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Versions: 15
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Contents
module DslExceptionHandling
#prevent very confusing method_missing calls during debugging by
#only writing to the object when expected
def write_mode
@write_mode = true
yield
@write_mode = false
end
def eval_with_exceptions &block
write_mode do
begin
instance_eval(&block)
rescue Exception => e
#don't swallow exceptions further down the tree
raise e if e.is_a? Geoff::DslSyntaxError
lines = caller.select{|c| (c !~ /geoff\/lib\/geoff/)and (c !~ /ruby-debug/) }
file, number, method = lines.first.split ":"
message = "Syntax Error in #{method} in Geoff DSL block for:\n#{file}:#{number}\n"
message << lines_around(file, number) do |m|
"\n\n#{e.message}\n\n"
end
raise Geoff::DslSyntaxError, message
end
end
end
def lines_around file, number, context = 10
number = number.to_i
range = (number - context) .. (number + context)
lines = File.read(file).split("\n")
filtered_lines = range.inject({}) do |l, i|
l[i] = lines[i]
l
end
filtered_lines.map do |line_number, line|
if line_number == number
yield + ">#{line_number} #{line}"
else
" #{line_number} #{line}"
end
end.join "\n"
end
end
Version data entries
15 entries across 15 versions & 1 rubygems