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-rw-r--r--third_party/nix/src/libstore/binary-cache-store.cc3
-rw-r--r--third_party/nix/src/libstore/build.cc3
-rw-r--r--third_party/nix/src/libstore/builtins/buildenv.cc6
-rw-r--r--third_party/nix/src/libstore/derivations.cc3
-rw-r--r--third_party/nix/src/libstore/download.cc7
-rw-r--r--third_party/nix/src/libstore/gc.cc4
-rw-r--r--third_party/nix/src/libstore/globals.cc6
-rw-r--r--third_party/nix/src/libstore/local-store.cc8
-rw-r--r--third_party/nix/src/libstore/local-store.hh4
-rw-r--r--third_party/nix/src/libstore/machines.cc20
-rw-r--r--third_party/nix/src/libstore/nar-info-disk-cache.cc7
-rw-r--r--third_party/nix/src/libstore/nar-info.cc3
-rw-r--r--third_party/nix/src/libstore/parsed-derivations.cc3
-rw-r--r--third_party/nix/src/libstore/ssh.cc3
-rw-r--r--third_party/nix/src/libstore/store-api.cc3
15 files changed, 48 insertions, 35 deletions
diff --git a/third_party/nix/src/libstore/binary-cache-store.cc b/third_party/nix/src/libstore/binary-cache-store.cc
index b862ea0058..fce4dc0e11 100644
--- a/third_party/nix/src/libstore/binary-cache-store.cc
+++ b/third_party/nix/src/libstore/binary-cache-store.cc
@@ -42,7 +42,8 @@ void BinaryCacheStore::init() {
     upsertFile(cacheInfoFile, "StoreDir: " + storeDir + "\n",
                "text/x-nix-cache-info");
   } else {
-    for (auto& line : absl::StrSplit(*cacheInfo, absl::ByChar('\n'))) {
+    for (auto& line :
+         absl::StrSplit(*cacheInfo, absl::ByChar('\n'), absl::SkipEmpty())) {
       size_t colon = line.find(':');
       if (colon == std::string::npos) {
         continue;
diff --git a/third_party/nix/src/libstore/build.cc b/third_party/nix/src/libstore/build.cc
index 27d6aa611f..9bff3b8345 100644
--- a/third_party/nix/src/libstore/build.cc
+++ b/third_party/nix/src/libstore/build.cc
@@ -2485,7 +2485,8 @@ void DerivationGoal::initTmpDir() {
      there is no size constraint). */
   if (!parsedDrv->getStructuredAttrs()) {
     std::set<std::string> passAsFile =
-        absl::StrSplit(get(drv->env, "passAsFile"), absl::ByAnyChar(" \t\n\r"));
+        absl::StrSplit(get(drv->env, "passAsFile"), absl::ByAnyChar(" \t\n\r"),
+                       absl::SkipEmpty());
     for (auto& i : drv->env) {
       if (passAsFile.find(i.first) == passAsFile.end()) {
         env[i.first] = i.second;
diff --git a/third_party/nix/src/libstore/builtins/buildenv.cc b/third_party/nix/src/libstore/builtins/buildenv.cc
index 95f915227b..7ef7e2c25a 100644
--- a/third_party/nix/src/libstore/builtins/buildenv.cc
+++ b/third_party/nix/src/libstore/builtins/buildenv.cc
@@ -137,7 +137,7 @@ static void addPkg(const Path& pkgDir, int priority) {
   try {
     for (auto p : absl::StrSplit(
              readFile(pkgDir + "/nix-support/propagated-user-env-packages"),
-             absl::ByAnyChar(" \n"))) {
+             absl::ByAnyChar(" \n"), absl::SkipEmpty())) {
       auto pkg = std::string(p);
       if (!done.count(pkg)) {
         postponed.insert(pkg);
@@ -175,8 +175,8 @@ void builtinBuildenv(const BasicDerivation& drv) {
   /* Convert the stuff we get from the environment back into a
    * coherent data type. */
   Packages pkgs;
-  Strings derivations =
-      absl::StrSplit(getAttr("derivations"), absl::ByAnyChar(" \t\n\r"));
+  Strings derivations = absl::StrSplit(
+      getAttr("derivations"), absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty());
   while (!derivations.empty()) {
     /* !!! We're trusting the caller to structure derivations env var correctly
      */
diff --git a/third_party/nix/src/libstore/derivations.cc b/third_party/nix/src/libstore/derivations.cc
index 0e8b637fa7..b7dcded3de 100644
--- a/third_party/nix/src/libstore/derivations.cc
+++ b/third_party/nix/src/libstore/derivations.cc
@@ -421,7 +421,8 @@ DrvPathWithOutputs parseDrvPathWithOutputs(absl::string_view path) {
 
   return DrvPathWithOutputs(
       path.substr(0, pos),
-      absl::StrSplit(path.substr(pos + 1), absl::ByChar(',')));
+      absl::StrSplit(path.substr(pos + 1), absl::ByChar(','),
+                     absl::SkipEmpty()));
 }
 
 Path makeDrvPathWithOutputs(const Path& drvPath,
diff --git a/third_party/nix/src/libstore/download.cc b/third_party/nix/src/libstore/download.cc
index fdc14b3762..cf64a6bad7 100644
--- a/third_party/nix/src/libstore/download.cc
+++ b/third_party/nix/src/libstore/download.cc
@@ -181,7 +181,8 @@ struct CurlDownloader : public Downloader {
                  << "': " << absl::StripAsciiWhitespace(line);
       if (line.compare(0, 5, "HTTP/") == 0) {  // new response starts
         result.etag = "";
-        std::vector<std::string> ss = absl::StrSplit(line, absl::ByChar(' '));
+        std::vector<std::string> ss =
+            absl::StrSplit(line, absl::ByChar(' '), absl::SkipEmpty());
         status = ss.size() >= 2 ? ss[1] : "";
         result.data = std::make_shared<std::string>();
         result.bodySize = 0;
@@ -896,8 +897,8 @@ CachedDownloadResult Downloader::downloadCached(
     storePath = readLink(fileLink);
     store->addTempRoot(storePath);
     if (store->isValidPath(storePath)) {
-      std::vector<std::string> ss =
-          absl::StrSplit(readFile(dataFile), absl::ByChar('\n'));
+      std::vector<std::string> ss = absl::StrSplit(
+          readFile(dataFile), absl::ByChar('\n'), absl::SkipEmpty());
       if (ss.size() >= 3 && ss[0] == url) {
         time_t lastChecked;
         if (absl::SimpleAtoi(ss[2], &lastChecked) &&
diff --git a/third_party/nix/src/libstore/gc.cc b/third_party/nix/src/libstore/gc.cc
index 9a6d97eb73..a491d7e32c 100644
--- a/third_party/nix/src/libstore/gc.cc
+++ b/third_party/nix/src/libstore/gc.cc
@@ -423,8 +423,8 @@ void LocalStore::findRuntimeRoots(Roots& roots, bool censor) {
 
         try {
           auto mapFile = fmt("/proc/%s/maps", ent->d_name);
-          std::vector<std::string> mapLines =
-              absl::StrSplit(readFile(mapFile, true), absl::ByChar('\n'));
+          std::vector<std::string> mapLines = absl::StrSplit(
+              readFile(mapFile, true), absl::ByChar('\n'), absl::SkipEmpty());
           for (const auto& line : mapLines) {
             auto match = std::smatch{};
             if (std::regex_match(line, match, mapRegex)) {
diff --git a/third_party/nix/src/libstore/globals.cc b/third_party/nix/src/libstore/globals.cc
index 06ef3dd040..1e194135cc 100644
--- a/third_party/nix/src/libstore/globals.cc
+++ b/third_party/nix/src/libstore/globals.cc
@@ -59,14 +59,14 @@ Settings::Settings()
   auto s = getEnv("NIX_REMOTE_SYSTEMS");
   if (!s.empty()) {
     Strings ss;
-    for (auto p : absl::StrSplit(s, absl::ByChar(':'))) {
+    for (auto p : absl::StrSplit(s, absl::ByChar(':'), absl::SkipEmpty())) {
       ss.push_back(absl::StrCat("@", p));
     }
     builders = concatStringsSep(" ", ss);
   }
 
-  sandboxPaths =
-      absl::StrSplit("/bin/sh=" SANDBOX_SHELL, absl::ByAnyChar(" \t\n\r"));
+  sandboxPaths = absl::StrSplit("/bin/sh=" SANDBOX_SHELL,
+                                absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty());
 }
 
 void loadConfFile() {
diff --git a/third_party/nix/src/libstore/local-store.cc b/third_party/nix/src/libstore/local-store.cc
index 3ad574186b..9b19e078b8 100644
--- a/third_party/nix/src/libstore/local-store.cc
+++ b/third_party/nix/src/libstore/local-store.cc
@@ -468,9 +468,9 @@ static void canonicalisePathMetaData_(const Path& path, uid_t fromUid,
       throw SysError("querying extended attributes of '%s'", path);
     }
 
-    for (auto& eaName :
-         absl::StrSplit(std::string(eaBuf.data(), eaSize),
-                        absl::ByString(std::string("\000", 1)))) {
+    for (auto& eaName : absl::StrSplit(std::string(eaBuf.data(), eaSize),
+                                       absl::ByString(std::string("\000", 1)),
+                                       absl::SkipEmpty())) {
       /* Ignore SELinux security labels since these cannot be
          removed even by root. */
       if (eaName == "security.selinux") {
@@ -702,7 +702,7 @@ void LocalStore::queryPathInfoUncached(
 
       s = (const char*)sqlite3_column_text(state->stmtQueryPathInfo, 6);
       if (s != nullptr) {
-        info->sigs = absl::StrSplit(s, absl::ByChar(' '));
+        info->sigs = absl::StrSplit(s, absl::ByChar(' '), absl::SkipEmpty());
       }
 
       s = (const char*)sqlite3_column_text(state->stmtQueryPathInfo, 7);
diff --git a/third_party/nix/src/libstore/local-store.hh b/third_party/nix/src/libstore/local-store.hh
index 7ad9de3a8a..731cf1764c 100644
--- a/third_party/nix/src/libstore/local-store.hh
+++ b/third_party/nix/src/libstore/local-store.hh
@@ -97,8 +97,8 @@ class LocalStore : public LocalFSStore {
  public:
   // Hack for build-remote.cc.
   // TODO(tazjin): remove this when we've got gRPC
-  PathSet locksHeld =
-      absl::StrSplit(getEnv("NIX_HELD_LOCKS"), absl::ByAnyChar(" \t\n\r"));
+  PathSet locksHeld = absl::StrSplit(
+      getEnv("NIX_HELD_LOCKS"), absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty());
 
   /* Initialise the local store, upgrading the schema if
      necessary. */
diff --git a/third_party/nix/src/libstore/machines.cc b/third_party/nix/src/libstore/machines.cc
index e5d22c534c..57c89e0692 100644
--- a/third_party/nix/src/libstore/machines.cc
+++ b/third_party/nix/src/libstore/machines.cc
@@ -52,7 +52,8 @@ bool Machine::mandatoryMet(const std::set<std::string>& features) const {
 }
 
 void parseMachines(const std::string& s, Machines& machines) {
-  for (auto line : absl::StrSplit(s, absl::ByAnyChar("\n;"))) {
+  for (auto line :
+       absl::StrSplit(s, absl::ByAnyChar("\n;"), absl::SkipEmpty())) {
     // Skip empty lines & comments
     line = absl::StripAsciiWhitespace(line);
     if (line.empty() || line[line.find_first_not_of(" \t")] == '#') {
@@ -73,7 +74,7 @@ void parseMachines(const std::string& s, Machines& machines) {
     }
 
     std::vector<std::string> tokens =
-        absl::StrSplit(line, absl::ByAnyChar(" \t\n\r"));
+        absl::StrSplit(line, absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty());
     auto sz = tokens.size();
     if (sz < 1) {
       throw FormatError("bad machine specification '%s'", line);
@@ -86,14 +87,17 @@ void parseMachines(const std::string& s, Machines& machines) {
     // TODO(tazjin): what???
     machines.emplace_back(
         tokens[0],
-        isSet(1) ? absl::StrSplit(tokens[1], absl::ByChar(','))
-                 : std::vector<std::string>{settings.thisSystem},
+        isSet(1)
+            ? absl::StrSplit(tokens[1], absl::ByChar(','), absl::SkipEmpty())
+            : std::vector<std::string>{settings.thisSystem},
         isSet(2) ? tokens[2] : "", isSet(3) ? std::stoull(tokens[3]) : 1LL,
         isSet(4) ? std::stoull(tokens[4]) : 1LL,
-        isSet(5) ? absl::StrSplit(tokens[5], absl::ByChar(','))
-                 : std::set<std::string>{},
-        isSet(6) ? absl::StrSplit(tokens[6], absl::ByChar(','))
-                 : std::set<std::string>{},
+        isSet(5)
+            ? absl::StrSplit(tokens[5], absl::ByChar(','), absl::SkipEmpty())
+            : std::set<std::string>{},
+        isSet(6)
+            ? absl::StrSplit(tokens[6], absl::ByChar(','), absl::SkipEmpty())
+            : std::set<std::string>{},
         isSet(7) ? tokens[7] : "");
   }
 }
diff --git a/third_party/nix/src/libstore/nar-info-disk-cache.cc b/third_party/nix/src/libstore/nar-info-disk-cache.cc
index a09ed3c0b6..b284fc698d 100644
--- a/third_party/nix/src/libstore/nar-info-disk-cache.cc
+++ b/third_party/nix/src/libstore/nar-info-disk-cache.cc
@@ -232,14 +232,15 @@ class NarInfoDiskCacheImpl final : public NarInfoDiskCache {
           auto hash_ = Hash::deserialize(queryNAR.getStr(6));
           narInfo->narHash = Hash::unwrap_throw(hash_);
           narInfo->narSize = queryNAR.getInt(7);
-          for (auto r : absl::StrSplit(queryNAR.getStr(8), absl::ByChar(' '))) {
+          for (auto r : absl::StrSplit(queryNAR.getStr(8), absl::ByChar(' '),
+                                       absl::SkipEmpty())) {
             narInfo->references.insert(absl::StrCat(cache.storeDir, "/", r));
           }
           if (!queryNAR.isNull(9)) {
             narInfo->deriver = cache.storeDir + "/" + queryNAR.getStr(9);
           }
-          for (auto& sig :
-               absl::StrSplit(queryNAR.getStr(10), absl::ByChar(' '))) {
+          for (auto& sig : absl::StrSplit(
+                   queryNAR.getStr(10), absl::ByChar(' '), absl::SkipEmpty())) {
             narInfo->sigs.insert(std::string(sig));
           }
           narInfo->ca = queryNAR.getStr(11);
diff --git a/third_party/nix/src/libstore/nar-info.cc b/third_party/nix/src/libstore/nar-info.cc
index ec9f882f4f..d42167dbfa 100644
--- a/third_party/nix/src/libstore/nar-info.cc
+++ b/third_party/nix/src/libstore/nar-info.cc
@@ -62,7 +62,8 @@ NarInfo::NarInfo(const Store& store, const std::string& s,
         corrupt();
       }
     } else if (name == "References") {
-      std::vector<std::string> refs = absl::StrSplit(value, absl::ByChar(' '));
+      std::vector<std::string> refs =
+          absl::StrSplit(value, absl::ByChar(' '), absl::SkipEmpty());
       if (!references.empty()) {
         corrupt();
       }
diff --git a/third_party/nix/src/libstore/parsed-derivations.cc b/third_party/nix/src/libstore/parsed-derivations.cc
index 9ee93b6a6d..6989a21fee 100644
--- a/third_party/nix/src/libstore/parsed-derivations.cc
+++ b/third_party/nix/src/libstore/parsed-derivations.cc
@@ -88,7 +88,8 @@ std::optional<Strings> ParsedDerivation::getStringsAttr(
     if (i == drv.env.end()) {
       return {};
     }
-    return absl::StrSplit(i->second, absl::ByAnyChar(" \t\n\r"));
+    return absl::StrSplit(i->second, absl::ByAnyChar(" \t\n\r"),
+                          absl::SkipEmpty());
   }
 }
 
diff --git a/third_party/nix/src/libstore/ssh.cc b/third_party/nix/src/libstore/ssh.cc
index e84944c4c9..8f27f5eb22 100644
--- a/third_party/nix/src/libstore/ssh.cc
+++ b/third_party/nix/src/libstore/ssh.cc
@@ -22,7 +22,8 @@ SSHMaster::SSHMaster(const std::string& host, std::string keyFile,
 
 void SSHMaster::addCommonSSHOpts(Strings& args) {
   for (auto& i :
-       absl::StrSplit(getEnv("NIX_SSHOPTS"), absl::ByAnyChar(" \t\n\r"))) {
+       absl::StrSplit(getEnv("NIX_SSHOPTS"), absl::ByAnyChar(" \t\n\r"),
+                      absl::SkipEmpty())) {
     args.push_back(std::string(i));
   }
   if (!keyFile.empty()) {
diff --git a/third_party/nix/src/libstore/store-api.cc b/third_party/nix/src/libstore/store-api.cc
index ab71282272..4f4083f64f 100644
--- a/third_party/nix/src/libstore/store-api.cc
+++ b/third_party/nix/src/libstore/store-api.cc
@@ -960,7 +960,8 @@ std::pair<std::string, Store::Params> splitUriAndParams(
   Store::Params params;
   auto q = uri.find('?');
   if (q != std::string::npos) {
-    Strings parts = absl::StrSplit(uri.substr(q + 1), absl::ByChar('&'));
+    Strings parts =
+        absl::StrSplit(uri.substr(q + 1), absl::ByChar('&'), absl::SkipEmpty());
     for (const auto& s : parts) {
       auto e = s.find('=');
       if (e != std::string::npos) {