ConfigureLog: Version individual events instead of the whole log

In order to support multiple log versions without buffering the
entire log, move versioning to the level of individual events.
Multiple versions of an event may then be logged consecutively.

Issue: #23200

1 files changed, 24 insertions, 20 deletions

diff --git a/Source/cmTryRunCommand.cxx b/Source/cmTryRunCommand.cxx
index 794f2c6..63e4478 100644
--- a/Source/cmTryRunCommand.cxx
+++ b/Source/cmTryRunCommand.cxx
@@ -40,28 +40,32 @@ void WriteTryRunEvent(cmConfigureLog& log, cmMakefile const& mf,
                       cmTryCompileResult const& compileResult,
                       cmTryRunResult const& runResult)
 {
-  log.BeginEvent("try_run");
-  log.WriteBacktrace(mf);
-  cmCoreTryCompile::WriteTryCompileEventFields(log, compileResult);
-
-  log.BeginObject("runResult"_s);
-  log.WriteValue("variable"_s, runResult.Variable);
-  log.WriteValue("cached"_s, runResult.VariableCached);
-  if (runResult.Stdout) {
-    log.WriteLiteralTextBlock("stdout"_s, *runResult.Stdout);
-  }
-  if (runResult.Stderr) {
-    log.WriteLiteralTextBlock("stderr"_s, *runResult.Stderr);
-  }
-  if (runResult.ExitCode) {
-    try {
-      log.WriteValue("exitCode"_s, std::stoi(*runResult.ExitCode));
-    } catch (std::invalid_argument const&) {
-      log.WriteValue("exitCode"_s, *runResult.ExitCode);
+  static const std::vector<unsigned long> LogVersionsWithTryRunV1{ 1 };
+
+  if (log.IsAnyLogVersionEnabled(LogVersionsWithTryRunV1)) {
+    log.BeginEvent("try_run-v1");
+    log.WriteBacktrace(mf);
+    cmCoreTryCompile::WriteTryCompileEventFields(log, compileResult);
+
+    log.BeginObject("runResult"_s);
+    log.WriteValue("variable"_s, runResult.Variable);
+    log.WriteValue("cached"_s, runResult.VariableCached);
+    if (runResult.Stdout) {
+      log.WriteLiteralTextBlock("stdout"_s, *runResult.Stdout);
+    }
+    if (runResult.Stderr) {
+      log.WriteLiteralTextBlock("stderr"_s, *runResult.Stderr);
+    }
+    if (runResult.ExitCode) {
+      try {
+        log.WriteValue("exitCode"_s, std::stoi(*runResult.ExitCode));
+      } catch (std::invalid_argument const&) {
+        log.WriteValue("exitCode"_s, *runResult.ExitCode);
+      }
     }
+    log.EndObject();
+    log.EndEvent();
   }
-  log.EndObject();
-  log.EndEvent();
 }
 #endif