From f9f11aa7627761dd52bf12679190184cb807225e Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Fri, 6 Jan 2017 19:43:20 +0000
Subject: [PATCH] Make the currently sourced file path available through
 $kak_source

The :source command sets an 'source' value to the real path of the
file getting sourced while its commands are executed.

Fixes #1112
---
 README.asciidoc                  | 1 +
 doc/manpages/expansions.asciidoc | 3 +++
 src/commands.cc                  | 6 ++++--
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/README.asciidoc b/README.asciidoc
index 3d9d46b8..9136b593 100644
--- a/README.asciidoc
+++ b/README.asciidoc
@@ -776,6 +776,7 @@ Some of Kakoune state is available through environment variables:
  * `kak_reg_<r>`: value of register <r>
  * `kak_session`: name of the current session
  * `kak_client`: name of current client
+ * `kak_source`: path of the file currently getting executed (through the source command)
  * `kak_cursor_line`: line of the end of the main selection
  * `kak_cursor_column`: column of the end of the main selection (in byte)
  * `kak_cursor_char_column`: column of the end of the main selection (in character)
diff --git a/doc/manpages/expansions.asciidoc b/doc/manpages/expansions.asciidoc
index 4d3304b1..fcf9701a 100644
--- a/doc/manpages/expansions.asciidoc
+++ b/doc/manpages/expansions.asciidoc
@@ -84,6 +84,9 @@ informations about Kakoune's state:
 	name of the current session
 *kak_client*::
 	name of current client
+*kak_source*::
+	path of the file currently getting executed (through the source
+	command)
 *kak_cursor_line*::
 	line of the end of the main selection
 *kak_cursor_column*::
diff --git a/src/commands.cc b/src/commands.cc
index 5b5eefcd..62b35c9d 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -1180,10 +1180,12 @@ const CommandDesc source_cmd = {
     filename_completer,
     [](const ParametersParser& parser, Context& context, const ShellContext&)
     {
-        String file_content = read_file(parse_filename(parser[0]), true);
+        String path = real_path(parse_filename(parser[0]));
+        String file_content = read_file(path, true);
         try
         {
-            CommandManager::instance().execute(file_content, context);
+            CommandManager::instance().execute(file_content, context,
+                                               {{}, {{"source", path}}});
         }
         catch (Kakoune::runtime_error& err)
         {