Use sponge to avoid need for temp file

Signed-off-by: Pedro Pombeiro <pombeirp@users.noreply.github.com>

nix/desktop/default.nix

@@ -1,5 +1,5 @@
 { stdenv, pkgs, callPackage, target-os,
-  cmake, extra-cmake-modules, file, status-go, go,
+  cmake, extra-cmake-modules, file, moreutils, status-go, go,
   darwin, nodejs }:
 
 let
@@ -21,6 +21,7 @@ in {
     cmake
     extra-cmake-modules
     file
+    moreutils
     snoreNotifySources
     qtkeychainSources
   ] ++ catAttrs "buildInputs" selectedSources);

scripts/build-desktop.sh

@@ -115,8 +115,8 @@ function compile() {
   # Temporarily add path to javascript bundle to package.json
   local jsBundleLine="\"desktopJSBundlePath\": \"$JS_BUNDLE_PATH\""
   local jsPackagePath=$(joinExistingPath "$STATUS_REACT_HOME" 'desktop/js_files/package.json')
-  local tmp=$(mktemp)
-  jq ".=(. + {$jsBundleLine})" "$jsPackagePath" > "$tmp" && mv "$tmp" "$jsPackagePath"
+
+  jq ".=(. + {$jsBundleLine})" "$jsPackagePath" | sponge "$jsPackagePath"
   echo -e "${YELLOW}Added 'desktopJSBundlePath' line to $jsPackagePath:${NC}"
   echo ""