Isolate formatted streaming blocks with clang-format off/on

The clang-format tool can do a good job formatting most code, but
well-organized streaming blocks are best left manually formatted.

Find blocks of the form

    os <<
      "...\n"
      "...\n"
      ;

using the command

    $ git ls-files -z -- Source |
      egrep -v -z '^Source/kwsys/' |
      xargs -0 pcregrep -M --color=always -B 1 -A 1 -n \
        '<<[^\n]*\n(^ *("[^\n]*("|<<|;)$|;)\n){2,}'

Find blocks of the form

    os << "...\n"
       << "...\n"
       << "...\n";

using the command

    $ git ls-files -z -- Source |
      egrep -v -z '^Source/kwsys/' |
      xargs -0 pcregrep -M --color=always -B 1 -A 1 -n \
        '<<[^\n]*\n(^ *<<[^\n]*(\\n"|<<|;)$\n){2,}'

Surround such blocks with the pair

    /* clang-format off */
    ...
    /* clang-format on */

in order to protect them from update by clang-format.  Use the C-style
`/*...*/` comments instead of C++-style `//...` comments in order to
prevent them from ever being swallowed by re-formatting of surrounding
comments.

1 files changed, 2 insertions, 0 deletions

diff --git a/Source/cmInstallExportGenerator.cxx b/Source/cmInstallExportGenerator.cxx
index a31c0c979d..0b623c6820 100644
--- a/Source/cmInstallExportGenerator.cxx
+++ b/Source/cmInstallExportGenerator.cxx
@@ -216,6 +216,7 @@ void cmInstallExportGenerator::GenerateScriptActions(std::ostream& os,
   Indent indentN = indent.Next();
   Indent indentNN = indentN.Next();
   Indent indentNNN = indentNN.Next();
+  /* clang-format off */
   os << indentN << "file(DIFFERENT EXPORT_FILE_CHANGED FILES\n"
      << indentN << "     \"" << installedFile << "\"\n"
      << indentN << "     \"" << this->MainImportFile << "\")\n";
@@ -229,6 +230,7 @@ void cmInstallExportGenerator::GenerateScriptActions(std::ostream& os,
   os << indentNN << "endif()\n";
   os << indentN << "endif()\n";
   os << indent << "endif()\n";
+  /* clang-format on */
 
   // Install the main export file.
   std::vector<std::string> files;