraryManager.has('library_jsfilefs.js')
+#if LibraryManager.has('libjsfilefs.js')
     '$JSFILEFS',
 #endif
-#if LibraryManager.has('library_fetchfs.js')
+#if LibraryManager.has('libfetchfs.js')
     '$FETCHFS',
 #endif
     'malloc',
@@ -482,7 +482,7 @@ FS.init();
   // need some specific FS_* operations. When the FS object is present, it calls
   // into those FS_* methods as needed.
   //
-  // In contrast, the old JS FS (library_fs.js) does the opposite: it puts all
+  // In contrast, the old JS FS (libfs.js) does the opposite: it puts all
   // things on the FS object, and copies them to FS_* methods for use from JS
   // library code. Given that the JS FS is implemented entirely in JS, that
   // makes sense there (as almost all that FS object ends up needed anyhow all