While tinkering around tonight I figured I'd share my multline sed for updating sha256:
for i in `port -q echo maintainer:snc`; do x=$(sudo port -v checksum $i | grep
sha256 |grep -v checksum | awk '{print $NF}'); sed -i '' -n
'1h;1!H;${;g;s/sha256\ \ s/sha256\ \ '$x'/g;p;}' "`port file $i`"; done
2>/dev/null
It assumes you have this line as a placeholder in the portfile already:
sha256 s
You can follow the general idea to come up with other handy patterns.
smime.p7s
Description: S/MIME cryptographic signature
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