Bug #32296 mysqltest fails to parse "append_file" inside a "while", it works inside

a "if"
Bug #41913 mysqltest cannot source files from if inside while
Some commands require additional processing which only works first time
Keep content for write_file or append_file with the st_command struct
Add tests for those cases to mysqltest.test

client/mysqltest.cc

@@ -417,6 +417,7 @@ static struct st_expected_errors saved_expected_errors;
 struct st_command
 {
   char *query, *query_buf,*first_argument,*last_argument,*end;
+  DYNAMIC_STRING content;
   int first_word_len, query_len;
   my_bool abort_on_error;
   struct st_expected_errors expected_errors;
@@ -1138,6 +1139,8 @@ void free_used_memory()
   {
     struct st_command **q= dynamic_element(&q_lines, i, struct st_command**);
     my_free((*q)->query_buf,MYF(MY_ALLOW_ZERO_PTR));
+    if ((*q)->content.str)
+      dynstr_free(&(*q)->content);
     my_free((*q),MYF(0));
   }
   for (i= 0; i < 10; i++)
@@ -3283,21 +3286,30 @@ void do_write_file_command(struct st_command *command, my_bool append)
                      sizeof(write_file_args)/sizeof(struct command_arg),
                      ' ');
 
-  /* If no delimiter was provided, use EOF */
-  if (ds_delimiter.length == 0)
-    dynstr_set(&ds_delimiter, "EOF");
-
   if (!append && access(ds_filename.str, F_OK) == 0)
   {
     /* The file should not be overwritten */
     die("File already exist: '%s'", ds_filename.str);
   }
 
+  ds_content= command->content;
+  /* If it hasn't been done already by a loop iteration, fill it in */
+  if (! ds_content.str)
+  {
+    /* If no delimiter was provided, use EOF */
+    if (ds_delimiter.length == 0)
+      dynstr_set(&ds_delimiter, "EOF");
+
     init_dynamic_string(&ds_content, "", 1024, 1024);
     read_until_delimiter(&ds_content, &ds_delimiter);
+    command->content= ds_content;
+  }
+  /* This function could be called even if "false", so check before printing */
+  if (cur_block->ok)
+  {
     DBUG_PRINT("info", ("Writing to file: %s", ds_filename.str));
     str_to_file2(ds_filename.str, ds_content.str, ds_content.length, append);
-  dynstr_free(&ds_content);
+  }
   dynstr_free(&ds_filename);
   dynstr_free(&ds_delimiter);
   DBUG_VOID_RETURN;
@@ -7684,7 +7696,31 @@ int main(int argc, char **argv)
       command->type= Q_COMMENT;
     }
 
-    if (cur_block->ok)
+    my_bool ok_to_do= cur_block->ok;
+    /*
+      Some commands need to be "done" the first time if they may get
+      re-iterated over in a true context. This can only happen if there's 
+      a while loop at some level above the current block.
+    */
+    if (!ok_to_do)
+    {
+      if (command->type == Q_SOURCE ||
+          command->type == Q_WRITE_FILE ||
+          command->type == Q_APPEND_FILE ||
+	  command->type == Q_PERL)
+      {
+	for (struct st_block *stb= cur_block-1; stb >= block_stack; stb--)
+	{
+	  if (stb->cmd == cmd_while)
+	  {
+	    ok_to_do= 1;
+	    break;
+	  }
+	}
+      }
+    }
+
+    if (ok_to_do)
     {
       command->last_argument= command->first_argument;
       processed = 1;

mysql-test/r/mysqltest.result

@@ -314,21 +314,10 @@ here is the sourced script
 1 = outer loop variable before dec
 
 0 = outer loop variable after dec
-
-2 = outer loop variable after while
+outer=2 ifval=0
+outer=1 ifval=1
 here is the sourced script
 
-2 = outer loop variable before dec
-
-1 = outer loop variable after dec
-
-1 = outer loop variable after while
-here is the sourced script
-
-1 = outer loop variable before dec
-
-0 = outer loop variable after dec
-
 In loop
 here is the sourced script
 
@@ -538,6 +527,10 @@ mysqltest: At line 1: Missing required argument 'filename' to command 'write_fil
 mysqltest: At line 1: End of file encountered before 'EOF' delimiter was found
 Content for test_file1
 mysqltest: At line 1: File already exist: 'MYSQLTEST_VARDIR/tmp/test_file1.tmp'
+These lines should be repeated,
+if things work as expected
+These lines should be repeated,
+if things work as expected
 Some data
 for cat_file command
 of mysqltest

mysql-test/t/mysqltest.test

@@ -853,16 +853,18 @@ while ($outer)
   eval SELECT '$outer = outer loop variable after dec' AS "";
 }
 
+# Test source in an if in a while which is false on 1st iteration
 let $outer= 2; # Number of outer loops
+let $ifval= 0; # false 1st time
 while ($outer)
 {
-  eval SELECT '$outer = outer loop variable after while' AS "";
-
-  echo here is the sourced script;
+  echo outer=$outer ifval=$ifval;
 
-  eval SELECT '$outer = outer loop variable before dec' AS "";
+  if ($ifval) {
+    --source $MYSQLTEST_VARDIR/tmp/sourced.inc
+  }
   dec $outer;
-  eval SELECT '$outer = outer loop variable after dec' AS "";
+  inc $ifval;
 }
 
 
@@ -1663,6 +1665,20 @@ EOF
 
 remove_file $MYSQLTEST_VARDIR/tmp/test_file1.tmp;
 
+# Test append_file within while
+let $outer= 2; # Number of outer loops
+while ($outer)
+{
+  append_file $MYSQLTEST_VARDIR/tmp/app_while.tmp;
+These lines should be repeated,
+if things work as expected
+EOF
+  dec $outer;
+}
+
+cat_file $MYSQLTEST_VARDIR/tmp/app_while.tmp;
+remove_file $MYSQLTEST_VARDIR/tmp/app_while.tmp;
+
 # ----------------------------------------------------------------------------
 # test for cat_file
 # ----------------------------------------------------------------------------