sqldiff: if the first db argument does not exist, fail instead of creating an empty db. Resolving that for the second argument is trickier, as discussed in [forum:ec2d429e32 | forum post ec2d429e32].

FossilOrigin-Name: 0547ccf776c6054732437bffb8b2fe2ed5194ef817c2593f8cec4a3e2b749720

manifest

@@ -1,5 +1,5 @@
-C Rename\ssome\sJS\sfiles\sfor\sconsistency.\sThis\saffects\sonly\sthe\sbuild\sprocess,\snot\sthe\sdeliverables.
-D 2024-07-10T08:33:52.381
+C sqldiff:\sif\sthe\sfirst\sdb\sargument\sdoes\snot\sexist,\sfail\sinstead\sof\screating\san\sempty\sdb.\sResolving\sthat\sfor\sthe\ssecond\sargument\sis\strickier,\sas\sdiscussed\sin\s[forum:ec2d429e32\s|\sforum\spost\sec2d429e32].
+D 2024-07-12T13:45:15.768
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 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -611,10 +611,10 @@ F ext/wasm/api/post-js-footer.js cd0a8ec768501d9bd45d325ab0442037fb0e33d1f3b4f08
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+F ext/wasm/api/sqlite3-api-glue.c-pp.js 114085f4dceb28e06d20d3fb597b2501a4aa69f4b6cd29234f7cc1cf81d5b92d
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+F ext/wasm/api/sqlite3-api-worker1.c-pp.js 5cc22a3c0d52828cb32aad8691488719f47d27567e63e8bc8b832d74371c352d
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@@ -2156,7 +2156,7 @@ F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 7ce07da76b5e745783e703a834417d725b7d45fd
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 F tool/split-sqlite3c.tcl 5aa60643afca558bc732b1444ae81a522326f91e1dc5665b369c54f09e20de60
-F tool/sqldiff.c 1e0a2c264c2ad5aca745d35deee3c7715cb00c703839cfb0b85be079db55194c
+F tool/sqldiff.c 7cba849010303618a37c62ec918ff34bd033a4e921eedf60b9f6a0fcd0f95441
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@@ -2195,8 +2195,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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+Z 4529059c7c801563043334f808abcdd3
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-bcef3f71a2f68768819d9f716f2c29e752fb173df1506469c8669d95ecc2ff50
+0547ccf776c6054732437bffb8b2fe2ed5194ef817c2593f8cec4a3e2b749720

tool/sqldiff.c

@@ -1998,7 +1998,7 @@ int main(int argc, char **argv){
   if( g.bSchemaOnly && g.bSchemaCompare ){
     cmdlineError("The --schema option is useless with --table %s .", zTab);
   }
-  rc = sqlite3_open(zDb1, &g.db);
+  rc = sqlite3_open_v2(zDb1, &g.db, SQLITE_OPEN_READONLY, 0);
   if( rc ){
     cmdlineError("cannot open database file \"%s\"", zDb1);
   }