[backport#17696] qt: Force set nPruneSize in QSettings after the intro dialog
Summary:
af112ab62895b145660f4cd7ff842e9cfea2a530 qt: Rename SetPrune() to InitializePruneSetting() (Hennadii Stepanov)
b0bfbe50282877a1eee87118902901a280d6656d refactor: Drop `bool force' parameter (Hennadii Stepanov)
68c9bbe9bc91f882404556998666b1b5acea60e4 qt: Force set nPruneSize in QSettings after intro (Hennadii Stepanov)
a82bd8fa5708c16d1db3edc4e82d70788eb5af19 util: Replace magics with DEFAULT_PRUNE_TARGET_GB (Hennadii Stepanov)
Pull request description:
On master (5622d8f3156a293e61d0964c33d4b21d8c9fd5e0), having `QSettings` set already ``` $ grep nPruneSize ~/.config/Bitcoin/Bitcoin-Qt-testnet.conf nPruneSize=6 ``` enabling prune option in the intro dialog ``` $ ./src/qt/bitcoin-qt -choosedatadir -testnet ```  has no effect: ``` $ grep Prune ~/.bitcoin/testnet3/debug.log 2019-12-08T10:04:41Z Prune configured to target 5722 MiB on disk for block and undo files. ``` --- With this PR: ``` $ grep Prune ~/.bitcoin/testnet3/debug.log 2019-12-08T10:20:35Z Prune configured to target 1907 MiB on disk for block and undo files. ``` This PR has been split of #17453 (the first two commits) as it fixes an orthogonal bug. Refs: - https://github.com/bitcoin/bitcoin/pull/17453#discussion_r345424240 - https://github.com/bitcoin/bitcoin/pull/17453#discussion_r350960201
Backport of Core PR17696
Test Plan:
ninja all check check-functional ./src/qt/bitcoin-qt -choosedatadir -testnet
start a new datadir with prune option selected, make sure the debug.log
returns the correct value (~2GB)
Reviewers: #bitcoin_abc, PiRK
Reviewed By: #bitcoin_abc, PiRK
Differential Revision: https://reviews.bitcoinabc.org/D8913