elvish_config/aliases/cleankh.elv

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edit:add-var cleankh~ {|@argv|
use str
use framagit.org/benjamin.vaudour/elv-lib/mods/common
use framagit.org/benjamin.vaudour/elv-lib/mods/ip
use framagit.org/benjamin.vaudour/elv-lib/mods/list
var hosts = [&]
var ips = [&]
var ids = [&]
var file = $E:HOME/.ssh/known_hosts
fn readfile {
cat $file | each {|l|
if (not (str:has-prefix $l '#')) {
put $l
}
} | eawk {|_ host @rest|
var id = (str:join ' ' $rest)
var ihosts = []
str:split ',' $host | each {|h|
set @ihosts = $@ihosts $h
if (ip:is-ip $h) {
if (not (has-key $ips $h)) {
set ips[$h] = [ $id ]
} else {
set ips[$h] = [ (all $ips[$h]) $id ]
}
} else {
if (not (has-key $hosts $h)) {
set hosts[$h] = [ $id ]
} else {
set hosts[$h] = [ (all $hosts[$h]) $id ]
}
}
}
}
}
fn searchips {|id|
if (has-key $ids $id) {
each {|h|
if (ip:is-ip $h) {
put $h
}
} $ids[$id]
}
}
fn hashost {|id|
if (has-key $ids $id) {
list:contains {|h| not (ip:is-ip $h) } $ids[$id]
} else {
put $false
}
}
fn formatlines {
keys $hosts | order | each {|h|
order $hosts[$h] | each {|id|
var hid = (str:join ',' [ $h (searchips $id) ])
put $hid $id | str:join ' '
}
}
keys $ips | list:sort $ip:comp~ | each {|ip|
order $ips[$ip] | each {|id|
if (not (hashost $id)) {
put $ip $id | str:join ' '
}
}
}
}
readfile
var @lines = (formatlines)
echo (str:join "\n" $lines) > $file
}