chore(3p/nix): apply google-readability-casting

Command run: jq <compile_commands.json -r 'map(.file)|.[]' | grep -v '/generated/' | parallel clang-tidy -p compile_commands.json -checks=-*,google-readability-casting --fix

Manual fixes applied in src/nix-env/nix-env.cc, src/libstore/store-api.cc

Change-Id: I406b4be9368c557ca59329bf6f7002704e955f8d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1557
Tested-by: BuildkiteCI
Reviewed-by: glittershark <grfn@gws.fyi>
Reviewed-by: tazjin <mail@tazj.in>

third_party/nix/src/libstore/binary-cache-store.cc

@@ -88,7 +88,7 @@ void BinaryCacheStore::getFile(const std::string& path, Sink& sink) {
             }
           }});
   auto data = promise.get_future().get();
-  sink((unsigned char*)data->data(), data->size());
+  sink(reinterpret_cast<unsigned char*>(data->data()), data->size());
 }
 
 std::shared_ptr<std::string> BinaryCacheStore::getFile(
@@ -206,7 +206,9 @@ void BinaryCacheStore::addToStore(const ValidPathInfo& info,
           .count();
   DLOG(INFO) << "copying path '" << narInfo->path << "' (" << narInfo->narSize
              << " bytes, compressed "
-             << ((1.0 - (double)narCompressed->size() / nar->size()) * 100.0)
+             << ((1.0 -
+                  static_cast<double>(narCompressed->size()) / nar->size()) *
+                 100.0)
              << "% in " << duration << "ms) to binary cache";
 
   /* Atomically write the NAR file. */
@@ -288,9 +290,8 @@ void BinaryCacheStore::queryPathInfoUncached(
 
               stats.narInfoRead++;
 
-              (*callbackPtr)(
-                  (std::shared_ptr<ValidPathInfo>)std::make_shared<NarInfo>(
-                      *this, *data, narInfoFile));
+              (*callbackPtr)(std::shared_ptr<ValidPathInfo>(
+                  std::make_shared<NarInfo>(*this, *data, narInfoFile)));
 
             } catch (...) {
               callbackPtr->rethrow();

third_party/nix/src/libstore/build.cc

@@ -1589,11 +1589,13 @@ MakeError(NotDeterministic, BuildError)
           8ULL * 1024 * 1024;  // FIXME: make configurable
       struct statvfs st;
       if (statvfs(worker.store.realStoreDir.c_str(), &st) == 0 &&
-          (unsigned long long)st.f_bavail * st.f_bsize < required) {
+          static_cast<unsigned long long>(st.f_bavail) * st.f_bsize <
+              required) {
         diskFull = true;
       }
       if (statvfs(tmpDir.c_str(), &st) == 0 &&
-          (unsigned long long)st.f_bavail * st.f_bsize < required) {
+          static_cast<unsigned long long>(st.f_bavail) * st.f_bsize <
+              required) {
         diskFull = true;
       }
 #endif
@@ -1832,7 +1834,7 @@ void chmod_(const Path& path, mode_t mode) {
 }
 
 int childEntry(void* arg) {
-  ((DerivationGoal*)arg)->runChild();
+  (static_cast<DerivationGoal*>(arg))->runChild();
   return 1;
 }
 
@@ -2361,9 +2363,9 @@ void DerivationGoal::startBuilder() {
           }
 
           size_t stackSize = 1 * 1024 * 1024;
-          char* stack =
-              (char*)mmap(nullptr, stackSize, PROT_WRITE | PROT_READ,
-                          MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
+          char* stack = static_cast<char*>(
+              mmap(nullptr, stackSize, PROT_WRITE | PROT_READ,
+                   MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0));
           if (stack == MAP_FAILED) {
             throw SysError("allocating stack");
           }
@@ -4483,9 +4485,9 @@ void Worker::waitForInput() {
   }
   if (nearest != steady_time_point::max()) {
     timeout.tv_sec = std::max(
-        1L,
-        (long)std::chrono::duration_cast<std::chrono::seconds>(nearest - before)
-            .count());
+        1L, static_cast<long>(std::chrono::duration_cast<std::chrono::seconds>(
+                                  nearest - before)
+                                  .count()));
     useTimeout = true;
   }
 
@@ -4500,10 +4502,11 @@ void Worker::waitForInput() {
       lastWokenUp = before;
     }
     timeout.tv_sec = std::max(
-        1L,
-        (long)std::chrono::duration_cast<std::chrono::seconds>(
-            lastWokenUp + std::chrono::seconds(settings.pollInterval) - before)
-            .count());
+        1L, static_cast<long>(std::chrono::duration_cast<std::chrono::seconds>(
+                                  lastWokenUp +
+                                  std::chrono::seconds(settings.pollInterval) -
+                                  before)
+                                  .count()));
   } else {
     lastWokenUp = steady_time_point::min();
   }
@@ -4568,7 +4571,7 @@ void Worker::waitForInput() {
           }
         } else {
           DLOG(INFO) << goal->getName() << ": read " << rd << " bytes";
-          std::string data((char*)buffer.data(), rd);
+          std::string data(reinterpret_cast<char*>(buffer.data()), rd);
           j->lastOutput = after;
           goal->handleChildOutput(k, data);
         }

third_party/nix/src/libstore/crypto.cc

@@ -58,7 +58,8 @@ std::string SecretKey::signDetached(const std::string& data) const {
   unsigned long long sigLen;
   crypto_sign_detached(sig, &sigLen, (unsigned char*)data.data(), data.size(),
                        (unsigned char*)key.data());
-  return name + ":" + absl::Base64Escape(std::string((char*)sig, sigLen));
+  return name + ":" +
+         absl::Base64Escape(std::string(reinterpret_cast<char*>(sig), sigLen));
 #else
   noSodium();
 #endif
@@ -68,7 +69,8 @@ PublicKey SecretKey::toPublicKey() const {
 #if HAVE_SODIUM
   unsigned char pk[crypto_sign_PUBLICKEYBYTES];
   crypto_sign_ed25519_sk_to_pk(pk, (unsigned char*)key.data());
-  return PublicKey(name, std::string((char*)pk, crypto_sign_PUBLICKEYBYTES));
+  return PublicKey(name, std::string(reinterpret_cast<char*>(pk),
+                                     crypto_sign_PUBLICKEYBYTES));
 #else
   noSodium();
 #endif
@@ -102,8 +104,9 @@ bool verifyDetached(const std::string& data, const std::string& sig,
   }
 
   return crypto_sign_verify_detached(
-             (unsigned char*)sig2.data(), (unsigned char*)data.data(),
-             data.size(), (unsigned char*)key->second.key.data()) == 0;
+             reinterpret_cast<unsigned char*>(sig2.data()),
+             (unsigned char*)data.data(), data.size(),
+             (unsigned char*)key->second.key.data()) == 0;
 #else
   noSodium();
 #endif

third_party/nix/src/libstore/download.cc

@@ -160,7 +160,7 @@ struct CurlDownloader : public Downloader {
           decompressionSink = makeDecompressionSink(encoding, finalSink);
         }
 
-        (*decompressionSink)((unsigned char*)contents, realSize);
+        (*decompressionSink)(static_cast<unsigned char*>(contents), realSize);
 
         return realSize;
       } catch (...) {
@@ -171,12 +171,13 @@ struct CurlDownloader : public Downloader {
 
     static size_t writeCallbackWrapper(void* contents, size_t size,
                                        size_t nmemb, void* userp) {
-      return ((DownloadItem*)userp)->writeCallback(contents, size, nmemb);
+      return (static_cast<DownloadItem*>(userp))
+          ->writeCallback(contents, size, nmemb);
     }
 
     size_t headerCallback(void* contents, size_t size, size_t nmemb) {
       size_t realSize = size * nmemb;
-      std::string line((char*)contents, realSize);
+      std::string line(static_cast<char*>(contents), realSize);
       DLOG(INFO) << "got header for '" << request.uri
                  << "': " << absl::StripAsciiWhitespace(line);
       if (line.compare(0, 5, "HTTP/") == 0) {  // new response starts
@@ -219,7 +220,8 @@ struct CurlDownloader : public Downloader {
 
     static size_t headerCallbackWrapper(void* contents, size_t size,
                                         size_t nmemb, void* userp) {
-      return ((DownloadItem*)userp)->headerCallback(contents, size, nmemb);
+      return (static_cast<DownloadItem*>(userp))
+          ->headerCallback(contents, size, nmemb);
     }
 
     static int debugCallback(CURL* handle, curl_infotype type, char* data,
@@ -246,7 +248,8 @@ struct CurlDownloader : public Downloader {
 
     static size_t readCallbackWrapper(char* buffer, size_t size, size_t nitems,
                                       void* userp) {
-      return ((DownloadItem*)userp)->readCallback(buffer, size, nitems);
+      return (static_cast<DownloadItem*>(userp))
+          ->readCallback(buffer, size, nitems);
     }
 
     void init() {
@@ -580,9 +583,10 @@ struct CurlDownloader : public Downloader {
           nextWakeup != std::chrono::steady_clock::time_point()
               ? std::max(
                     0,
-                    (int)std::chrono::duration_cast<std::chrono::milliseconds>(
-                        nextWakeup - std::chrono::steady_clock::now())
-                        .count())
+                    static_cast<int>(
+                        std::chrono::duration_cast<std::chrono::milliseconds>(
+                            nextWakeup - std::chrono::steady_clock::now())
+                            .count()))
               : maxSleepTimeMs;
       DLOG(INFO) << "download thread waiting for " << sleepTimeMs << " ms";
       mc = curl_multi_wait(curlm, extraFDs, 1, sleepTimeMs, &numfds);
@@ -846,7 +850,7 @@ void Downloader::download(DownloadRequest&& request, Sink& sink) {
        if it's blocked on a full buffer. We don't hold the state
        lock while doing this to prevent blocking the download
        thread if sink() takes a long time. */
-    sink((unsigned char*)chunk.data(), chunk.size());
+    sink(reinterpret_cast<unsigned char*>(chunk.data()), chunk.size());
   }
 }
 
@@ -902,7 +906,8 @@ CachedDownloadResult Downloader::downloadCached(
       if (ss.size() >= 3 && ss[0] == url) {
         time_t lastChecked;
         if (absl::SimpleAtoi(ss[2], &lastChecked) &&
-            (uint64_t)lastChecked + request.ttl >= (uint64_t)time(nullptr)) {
+            static_cast<uint64_t>(lastChecked) + request.ttl >=
+                static_cast<uint64_t>(time(nullptr))) {
           skip = true;
           result.effectiveUri = request.uri;
           result.etag = ss[1];

third_party/nix/src/libstore/gc.cc

@@ -241,7 +241,8 @@ void LocalStore::findTempRoots(FDs& fds, Roots& tempRoots, bool censor) {
     std::string::size_type pos = 0;
     std::string::size_type end;
 
-    while ((end = contents.find((char)0, pos)) != std::string::npos) {
+    while ((end = contents.find(static_cast<char>(0), pos)) !=
+           std::string::npos) {
       Path root(contents, pos, end - pos);
       DLOG(INFO) << "got temporary root " << root;
       assertStorePath(root);
@@ -916,7 +917,7 @@ void LocalStore::autoGC(bool sync) {
       throw SysError("getting filesystem info about '%s'", realStoreDir);
     }
 
-    return (uint64_t)st.f_bavail * st.f_bsize;
+    return static_cast<uint64_t>(st.f_bavail) * st.f_bsize;
   };
 
   std::shared_future<void> future;

third_party/nix/src/libstore/legacy-ssh-store.cc

@@ -214,7 +214,7 @@ struct LegacySSHStore : public Store {
     conn->to.flush();
 
     BuildResult status;
-    status.status = (BuildResult::Status)readInt(conn->from);
+    status.status = static_cast<BuildResult::Status>(readInt(conn->from));
     conn->from >> status.errorMsg;
 
     if (GET_PROTOCOL_MINOR(conn->remoteVersion) >= 3) {

third_party/nix/src/libstore/local-fs-store.cc

@@ -41,7 +41,7 @@ struct LocalStoreAccessor : public FSAccessor {
     return {S_ISREG(st.st_mode)
                 ? Type::tRegular
                 : S_ISLNK(st.st_mode) ? Type::tSymlink : Type::tDirectory,
-            S_ISREG(st.st_mode) ? (uint64_t)st.st_size : 0,
+            S_ISREG(st.st_mode) ? static_cast<uint64_t>(st.st_size) : 0,
             S_ISREG(st.st_mode) && ((st.st_mode & S_IXUSR) != 0u)};
   }
 

third_party/nix/src/libstore/local-store.cc

@@ -350,7 +350,8 @@ void LocalStore::openDB(State& state, bool create) {
     if (sqlite3_step(stmt) != SQLITE_ROW) {
       throwSQLiteError(db, "querying journal mode");
     }
-    prevMode = std::string((const char*)sqlite3_column_text(stmt, 0));
+    prevMode = std::string(
+        reinterpret_cast<const char*>(sqlite3_column_text(stmt, 0)));
   }
   if (prevMode != mode &&
       sqlite3_exec(db, ("pragma main.journal_mode = " + mode + ";").c_str(),
@@ -489,7 +490,7 @@ static void canonicalisePathMetaData_(const Path& path, uid_t fromUid,
      However, ignore files that we chown'ed ourselves previously to
      ensure that we don't fail on hard links within the same build
      (i.e. "touch $out/foo; ln $out/foo $out/bar"). */
-  if (fromUid != (uid_t)-1 && st.st_uid != fromUid) {
+  if (fromUid != static_cast<uid_t>(-1) && st.st_uid != fromUid) {
     if (S_ISDIR(st.st_mode)) {
       throw BuildError(format("invalid file '%1%': is a directory") % path);
     }
@@ -690,7 +691,8 @@ void LocalStore::queryPathInfoUncached(
 
       info->registrationTime = useQueryPathInfo.getInt(2);
 
-      auto s = (const char*)sqlite3_column_text(state->stmtQueryPathInfo, 3);
+      auto s = reinterpret_cast<const char*>(
+          sqlite3_column_text(state->stmtQueryPathInfo, 3));
       if (s != nullptr) {
         info->deriver = s;
       }
@@ -700,12 +702,14 @@ void LocalStore::queryPathInfoUncached(
 
       info->ultimate = useQueryPathInfo.getInt(5) == 1;
 
-      s = (const char*)sqlite3_column_text(state->stmtQueryPathInfo, 6);
+      s = reinterpret_cast<const char*>(
+          sqlite3_column_text(state->stmtQueryPathInfo, 6));
       if (s != nullptr) {
         info->sigs = absl::StrSplit(s, absl::ByChar(' '), absl::SkipEmpty());
       }
 
-      s = (const char*)sqlite3_column_text(state->stmtQueryPathInfo, 7);
+      s = reinterpret_cast<const char*>(
+          sqlite3_column_text(state->stmtQueryPathInfo, 7));
       if (s != nullptr) {
         info->ca = s;
       }
@@ -860,8 +864,8 @@ Path LocalStore::queryPathFromHashPart(const std::string& hashPart) {
       return "";
     }
 
-    const char* s =
-        (const char*)sqlite3_column_text(state->stmtQueryPathFromHashPart, 0);
+    const char* s = reinterpret_cast<const char*>(
+        sqlite3_column_text(state->stmtQueryPathFromHashPart, 0));
     return (s != nullptr) &&
                    prefix.compare(0, prefix.size(), s, prefix.size()) == 0
                ? s

third_party/nix/src/libstore/nar-accessor.cc

@@ -76,7 +76,7 @@ struct NarAccessor : public FSAccessor {
     void preallocateContents(unsigned long long size) override {
       currentStart = std::string(s, pos, 16);
       assert(size <= std::numeric_limits<size_t>::max());
-      parents.top()->size = (size_t)size;
+      parents.top()->size = static_cast<size_t>(size);
       parents.top()->start = pos;
     }
 

third_party/nix/src/libstore/nar-info-disk-cache.cc

@@ -164,8 +164,9 @@ class NarInfoDiskCacheImpl final : public NarInfoDiskCache {
               static_cast<int64_t>(wantMassQuery))(priority)
           .exec();
       assert(sqlite3_changes(state->db) == 1);
-      state->caches[uri] = Cache{(int)sqlite3_last_insert_rowid(state->db),
-                                 storeDir, wantMassQuery, priority};
+      state->caches[uri] =
+          Cache{static_cast<int>(sqlite3_last_insert_rowid(state->db)),
+                storeDir, wantMassQuery, priority};
     });
   }
 
@@ -181,8 +182,9 @@ class NarInfoDiskCacheImpl final : public NarInfoDiskCache {
           return false;
         }
         state->caches.emplace(
-            uri, Cache{(int)queryCache.getInt(0), queryCache.getStr(1),
-                       queryCache.getInt(2) != 0, (int)queryCache.getInt(3)});
+            uri, Cache{static_cast<int>(queryCache.getInt(0)),
+                       queryCache.getStr(1), queryCache.getInt(2) != 0,
+                       static_cast<int>(queryCache.getInt(3))});
       }
 
       auto& cache(getCache(*state, uri));

third_party/nix/src/libstore/remote-fs-accessor.cc

@@ -75,12 +75,14 @@ std::pair<ref<FSAccessor>, Path> RemoteFSAccessor::fetch(const Path& path_) {
               throw SysError("opening NAR cache file '%s'", cacheFile);
             }
 
-            if (lseek(fd.get(), offset, SEEK_SET) != (off_t)offset) {
+            if (lseek(fd.get(), offset, SEEK_SET) !=
+                static_cast<off_t>(offset)) {
               throw SysError("seeking in '%s'", cacheFile);
             }
 
             std::string buf(length, 0);
-            readFull(fd.get(), (unsigned char*)buf.data(), length);
+            readFull(fd.get(), reinterpret_cast<unsigned char*>(buf.data()),
+                     length);
 
             return buf;
           });

third_party/nix/src/libstore/remote-store.cc

@@ -546,7 +546,7 @@ BuildResult RemoteStore::buildDerivation(const Path& drvPath,
   BuildResult res;
   unsigned int status;
   conn->from >> status >> res.errorMsg;
-  res.status = (BuildResult::Status)status;
+  res.status = static_cast<BuildResult::Status>(status);
   return res;
 }
 

third_party/nix/src/libstore/sqlite.cc

@@ -133,7 +133,7 @@ bool SQLiteStmt::Use::next() {
 }
 
 std::string SQLiteStmt::Use::getStr(int col) {
-  auto s = (const char*)sqlite3_column_text(stmt, col);
+  auto s = reinterpret_cast<const char*>(sqlite3_column_text(stmt, col));
   assert(s);
   return s;
 }

third_party/nix/src/libstore/ssh.cc

@@ -111,7 +111,7 @@ Path SSHMaster::startMaster() {
   state->tmpDir =
       std::make_unique<AutoDelete>(createTempDir("", "nix", true, true, 0700));
 
-  state->socketPath = (Path)*state->tmpDir + "/ssh.sock";
+  state->socketPath = Path(*state->tmpDir) + "/ssh.sock";
 
   Pipe out;
   out.create();

third_party/nix/src/libstore/store-api.cc

@@ -304,8 +304,8 @@ Path Store::makeFixedOutputPath(bool recursive, const Hash& hash,
                    "output:out",
                    hashString(
                        htSHA256,
-                       "fixed:out:" + (recursive ? (std::string) "r:" : "") +
-                           hash.to_string(Base16) + ":"),
+                       absl::StrCat("fixed:out:", (recursive ? "r:" : ""),
+                                    hash.to_string(Base16), ":")),
                    name);
 }
 
@@ -926,7 +926,7 @@ Strings ValidPathInfo::shortRefs() const {
 }
 
 std::string makeFixedOutputCA(bool recursive, const Hash& hash) {
-  return "fixed:" + (recursive ? (std::string) "r:" : "") + hash.to_string();
+  return "fixed:" + (recursive ? std::string("r:") : "") + hash.to_string();
 }
 
 void Store::addToStore(const ValidPathInfo& info, Source& narSource,