fix(3p/nix): apply all clang-tidy fixes r/1495

Change-Id: I265e763393422ee1881653527c91024458060825
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1432
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

4 files changed, 55 insertions, 36 deletions

diff --git a/third_party/nix/src/libexpr/primops/context.cc b/third_party/nix/src/libexpr/primops/context.cc
index 841a45c61c03..fb8879ead16d 100644
--- a/third_party/nix/src/libexpr/primops/context.cc
+++ b/third_party/nix/src/libexpr/primops/context.cc
@@ -97,12 +97,13 @@ static void prim_getContext(EvalState& state, const Pos& pos, Value** args,
           ContextInfo{isPath, isAllOutputs,
                       output.empty() ? Strings{} : Strings{std::move(output)}});
     } else {
-      if (isPath)
+      if (isPath) {
         iter->second.path = true;
-      else if (isAllOutputs)
+      } else if (isAllOutputs) {
         iter->second.allOutputs = true;
-      else
+      } else {
         iter->second.outputs.emplace_back(std::move(output));
+      }
     }
   }
 
@@ -116,8 +117,9 @@ static void prim_getContext(EvalState& state, const Pos& pos, Value** args,
     if (info.second.path) {
       mkBool(*state.allocAttr(infoVal, sPath), true);
     }
-    if (info.second.allOutputs)
+    if (info.second.allOutputs) {
       mkBool(*state.allocAttr(infoVal, sAllOutputs), true);
+    }
     if (!info.second.outputs.empty()) {
       auto& outputsVal = *state.allocAttr(infoVal, state.sOutputs);
       state.mkList(outputsVal, info.second.outputs.size());
@@ -147,9 +149,10 @@ static void prim_appendContext(EvalState& state, const Pos& pos, Value** args,
   auto sAllOutputs = state.symbols.Create("allOutputs");
   for (const auto& attr_iter : *args[1]->attrs) {
     const Attr* i = &attr_iter.second;  // TODO(tazjin): get rid of this
-    if (!state.store->isStorePath(i->name))
+    if (!state.store->isStorePath(i->name)) {
       throw EvalError("Context key '%s' is not a store path, at %s", i->name,
                       i->pos);
+    }
     if (!settings.readOnlyMode) {
       state.store->ensurePath(i->name);
     }
diff --git a/third_party/nix/src/libexpr/primops/fetchGit.cc b/third_party/nix/src/libexpr/primops/fetchGit.cc
index 7262a291559f..839094b72b53 100644
--- a/third_party/nix/src/libexpr/primops/fetchGit.cc
+++ b/third_party/nix/src/libexpr/primops/fetchGit.cc
@@ -30,8 +30,9 @@ std::regex revRegex("^[0-9a-fA-F]{40}$");
 GitInfo exportGit(ref<Store> store, const std::string& uri,
                   std::optional<std::string> ref, std::string rev,
                   const std::string& name) {
-  if (evalSettings.pureEval && rev == "")
+  if (evalSettings.pureEval && rev == "") {
     throw Error("in pure evaluation mode, 'fetchGit' requires a Git revision");
+  }
 
   if (!ref && rev == "" && absl::StartsWith(uri, "/") &&
       pathExists(uri + "/.git")) {
@@ -90,8 +91,9 @@ GitInfo exportGit(ref<Store> store, const std::string& uri,
     ref = "HEAD"s;
   }
 
-  if (rev != "" && !std::regex_match(rev, revRegex))
+  if (rev != "" && !std::regex_match(rev, revRegex)) {
     throw Error("invalid Git revision '%s'", rev);
+  }
 
   deletePath(getCacheDir() + "/nix/git");
 
@@ -104,12 +106,13 @@ GitInfo exportGit(ref<Store> store, const std::string& uri,
   }
 
   Path localRefFile;
-  if (ref->compare(0, 5, "refs/") == 0)
+  if (ref->compare(0, 5, "refs/") == 0) {
     localRefFile = cacheDir + "/" + *ref;
-  else
+  } else {
     localRefFile = cacheDir + "/refs/heads/" + *ref;
+  }
 
-  bool doFetch;
+  bool doFetch = 0;
   time_t now = time(0);
   /* If a rev was specified, we need to fetch if it's not in the
      repo. */
@@ -127,9 +130,10 @@ GitInfo exportGit(ref<Store> store, const std::string& uri,
   } else {
     /* If the local ref is older than ‘tarball-ttl’ seconds, do a
        git fetch to update the local ref to the remote ref. */
-    struct stat st;
+    struct stat st {};
     doFetch = stat(localRefFile.c_str(), &st) != 0 ||
-              (uint64_t)st.st_mtime + settings.tarballTtl <= (uint64_t)now;
+              static_cast<uint64_t>(st.st_mtime) + settings.tarballTtl <=
+                  static_cast<uint64_t>(now);
   }
   if (doFetch) {
     DLOG(INFO) << "fetching Git repository '" << uri << "'";
@@ -225,22 +229,24 @@ static void prim_fetchGit(EvalState& state, const Pos& pos, Value** args,
     for (auto& attr_iter : *args[0]->attrs) {
       auto& attr = attr_iter.second;
       std::string n(attr.name);
-      if (n == "url")
+      if (n == "url") {
         url =
             state.coerceToString(*attr.pos, *attr.value, context, false, false);
-      else if (n == "ref")
+      } else if (n == "ref") {
         ref = state.forceStringNoCtx(*attr.value, *attr.pos);
-      else if (n == "rev")
+      } else if (n == "rev") {
         rev = state.forceStringNoCtx(*attr.value, *attr.pos);
-      else if (n == "name")
+      } else if (n == "name") {
         name = state.forceStringNoCtx(*attr.value, *attr.pos);
-      else
+      } else {
         throw EvalError("unsupported argument '%s' to 'fetchGit', at %s",
                         attr.name, *attr.pos);
+      }
     }
 
-    if (url.empty())
+    if (url.empty()) {
       throw EvalError(format("'url' argument required, at %1%") % pos);
+    }
 
   } else {
     url = state.coerceToString(pos, *args[0], context, false, false);
diff --git a/third_party/nix/src/libexpr/primops/fetchMercurial.cc b/third_party/nix/src/libexpr/primops/fetchMercurial.cc
index 3ece094e6a8d..05a3d66ae7ca 100644
--- a/third_party/nix/src/libexpr/primops/fetchMercurial.cc
+++ b/third_party/nix/src/libexpr/primops/fetchMercurial.cc
@@ -28,10 +28,11 @@ std::regex commitHashRegex("^[0-9a-fA-F]{40}$");
 
 HgInfo exportMercurial(ref<Store> store, const std::string& uri,
                        std::string rev, const std::string& name) {
-  if (evalSettings.pureEval && rev == "")
+  if (evalSettings.pureEval && rev == "") {
     throw Error(
         "in pure evaluation mode, 'fetchMercurial' requires a Mercurial "
         "revision");
+  }
 
   if (rev == "" && absl::StartsWith(uri, "/") && pathExists(uri + "/.hg")) {
     bool clean = runProgram("hg", true,
@@ -90,9 +91,10 @@ HgInfo exportMercurial(ref<Store> store, const std::string& uri,
   /* If we haven't pulled this repo less than ‘tarball-ttl’ seconds,
      do so now. */
   time_t now = time(0);
-  struct stat st;
+  struct stat st {};
   if (stat(stampFile.c_str(), &st) != 0 ||
-      (uint64_t)st.st_mtime + settings.tarballTtl <= (uint64_t)now) {
+      static_cast<uint64_t>(st.st_mtime) + settings.tarballTtl <=
+          static_cast<uint64_t>(now)) {
     /* Except that if this is a commit hash that we already have,
        we don't have to pull again. */
     if (!(std::regex_match(rev, commitHashRegex) && pathExists(cacheDir) &&
@@ -198,20 +200,22 @@ static void prim_fetchMercurial(EvalState& state, const Pos& pos, Value** args,
     for (auto& attr_iter : *args[0]->attrs) {
       auto& attr = attr_iter.second;
       std::string n(attr.name);
-      if (n == "url")
+      if (n == "url") {
         url =
             state.coerceToString(*attr.pos, *attr.value, context, false, false);
-      else if (n == "rev")
+      } else if (n == "rev") {
         rev = state.forceStringNoCtx(*attr.value, *attr.pos);
-      else if (n == "name")
+      } else if (n == "name") {
         name = state.forceStringNoCtx(*attr.value, *attr.pos);
-      else
+      } else {
         throw EvalError("unsupported argument '%s' to 'fetchMercurial', at %s",
                         attr.name, *attr.pos);
+      }
     }
 
-    if (url.empty())
+    if (url.empty()) {
       throw EvalError(format("'url' argument required, at %1%") % pos);
+    }
 
   } else {
     url = state.coerceToString(pos, *args[0], context, false, false);
diff --git a/third_party/nix/src/libexpr/primops/fromTOML.cc b/third_party/nix/src/libexpr/primops/fromTOML.cc
index 389ac080677a..e3d2a4940769 100644
--- a/third_party/nix/src/libexpr/primops/fromTOML.cc
+++ b/third_party/nix/src/libexpr/primops/fromTOML.cc
@@ -30,10 +30,12 @@ static void prim_fromTOML(EvalState& state, const Pos& pos, Value** args,
         if (auto i2 = i.second->as_table_array()) {
           size_t size2 = i2->get().size();
           state.mkList(v2, size2);
-          for (size_t j = 0; j < size2; ++j)
+          for (size_t j = 0; j < size2; ++j) {
             visit(*((*v2.list)[j] = state.allocValue()), i2->get()[j]);
-        } else
+          }
+        } else {
           visit(v2, i.second);
+        }
       }
     }
 
@@ -42,8 +44,9 @@ static void prim_fromTOML(EvalState& state, const Pos& pos, Value** args,
 
       state.mkList(v, size);
 
-      for (size_t i = 0; i < size; ++i)
+      for (size_t i = 0; i < size; ++i) {
         visit(*((*v.list)[i] = state.allocValue()), t2->get()[i]);
+      }
     }
 
     // Handle cases like 'a = [[{ a = true }]]', which IMHO should be
@@ -55,25 +58,28 @@ static void prim_fromTOML(EvalState& state, const Pos& pos, Value** args,
 
       state.mkList(v, size);
 
-      for (size_t j = 0; j < size; ++j)
+      for (size_t j = 0; j < size; ++j) {
         visit(*((*v.list)[j] = state.allocValue()), t2->get()[j]);
+      }
     }
 
     else if (t->is_value()) {
-      if (auto val = t->as<int64_t>())
+      if (auto val = t->as<int64_t>()) {
         mkInt(v, val->get());
-      else if (auto val = t->as<NixFloat>())
+      } else if (auto val = t->as<NixFloat>()) {
         mkFloat(v, val->get());
-      else if (auto val = t->as<bool>())
+      } else if (auto val = t->as<bool>()) {
         mkBool(v, val->get());
-      else if (auto val = t->as<std::string>())
+      } else if (auto val = t->as<std::string>()) {
         mkString(v, val->get());
-      else
+      } else {
         throw EvalError("unsupported value type in TOML");
+      }
     }
 
-    else
+    else {
       abort();
+    }
   };
 
   try {