From 898dfea8a15bc1b06a0e0f16c601aa7e6e3b4fb8 Mon Sep 17 00:00:00 2001
From: Marc <marc.esquerra@ynap.com>
Date: Thu, 15 Mar 2018 20:37:27 +0000
Subject: [PATCH] racer-go-definition forces readonly on files external to the
 project

---
 rc/extra/racer.kak | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/rc/extra/racer.kak b/rc/extra/racer.kak
index 8ca9eafc..6e2b07b5 100644
--- a/rc/extra/racer.kak
+++ b/rc/extra/racer.kak
@@ -104,13 +104,20 @@ define-command racer-go-definition -docstring "Jump to where the rust identifier
         dir=${kak_opt_racer_tmp_dir}
         cursor="${kak_cursor_line} $((${kak_cursor_column} - 1))"
         racer_data=$(racer --interface tab-text  find-definition ${cursor} "${kak_buffile}" "${dir}/buf" | head -n 1)
+
         racer_match=$(printf %s\\n "$racer_data" | cut -f1 )
         if [ "$racer_match" = "MATCH" ]; then
           racer_line=$(printf %s\\n "$racer_data" | cut -f3 )
           racer_column=$(printf %s\\n "$racer_data" | cut -f4 )
           racer_file=$(printf %s\\n "$racer_data" | cut -f5 )
           printf %s\\n "edit -existing '$racer_file' $racer_line $racer_column"
-          #printf %s\\n "set-option buffer readonly true"
+          if [[ "$racer_file" == ${RUST_SRC_PATH}* ]]; then
+            printf %s\\n "set-option buffer readonly true" # The definition resides on the standard library, and the new buffer should be readonly
+          else
+            if [[ "$racer_file" == ${HOME}/.cargo/registry/src* ]]; then
+              printf %s\\n "set-option buffer readonly true" # The definition resides on an external crate, and the new buffer should be readonly
+            fi
+          fi
         else
           printf %s\\n "echo -debug 'racer could not find a definition'"
         fi
@@ -126,12 +133,13 @@ define-command racer-show-doc -docstring "Show the documentation about the rust
     %sh{
         dir=${kak_opt_racer_tmp_dir}
         cursor="${kak_cursor_line} ${kak_cursor_column}"
-        racer_data=$(racer --interface tab-text  complete-with-snippet  ${cursor} "${kak_buffile}" "${dir}/buf" | head -n 2 | tail -n 1)
+        racer_data=$(racer --interface tab-text  complete-with-snippet  ${cursor} "${kak_buffile}" "${dir}/buf" | sed -n 2p )
         racer_match=$(printf %s\\n "$racer_data" | cut -f1)
         if [ "$racer_match" = "MATCH" ]; then
           racer_doc=$(printf %s\\n "$racer_data" | cut -f9 )
-          racer_doc=$(printf %s\\n "$racer_doc" | sed -e 's/^"\(.*\)"$/\1/g')
-          racer_doc=$(printf %s\\n "$racer_doc" | sed -e "s/@/\\\\@/g")
+          racer_doc=$(printf %s\\n "$racer_doc" |
+            sed -e 's/^"\(.*\)"$/\1/g' | # Remove leading and trailing quotes
+            sed -e "s/@/\\\\@/g")        # Escape all @ so that it can be properly used in the string expansion
           printf "info %%@$racer_doc@"
         else
           printf %s\\n "echo -debug 'racer could not find a definition'"