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Size: 1.12 KB
Versions: 8
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Stored size: 1.12 KB
Contents
module Mutant
# Stream filter for warnings
class WarningFilter
include Equalizer.new(:target)
WARNING_PATTERN = /\A(?:.+):(?:\d+): warning: (?:.+)\n\z/
# Initialize object
#
# @param [#write] target
#
# @return [undefined]
def initialize(target)
@target = target
@warnings = []
end
# Warnings captured by filter
#
# @return [Array<String>]
attr_reader :warnings
# Target stream to capture warnings on
#
# @return [#write] target
#
# @return [undefined]
attr_reader :target
protected :target
# Write message to target filtering warnings
#
# @param [String] message
#
# @return [self]
def write(message)
if WARNING_PATTERN =~ message
warnings << message
else
target.write(message)
end
self
end
# Use warning filter during block execution
#
# @return [Array<String>]
def self.use
original = $stderr
$stderr = filter = new(original)
yield
filter.warnings
ensure
$stderr = original
end
end # WarningFilter
end # Mutant
Version data entries
8 entries across 8 versions & 1 rubygems