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#!/bin/sh
refname="$1"
oldrev="$2"
newrev="$3"
zero=$(guix environment --ad-hoc git -- git hash-object --stdin </dev/null | tr '[0-9a-f]' '0')
span="^$oldrev $newrev"
if test "x$oldrev" = "x$zero"
then
>&2 echo "Creating a new branch, $refname..."
span="$newrev"
fi
if test "x$newrev" = "x$zero"
then
>&2 echo "Deleting a branch, that's OK."
exit 0
fi
if test "x$refname" = "xrefs/notes/dist"
then
>&2 echo "Error: the server does not accept dist notes."
exit 1
fi
>&2 echo "Checking all refs in range $span."
for ref in $(guix environment --ad-hoc git -- git rev-list $span)
do
# If there is not already a note on the refs/notes/dist ref, then we
# should run the CI.
>&2 echo "Checking new commit $ref."
if git notes --ref="refs/notes/dist" list "$ref"
then
>&2 echo "CI already ran for $ref, skipping."
else
>&2 echo "This commit has not seen CI yet."
CLONEREPO=$(mktemp -d 2>/dev/null || mktemp -d -t "clone")
REPO=$(pwd)
cd "$CLONEREPO"
guix environment --ad-hoc --pure git -- git clone "$REPO" .
guix environment --ad-hoc --container git -- git checkout "$ref"
guix environment --ad-hoc --container git -- git checkout-index -a -f --prefix=source/
if OUTCOME=$(guix build -c 4 -L guix -f ci.scm)
then
cd $REPO
export BLOB="$(git hash-object -w $OUTCOME/*.tar.gz)"
>&2 echo "Adding blob $BLOB as the results of the CI."
guix environment --ad-hoc --container git -- git notes --ref=refs/notes/dist add \
--allow-empty -f -C "$BLOB" "$ref"
rm -rf $CLONEREPO
else
cd $REPO
rm -rf $CLONEREPO
exit 1
fi
fi
done
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