add support for `leap facts`. includes some fun new helpers, like run_with_progress(), capture(), and replace_file!().

1 files changed, 93 insertions, 0 deletions

diff --git a/lib/leap_cli/commands/facts.rb b/lib/leap_cli/commands/facts.rb
new file mode 100644
index 0000000..3653c46
--- /dev/null
+++ b/lib/leap_cli/commands/facts.rb
@@ -0,0 +1,93 @@
+#
+# Gather facter facts
+#
+
+module LeapCli; module Commands
+
+  desc 'Gather information on nodes.'
+  command :facts do |facts|
+    facts.desc 'Query servers to update facts.json.'
+    facts.long_desc "Queries every node included in FILTER and saves the important information to facts.json"
+    facts.arg_name 'FILTER'
+    facts.command :update do |update|
+      update.action do |global_options,options,args|
+        update_facts(global_options, options, args)
+      end
+    end
+  end
+
+  protected
+
+  def facter_cmd
+    'facter --json ' + Leap::Platform.facts.join(' ')
+  end
+
+  def remove_node_facts(name)
+    if file_exists?(:facts)
+      update_facts_file({name => nil})
+    end
+  end
+
+  def update_node_facts(name, facts)
+    update_facts_file({name => facts})
+  end
+
+  def rename_node_facts(old_name, new_name)
+    if file_exists?(:facts)
+      facts = JSON.parse(read_file(:facts) || {})
+      facts[new_name] = facts[old_name]
+      facts[old_name] = nil
+      update_facts_file(facts, true)
+    end
+  end
+
+  #
+  # if overwrite = true, then ignore existing facts.json.
+  #
+  def update_facts_file(new_facts, overwrite=false)
+    replace_file!(:facts) do |content|
+      if overwrite || content.nil? || content.empty?
+        old_facts = {}
+      else
+        old_facts = JSON.parse(content)
+      end
+      facts = old_facts.merge(new_facts)
+      facts.each do |name, value|
+        if value.is_a? String
+          if value == ""
+            value = nil
+          else
+            value = JSON.parse(value)
+          end
+        end
+        if value.is_a? Hash
+          value.delete_if {|key,v| v.nil?}
+        end
+        facts[name] = value
+      end
+      facts.delete_if do |name, value|
+        value.nil? || value.empty?
+      end
+      if facts.empty?
+        nil
+      else
+        JSON.sorted_generate(facts) + "\n"
+      end
+    end
+  end
+
+  private
+
+  def update_facts(global_options, options, args)
+    nodes = manager.filter(args)
+    new_facts = {}
+    ssh_connect(nodes) do |ssh|
+      ssh.leap.run_with_progress(facter_cmd) do |response|
+        new_facts[response[:host]] = response[:data].strip
+      end
+    end
+    overwrite_existing = args.empty?
+    update_facts_file(new_facts, overwrite_existing)
+  end
+
+end; end
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