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build/bake: use signing config for GHA cache signing #189

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Merged
crazy-max merged 1 commit into from
May 5, 2026
+34 −10
Merged

build/bake: use signing config for GHA cache signing #189

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22 changes: 17 additions & 5 deletions .github/workflows/bake.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -555,21 +555,33 @@ jobs:
set -e

# Create temporary files
out_file=$(mktemp)
in_file=$(mktemp)
trap 'rm -f "$in_file" "$out_file"' EXIT
tmp_dir=$(mktemp -d)
out_file="$tmp_dir/bundle"
in_file="$tmp_dir/blob"
signing_config="$tmp_dir/signing-config.json"
trap 'rm -rf "$tmp_dir"' EXIT
cat > "$in_file"

no_default_rekor=
if [ "${{ needs.prepare.outputs.privateRepo }}" = "true" ]; then
no_default_rekor="--no-default-rekor=true"
fi

set -x

# Create signing config
COSIGN_EXPERIMENTAL=1 cosign signing-config create \
--with-default-services=true \
${no_default_rekor:+$no_default_rekor} \
--out="$signing_config"

# Sign with cosign
cosign sign-blob \
--yes \
--oidc-provider github-actions \
--new-bundle-format \
--use-signing-config \
--signing-config "$signing_config" \
--bundle "$out_file" \
--tlog-upload=${{ needs.prepare.outputs.privateRepo == 'false' }} \
"$in_file"

# Output bundle to stdout
Expand Down
22 changes: 17 additions & 5 deletions .github/workflows/build.yml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -447,21 +447,33 @@ jobs:
set -e

# Create temporary files
out_file=$(mktemp)
in_file=$(mktemp)
trap 'rm -f "$in_file" "$out_file"' EXIT
tmp_dir=$(mktemp -d)
out_file="$tmp_dir/bundle"
in_file="$tmp_dir/blob"
signing_config="$tmp_dir/signing-config.json"
trap 'rm -rf "$tmp_dir"' EXIT
cat > "$in_file"

no_default_rekor=
if [ "${{ needs.prepare.outputs.privateRepo }}" = "true" ]; then
no_default_rekor="--no-default-rekor=true"
fi

set -x

# Create signing config
COSIGN_EXPERIMENTAL=1 cosign signing-config create \
--with-default-services=true \
${no_default_rekor:+$no_default_rekor} \
--out="$signing_config"

# Sign with cosign
cosign sign-blob \
--yes \
--oidc-provider github-actions \
--new-bundle-format \
--use-signing-config \
--signing-config "$signing_config" \
--bundle "$out_file" \
--tlog-upload=${{ needs.prepare.outputs.privateRepo == 'false' }} \
"$in_file"

# Output bundle to stdout
Expand Down
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