nix-super/tests/fallback.sh

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source common.sh
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clearStore
drvPath=$(nix-instantiate simple.nix)
echo "derivation is $drvPath"
outPath=$(nix-store -q --fallback "$drvPath")
echo "output path is $outPath"
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# Build with a substitute that fails. This should fail.
export NIX_SUBSTITUTERS=$(pwd)/substituter2.sh
if nix-store -r "$drvPath"; then echo unexpected fallback; exit 1; fi
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# Build with a substitute that fails. This should fall back to a source build.
export NIX_SUBSTITUTERS=$(pwd)/substituter2.sh
nix-store -r --fallback "$drvPath"
text=$(cat "$outPath"/hello)
if test "$text" != "Hello World!"; then exit 1; fi