+def edit_and_commit_object initial_obj, tmp_stem, global_opts, &block
+
+ content = case global_opts[:format]
+ when 'json'
+ Oj.dump(initial_obj, :indent => 1)
+ when 'yaml'
+ initial_obj.to_yaml
+ else
+ abort "Unrecognized format #{global_opts[:format]}"
+ end
+
+ tmp_file = Tempfile.new([tmp_stem, ".#{global_opts[:format]}"])
+ tmp_file.write(content)
+ tmp_file.close
+
+ begin
+ error_text = ''
+ while true
+ begin
+ run_editor tmp_file.path
+
+ tmp_file.open
+ newcontent = tmp_file.read()
+ tmp_file.close
+
+ # Strip lines starting with '#'
+ newcontent = newcontent.lines.select {|l| !l.start_with? '#'}.join
+
+ # Load the new object
+ newobj = case global_opts[:format]
+ when 'json'
+ Oj.load(newcontent)
+ when 'yaml'
+ YAML.load(newcontent)
+ end
+
+ yield newobj
+
+ break
+ rescue => e
+ can_retry = true
+ if e.is_a? Psych::SyntaxError
+ this_error = "YAML error parsing your input: #{e}"
+ elsif e.is_a? JSON::ParserError or e.is_a? Oj::ParseError
+ this_error = "JSON error parsing your input: #{e}"
+ elsif e.is_a? ArvadosAPIError
+ this_error = "API responded with error #{e}"
+ else
+ this_error = "#{e.class}: #{e}"
+ can_retry = false
+ end
+ puts this_error
+
+ tmp_file.open
+ newcontent = tmp_file.read()
+ tmp_file.close
+
+ if newcontent == error_text or not can_retry
+ FileUtils::cp tmp_file.path, tmp_file.path + ".saved"
+ puts "File is unchanged, edit aborted." if can_retry
+ abort "Saved contents to " + tmp_file.path + ".saved"
+ else
+ tmp_file.open
+ tmp_file.truncate 0
+ error_text = this_error.to_s.lines.map {|l| '# ' + l}.join + "\n"
+ error_text += "# Please fix the error and try again.\n"
+ error_text += newcontent.lines.select {|l| !l.start_with? '#'}.join
+ tmp_file.write error_text
+ tmp_file.close
+ end
+ end
+ end
+ ensure
+ tmp_file.close(true)
+ end
+
+ nil
+end
+
+class ArvadosAPIError < RuntimeError
+end
+
+def check_response result
+ begin
+ results = JSON.parse result.body
+ rescue JSON::ParserError, Oj::ParseError => e
+ raise "Failed to parse server response:\n" + e.to_s
+ end
+
+ if result.response.status != 200
+ raise ArvadosAPIError.new("#{result.response.status}: #{
+ ((results['errors'] && results['errors'].join('\n')) ||
+ Net::HTTPResponse::CODE_TO_OBJ[status.to_s].to_s.sub(/^Net::HTTP/, '').titleize)}")
+ end
+
+ results
+end
+
+def arv_edit client, arvados, global_opts, remaining_opts
+ uuid = remaining_opts.shift
+ if uuid.nil? or uuid == "-h" or uuid == "--help"
+ puts head_banner
+ puts "Usage: arv edit [uuid] [fields...]\n\n"
+ puts "Fetch the specified Arvados object, select the specified fields, \n"
+ puts "open an interactive text editor on a text representation (json or\n"
+ puts "yaml, use --format) and then update the object. Will use 'nano'\n"
+ puts "by default, customize with the EDITOR or VISUAL environment variable.\n"
+ exit 255
+ end
+
+ if not $stdout.tty?
+ puts "Not connected to a TTY, cannot run interactive editor."
+ exit 1
+ end
+
+ # determine controller
+
+ m = /([a-z0-9]{5})-([a-z0-9]{5})-([a-z0-9]{15})/.match uuid
+ if !m
+ if /^[a-f0-9]{32}/.match uuid
+ abort "Arvados collections are not editable."
+ else
+ abort "'#{uuid}' does not appear to be an Arvados uuid"
+ end
+ end
+
+ rsc = nil
+ arvados.discovery_document["resources"].each do |k,v|
+ klass = k.singularize.camelize
+ dig = Digest::MD5.hexdigest(klass).to_i(16).to_s(36)[-5..-1]
+ if dig == m[2]
+ rsc = k
+ end
+ end
+
+ if rsc.nil?
+ abort "Could not determine resource type #{m[2]}"
+ end
+
+ begin
+ result = client.execute(:api_method => eval('arvados.' + rsc + '.get'),
+ :parameters => {"uuid" => uuid},
+ :authenticated => false,
+ :headers => {
+ authorization: 'OAuth2 '+ENV['ARVADOS_API_TOKEN']
+ })
+ oldobj = check_response result
+ rescue => e
+ abort "Server error: #{e}"
+ end
+
+ if remaining_opts.length > 0
+ oldobj.select! { |k, v| remaining_opts.include? k }
+ end
+
+ edit_and_commit_object oldobj, uuid, global_opts do |newobj|
+ newobj.select! {|k| newobj[k] != oldobj[k]}
+ if !newobj.empty?
+ result = client.execute(:api_method => eval('arvados.' + rsc + '.update'),
+ :parameters => {"uuid" => uuid},
+ :body_object => { rsc.singularize => newobj },
+ :authenticated => false,
+ :headers => {
+ authorization: 'OAuth2 '+ENV['ARVADOS_API_TOKEN']
+ })
+ results = check_response result
+ puts "Updated object #{results['uuid']}"
+ else
+ puts "Object is unchanged, did not update."
+ end
+ end
+
+ exit 0