Chef Multi Line Command

Chef Multi line command

The && is the logical and operator of a shell. Either you explicitly start the command in a shell, like:

execute 'Execute a shell' do
    command "bash -c 'cmd1 && cmd2 && ..'"
end

or you use the bash resource:

bash 'Execute bash script' do
    code <<-EOH
    cmd1 \
    && cmd2 \
    && ... 
    EOH
end

Chef splits 'execute' command on multiple lines

Found the answer thanks to /u/coderanger's comment above!

I was getting instance_id from ec2metadata as follows:

instance_id = shell_out("ec2metadata --instance-id").stdout

Adding .strip fixed it:

instance_id = shell_out("ec2metadata --instance-id").stdout.strip

How do I add multiline statement inside chef gaurd?

Chef guards take in a block, like the first example here. Blocks can be multi line, but can't have methods declared inside of them. If you copy the contents of the method you found and put them inside the only_if that should work.

powershell_script "Restart Computer" do
  ...
  only_if do
    <contents of method here>
  end
end

While this will work, the cleaner way to implement such an extensive guard is to put the reboot_pending method in a library and call that method from your recipe.

Which Chef resource can I execute multiple lines of BASH code using Chef's sensititve property?

Answered in comments, true and false are lowercase in Ruby. Using True makes Ruby try to look for a const that doesn't exist.

Using a Chef recipe to append multiple lines to a config file

As you said yourself, the recommended Chef pattern is to manage the whole file.

If you're using Chef 11 you could probably make use of partials for what you're trying to achieve.

There's more info here and on this example cookbook.

As long as you have access to the original config template, just append <%= render "original_config.erb" %> to the top of your parms_to_append.conf template.

How can I create a simple text file that contains more than one line of text with CHEF?

You would use either the file resource or template resource, depending on if you wanted simple inline content, or a more complex Erb template:

file '/foo' do
  content "line one\nline two\n"
end

Chef - execute vs bash resource

For a single script, use an execute. The bash resource is for including the script contents inline in the recipe code.

How to parse multiline stdout with ruby, in Inspec test

Why are you using Open3? You want to be using the command resource, not direct Ruby command execution. That said, you would just compare to a string with \n in it.

---

Related Topics