refactor(tvix/libutil): Mark single-argument constructors explicit r/1704

This is the clang-tidy lint 'google-explicit-constructor'.

There's a whole bunch of breakage that was introduced by this, and we
had to opt out a few types of this (esp. the string formatting crap).

In some cases minor other changes have been done to keep the code
working, instead of converting between types (e.g. an explicit
comparison operator implementation for nix::Pid).

Change-Id: I12e1ca51a6bc2c882dba81a2526b9729d26988e7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1832
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Reviewed-by: glittershark <grfn@gws.fyi>

1 files changed, 15 insertions, 15 deletions

diff --git a/third_party/nix/src/libutil/util.cc b/third_party/nix/src/libutil/util.cc
index 67bde4ad4fe6..939b6361d13c 100644
--- a/third_party/nix/src/libutil/util.cc
+++ b/third_party/nix/src/libutil/util.cc
@@ -312,7 +312,7 @@ std::string readFile(int fd) {
 }
 
 std::string readFile(absl::string_view path, bool drain) {
-  AutoCloseFD fd = open(std::string(path).c_str(), O_RDONLY | O_CLOEXEC);
+  AutoCloseFD fd(open(std::string(path).c_str(), O_RDONLY | O_CLOEXEC));
   if (!fd) {
     throw SysError(format("opening file '%1%'") % path);
   }
@@ -321,7 +321,7 @@ std::string readFile(absl::string_view path, bool drain) {
 
 void readFile(absl::string_view path, Sink& sink) {
   // TODO(tazjin): use stdlib functions for this stuff
-  AutoCloseFD fd = open(std::string(path).c_str(), O_RDONLY | O_CLOEXEC);
+  AutoCloseFD fd(open(std::string(path).c_str(), O_RDONLY | O_CLOEXEC));
   if (!fd) {
     throw SysError("opening file '%s'", path);
   }
@@ -329,8 +329,8 @@ void readFile(absl::string_view path, Sink& sink) {
 }
 
 void writeFile(const Path& path, const std::string& s, mode_t mode) {
-  AutoCloseFD fd =
-      open(path.c_str(), O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC, mode);
+  AutoCloseFD fd(
+      open(path.c_str(), O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC, mode));
   if (!fd) {
     throw SysError(format("opening file '%1%'") % path);
   }
@@ -338,8 +338,8 @@ void writeFile(const Path& path, const std::string& s, mode_t mode) {
 }
 
 void writeFile(const Path& path, Source& source, mode_t mode) {
-  AutoCloseFD fd =
-      open(path.c_str(), O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC, mode);
+  AutoCloseFD fd(
+      open(path.c_str(), O_WRONLY | O_TRUNC | O_CREAT | O_CLOEXEC, mode));
   if (!fd) {
     throw SysError(format("opening file '%1%'") % path);
   }
@@ -790,8 +790,8 @@ void Pipe::create() {
   closeOnExec(fds[0]);
   closeOnExec(fds[1]);
 #endif
-  readSide = fds[0];
-  writeSide = fds[1];
+  readSide = AutoCloseFD(fds[0]);
+  writeSide = AutoCloseFD(fds[1]);
 }
 
 //////////////////////////////////////////////////////////////////////
@@ -868,7 +868,7 @@ void killUser(uid_t uid) {
 
   ProcessOptions options;
 
-  Pid pid = startProcess(
+  Pid pid(startProcess(
       [&]() {
         if (setuid(uid) == -1) {
           throw SysError("setting uid");
@@ -888,7 +888,7 @@ void killUser(uid_t uid) {
 
         _exit(0);
       },
-      options);
+      options));
 
   int status = pid.wait();
   if (status != 0) {
@@ -1024,7 +1024,7 @@ void runProgram2(const RunOptions& options) {
   ProcessOptions processOptions;
 
   /* Fork. */
-  Pid pid = startProcess(
+  Pid pid(startProcess(
       [&]() {
         if (options.environment) {
           replaceEnv(*options.environment);
@@ -1070,9 +1070,9 @@ void runProgram2(const RunOptions& options) {
 
         throw SysError("executing '%1%'", options.program);
       },
-      processOptions);
+      processOptions));
 
-  out.writeSide = -1;
+  out.writeSide = AutoCloseFD(-1);
 
   std::thread writerThread;
 
@@ -1085,7 +1085,7 @@ void runProgram2(const RunOptions& options) {
   });
 
   if (source != nullptr) {
-    in.readSide = -1;
+    in.readSide = AutoCloseFD(-1);
     writerThread = std::thread([&]() {
       try {
         std::vector<unsigned char> buf(8 * 1024);
@@ -1102,7 +1102,7 @@ void runProgram2(const RunOptions& options) {
       } catch (...) {
         promise.set_exception(std::current_exception());
       }
-      in.writeSide = -1;
+      in.writeSide = AutoCloseFD(-1);
     });
   }