Source sweep: Use cmStrCat for string concatenation

This patch is generated by a python script that uses regular expressions to
search for string concatenation patterns of the kind

```
std::string str = <ARG0>;
str += <ARG1>;
str += <ARG2>;
...
```

and replaces them with a single `cmStrCat` call

```
std::string str = cmStrCat(<ARG0>, <ARG1>, <ARG2>, ...);
```

If any `<ARGX>` is itself a concatenated string of the kind

```
a + b + c + ...;
```

then `<ARGX>` is split into multiple arguments for the `cmStrCat` call.

If there's a sequence of literals in the `<ARGX>`, then all literals in the
sequence are concatenated and merged into a single literal argument for
the `cmStrCat` call.

Single character strings are converted to single char arguments for
the `cmStrCat` call.

`std::to_string(...)` wrappings are removed from `cmStrCat` arguments,
because it supports numeric types as well as string types.

`arg.substr(x)` arguments to `cmStrCat` are replaced with
`cm::string_view(arg).substr(x)`

1 files changed, 9 insertions, 14 deletions

diff --git a/Source/CPack/cmCPackProductBuildGenerator.cxx b/Source/CPack/cmCPackProductBuildGenerator.cxx
index 94b5b5f7e7..800af283d0 100644
--- a/Source/CPack/cmCPackProductBuildGenerator.cxx
+++ b/Source/CPack/cmCPackProductBuildGenerator.cxx
@@ -10,6 +10,7 @@
 #include "cmCPackLog.h"
 #include "cmDuration.h"
 #include "cmGeneratedFileStream.h"
+#include "cmStringAlgorithms.h"
 #include "cmSystemTools.h"
 
 cmCPackProductBuildGenerator::cmCPackProductBuildGenerator()
@@ -28,8 +29,8 @@ int cmCPackProductBuildGenerator::PackageFiles()
     this->GetOption("CPACK_TEMPORARY_DIRECTORY");
 
   // Create the directory where component packages will be built.
-  std::string basePackageDir = packageDirFileName;
-  basePackageDir += "/Contents/Packages";
+  std::string basePackageDir =
+    cmStrCat(packageDirFileName, "/Contents/Packages");
   if (!cmsys::SystemTools::MakeDirectory(basePackageDir.c_str())) {
     cmCPackLogger(cmCPackLog::LOG_ERROR,
                   "Problem creating component packages directory: "
@@ -41,9 +42,7 @@ int cmCPackProductBuildGenerator::PackageFiles()
     std::map<std::string, cmCPackComponent>::iterator compIt;
     for (compIt = this->Components.begin(); compIt != this->Components.end();
          ++compIt) {
-      std::string packageDir = toplevel;
-      packageDir += '/';
-      packageDir += compIt->first;
+      std::string packageDir = cmStrCat(toplevel, '/', compIt->first);
       if (!this->GenerateComponentPackage(basePackageDir,
                                           GetPackageName(compIt->second),
                                           packageDir, &compIt->second)) {
@@ -138,8 +137,8 @@ int cmCPackProductBuildGenerator::InitializeInternal()
 
 bool cmCPackProductBuildGenerator::RunProductBuild(const std::string& command)
 {
-  std::string tmpFile = this->GetOption("CPACK_TOPLEVEL_DIRECTORY");
-  tmpFile += "/ProductBuildOutput.log";
+  std::string tmpFile = cmStrCat(this->GetOption("CPACK_TOPLEVEL_DIRECTORY"),
+                                 "/ProductBuildOutput.log");
 
   cmCPackLogger(cmCPackLog::LOG_VERBOSE, "Execute: " << command << std::endl);
   std::string output;
@@ -166,9 +165,7 @@ bool cmCPackProductBuildGenerator::GenerateComponentPackage(
   const std::string& packageFileDir, const std::string& packageFileName,
   const std::string& packageDir, const cmCPackComponent* component)
 {
-  std::string packageFile = packageFileDir;
-  packageFile += '/';
-  packageFile += packageFileName;
+  std::string packageFile = cmStrCat(packageFileDir, '/', packageFileName);
 
   cmCPackLogger(cmCPackLog::LOG_OUTPUT,
                 "-   Building component package: " << packageFile
@@ -206,10 +203,8 @@ bool cmCPackProductBuildGenerator::GenerateComponentPackage(
   // The command that will be used to run ProductBuild
   std::ostringstream pkgCmd;
 
-  std::string pkgId = "com.";
-  pkgId += this->GetOption("CPACK_PACKAGE_VENDOR");
-  pkgId += '.';
-  pkgId += this->GetOption("CPACK_PACKAGE_NAME");
+  std::string pkgId = cmStrCat("com.", this->GetOption("CPACK_PACKAGE_VENDOR"),
+                               '.', this->GetOption("CPACK_PACKAGE_NAME"));
   if (component) {
     pkgId += '.';
     pkgId += component->Name;