From 11c3127e38dafdf95ca71a85b1591a29b67e0c09 Mon Sep 17 00:00:00 2001
From: Artturin <Artturin@artturin.com>
Date: Sat, 10 Dec 2022 01:09:40 +0200
Subject: stdenv: detect the type of variable in {prepend,append}ToVar

stdenv: error if using {prepend,append}ToVar on associative array

i don't know how to prepend to associative array
---
 pkgs/test/stdenv/default.nix | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

(limited to 'pkgs/test/stdenv')

diff --git a/pkgs/test/stdenv/default.nix b/pkgs/test/stdenv/default.nix
index c5af468655f..08e8eed118f 100644
--- a/pkgs/test/stdenv/default.nix
+++ b/pkgs/test/stdenv/default.nix
@@ -60,10 +60,6 @@ let
         };
 
         passAsFile = [ "buildCommand" ] ++ lib.optionals (extraAttrs ? extraTest) [ "extraTest" ];
-        # FIXME: with structuredAttrs string is converted to a indexed array
-        # should a/pToVar check if the passed variable is a array or a string?
-        # declare -x string="testing-string"
-        # declare -ax string=([0]="world" [1]="testing-string" [2]="hello")
         buildCommand = ''
           declare -p string
           appendToVar string hello
@@ -71,8 +67,23 @@ let
           prependToVar string "world"
           declare -p string
 
+          declare -A associativeArray=(["X"]="Y")
+          [[ $(appendToVar associativeArray "fail" 2>&1) =~ "trying to use" ]] || (echo "prependToVar did not catch prepending associativeArray" && false)
+          [[ $(prependToVar associativeArray "fail" 2>&1) =~ "trying to use" ]] || (echo "prependToVar did not catch prepending associativeArray" && false)
+
           [[ $string == "world testing-string hello" ]] || (echo "'\$string' was not 'world testing-string hello'" && false)
 
+          # test appending to a unset variable
+          appendToVar nonExistant created hello
+          typeset -p nonExistant
+          if [[ -n $__structuredAttrs ]]; then
+            [[ "''${nonExistant[@]}" == "created hello" ]]
+          else
+            # there's a extra " " in front here and a extra " " in the end of prependToVar
+            # shouldn't matter because these functions will mostly be used for $*Flags and the Flag variable will in most cases already exit
+            [[ "$nonExistant" == " created hello" ]]
+          fi
+
           eval "$extraTest"
 
           touch $out
-- 
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