New `knife config list-profiles` command to show available profiles.

Signed-off-by: Noah Kantrowitz <noah@coderanger.net>

1 files changed, 121 insertions, 0 deletions

diff --git a/lib/chef/knife/config_list_profiles.rb b/lib/chef/knife/config_list_profiles.rb
new file mode 100644
index 0000000000..8780f5824a
--- /dev/null
+++ b/lib/chef/knife/config_list_profiles.rb
@@ -0,0 +1,121 @@
+#
+# Copyright:: Copyright (c) 2018, Noah Kantrowitz
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require "chef/knife"
+require "chef/workstation_config_loader"
+
+class Chef
+  class Knife
+    class ConfigListProfiles < Knife
+      banner "knife config list-profiles"
+
+      option :ignore_knife_rb,
+             short: "-i",
+             long: "--ignore-knife-rb",
+             description: "Ignore the current knife.rb configuration",
+             default: false
+
+      def run
+        credentials_data = self.class.config_loader.parse_credentials_file
+        if credentials_data.nil? || credentials_data.empty?
+          # Should this just show the ambient knife.rb config as "default" instead?
+          ui.fatal("No profiles found, #{self.class.config_loader.credentials_file_path} does not exist or is empty")
+          exit 1
+        end
+
+        current_profile = self.class.config_loader.credentials_profile(config[:profile])
+        profiles = credentials_data.keys.map do |profile|
+          if config[:ignore_knife_rb]
+            # Don't do any fancy loading nonsense, just the raw data.
+            profile_data = credentials_data[profile]
+            {
+              profile: profile,
+              active: profile == current_profile,
+              client_name: profile_data["client_name"] || profile_data["node_name"],
+              client_key: profile_data["client_key"],
+              server_url: profile_data["chef_server_url"],
+            }
+          else
+            # Fancy loading nonsense so we get what the actual config would be.
+            # Note that this modifies the global config, after this, all bets are
+            # off as to whats in the config.
+            Chef::Config.reset
+            wcl = Chef::WorkstationConfigLoader.new(nil, Chef::Log, profile: profile)
+            wcl.load
+            {
+              profile: profile,
+              active: profile == current_profile,
+              client_name: Chef::Config[:node_name],
+              client_key: Chef::Config[:client_key],
+              server_url: Chef::Config[:chef_server_url],
+            }
+          end
+        end
+
+        # Try to reset the config.
+        unless config[:ignore_knife_rb]
+          Chef::Config.reset
+          Chef::WorkstationConfigLoader.new(config[:config_file], Chef::Log, profile: config[:profile]).load
+          apply_computed_config
+        end
+
+        if ui.interchange?
+          # Machine-readable output.
+          ui.output(profiles)
+        else
+          # Table output.
+          ui.output(render_table(profiles))
+        end
+      end
+
+      private
+
+      def render_table(profiles, padding: 2)
+        # Replace the home dir in the client key path with ~.
+        profiles.each do |profile|
+          profile[:client_key] = profile[:client_key].to_s.gsub(/^#{Regexp.escape(Dir.home)}/, '~') if profile[:client_key]
+        end
+        # Render the data to a 2D array that will be used for the table.
+        table_data = [['', 'Profile', 'Client', 'Key', 'Server']] + profiles.map do |profile|
+          [profile[:active] ? '*' : ''] + profile.values_at(:profile, :client_name, :client_key, :server_url).map(&:to_s)
+        end
+        # Compute column widths.
+        column_widths = table_data.first.length.times.map do |i|
+          table_data.map { |row| row[i].length + padding }.max
+        end
+        # Special case, the first col gets no padding (because indicator) and last
+        # get no padding because last.
+        column_widths[0] -= padding
+        column_widths[-1] -= padding
+        # Build the format string for each row.
+        format_string = column_widths.map { |w| "%-#{w}.#{w}s" }.join('')
+        format_string << "\n"
+        # Print the header row and a separator.
+        table = ui.color(format_string % table_data.first, :green)
+        table << "-" * column_widths.sum
+        table << "\n"
+        # Print the rest of the table.
+        table_data.drop(1).each do |row|
+          table << format_string % row
+        end
+        # Trim the last newline because ui.output adds one.
+        table.chomp!
+      end
+
+    end
+  end
+end