/usr/lib/python2.7/dist-packages/roswtf/rules.py is in python-roswtf 1.11.16-3.
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"""
Common library for writing rule-style checks for generating warnings
and errors. Use of this style streamlines reporting.
The pattern for rules is simple: a rule provides a function that
implements the rule and a format string. If the function returns a
non-zero value, that value is combined with the format string to
produced an error reporting string. There are other conveniences as
well. If the rule returns a list or a tuple, that will be transformed
into a human-readable list.
This library is a layer on top of the base L{WtfWarning} and
L{WtfError} representation in roswtf.model.
"""
from roswtf.model import WtfWarning, WtfError
def _check_rule(rule, ret, ctx, ctx_list, level):
if ret:
d = ctx.as_dictionary()
def isstring(s):
"""Small helper version to check an object is a string in
a way that works for both Python 2 and 3
"""
try:
return isinstance(s, basestring)
except NameError:
return isinstance(s, str)
if type(ret) in (tuple, list):
f_msg = rule[1]
ret_str = '\n'.join([" * %s"%r for r in ret])
ctx_list.append(level(f_msg%d + "\n" + ret_str+'\n', f_msg, ret))
elif isstring(ret):
f_msg = rule[1]
ctx_list.append(level(f_msg%d + ret%d, f_msg, ret))
else:
f_msg = rule[1]
ctx_list.append(level(f_msg%d, f_msg, ret))
def warning_rule(rule, ret, ctx):
"""
Check return value of rule and update ctx if rule failed.
@param rule: Rule/message pair.
@type rule: (rule_fn, format_msg)
@param ret: return value of rule. If value is non-zero, rule failed
@param ret: Any
@param ctx: context for which rule failed
@param ctx: L{WtfContext}
"""
_check_rule(rule, ret, ctx, ctx.warnings, WtfWarning)
def error_rule(rule, ret, ctx):
"""
Check return value of rule and update ctx if rule failed.
@param rule: Rule/message pair.
@type rule: (rule_fn, format_msg)
@param ret: return value of rule. If value is non-zero, rule failed
@type ret: Any
@param ctx: context for which rule failed
@type ctx: L{WtfContext}
"""
_check_rule(rule, ret, ctx, ctx.errors, WtfError)
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