fetchzip: don't error out if the directory inside the archive starts with a "."

pkgs/build-support/fetchzip/default.nix

@@ -52,12 +52,12 @@ in {
       chmod -R +w "$unpackDir"
     ''
     + (if stripRoot then ''
-      if [ $(ls "$unpackDir" | wc -l) != 1 ]; then
+      if [ $(ls -A "$unpackDir" | wc -l) != 1 ]; then
         echo "error: zip file must contain a single file or directory."
         echo "hint: Pass stripRoot=false; to fetchzip to assume flat list of files."
         exit 1
       fi
-      fn=$(cd "$unpackDir" && echo *)
+      fn=$(cd "$unpackDir" && ls -A)
       if [ -f "$unpackDir/$fn" ]; then
         mkdir $out
       fi

pkgs/build-support/fetchzip/tests.nix

@@ -1,4 +1,4 @@
-{ testers, fetchzip, ... }:
+{ testers, fetchzip, runCommand, ... }:
 
 let
   url = "https://gist.github.com/glandium/01d54cefdb70561b5f6675e08f2990f2/archive/2f430f0c136a69b0886281d0c76708997d8878af.zip";
@@ -12,6 +12,14 @@ in
   postFetch = testers.invalidateFetcherByDrvHash fetchzip {
     inherit url;
     sha256 = "sha256-7sAOzKa+9vYx5XyndHxeY2ffWAjOsgCkXC9anK6cuV0=";
-    postFetch = ''touch $out/filee'';
+    postFetch = "touch $out/filee";
+  };
+
+  hiddenDir = testers.invalidateFetcherByDrvHash fetchzip {
+    url = "file://${runCommand "hiddendir.tar" {} ''
+      mkdir .foo
+      tar -cf $out .foo
+    ''}";
+    sha256 = "sha256-pQpattmS9VmO3ZIQUFn66az8GSmB4IvYhTTCFn6SUmo=";
   };
 }