Merge bitcoin/bitcoin#32226: ci: switch to LLVM 20 in tidy job

08aa7fe ci: clang-tidy 20 (fanquake)
2b85d31 refactor: starts/ends_with changes for clang-tidy 20 (fanquake)

Pull request description:

  Switch to LLVM 20 in the tidy job.

ACKs for top commit:
  l0rinc:
    ACK 08aa7fe
  hebasto:
    ACK 08aa7fe.

Tree-SHA512: 54b6c64adcf7556edf3b30f87935de7868354e8ad252da834796f347a5a77feda01f145f17e5a7419cf6f3b4f87fc2b168c1ec2a2d13bb4e0ffcc0fac667fd42

Author: hebasto

ci/test/00_setup_env_native_tidy.sh

@@ -8,7 +8,7 @@ export LC_ALL=C.UTF-8
 
 export CI_IMAGE_NAME_TAG="mirror.gcr.io/ubuntu:24.04"
 export CONTAINER_NAME=ci_native_tidy
-export TIDY_LLVM_V="19"
+export TIDY_LLVM_V="20"
 export APT_LLVM_V="${TIDY_LLVM_V}"
 export PACKAGES="clang-${TIDY_LLVM_V} libclang-${TIDY_LLVM_V}-dev llvm-${TIDY_LLVM_V}-dev libomp-${TIDY_LLVM_V}-dev clang-tidy-${TIDY_LLVM_V} jq libevent-dev libboost-dev libzmq3-dev systemtap-sdt-dev qt6-base-dev qt6-tools-dev qt6-l10n-tools libqrencode-dev libsqlite3-dev libdb++-dev"
 export NO_DEPENDS=1

src/bitcoin-cli.cpp

@@ -1220,7 +1220,7 @@ static int CommandLineRPC(int argc, char *argv[])
         if (gArgs.GetBoolArg("-stdinwalletpassphrase", false)) {
             NO_STDIN_ECHO();
             std::string walletPass;
-            if (args.size() < 1 || args[0].substr(0, 16) != "walletpassphrase") {
+            if (args.size() < 1 || !args[0].starts_with("walletpassphrase")) {
                 throw std::runtime_error("-stdinwalletpassphrase is only applicable for walletpassphrase(change)");
             }
             if (!StdinReady()) {

src/common/args.cpp

@@ -85,7 +85,7 @@ KeyInfo InterpretKey(std::string key)
         result.section = key.substr(0, option_index);
         key.erase(0, option_index + 1);
     }
-    if (key.substr(0, 2) == "no") {
+    if (key.starts_with("no")) {
         key.erase(0, 2);
         result.negated = true;
     }
@@ -189,7 +189,7 @@ bool ArgsManager::ParseParameters(int argc, const char* const argv[], std::strin
         // internet" warning, and clicks the Open button, macOS passes
         // a unique process serial number (PSN) as -psn_... command-line
         // argument, which we filter out.
-        if (key.substr(0, 5) == "-psn_") continue;
+        if (key.starts_with("-psn_")) continue;
 #endif
 
         if (key == "-") break; //bitcoin-tx using stdin

src/common/config.cpp

@@ -65,7 +65,7 @@ static bool GetConfigOptions(std::istream& stream, const std::string& filepath,
                 }
             } else {
                 error = strprintf("parse error on line %i: %s", linenr, str);
-                if (str.size() >= 2 && str.substr(0, 2) == "no") {
+                if (str.size() >= 2 && str.starts_with("no")) {
                     error += strprintf(", if you intended to specify a negated option, use %s=1 instead", str);
                 }
                 return false;

src/core_read.cpp

@@ -83,7 +83,7 @@ CScript ParseScript(const std::string& s)
             }
 
             result << num.value();
-        } else if (w.substr(0, 2) == "0x" && w.size() > 2 && IsHex(std::string(w.begin() + 2, w.end()))) {
+        } else if (w.starts_with("0x") && w.size() > 2 && IsHex(std::string(w.begin() + 2, w.end()))) {
             // Raw hex data, inserted NOT pushed onto stack:
             std::vector<unsigned char> raw = ParseHex(std::string(w.begin() + 2, w.end()));
             result.insert(result.end(), raw.begin(), raw.end());

src/httprpc.cpp

@@ -134,7 +134,7 @@ static bool multiUserAuthorized(std::string strUserPass)
 
 static bool RPCAuthorized(const std::string& strAuth, std::string& strAuthUsernameOut)
 {
-    if (strAuth.substr(0, 6) != "Basic ")
+    if (!strAuth.starts_with("Basic "))
         return false;
     std::string_view strUserPass64 = TrimStringView(std::string_view{strAuth}.substr(6));
     auto userpass_data = DecodeBase64(strUserPass64);

src/i2p.cpp

@@ -299,7 +299,7 @@ Session::Reply Session::SendRequestAndGetReply(const Sock& sock,
     Reply reply;
 
     // Don't log the full "SESSION CREATE ..." because it contains our private key.
-    reply.request = request.substr(0, 14) == "SESSION CREATE" ? "SESSION CREATE ..." : request;
+    reply.request = request.starts_with("SESSION CREATE") ? "SESSION CREATE ..." : request;
 
     // It could take a few minutes for the I2P router to reply as it is querying the I2P network
     // (when doing name lookup, for example). Notice: `RecvUntilTerminator()` is checking

src/node/blockstorage.cpp

@@ -624,11 +624,11 @@ void BlockManager::CleanupBlockRevFiles() const
         const std::string path = fs::PathToString(it->path().filename());
         if (fs::is_regular_file(*it) &&
             path.length() == 12 &&
-            path.substr(8,4) == ".dat")
+            path.ends_with(".dat"))
         {
-            if (path.substr(0, 3) == "blk") {
+            if (path.starts_with("blk")) {
                 mapBlockFiles[path.substr(3, 5)] = it->path();
-            } else if (path.substr(0, 3) == "rev") {
+            } else if (path.starts_with("rev")) {
                 remove(it->path());
             }
         }

src/qt/test/rpcnestedtests.cpp

@@ -64,13 +64,13 @@ void RPCNestedTests::rpcNestedTests()
     RPCConsole::RPCExecuteCommandLine(m_node, result, "getblock( getblock( getblock(getbestblockhash())[hash] )[hash], true)"); //4 level nesting with whitespace, filtering path and boolean parameter
 
     RPCConsole::RPCExecuteCommandLine(m_node, result, "getblockchaininfo");
-    QVERIFY(result.substr(0,1) == "{");
+    QVERIFY(result.starts_with("{"));
 
     RPCConsole::RPCExecuteCommandLine(m_node, result, "getblockchaininfo()");
-    QVERIFY(result.substr(0,1) == "{");
+    QVERIFY(result.starts_with("{"));
 
     RPCConsole::RPCExecuteCommandLine(m_node, result, "getblockchaininfo "); //whitespace at the end will be tolerated
-    QVERIFY(result.substr(0,1) == "{");
+    QVERIFY(result.starts_with("{"));
 
     RPCConsole::RPCExecuteCommandLine(m_node, result, "getblockchaininfo()[\"chain\"]"); //Quote path identifier are allowed, but look after a child containing the quotes in the key
     QVERIFY(result == "null");

src/util/string.h

@@ -168,7 +168,7 @@ std::vector<T> Split(const std::span<const char>& sp, char sep)
 
 [[nodiscard]] inline std::string_view RemovePrefixView(std::string_view str, std::string_view prefix)
 {
-    if (str.substr(0, prefix.size()) == prefix) {
+    if (str.starts_with(prefix)) {
         return str.substr(prefix.size());
     }
     return str;