Print FTL version when calling the built in sqlite function only in interactive mode

[yubiuser]

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5

So far Pi-hole printed it's version string when calling the built-in SQLite engine also when not in interactive mode. This PR moves the printing function into sqlite's shell.c and prints right befor SQLite prints it's own version string.

Before:

rockpi@rockpi-4b:~$ pihole-FTL sqlite3 < test.sql 
Pi-hole FTL vDev-6f2fa93 2021-10-19 13:52:55 +0200
6|0|tom.vgwort.de|1|1579547648|1634041069|

After:

rockpi@rockpi-4b:~$ pihole-FTL sqlite3 < test.sql 
6|0|tom.vgwort.de|1|1579547648|1634041069|

rockpi@rockpi-4b:~$ pihole-FTL sqlite3
Pi-hole FTL vDev-4886d8e 2021-10-21 11:15:20 +0200
SQLite version 3.36.0 2021-06-18 18:36:39
Enter ".help" for usage hints.
Connected to a transient in-memory database.
Use ".open FILENAME" to reopen on a persistent database.
sqlite> 

[yubiuser]

The only thing I'm not sure of is the big header in /scr/database/CMakeList.txt

This file has no dependencies on other code in the repo and takes a long time to build.

Because this is not true anymore, I added a dependency.

[DL6ER]

Yes, this is a bad thing. It basically means the entire SQLite3 library needs to be recompiled entry time. This pushes incremental builds from seconds to minutes. Since we have a lot of those during regular development, this is definitely a no-go. Furthermore, editing shell.c is another issue as the file will be overwritten with future updates of the embedded SQLite3 library. It is just very likely that we'll forget to re-add your changes.

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/pi-hole-ftl-v5-12-web-v5-9-and-core-v5-7-released/51795/1