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git fetcher: Add exportIgnore parameter

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Enabled for fetchGit, which historically had this behavior,
among other behaviors we do not want in fetchGit.

fetchTree disables this parameter by default. It can choose the
simpler behavior, as it is still experimental.

I am not confident that the filtering implementation is future
proof. It should reuse a source filtering wrapper, which I believe
Eelco has already written, but not merged yet.
This commit is contained in:
Robert Hensing 2023-11-27 22:34:41 +01:00
parent 4d0ecda33e
commit ce6d58a97c
5 changed files with 81 additions and 14 deletions
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5
tests/functional/fetchGit.sh
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@ -231,12 +231,15 @@ unset _NIX_FORCE_HTTP
# Ensure .gitattributes is respected
touch $repo/not-exported-file
touch $repo/exported-wonky
echo "/not-exported-file export-ignore" >> $repo/.gitattributes
git -C $repo add not-exported-file .gitattributes
echo "/exported-wonky export-ignore=wonk" >> $repo/.gitattributes
git -C $repo add not-exported-file exported-wonky .gitattributes
git -C $repo commit -m 'Bla6'
rev5=$(git -C $repo rev-parse HEAD)
path12=$(nix eval --impure --raw --expr "(builtins.fetchGit { url = file://$repo; rev = \"$rev5\"; }).outPath")
[[ ! -e $path12/not-exported-file ]]
[[ -e $path12/exported-wonky ]]
# should fail if there is no repo
rm -rf $repo/.git