Add functionality to export settings

For the reproducer feature I need to be able to export and import the
current LLDB configuration. To realize this I've extended the existing
functionality to print settings. With the help of a new formatting
option, we can now write the settings and their values to a file
structured as regular commands.

Concretely the functionality works as follows:

  (lldb) settings export -f /path/to/file

This file contains a bunch of settings set commands, followed by the
setting's name and value.

  ...
  settings set use-external-editor false
  settings set use-color true
  settings set auto-one-line-summaries true
  settings set auto-indent true
  ...

You can import the settings again by either sourcing the file or using
the settings read command.

  (lldb) settings read -f /path/to/file

Differential revision: https://reviews.llvm.org/D52651

llvm-svn: 345346

1 files changed, 3 insertions, 0 deletions

diff --git a/lldb/source/Interpreter/Property.cpp b/lldb/source/Interpreter/Property.cpp
index 369029bc570..2c3e3728a37 100644
--- a/lldb/source/Interpreter/Property.cpp
+++ b/lldb/source/Interpreter/Property.cpp
@@ -233,7 +233,10 @@ void Property::Dump(const ExecutionContext *exe_ctx, Stream &strm,
                     uint32_t dump_mask) const {
   if (m_value_sp) {
     const bool dump_desc = dump_mask & OptionValue::eDumpOptionDescription;
+    const bool dump_cmd = dump_mask & OptionValue::eDumpOptionCommand;
     const bool transparent = m_value_sp->ValueIsTransparent();
+    if (dump_cmd && !transparent)
+      strm << "settings set -f ";
     if (dump_desc || !transparent) {
       if ((dump_mask & OptionValue::eDumpOptionName) && m_name) {
         DumpQualifiedName(strm);