/fiddle: before resetting a db, roll back any transactions (resolves problem reported in [forum:0b41a25d65|forum post 0b41a25d65]) and remove an obsolete/broken reference to a long-gone API which could cause initialization to fail prematurely.

FossilOrigin-Name: ee164ca73cf4151b1a1bf351729afa9b0ec95bd5004a5d5bfce3ed46268bfbf3

ext/wasm/fiddle/fiddle-worker.js

@@ -166,11 +166,10 @@
       stdout("SQLite version", capi.sqlite3_libversion(),
              capi.sqlite3_sourceid().substr(0,19));
       stdout('Welcome to the "fiddle" shell.');
-      if(sqlite3.opfs){
+      if(capi.sqlite3_vfs_find("opfs")){
         stdout("\nOPFS is available. To open a persistent db, use:\n\n",
                "  .open file:name?vfs=opfs\n\nbut note that some",
                "features (e.g. upload) do not yet work with OPFS.");
-        sqlite3.opfs.registerVfs();
       }
       stdout('\nEnter ".help" for usage hints.');
       this.exec([ // initialization commands...
@@ -317,7 +316,7 @@
     };
     console.warn("Unknown fiddle-worker message type:",ev);
   };
-  
+
   /**
      emscripten module for use with build mode -sMODULARIZE.
   */

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\scompiler\swarning\sin\sdate.c.\s\sUpdate\smakefiles\sto\sinclude\sall\snecessary\ndependencies\sfor\sbuilding\sshell.c.
-D 2024-03-04T18:22:18.359
+C /fiddle:\sbefore\sresetting\sa\sdb,\sroll\sback\sany\stransactions\s(resolves\sproblem\sreported\sin\s[forum:0b41a25d65|forum\spost\s0b41a25d65])\sand\sremove\san\sobsolete/broken\sreference\sto\sa\slong-gone\sAPI\swhich\scould\scause\sinitialization\sto\sfail\sprematurely.
+D 2024-03-05T06:31:37.489
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -640,7 +640,7 @@ F ext/wasm/dist.make 3a851858aad72e246a5d9c5aaf6b6a144305f1bf898ac1846760ea7bab9
 F ext/wasm/example_extra_init.c 2347cd69d19d839ef4e5e77b7855103a7fe3ef2af86f2e8c95839afd8b05862f
 F ext/wasm/fiddle.make fa2ba6e90457ba2a71cb745f200d409caf773076df75ae5b177cc225d7627a11
 F ext/wasm/fiddle/emscripten.css 3d253a6fdb8983a2ac983855bfbdd4b6fa1ff267c28d69513dd6ef1f289ada3f
-F ext/wasm/fiddle/fiddle-worker.js 9be57887756c6854dbdcb5e7d8b7a26935d565491333a2f91dc4113598c659b5
+F ext/wasm/fiddle/fiddle-worker.js 850e66fce39b89d59e161d1abac43a181a4caa89ddeea162765d660277cd84ce
 F ext/wasm/fiddle/fiddle.js 974b995119ac443685d7d94d3b3c58c6a36540e9eb3fed7069d5653284071715
 F ext/wasm/fiddle/index.html 5daf54e8f3d7777cbb1ca4f93affe28858dbfff25841cb4ab81d694efed28ec2
 F ext/wasm/index-dist.html e91d76e4581185238fd3d42ed86ec600f7023ed3e3a944c5c356f25304bf1263
@@ -751,7 +751,7 @@ F src/random.c 606b00941a1d7dd09c381d3279a058d771f406c5213c9932bbd93d5587be4b9c
 F src/resolve.c d77c6160bc8f249c2196fdd3e75f66a1dd70e37aa25c39aedc7b1f93c42b7c6d
 F src/rowset.c 8432130e6c344b3401a8874c3cb49fefe6873fec593294de077afea2dce5ec97
 F src/select.c 43fabfc01bf87addd15e39f112f1e2ade15b19594835ab8a9e5bd50839d4e1b1
-F src/shell.c.in 2ec564ed3ff0147036be313efeb47b3dbfb8753d5eb5ea0e90636427c6b3a365
+F src/shell.c.in 6e7cd81874e3cea68b4f2dc72a8731a5f545aca0b3e48f132e3c6ee6862e3c0a
 F src/sqlite.h.in 19a2db3995a699bd7f6dfb423856242bfceb7ec849a93c91d241d19fc28d9f0f
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 3f046c04ea3595d6bfda99b781926b17e672fd6d27da2ba6d8d8fc39981dcb54
@@ -2176,8 +2176,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 0d19eeaafb296aad212ee4f55a0f6df8c7c5185b14d7f7f49c020fe4cbe370c1
-R 191956f8db663f29da20ebca61821faf
-U drh
-Z 23a2cbc5a581c90c55252c83bc05fa14
+P 178b7d46f9c8e1694ed6f506d2785a9f5c49e2b428e04c8096d557cc1b5c9680
+R 64eca58e8ac762a5eb6b341ff69c8405
+U stephan
+Z ff3bca729d13aff9e0b3d1adfb9ed46d
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-178b7d46f9c8e1694ed6f506d2785a9f5c49e2b428e04c8096d557cc1b5c9680
+ee164ca73cf4151b1a1bf351729afa9b0ec95bd5004a5d5bfce3ed46268bfbf3

src/shell.c.in

@@ -12838,7 +12838,7 @@ sqlite3_vfs * fiddle_db_vfs(const char *zDbName){
 
 /* Only for emcc experimentation purposes. */
 sqlite3 * fiddle_db_arg(sqlite3 *arg){
-    printf("fiddle_db_arg(%p)\n", (const void*)arg);
+    oputf("fiddle_db_arg(%p)\n", (const void*)arg);
     return arg;
 }
 
@@ -12864,12 +12864,22 @@ const char * fiddle_db_filename(const char * zDbName){
 
 /*
 ** Completely wipes out the contents of the currently-opened database
-** but leaves its storage intact for reuse.
+** but leaves its storage intact for reuse. If any transactions are
+** active, they are forcibly rolled back.
 */
 void fiddle_reset_db(void){
   if( globalDb ){
-    int rc = sqlite3_db_config(globalDb, SQLITE_DBCONFIG_RESET_DATABASE, 1, 0);
-    if( 0==rc ) rc = sqlite3_exec(globalDb, "VACUUM", 0, 0, 0);
+    int rc;
+    while( sqlite3_txn_state(globalDb,0)>0 ){
+      /*
+      ** Resolve problem reported in
+      ** https://sqlite.org/forum/forumpost/0b41a25d65
+      */
+      oputz("Rolling back in-progress transaction.\n");
+      sqlite3_exec(globalDb,"ROLLBACK", 0, 0, 0);
+    }
+    rc = sqlite3_db_config(globalDb, SQLITE_DBCONFIG_RESET_DATABASE, 1, 0);
+    if( 0==rc ) sqlite3_exec(globalDb, "VACUUM", 0, 0, 0);
     sqlite3_db_config(globalDb, SQLITE_DBCONFIG_RESET_DATABASE, 0, 0);
   }
 }