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module Puppet::Parser::Functions
newfunction(:validate_cmd, :doc => <<-'ENDHEREDOC') do |args|
Perform validation of a string with an external command.
The first argument of this function should be a string to
test, and the second argument should be a path to a test command
taking a file as last argument. If the command, launched against
a tempfile containing the passed string, returns a non-null value,
compilation will abort with a parse error.
If a third argument is specified, this will be the error message raised and
seen by the user.
A helpful error message can be returned like this:
Example:
validate_cmd($sudoerscontent, '/usr/sbin/visudo -c -f', 'Visudo failed to validate sudoers content')
ENDHEREDOC
if (args.length < 2) or (args.length > 3) then
raise Puppet::ParseError, ("validate_cmd(): wrong number of arguments (#{args.length}; must be 2 or 3)")
end
msg = args[2] || "validate_cmd(): failed to validate content with command #{args[1].inspect}"
content = args[0]
checkscript = args[1]
# Test content in a temporary file
tmpfile = Tempfile.new("validate_cmd")
begin
tmpfile.write(content)
output = `#{checkscript} #{tmpfile.path} 2>&1 1>/dev/null`
r = $?
ensure
tmpfile.close
tmpfile.unlink
end
if output
msg += "\nOutput is:\n#{output}"
end
raise Puppet::ParseError, (msg) unless r == 0
end
end
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