Add surgery clear-elements command

[ahrtr]

This PR is on top of #407. It can be used to fix the corrupted db file in #402.

Steps to fix the db file are as below.

$ ./bbolt surgery clear-elements ./local-kv.db  new1.db 29 5 6

$ ./bbolt surgery clear-elements  ./new1.db ./new2.db 29 7 8

$ ./bbolt surgery clear-elements  ./new2.db ./new3.db 29 9 10

new3.db is the final db file,

$ ./bbolt check ./new3.db 
OK

Note we still need to investigate the root cause of the corruption.

[ahrtr]

Still need to add a couple of unit test cases

[shippomx]

Still need to add a couple of unit test cases

This PR is on top of #407. It can be used to fix the corrupted db file in #402.

Steps to fix the db file are as below.

$ ./bbolt surgery clear-elements ./local-kv.db  new1.db 29 5 6

$ ./bbolt surgery clear-elements  ./new1.db ./new2.db 29 7 8

$ ./bbolt surgery clear-elements  ./new2.db ./new3.db 29 9 10

new3.db is the final db file,

$ ./bbolt check ./new3.db 
OK

Note we still need to investigate the root cause of the corruption.

This PR is on top of #407. It can be used to fix the corrupted db file in #402.

Steps to fix the db file are as below.

$ ./bbolt surgery clear-elements ./local-kv.db  new1.db 29 5 6

$ ./bbolt surgery clear-elements  ./new1.db ./new2.db 29 7 8

$ ./bbolt surgery clear-elements  ./new2.db ./new3.db 29 9 10

new3.db is the final db file,

$ ./bbolt check ./new3.db 
OK

Note we still need to investigate the root cause of the corruption.

Thanks, It works for me.

[ptabor]

I know it's not how bbolt used to be doing the syntax, but maybe starting with new commands and bbolt 1.4,
we should be using more readable (cobra style) syntax, like:

./bbolt surgery clear-page-elements ./local-kv.db --output ./local-kv.db.new --pageId 57 --from-key=5 --to-key=6

WDYT ?

[ahrtr]

Makes sense to me. I have been thinking to refactor the CMD using cobra. I am thinking to finish the refactoring firstly. WDYT? @ptabor @tjungblu

[ptabor]

Makes sense to me. I have been thinking to refactor the CMD using cobra. I am thinking to finish the refactoring firstly. WDYT? @ptabor @tjungblu

Seems good to me. I don't think we need an upfront refactoring... we can start from introducing the cobra to the new commands.

[ahrtr]

I don't think we need an upfront refactoring

Sounds good to me. I will try to add the new command using cobra. And refactoring other commands in separate PRs later.

[ahrtr]

This PR will be superseded by #417