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__fish_print_hostnames: Improve ssh known_hosts extraction

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This now includes hosts with custom ports (and other hosts with the
same key), and explicitly excludes negated hosts, those with a
wildcard and those with an `@`-marker (e.g. `@revoked`)

It's also possibly a bit quicker because the ordering is better,
especially for files with many comments.
This commit is contained in:
Fabian Homborg 2017-09-05 16:31:12 +02:00
parent 57753c7303
commit 32e65ed301
1 changed files with 10 additions and 3 deletions
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13
share/functions/__fish_print_hostnames.fish
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@ -95,9 +95,16 @@ function __fish_print_hostnames -d "Print a list of known hostnames"
end
end
for file in $known_hosts
# Ignore hosts that are hashed, commented or have custom ports (like [localhost]:2200)
test -r $file
and string replace -ra '(\S+) .*' '$1' <$file | string match -r '^[^#|[=]+$' | string split ","
if test -r $file
# Ignore hosts that are hashed, commented or @-marked and strip the key.
string replace -r '[#@| ].*' '' <$file \
# Split on ",".
# Ignore negated/wildcarded hosts.
| string split "," | string match -rv '[!\*\?]' \
# Extract hosts with custom port.
| string replace -r '\[([^]]+)\]:.*' '$1'
# string replace -ra '(\S+) .*' '$1' <$file | string match -r '^[^#|[=]+$' | string split ","
end
end
return 0
end