Make script pass shellcheck
Signed-off-by: Cristian Ariza <dev@cristianrz.com>
This commit is contained in:
Cristian Ariza
parent
d984d3053b
commit
6fabb93f73
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@ -24,7 +24,9 @@ usage() {
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dir="$1" # dir for building tar in
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shift || usage 1 >&2
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[ $# -gt 0 -a "$dir" ] || usage 2 >&2
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if ! [ $# -gt 0 ] && [ "$dir" ]; then
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usage 2 >&2
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fi
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mkdir -p "$dir"
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# hacky workarounds for Bash 3 support (no associative arrays)
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@ -37,7 +39,7 @@ doNotGenerateManifestJson=
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# bash v4 on Windows CI requires CRLF separator
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newlineIFS=$'\n'
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if [ "$(go env GOHOSTOS)" = 'windows' ]; then
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major=$(echo ${BASH_VERSION%%[^0.9]} | cut -d. -f1)
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major=$(echo "${BASH_VERSION%%[^0.9]}" | cut -d. -f1)
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if [ "$major" -ge 4 ]; then
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newlineIFS=$'\r\n'
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fi
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@ -59,7 +61,8 @@ fetch_blob() {
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shift
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local curlArgs=("$@")
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local curlHeaders="$(
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local curlHeaders
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curlHeaders="$(
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curl -S "${curlArgs[@]}" \
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-H "Authorization: Bearer $token" \
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"$registryBase/v2/$image/blobs/$digest" \
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@ -70,7 +73,8 @@ fetch_blob() {
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if grep -qE "^HTTP/[0-9].[0-9] 3" <<< "$curlHeaders"; then
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rm -f "$targetFile"
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local blobRedirect="$(echo "$curlHeaders" | awk -F ': ' 'tolower($1) == "location" { print $2; exit }')"
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local blobRedirect
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blobRedirect="$(echo "$curlHeaders" | awk -F ': ' 'tolower($1) == "location" { print $2; exit }')"
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if [ -z "$blobRedirect" ]; then
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echo >&2 "error: failed fetching '$image' blob '$digest'"
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echo "$curlHeaders" | head -1 >&2
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@ -88,15 +92,18 @@ handle_single_manifest_v2() {
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local manifestJson="$1"
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shift
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local configDigest="$(echo "$manifestJson" | jq --raw-output '.config.digest')"
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local configDigest
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configDigest="$(echo "$manifestJson" | jq --raw-output '.config.digest')"
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local imageId="${configDigest#*:}" # strip off "sha256:"
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local configFile="$imageId.json"
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fetch_blob "$token" "$image" "$configDigest" "$dir/$configFile" -s
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local layersFs="$(echo "$manifestJson" | jq --raw-output --compact-output '.layers[]')"
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local layersFs
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layersFs="$(echo "$manifestJson" | jq --raw-output --compact-output '.layers[]')"
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local IFS="$newlineIFS"
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local layers=($layersFs)
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local layers
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mapfile -t layers <<< "$layersFs"
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unset IFS
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echo "Downloading '$imageIdentifier' (${#layers[@]} layers)..."
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@ -105,8 +112,10 @@ handle_single_manifest_v2() {
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for i in "${!layers[@]}"; do
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local layerMeta="${layers[$i]}"
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local layerMediaType="$(echo "$layerMeta" | jq --raw-output '.mediaType')"
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local layerDigest="$(echo "$layerMeta" | jq --raw-output '.digest')"
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local layerMediaType
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layerMediaType="$(echo "$layerMeta" | jq --raw-output '.mediaType')"
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local layerDigest
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layerDigest="$(echo "$layerMeta" | jq --raw-output '.digest')"
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# save the previous layer's ID
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local parentId="$layerId"
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@ -118,8 +127,10 @@ handle_single_manifest_v2() {
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echo '1.0' > "$dir/$layerId/VERSION"
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if [ ! -s "$dir/$layerId/json" ]; then
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local parentJson="$(printf ', parent: "%s"' "$parentId")"
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local addJson="$(printf '{ id: "%s"%s }' "$layerId" "${parentId:+$parentJson}")"
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local parentJson
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parentJson="$(printf ', parent: "%s"' "$parentId")"
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local addJson
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addJson="$(printf '{ id: "%s"%s }' "$layerId" "${parentId:+$parentJson}")"
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# this starter JSON is taken directly from Docker's own "docker save" output for unimportant layers
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jq "$addJson + ." > "$dir/$layerId/json" <<- 'EOJSON'
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{
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@ -159,7 +170,8 @@ handle_single_manifest_v2() {
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echo "skipping existing ${layerId:0:12}"
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continue
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fi
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local token="$(curl -fsSL "$authBase/token?service=$authService&scope=repository:$image:pull" | jq --raw-output '.token')"
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local token
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token="$(curl -fsSL "$authBase/token?service=$authService&scope=repository:$image:pull" | jq --raw-output '.token')"
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fetch_blob "$token" "$image" "$layerDigest" "$dir/$layerTar" --progress-bar
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;;
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@ -174,10 +186,12 @@ handle_single_manifest_v2() {
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imageId="$layerId"
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# munge the top layer image manifest to have the appropriate image configuration for older daemons
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local imageOldConfig="$(jq --raw-output --compact-output '{ id: .id } + if .parent then { parent: .parent } else {} end' "$dir/$imageId/json")"
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local imageOldConfig
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imageOldConfig="$(jq --raw-output --compact-output '{ id: .id } + if .parent then { parent: .parent } else {} end' "$dir/$imageId/json")"
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jq --raw-output "$imageOldConfig + del(.history, .rootfs)" "$dir/$configFile" > "$dir/$imageId/json"
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local manifestJsonEntry="$(
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local manifestJsonEntry
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manifestJsonEntry="$(
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echo '{}' | jq --raw-output '. + {
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Config: "'"$configFile"'",
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RepoTags: ["'"${image#library\/}:$tag"'"],
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@ -232,7 +246,7 @@ while [ $# -gt 0 ]; do
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application/vnd.docker.distribution.manifest.list.v2+json)
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layersFs="$(echo "$manifestJson" | jq --raw-output --compact-output '.manifests[]')"
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IFS="$newlineIFS"
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layers=($layersFs)
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mapfile -t layers <<< "$layersFs"
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unset IFS
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found=""
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@ -278,7 +292,7 @@ while [ $# -gt 0 ]; do
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layersFs="$(echo "$manifestJson" | jq --raw-output '.fsLayers | .[] | .blobSum')"
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IFS="$newlineIFS"
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layers=($layersFs)
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mapfile -t layers <<< "$layersFs"
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unset IFS
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history="$(echo "$manifestJson" | jq '.history | [.[] | .v1Compatibility]')"
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