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function check_install -a tool -a package
if test (count $argv) -lt 1
return 1
end
if command -sq $tool
return 0
end
if not ask "$tool doesn't seem to be installed. Attempt to install it?"
return 1
end
if test -z $package
set package $tool
end
pkgadd $package || return 1
if not command -sq $tool
return 1
end
return 0
end
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