style(3p/nix): Enforce braces around loops and conditionals r/767

This change was generated with:

  fd -e cc -e hh | xargs -I{} clang-tidy {} -p ~/projects/nix-build/ \
    --checks='-*,readability-braces-around-statements' --fix \
    -fix-errors

Some manual fixes were applied because some convoluted unbraced
statements couldn't be untangled by clang-tidy.

This commit still includes invalid files, but I decided to clean them
up in a subsequent commit so that it becomes more obvious where
clang-tidy failed. Maybe this will allow for a bug-report to
clang-tidy.

1 files changed, 8 insertions, 6 deletions

diff --git a/third_party/nix/src/libexpr/names.cc b/third_party/nix/src/libexpr/names.cc
index 8e198f0925..66a918de5d 100644
--- a/third_party/nix/src/libexpr/names.cc
+++ b/third_party/nix/src/libexpr/names.cc
@@ -57,21 +57,23 @@ static bool componentsLT(const string& c1, const string& c2) {
   int n1, n2;
   bool c1Num = string2Int(c1, n1), c2Num = string2Int(c2, n2);
 
-  if (c1Num && c2Num)
+  if (c1Num && c2Num) {
     return n1 < n2;
-  else if (c1 == "" && c2Num)
+  } else if (c1 == "" && c2Num)
     return true;
   else if (c1 == "pre" && c2 != "pre")
     return true;
   else if (c2 == "pre")
     return false;
   /* Assume that `2.3a' < `2.3.1'. */
-  else if (c2Num)
+  else if (c2Num) {
     return true;
-  else if (c1Num)
+  } else if (c1Num) {
     return false;
-  else
-    return c1 < c2;
+  } else {
+    return
+  }
+  c1 < c2;
 }
 
 int compareVersions(const string& v1, const string& v2) {