Merge bitcoin/bitcoin#21850: Remove `GetDataDir(net_specific)` function

aca0e5dcdb174ef7e88b76910d6fffd633688235 Remove `GetDataDir(bool fNetSpecific = true)` function (Kiminuo)
b3e67f20a02bcf43f20873029ce30617c95eb9da scripted-diff: Replace `GetDataDir(true)` calls with `gArgs.GetDataDirNet()` calls (Kiminuo)
4c3a5dcbfc3010965332ad568c3a70618c930ef3 scripted-diff: Replace `GetDataDir()` calls with `gArgs.GetDataDirNet()` calls (Kiminuo)
13bd8bb0536f008118b1de921654925ed9ce1da7 Make `ArgsManager.GetDataDirPath` private and drop needless suffix (Kiminuo)
4d8189f62076d47be182e709857774bc3921b334 scripted-diff: Change `ArgsManager.GetDataDirPath()` to `ArgsManager.GetDataDirBase()` in tests (Kiminuo)
0f53df47d5b8319fc71f3b87c15a115ff797fb50 Add `ArgsManager.GetDataDirBase()` and `ArgsManager.GetDataDirNet()` as an intended replacement for `ArgsManager.GetDataDirPath(net_identifier)` (Kiminuo)
716de29dd8672d28bfe0a08424e9958fe61054d2 Make `m_cached_blocks_path` mutable. Make `ArgsManager::GetBlocksDirPath()` const. (Kiminuo)

Pull request description:

  This PR is a follow up PR to #21244. The PR attempts to move us an inch towards the [goal](https://github.com/bitcoin/bitcoin/pull/21244#discussion_r615307465) by removing `GetDataDir(net_specific)` and replacing it by `gArgs.GetDataDir(net_specific)` calls.

  The approach of this PR attempts to be similar to the one chosen in "De-globalize ChainstateManager" (#20158). The goal is to pass `ArgsManager` to functions (or ideally to have `ArgsManager` as a member of a class where needed; inspiration from here: #21789) instead of having it as a global variable (i.e. `gArgs`).

  **Notes:**
  * First commit makes `m_cached_blocks_path` `mutable` as was suggested [here](https://github.com/bitcoin/bitcoin/pull/21244#discussion_r615274095) but not fully applied in #21244. (`m_cached_datadir_path` and `m_cached_network_datadir_path` were marked as `mutable` in #21244) This commit can be in a separate PR too.
  * Other commits deal with removing of `GetDataDir(net_specific)` function.
      * This was originally part of #21244 but it was [left]((https://github.com/bitcoin/bitcoin/pull/21244#pullrequestreview-633779754)) for a follow up PR.
  * I think that the proposed changes show nicely where there is reliance on `gArgs` which is IMO a good thing.

  If you know about a better approach how to do this, please share it here.

ACKs for top commit:
  hebasto:
    ACK aca0e5dcdb174ef7e88b76910d6fffd633688235
  MarcoFalke:
    re-ACK aca0e5dcdb174ef7e88b76910d6fffd633688235 👃

Tree-SHA512: deec4d88edb32d7f4c818c3a74ffbb64709685819b88242dcf5dbaa1fb611f3ce2b29d2576ddb9e0dc5e75288e43538968224008c0a80e7149fc81c309f7c9da

1 files changed, 5 insertions, 5 deletions

diff --git a/src/init.cpp b/src/init.cpp
index 89e152e56f..593128747e 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1015,7 +1015,7 @@ bool AppInitParameterInteraction(const ArgsManager& args)
 static bool LockDataDirectory(bool probeOnly)
 {
     // Make sure only a single Bitcoin process is using the data directory.
-    fs::path datadir = GetDataDir();
+    fs::path datadir = gArgs.GetDataDirNet();
     if (!DirIsWritable(datadir)) {
         return InitError(strprintf(_("Cannot write to data directory '%s'; check permissions."), datadir.string()));
     }
@@ -1166,7 +1166,7 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
     assert(!node.addrman);
     node.addrman = std::make_unique<CAddrMan>();
     assert(!node.banman);
-    node.banman = std::make_unique<BanMan>(GetDataDir() / "banlist.dat", &uiInterface, args.GetArg("-bantime", DEFAULT_MISBEHAVING_BANTIME));
+    node.banman = std::make_unique<BanMan>(gArgs.GetDataDirNet() / "banlist.dat", &uiInterface, args.GetArg("-bantime", DEFAULT_MISBEHAVING_BANTIME));
     assert(!node.connman);
     node.connman = std::make_unique<CConnman>(GetRand(std::numeric_limits<uint64_t>::max()), GetRand(std::numeric_limits<uint64_t>::max()), *node.addrman, args.GetBoolArg("-networkactive", true));
 
@@ -1276,7 +1276,7 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
             asmap_path = DEFAULT_ASMAP_FILENAME;
         }
         if (!asmap_path.is_absolute()) {
-            asmap_path = GetDataDir() / asmap_path;
+            asmap_path = gArgs.GetDataDirNet() / asmap_path;
         }
         if (!fs::exists(asmap_path)) {
             InitError(strprintf(_("Could not find asmap file %s"), asmap_path));
@@ -1600,8 +1600,8 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
 
     // ********************************************************* Step 11: import blocks
 
-    if (!CheckDiskSpace(GetDataDir())) {
-        InitError(strprintf(_("Error: Disk space is low for %s"), GetDataDir()));
+    if (!CheckDiskSpace(gArgs.GetDataDirNet())) {
+        InitError(strprintf(_("Error: Disk space is low for %s"), gArgs.GetDataDirNet()));
         return false;
     }
     if (!CheckDiskSpace(gArgs.GetBlocksDirPath())) {