image inspection helpers

.zshrc

# Diff two image filesystems
function cdiff-fs() {
  diff \
    <(crane export $1 - --platform ${3:-linux/amd64} | tar -tvf - | sort) \
    <(crane export $2 - --platform ${3:-linux/amd64} | tar -tvf - | sort)
}
# Diff two image configs
function cdiff-cfg() {
  diff \
    <(crane config $1 --platform ${3:-linux/amd64} | jq) \
    <(crane config $2 --platform ${3:-linux/amd64} | jq)
}
# Diff two image manifests
function cdiff-mf() {
  diff \
    <(crane manifest $1 --platform ${3:-linux/amd64} | jq) \
    <(crane manifest $2 --platform ${3:-linux/amd64} | jq)
}
# Get image size
function imgsize() {
  crane manifest $1 --platform ${2:-linux/amd64} | jq '.config.size + ([.layers[].size] | add)' | numfmt --to=iec
}
# List files in image
function cls() {
  crane export $1 --platform ${2:-linux/amd64} | tar -tvf -
}
# Cat file in image
function ccat() {
  crane export $1 --platform ${3:-linux/amd64} - | tar -Oxf - $2
}