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, 14 insertions, 6 deletions

diff --git a/lldb/source/Interpreter/OptionValueFileSpecLIst.cpp b/lldb/source/Interpreter/OptionValueFileSpecLIst.cpp
index 7fdc3c78023..94dc9b61949 100644
--- a/lldb/source/Interpreter/OptionValueFileSpecLIst.cpp
+++ b/lldb/source/Interpreter/OptionValueFileSpecLIst.cpp
@@ -25,16 +25,24 @@ void OptionValueFileSpecList::DumpValue(const ExecutionContext *exe_ctx,
   if (dump_mask & eDumpOptionType)
     strm.Printf("(%s)", GetTypeAsCString());
   if (dump_mask & eDumpOptionValue) {
-    if (dump_mask & eDumpOptionType)
-      strm.Printf(" =%s", m_current_value.GetSize() > 0 ? "\n" : "");
-    strm.IndentMore();
+    const bool one_line = dump_mask & eDumpOptionCommand;
     const uint32_t size = m_current_value.GetSize();
+    if (dump_mask & eDumpOptionType)
+      strm.Printf(" =%s",
+                  (m_current_value.GetSize() > 0 && !one_line) ? "\n" : "");
+    if (!one_line)
+      strm.IndentMore();
     for (uint32_t i = 0; i < size; ++i) {
-      strm.Indent();
-      strm.Printf("[%u]: ", i);
+      if (!one_line) {
+        strm.Indent();
+        strm.Printf("[%u]: ", i);
+      }
       m_current_value.GetFileSpecAtIndex(i).Dump(&strm);
+      if (one_line)
+        strm << ' ';
     }
-    strm.IndentLess();
+    if (!one_line)
+      strm.IndentLess();
   }
 }