From 15df0fc78133059b28545bf0508fbd20c6b02c92 Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Sat, 7 Dec 2019 15:39:54 +1100
Subject: [PATCH] Add -scratch and -file switches to the rename-buffer command

---
 doc/pages/commands.asciidoc |  5 +++--
 src/commands.cc             | 19 +++++++++++++++++--
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/doc/pages/commands.asciidoc b/doc/pages/commands.asciidoc
index a7ee1124..e182696e 100644
--- a/doc/pages/commands.asciidoc
+++ b/doc/pages/commands.asciidoc
@@ -106,8 +106,9 @@ of the file onto the filesystem
     *alias* db +
     delete current buffer or the buffer <name> if specified
 
-*rename-buffer* <name>::
-    set current buffer name
+*rename-buffer* [-file|-scratch] <name>::
+    set current buffer name, if *-scratch* or *-file* is given, ensure
+    the buffer is set to the corresponding type.
 
 *source* <filename> <param>...::
     execute commands in <filename>
diff --git a/src/commands.cc b/src/commands.cc
index b3277ebe..2d5b2d81 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -823,13 +823,28 @@ const CommandDesc rename_buffer_cmd = {
     "rename-buffer",
     nullptr,
     "rename-buffer <name>: change current buffer name",
-    single_param,
+    ParameterDesc{
+        {
+            { "scratch",  { false, "convert a file buffer to a scratch buffer" } },
+            { "file",  { false, "convert a scratch buffer to a file buffer" } }
+        },
+        ParameterDesc::Flags::None, 1, 1
+    },
     CommandFlags::None,
     CommandHelper{},
     filename_completer<false>,
     [](const ParametersParser& parser, Context& context, const ShellContext&)
     {
-        if (not context.buffer().set_name(parser[0]))
+        if (parser.get_switch("scratch") and parser.get_switch("file"))
+            throw runtime_error("scratch and file are incompatible switches");
+
+        auto& buffer = context.buffer();
+        if (parser.get_switch("scratch"))
+            buffer.flags() &= ~(Buffer::Flags::File | Buffer::Flags::New);
+        if (parser.get_switch("file"))
+            buffer.flags() |= Buffer::Flags::File;
+
+        if (not buffer.set_name(parser[0]))
             throw runtime_error(format("unable to change buffer name to '{}': a buffer with this name already exists", parser[0]));
     }
 };