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# File 'lib/ruby_codex.rb', line 8
def initialize(db,agg_db)
@nodes = {}
info = Proc.new do |node|
normal_node(node) do |n, norm|
norm.pretty_complexity.map { |k,v| v }.reduce(:+)
end
end
func_info = Proc.new do |node|
normal_node(node) do |n, norm|
norm.pretty_complexity[:send] || 0
end
end
type = Proc.new { |node| node.is_a?(AST::Node) ? node.type.to_s : node.class.to_s }
func_name = Proc.new do |node|
if type.call(node.children.first) == "const"
node.children.first.children[1].to_s + "." + node.children[1].to_s
else
node.children[1].to_s
end
end
key = {
:type => type,
:info => info,
:func_info => func_info
}
data_core = {
:file => Proc.new { |node, f, p| f },
:project => Proc.new { |node, f, p| p },
:line => Proc.new { |node, f, p| node.loc ? node.loc.line : nil },
:orig_code => Proc.new { |node, f, p| Unparser.unparse(node) rescue nil },
}
combine = {
:files => Proc.new { |v| v.map { |x| x[:file] }.uniq },
:file_count => Proc.new { |v| v.map { |x| x[:file] }.uniq.count },
:projects => Proc.new { |v| v.map { |x| x[:project] }.uniq },
:project_count => Proc.new { |v| v.map { |x| x[:project] }.uniq.count },
:orig_code => Proc.new { |v| v.sample(10).map do |x|
{:code => x[:orig_code], :file => x[:file], :line => x[:line]}
end.uniq },
:count => Proc.new { |v| v.map { |x| x[:orig_code] }.count },
}
@nodes[:block] = DataNode.new(
db, agg_db,
Proc.new { |x| x.type == :block},
key.merge({
:func => Proc.new { |x| func_name.call(x.children.first) },
:body => Proc.new { |x| normalize_nodes(x.children.last) },
:arg_size => Proc.new { |x| x.children[1].children.size },
:info => Proc.new { |x| info.call(block_without_caller(x)) },
:func_info => Proc.new { |x| func_info.call(block_without_caller(x)) },
:ret_val => Proc.new do |x|
body = x.children.last
ret = type.call(body) == "begin" ? body.children.last : body
typ = type.call(ret)
typ == "send" ? func_name.call(ret) : typ
end,
:norm_code => Proc.new do |x|
normal_node(x) { |x| Unparser.unparse(block_without_caller(x)) rescue nil }
end
}),
data_core.merge({
:args => Proc.new { |x| x.children[1].children.map{ |y| y.children[0].to_s }}
}),
combine.merge({
:args_list => Proc.new { |v| v.map { |x| x[:args] } }
}),
Proc.new { |db,keys,vals|
query = db.where(:type => keys[:type], :func => keys[:func], :ret_val => keys[:ret_val]).first
query_count = query.nil? ? 0 : query.count
blocks = db.where(:type => keys[:type], :func => keys[:func]).sum(:count)
rets = db.where(:type => keys[:type], :ret_val => keys[:ret_val]).sum(:count)
{ :keys => keys,
:message =>
"We've seen #{keys[:func]} blocks returning the #{keys[:ret_val]} type #{query_count.to_s} " +
"times, and we've seen #{keys[:func]} blocks #{blocks.to_s} times and #{keys[:ret_val]} " +
"returned #{rets.to_s} times.",
:unlikely => Proc.new { |gt=1,bt = 5,rt = 5| query_count < gt && blocks > bt && rets > rt}
}
}
)
@nodes[:func] = DataNode.new(
db, agg_db,
Proc.new { |x| x.type == :send},
key.merge({
:func => Proc.new { |x| func_name.call(x) },
:norm_code => Proc.new { |x| normal_node(x) { |x| Unparser.unparse(without_caller(x)) rescue nil } },
:sig => Proc.new { |x| x.children.drop(2).map { |y| type.call(y) } },
:info => Proc.new { |x| info.call(without_caller(x)) },
:func_info => Proc.new { |x| func_info.call(without_caller(x)) }
}),
data_core,
combine,
Proc.new { |db,keys,values|
if keys[:norm_code] != nil query = db.where(keys).first
query_count = query.nil? ? 0 : query.count
func = db.where(:type => keys[:type], :func => keys[:func]).sort(:count => -1).limit(1).first
alt_text =
if func
alt_count = func.count
"and the most common alternative #{func.norm_code} has appeared #{alt_count.to_s} times."
else
alt_count = 0
"and we've seen no known alternative."
end
{ :keys => keys,
:message =>
"Function call #{keys[:norm_code]} has appeared #{query_count.to_s} times, " +
alt_text,
:unlikely => Proc.new { |t=10| alt_count > t * (query_count + 1)}
}
else
{ :message => "Never Seen", :unlikely => Proc.new { false } }
end
}
)
@nodes[:func_chain] = DataNode.new(
db, agg_db,
Proc.new { |x| x.type == :send && type.call(x.children.first) == "send" },
key.merge({
:type => Proc.new { "func_chain" },
:f1 => Proc.new { |x| func_name.call(x) },
:f2 => Proc.new { |x| func_name.call(x.children.first) },
:info => Proc.new { 0 },
:func_info => Proc.new { 0 }
}),
data_core,
combine,
Proc.new do |db,keys,data|
query = db.where(keys).first
query_count = query.nil? ? 0 : query.count
fs = [:f1,:f2].map { |f| db.where(:type => "send", :func => keys[f]).size }
{ :keys => keys,
:message =>
"Function #{keys[:f1]} has appeared #{fs[0].to_s} times " +
"and #{keys[:f2]} has appeared #{fs[1].to_s} times, and " +
"they've appeared #{query_count} times together.",
:unlikely => Proc.new { |gt=1, t=10| query_count < gt && fs[0] > t && fs[1] > t }
}
end
)
@nodes[:cond] = DataNode.new(
db, agg_db,
Proc.new { |x| x.type == :if },
key.merge({
:norm_code => Proc.new { |x| normalize_nodes(x) },
:cond => Proc.new { |x| normal_node(x) { |n| Unparser.unparse(n.children.first) }},
:iftrue => Proc.new { |x| normal_node(x) { |n| Unparser.unparse(n.children[1]) }},
:iffalse => Proc.new { |x| normal_node(x) { |n| Unparser.unparse(n.children[2]) }},
}),
data_core,
combine
)
@nodes[:ident] = DataNode.new(
db, agg_db,
Proc.new { |x| [:lvasgn, :ivasgn, :cvasgn, :gvasgn].include?(x.type) },
key.merge({
:type => Proc.new { "ident" },
:ident => Proc.new { |x| x.children.first.to_s },
:info => Proc.new { 0 },
:func_info => Proc.new { 0 }
}),
data_core.merge({
:ident_type => Proc.new { |x| type.call(x.children[1]) rescue nil }
}),
combine.merge({
:ident_types => Proc.new { |v| v.group_by { |y| y[:ident_type] }.map_hash { |x| x.size } }
}),
Proc.new { |db, keys, data|
primatives = ["str","int","float","array","hash"]
query = db.where(keys).first
if query && primatives.include?(keys[:ident_type])
types = query.ident_types.select { |k,v| primatives.include? k }
types.default = 0
best = types.select { |k,v| k != data[:ident_type] }.sort_by{ |k,v| v*-1 }.first
best_str = best ? "#{best[1].to_s} times as #{best[0].to_s}" : "never as anything else."
{ :keys => keys,
:message =>
"The identifier #{keys[:ident]} has appeared #{types[data[:ident_type]].to_s} " +
"times as #{data[:ident_type].to_s} and #{best_str}",
:unlikely => Proc.new { |t=5| best ? best[1] > t * (types[keys[:ident_type]] + 1) : false }
}
else
{ :message => "Never Seen", :unlikely => Proc.new { false } }
end
}
)
end
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