+def _FormatBool(value):
+ """Formats a boolean value as a string.
+
+ """
+ if value:
+ return "Y"
+ return "N"
+
+
+#: Default formatting for query results; (callback, align right)
+_DEFAULT_FORMAT_QUERY = {
+ constants.QFT_TEXT: (str, False),
+ constants.QFT_BOOL: (_FormatBool, False),
+ constants.QFT_NUMBER: (str, True),
+ constants.QFT_TIMESTAMP: (utils.FormatTime, False),
+ constants.QFT_OTHER: (str, False),
+ constants.QFT_UNKNOWN: (str, False),
+ }
+
+
+def _GetColumnFormatter(fdef, override, unit):
+ """Returns formatting function for a field.
+
+ @type fdef: L{objects.QueryFieldDefinition}
+ @type override: dict
+ @param override: Dictionary for overriding field formatting functions,
+ indexed by field name, contents like L{_DEFAULT_FORMAT_QUERY}
+ @type unit: string
+ @param unit: Unit used for formatting fields of type L{constants.QFT_UNIT}
+ @rtype: tuple; (callable, bool)
+ @return: Returns the function to format a value (takes one parameter) and a
+ boolean for aligning the value on the right-hand side
+
+ """
+ fmt = override.get(fdef.name, None)
+ if fmt is not None:
+ return fmt
+
+ assert constants.QFT_UNIT not in _DEFAULT_FORMAT_QUERY
+
+ if fdef.kind == constants.QFT_UNIT:
+ # Can't keep this information in the static dictionary
+ return (lambda value: utils.FormatUnit(value, unit), True)
+
+ fmt = _DEFAULT_FORMAT_QUERY.get(fdef.kind, None)
+ if fmt is not None:
+ return fmt
+
+ raise NotImplementedError("Can't format column type '%s'" % fdef.kind)
+
+
+class _QueryColumnFormatter:
+ """Callable class for formatting fields of a query.
+
+ """
+ def __init__(self, fn, status_fn, verbose):
+ """Initializes this class.
+
+ @type fn: callable
+ @param fn: Formatting function
+ @type status_fn: callable
+ @param status_fn: Function to report fields' status
+ @type verbose: boolean
+ @param verbose: whether to use verbose field descriptions or not
+
+ """
+ self._fn = fn
+ self._status_fn = status_fn
+ self._verbose = verbose
+
+ def __call__(self, data):
+ """Returns a field's string representation.
+
+ """
+ (status, value) = data
+
+ # Report status
+ self._status_fn(status)
+
+ if status == constants.RS_NORMAL:
+ return self._fn(value)
+
+ assert value is None, \
+ "Found value %r for abnormal status %s" % (value, status)
+
+ return FormatResultError(status, self._verbose)
+
+
+def FormatResultError(status, verbose):
+ """Formats result status other than L{constants.RS_NORMAL}.
+
+ @param status: The result status
+ @type verbose: boolean
+ @param verbose: Whether to return the verbose text
+ @return: Text of result status
+
+ """
+ assert status != constants.RS_NORMAL, \
+ "FormatResultError called with status equal to constants.RS_NORMAL"
+ try:
+ (verbose_text, normal_text) = constants.RSS_DESCRIPTION[status]
+ except KeyError:
+ raise NotImplementedError("Unknown status %s" % status)
+ else:
+ if verbose:
+ return verbose_text
+ return normal_text
+
+
+def FormatQueryResult(result, unit=None, format_override=None, separator=None,
+ header=False, verbose=False):
+ """Formats data in L{objects.QueryResponse}.
+
+ @type result: L{objects.QueryResponse}
+ @param result: result of query operation
+ @type unit: string
+ @param unit: Unit used for formatting fields of type L{constants.QFT_UNIT},
+ see L{utils.text.FormatUnit}
+ @type format_override: dict
+ @param format_override: Dictionary for overriding field formatting functions,
+ indexed by field name, contents like L{_DEFAULT_FORMAT_QUERY}
+ @type separator: string or None
+ @param separator: String used to separate fields
+ @type header: bool
+ @param header: Whether to output header row
+ @type verbose: boolean
+ @param verbose: whether to use verbose field descriptions or not
+
+ """
+ if unit is None:
+ if separator:
+ unit = "m"
+ else:
+ unit = "h"
+
+ if format_override is None:
+ format_override = {}
+
+ stats = dict.fromkeys(constants.RS_ALL, 0)
+
+ def _RecordStatus(status):
+ if status in stats:
+ stats[status] += 1
+
+ columns = []
+ for fdef in result.fields:
+ assert fdef.title and fdef.name
+ (fn, align_right) = _GetColumnFormatter(fdef, format_override, unit)
+ columns.append(TableColumn(fdef.title,
+ _QueryColumnFormatter(fn, _RecordStatus,
+ verbose),
+ align_right))
+
+ table = FormatTable(result.data, columns, header, separator)
+
+ # Collect statistics
+ assert len(stats) == len(constants.RS_ALL)
+ assert compat.all(count >= 0 for count in stats.values())
+
+ # Determine overall status. If there was no data, unknown fields must be
+ # detected via the field definitions.
+ if (stats[constants.RS_UNKNOWN] or
+ (not result.data and _GetUnknownFields(result.fields))):
+ status = QR_UNKNOWN
+ elif compat.any(count > 0 for key, count in stats.items()
+ if key != constants.RS_NORMAL):
+ status = QR_INCOMPLETE
+ else:
+ status = QR_NORMAL
+
+ return (status, table)
+
+
+def _GetUnknownFields(fdefs):
+ """Returns list of unknown fields included in C{fdefs}.
+
+ @type fdefs: list of L{objects.QueryFieldDefinition}
+
+ """
+ return [fdef for fdef in fdefs
+ if fdef.kind == constants.QFT_UNKNOWN]
+
+
+def _WarnUnknownFields(fdefs):
+ """Prints a warning to stderr if a query included unknown fields.
+
+ @type fdefs: list of L{objects.QueryFieldDefinition}
+
+ """
+ unknown = _GetUnknownFields(fdefs)
+ if unknown:
+ ToStderr("Warning: Queried for unknown fields %s",
+ utils.CommaJoin(fdef.name for fdef in unknown))
+ return True
+
+ return False
+
+
+def GenericList(resource, fields, names, unit, separator, header, cl=None,
+ format_override=None, verbose=False, force_filter=False):
+ """Generic implementation for listing all items of a resource.
+
+ @param resource: One of L{constants.QR_VIA_LUXI}
+ @type fields: list of strings
+ @param fields: List of fields to query for
+ @type names: list of strings
+ @param names: Names of items to query for
+ @type unit: string or None
+ @param unit: Unit used for formatting fields of type L{constants.QFT_UNIT} or
+ None for automatic choice (human-readable for non-separator usage,
+ otherwise megabytes); this is a one-letter string
+ @type separator: string or None
+ @param separator: String used to separate fields
+ @type header: bool
+ @param header: Whether to show header row
+ @type force_filter: bool
+ @param force_filter: Whether to always treat names as filter
+ @type format_override: dict
+ @param format_override: Dictionary for overriding field formatting functions,
+ indexed by field name, contents like L{_DEFAULT_FORMAT_QUERY}
+ @type verbose: boolean
+ @param verbose: whether to use verbose field descriptions or not
+
+ """
+ if not names:
+ names = None
+
+ qfilter = qlang.MakeFilter(names, force_filter)
+
+ if cl is None:
+ cl = GetClient()
+
+ response = cl.Query(resource, fields, qfilter)
+
+ found_unknown = _WarnUnknownFields(response.fields)
+
+ (status, data) = FormatQueryResult(response, unit=unit, separator=separator,
+ header=header,
+ format_override=format_override,
+ verbose=verbose)
+
+ for line in data:
+ ToStdout(line)
+
+ assert ((found_unknown and status == QR_UNKNOWN) or
+ (not found_unknown and status != QR_UNKNOWN))
+
+ if status == QR_UNKNOWN:
+ return constants.EXIT_UNKNOWN_FIELD
+
+ # TODO: Should the list command fail if not all data could be collected?
+ return constants.EXIT_SUCCESS
+
+
+def GenericListFields(resource, fields, separator, header, cl=None):
+ """Generic implementation for listing fields for a resource.
+
+ @param resource: One of L{constants.QR_VIA_LUXI}
+ @type fields: list of strings
+ @param fields: List of fields to query for
+ @type separator: string or None
+ @param separator: String used to separate fields
+ @type header: bool
+ @param header: Whether to show header row
+
+ """
+ if cl is None:
+ cl = GetClient()
+
+ if not fields:
+ fields = None
+
+ response = cl.QueryFields(resource, fields)
+
+ found_unknown = _WarnUnknownFields(response.fields)
+
+ columns = [
+ TableColumn("Name", str, False),
+ TableColumn("Title", str, False),
+ TableColumn("Description", str, False),
+ ]
+
+ rows = [[fdef.name, fdef.title, fdef.doc] for fdef in response.fields]
+
+ for line in FormatTable(rows, columns, header, separator):
+ ToStdout(line)
+
+ if found_unknown:
+ return constants.EXIT_UNKNOWN_FIELD
+
+ return constants.EXIT_SUCCESS
+
+
+class TableColumn:
+ """Describes a column for L{FormatTable}.
+
+ """
+ def __init__(self, title, fn, align_right):
+ """Initializes this class.
+
+ @type title: string
+ @param title: Column title
+ @type fn: callable
+ @param fn: Formatting function
+ @type align_right: bool
+ @param align_right: Whether to align values on the right-hand side
+
+ """
+ self.title = title
+ self.format = fn
+ self.align_right = align_right
+
+
+def _GetColFormatString(width, align_right):
+ """Returns the format string for a field.
+
+ """
+ if align_right:
+ sign = ""
+ else:
+ sign = "-"
+
+ return "%%%s%ss" % (sign, width)
+
+
+def FormatTable(rows, columns, header, separator):
+ """Formats data as a table.
+
+ @type rows: list of lists
+ @param rows: Row data, one list per row
+ @type columns: list of L{TableColumn}
+ @param columns: Column descriptions
+ @type header: bool
+ @param header: Whether to show header row
+ @type separator: string or None
+ @param separator: String used to separate columns
+
+ """
+ if header:
+ data = [[col.title for col in columns]]
+ colwidth = [len(col.title) for col in columns]
+ else:
+ data = []
+ colwidth = [0 for _ in columns]
+
+ # Format row data
+ for row in rows:
+ assert len(row) == len(columns)
+
+ formatted = [col.format(value) for value, col in zip(row, columns)]
+
+ if separator is None:
+ # Update column widths
+ for idx, (oldwidth, value) in enumerate(zip(colwidth, formatted)):
+ # Modifying a list's items while iterating is fine
+ colwidth[idx] = max(oldwidth, len(value))
+
+ data.append(formatted)
+
+ if separator is not None:
+ # Return early if a separator is used
+ return [separator.join(row) for row in data]
+
+ if columns and not columns[-1].align_right:
+ # Avoid unnecessary spaces at end of line
+ colwidth[-1] = 0
+
+ # Build format string
+ fmt = " ".join([_GetColFormatString(width, col.align_right)
+ for col, width in zip(columns, colwidth)])
+
+ return [fmt % tuple(row) for row in data]
+
+
projects / ganeti-local / blobdiff