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bug#35776: Test guix-pack-localstatedir.sh and guix-pack-relocatable.sh

From: Ludovic Courtès
Subject: bug#35776: Test guix-pack-localstatedir.sh and guix-pack-relocatable.sh crash when /gnu/store doesn't exist
Date: Sat, 18 May 2019 12:29:18 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux)

Ting-Wei Lan <address@hidden> skribis:

> It seems to me that the reason is that NIX_STORE_DIR is exported by
> test-env script, so the line
> NIX_STORE_DIR="`guile -c '(use-modules (guix config))(display %storedir)'`"
> not only changes the value of shell variable NIX_STORE_DIR but also
> exports it to the environment.
> Therefore, the next line
> localstatedir="`guile -c '(use-modules (guix config))(display
> %localstatedir)'`"
> crashes at guix/config.scm when running the code
> (define %store-directory
>   (or (and=> (getenv "NIX_STORE_DIR") canonicalize-path)
>       %storedir))
> because NIX_STORE_DIR points to a non-existent path /gnu/store.
> I attached a patch to avoid the crash by delaying the modification
> to NIX_STORE_DIR, but I am not sure if it is correct to do so.

Indeed.  Pushed as baab87ac49e3f0f873e17eb16db9781189b1f2d1, thanks!


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