Fix activate.fish

- Re-use old variable names
- Requote to fix param expansion problems
- Use traditional prompt look

Author: Ivoz

virtualenv.py

@@ -2051,21 +2051,19 @@ def convert(s):
 
 ##file activate.fish
 ACTIVATE_FISH = convert("""
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 """)
 
 ##file activate.csh

virtualenv_embedded/activate.fish

@@ -1,31 +1,32 @@
-# This file should be used using `. bin/activate.fish` *within a running fish ( http://fishshell.com ) session*.
+# This file must be used using `. bin/activate.fish` *within a running fish ( http://fishshell.com ) session*.
 # Do not run it directly.
 
 function deactivate -d 'Exit virtualenv mode and return to the normal environment.'
-    if test -n $_VIRTUALENV_OLD_PATH
-        set -gx PATH $_VIRTUALENV_OLD_PATH
-        set -e _VIRTUALENV_OLD_PATH
+    # reset old environment variables
+    if test -n "$_OLD_VIRTUAL_PATH"
+        set -gx PATH $_OLD_VIRTUAL_PATH
+        set -e _OLD_VIRTUAL_PATH
     end
 
-    if test -n $_VIRTUALENV_OLD_PYTHONHOME
-        set -gx PYTHONHOME $_VIRTUALENV_OLD_PYTHONHOME
-        set -e _VIRTUALENV_OLD_PYTHONHOME
+    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
+        set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
+        set -e _OLD_VIRTUAL_PYTHONHOME
     end
 
-    if test -n $_VIRTUALENV_OLD_FISH_PROMPT_OVERRIDE
+    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
         # Set an empty local `$fish_function_path` to allow the removal of `fish_prompt` using `functions -e`.
         set -l fish_function_path
 
         # Erase virtualenv's `fish_prompt` and restore the original.
         functions -e fish_prompt
         functions -c _old_fish_prompt fish_prompt
         functions -e _old_fish_prompt
-        set -e _VIRTUALENV_OLD_FISH_PROMPT_OVERRIDE
+        set -e _OLD_FISH_PROMPT_OVERRIDE
     end
 
     set -e VIRTUAL_ENV
 
-    if test $argv[1] != 'nondestructive'
+    if test "$argv[1]" != 'nondestructive'
         # Self-destruct!
         functions -e deactivate
     end
@@ -36,35 +37,31 @@ deactivate nondestructive
 
 set -gx VIRTUAL_ENV "__VIRTUAL_ENV__"
 
-set -gx _VIRTUALENV_OLD_PATH $PATH
-set -gx PATH $VIRTUAL_ENV/"__BIN_NAME__" $PATH
+set -gx _OLD_VIRTUAL_PATH $PATH
+set -gx PATH "$VIRTUAL_ENV/__BIN_NAME__" $PATH
 
 # Unset `$PYTHONHOME` if set.
 if set -q PYTHONHOME
-    set -gx _VIRTUALENV_OLD_PYTHONHOME $PYTHONHOME
+    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
     set -e PYTHONHOME
 end
 
-if test \( -z $VIRTUAL_ENV_DISABLE_PROMPT \)
+if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
     # Copy the current `fish_prompt` function as `_old_fish_prompt`.
     functions -c fish_prompt _old_fish_prompt
 
     function fish_prompt
-        # Save the current $status, for fish_prompts that display it.
-        set -l old_status $status
 
         # Prompt override provided?
         # If not, just prepend the environment name.
         if test -n "__VIRTUAL_PROMPT__"
             printf '%s%s' "__VIRTUAL_PROMPT__" (set_color normal)
         else
-            printf '%svirtualenv:%s %s%s%s\n' (set_color white) (set_color normal) (set_color -b black white) (basename $VIRTUAL_ENV) (set_color normal)
+            printf '%s(%s%s)%s' (set_color normal) (set_color -b black -o white) (basename "$VIRTUAL_ENV") (set_color normal)
         end
-        
-        # Restore the original $status
-        echo "exit $old_status" | source
+
         _old_fish_prompt
     end
 
-    set -gx _VIRTUALENV_OLD_FISH_PROMPT_OVERRIDE $VIRTUAL_ENV
+    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
 end