abe0731d2e
When `/etc/hosts` contained a FQDN with a trailing dot, the `\b` in the sed expression would not match, since dot is not considered to be a word character. Fix this by regexp-escaping the hostname search, and matching the end of the line on optional space followed by additional characters. Also add some tests that extract the regexp used by sed and verify that it does what we want. These will hopefully serve us in the future if we ever need to test additional edge cases.
84 lines
2.0 KiB
Ruby
84 lines
2.0 KiB
Ruby
module VagrantPlugins
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module GuestDebian
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module Cap
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class ChangeHostName
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def self.change_host_name(machine, name)
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new(machine, name).change!
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end
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attr_reader :machine, :new_hostname
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def initialize(machine, new_hostname)
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@machine = machine
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@new_hostname = new_hostname
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end
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def change!
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return unless should_change?
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update_etc_hostname
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update_etc_hosts
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refresh_hostname_service
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update_mailname
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renew_dhcp
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end
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def should_change?
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new_hostname != current_hostname
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end
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def current_hostname
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@current_hostname ||= get_current_hostname
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end
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def get_current_hostname
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sudo "hostname -f" do |type, data|
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return data.chomp if type == :stdout
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end
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''
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end
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def update_etc_hostname
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sudo("echo '#{short_hostname}' > /etc/hostname")
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end
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# /etc/hosts should resemble:
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# 127.0.0.1 localhost
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# 127.0.1.1 host.fqdn.com host.fqdn host
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def update_etc_hosts
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ip_address = '([0-9]{1,3}\.){3}[0-9]{1,3}'
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search = "^(#{ip_address})\\s+#{Regexp.escape(current_hostname)}(\\s.*)?$"
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replace = "\\1 #{fqdn} #{short_hostname}"
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expression = ['s', search, replace, 'g'].join('@')
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sudo("sed -ri '#{expression}' /etc/hosts")
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end
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def refresh_hostname_service
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sudo("hostname -F /etc/hostname")
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end
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def update_mailname
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sudo("hostname --fqdn > /etc/mailname")
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end
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def renew_dhcp
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sudo("ifdown -a; ifup -a; ifup eth0")
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end
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def fqdn
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new_hostname
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end
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def short_hostname
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new_hostname.split('.').first
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end
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def sudo(cmd, &block)
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machine.communicate.sudo(cmd, &block)
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end
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end
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end
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end
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end
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