move-only: Extract common/args and common/config.cpp from util/system

This is an extraction of ArgsManager related functions from util/system
into their own common file.

Config file related functions are moved to common/config.cpp.

The background of this commit is an ongoing effort to decouple the
libbitcoinkernel library from the ArgsManager. The ArgsManager belongs
into the common library, since the kernel library should not depend on
it. See doc/design/libraries.md for more information on this rationale.

Author: TheCharlatan

ci/test/06_script_b.sh

@@ -42,6 +42,8 @@ if [ "${RUN_TIDY}" = "true" ]; then
   ( CI_EXEC run-clang-tidy-15 -quiet "${MAKEJOBS}" ) | grep -C5 "error"
   export P_CI_DIR="${BASE_BUILD_DIR}/bitcoin-$HOST/"
   CI_EXEC "python3 ${DIR_IWYU}/include-what-you-use/iwyu_tool.py"\
+          " src/common/args.cpp"\
+          " src/common/config.cpp"\
           " src/common/init.cpp"\
           " src/common/url.cpp"\
           " src/compat"\

src/Makefile.am

@@ -133,6 +133,7 @@ BITCOIN_CORE_H = \
   checkqueue.h \
   clientversion.h \
   coins.h \
+  common/args.h \
   common/bloom.h \
   common/init.h \
   common/run_command.h \
@@ -646,7 +647,9 @@ libbitcoin_common_a_SOURCES = \
   bech32.cpp \
   chainparams.cpp \
   coins.cpp \
+  common/args.cpp \
   common/bloom.cpp \
+  common/config.cpp \
   common/init.cpp \
   common/interfaces.cpp \
   common/run_command.cpp \
@@ -901,6 +904,8 @@ libbitcoinkernel_la_SOURCES = \
   chainparams.cpp \
   clientversion.cpp \
   coins.cpp \
+  common/args.cpp \
+  common/config.cpp \
   compressor.cpp \
   consensus/merkle.cpp \
   consensus/tx_check.cpp \

src/addrdb.cpp

@@ -8,6 +8,7 @@
 #include <addrman.h>
 #include <chainparams.h>
 #include <clientversion.h>
+#include <common/args.h>
 #include <cstdint>
 #include <hash.h>
 #include <logging.h>
@@ -21,7 +22,6 @@
 #include <util/fs.h>
 #include <util/fs_helpers.h>
 #include <util/settings.h>
-#include <util/system.h>
 #include <util/translation.h>
 
 namespace {

src/banman.cpp

@@ -5,6 +5,7 @@
 
 #include <banman.h>
 
+#include <logging.h>
 #include <netaddress.h>
 #include <node/interface_ui.h>
 #include <sync.h>

src/bench/bench_bitcoin.cpp

@@ -5,10 +5,10 @@
 #include <bench/bench.h>
 
 #include <clientversion.h>
+#include <common/args.h>
 #include <crypto/sha256.h>
 #include <util/fs.h>
 #include <util/strencodings.h>
-#include <util/system.h>
 
 #include <chrono>
 #include <cstdint>

src/bench/checkblock.cpp

@@ -6,9 +6,9 @@
 #include <bench/data.h>
 
 #include <chainparams.h>
+#include <common/args.h>
 #include <consensus/validation.h>
 #include <streams.h>
-#include <util/system.h>
 #include <validation.h>
 
 // These are the two major time-sinks which happen after we have fully received

src/bitcoin-chainstate.cpp

@@ -17,14 +17,14 @@
 #include <kernel/validation_cache_sizes.h>
 
 #include <chainparams.h>
+#include <common/args.h>
 #include <consensus/validation.h>
 #include <core_io.h>
 #include <node/blockstorage.h>
 #include <node/caches.h>
 #include <node/chainstate.h>
 #include <scheduler.h>
 #include <script/sigcache.h>
-#include <util/system.h>
 #include <util/thread.h>
 #include <validation.h>
 #include <validationinterface.h>

src/bitcoin-cli.cpp

@@ -9,6 +9,7 @@
 
 #include <chainparamsbase.h>
 #include <clientversion.h>
+#include <common/args.h>
 #include <common/url.h>
 #include <compat/compat.h>
 #include <compat/stdin.h>
@@ -22,6 +23,7 @@
 #include <util/exception.h>
 #include <util/strencodings.h>
 #include <util/system.h>
+#include <util/time.h>
 #include <util/translation.h>
 
 #include <algorithm>
@@ -1228,7 +1230,7 @@ static int CommandLineRPC(int argc, char *argv[])
 MAIN_FUNCTION
 {
 #ifdef WIN32
-    util::WinCmdLineArgs winArgs;
+    common::WinCmdLineArgs winArgs;
     std::tie(argc, argv) = winArgs.get();
 #endif
     SetupEnvironment();

src/bitcoin-tx.cpp

@@ -8,6 +8,7 @@
 
 #include <clientversion.h>
 #include <coins.h>
+#include <common/args.h>
 #include <compat/compat.h>
 #include <consensus/amount.h>
 #include <consensus/consensus.h>

src/bitcoin-util.cpp

@@ -11,6 +11,7 @@
 #include <chainparams.h>
 #include <chainparamsbase.h>
 #include <clientversion.h>
+#include <common/args.h>
 #include <compat/compat.h>
 #include <core_io.h>
 #include <streams.h>