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shard-backtracer.cr
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Rename Line -> Frame 

Also,

Line#number -> Frame#lineno
This commit is contained in:
Sijawusz Pur Rahnama 2020-12-28 17:52:41 +01:00
parent f0870daef4
commit 1fe6177e0d
8 changed files with 262 additions and 231 deletions
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227
spec/backtracer/backtrace/frame_spec.cr Normal file
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@ -0,0 +1,227 @@
require "../../spec_helper"
private def parse_frame(line)
Backtracer::Backtrace::Frame::Parser.parse(line)
end
private def with_frame(method, path = nil, lineno = nil, column = nil)
line = String.build do |io|
if path
io << path
io << ':' << lineno if lineno
io << ':' << column if column
io << " in '" << method << '\''
else
io << method
end
end
yield parse_frame(line)
end
private def with_foo_frame(
method = "foo_bar?",
path = "#{__DIR__}/foo.cr",
lineno = 1,
column = 7
)
with_frame(method, path, lineno, column) do |frame|
yield frame
end
end
describe Backtracer::Backtrace::Frame do
describe ".parse" do
it "fails to parse an empty string" do
expect_raises(ArgumentError) { parse_frame("") }
end
context "when --no-debug flag is set" do
it "parses frame with any value as method" do
backtrace_line = "__crystal_main"
with_frame(backtrace_line) do |frame|
frame.lineno.should be_nil
frame.column.should be_nil
frame.method.should eq(backtrace_line)
frame.file.should be_nil
frame.relative_path.should be_nil
frame.under_src_path?.should be_false
frame.shard_name.should be_nil
frame.in_app?.should be_false
end
end
end
context "with ~proc signature" do
it "parses absolute path outside of src/ dir" do
backtrace_line = "~proc2Proc(Fiber, (IO::FileDescriptor | Nil))@/usr/local/Cellar/crystal/0.27.2/src/fiber.cr:72"
with_frame(backtrace_line) do |frame|
frame.lineno.should eq(72)
frame.column.should be_nil
frame.method.should eq("~proc2Proc(Fiber, (IO::FileDescriptor | Nil))")
frame.file.should eq("/usr/local/Cellar/crystal/0.27.2/src/fiber.cr")
frame.relative_path.should be_nil
frame.under_src_path?.should be_false
frame.shard_name.should be_nil
frame.in_app?.should be_false
end
end
it "parses relative path inside of lib/ dir" do
backtrace_line = "~procProc(HTTP::Server::Context, String)@lib/kemal/src/kemal/route.cr:11"
with_frame(backtrace_line) do |frame|
frame.lineno.should eq(11)
frame.column.should be_nil
frame.method.should eq("~procProc(HTTP::Server::Context, String)")
frame.file.should eq("lib/kemal/src/kemal/route.cr")
frame.relative_path.should eq("lib/kemal/src/kemal/route.cr")
frame.under_src_path?.should be_false
frame.shard_name.should eq("kemal")
frame.in_app?.should be_false
end
end
end
it "parses absolute path outside of configuration.src_path" do
path = "/some/absolute/path/to/foo.cr"
with_foo_frame(path: path) do |frame|
frame.lineno.should eq(1)
frame.column.should eq(7)
frame.method.should eq("foo_bar?")
frame.file.should eq(path)
frame.relative_path.should be_nil
frame.under_src_path?.should be_false
frame.shard_name.should be_nil
frame.in_app?.should be_false
end
end
context "with in_app? = false" do
it "parses absolute path outside of src/ dir" do
with_foo_frame do |frame|
frame.lineno.should eq(1)
frame.column.should eq(7)
frame.method.should eq("foo_bar?")
frame.file.should eq("#{__DIR__}/foo.cr")
frame.relative_path.should eq("spec/backtracer/backtrace/foo.cr")
frame.under_src_path?.should be_true
frame.shard_name.should be_nil
frame.in_app?.should be_false
end
end
it "parses relative path outside of src/ dir" do
path = "some/relative/path/to/foo.cr"
with_foo_frame(path: path) do |frame|
frame.lineno.should eq(1)
frame.column.should eq(7)
frame.method.should eq("foo_bar?")
frame.file.should eq(path)
frame.relative_path.should eq(path)
frame.under_src_path?.should be_false
frame.shard_name.should be_nil
frame.in_app?.should be_false
end
end
end
context "with in_app? = true" do
it "parses absolute path inside of src/ dir" do
src_path = File.expand_path("../../../src", __DIR__)
path = "#{src_path}/foo.cr"
with_foo_frame(path: path) do |frame|
frame.lineno.should eq(1)
frame.column.should eq(7)
frame.method.should eq("foo_bar?")
frame.file.should eq(path)
frame.relative_path.should eq("src/foo.cr")
frame.under_src_path?.should be_true
frame.shard_name.should be_nil
frame.in_app?.should be_true
end
end
it "parses relative path inside of src/ dir" do
path = "src/foo.cr"
with_foo_frame(path: path) do |frame|
frame.lineno.should eq(1)
frame.column.should eq(7)
frame.method.should eq("foo_bar?")
frame.file.should eq(path)
frame.relative_path.should eq(path)
frame.under_src_path?.should be_false
frame.shard_name.should be_nil
frame.in_app?.should be_true
end
end
end
context "with shard path" do
it "parses absolute path inside of lib/ dir" do
lib_path = File.expand_path("../../../lib/bar", __DIR__)
path = "#{lib_path}/src/bar.cr"
with_foo_frame(path: path) do |frame|
frame.lineno.should eq(1)
frame.column.should eq(7)
frame.method.should eq("foo_bar?")
frame.file.should eq(path)
frame.relative_path.should eq("lib/bar/src/bar.cr")
frame.under_src_path?.should be_true
frame.shard_name.should eq "bar"
frame.in_app?.should be_false
end
end
it "parses relative path inside of lib/ dir" do
path = "lib/bar/src/bar.cr"
with_foo_frame(path: path) do |frame|
frame.lineno.should eq(1)
frame.column.should eq(7)
frame.method.should eq("foo_bar?")
frame.file.should eq(path)
frame.relative_path.should eq(path)
frame.under_src_path?.should be_false
frame.shard_name.should eq "bar"
frame.in_app?.should be_false
end
end
it "uses only folders for shard names" do
with_foo_frame(path: "lib/bar.cr") do |frame|
frame.shard_name.should be_nil
end
end
end
end
it "#inspect" do
with_foo_frame do |frame|
frame.inspect.should match(/Backtrace::Frame(.*)$/)
end
end
it "#to_s" do
with_foo_frame do |frame|
frame.to_s.should eq "`foo_bar?` at #{__DIR__}/foo.cr:1:7"
end
end
it "#==" do
with_foo_frame do |frame|
with_foo_frame do |frame2|
frame.should eq(frame2)
end
with_foo_frame(method: "other_method") do |frame2|
frame.should_not eq(frame2)
end
end
end
end

199
spec/backtracer/backtrace/line_spec.cr
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@ -1,199 +0,0 @@
require "../../spec_helper"
private def with_line(
path = "#{__DIR__}/foo.cr",
method = "foo_bar?",
line = 1,
column = 7
)
line = "#{path}#{line && ":#{line}"}#{column && ":#{column}"} in '#{method}'"
yield Backtracer::Backtrace::Line::Parser.parse(line)
end
describe Backtracer::Backtrace::Line do
describe ".parse" do
it "fails to parse an empty string" do
expect_raises(ArgumentError) { Backtracer::Backtrace::Line::Parser.parse("") }
end
context "when --no-debug flag is set" do
it "parses line with any value as method" do
backtrace_line = "__crystal_main"
line = Backtracer::Backtrace::Line::Parser.parse(backtrace_line)
line.number.should be_nil
line.column.should be_nil
line.method.should eq(backtrace_line)
line.file.should be_nil
line.relative_path.should be_nil
line.under_src_path?.should be_false
line.shard_name.should be_nil
line.in_app?.should be_false
end
end
context "with ~proc signature" do
it "parses absolute path outside of src/ dir" do
backtrace_line = "~proc2Proc(Fiber, (IO::FileDescriptor | Nil))@/usr/local/Cellar/crystal/0.27.2/src/fiber.cr:72"
line = Backtracer::Backtrace::Line::Parser.parse(backtrace_line)
line.number.should eq(72)
line.column.should be_nil
line.method.should eq("~proc2Proc(Fiber, (IO::FileDescriptor | Nil))")
line.file.should eq("/usr/local/Cellar/crystal/0.27.2/src/fiber.cr")
line.relative_path.should be_nil
line.under_src_path?.should be_false
line.shard_name.should be_nil
line.in_app?.should be_false
end
it "parses relative path inside of lib/ dir" do
backtrace_line = "~procProc(HTTP::Server::Context, String)@lib/kemal/src/kemal/route.cr:11"
line = Backtracer::Backtrace::Line::Parser.parse(backtrace_line)
line.number.should eq(11)
line.column.should be_nil
line.method.should eq("~procProc(HTTP::Server::Context, String)")
line.file.should eq("lib/kemal/src/kemal/route.cr")
line.relative_path.should eq("lib/kemal/src/kemal/route.cr")
line.under_src_path?.should be_false
line.shard_name.should eq("kemal")
line.in_app?.should be_false
end
end
it "parses absolute path outside of configuration.src_path" do
path = "/some/absolute/path/to/foo.cr"
with_line(path: path) do |line|
line.number.should eq(1)
line.column.should eq(7)
line.method.should eq("foo_bar?")
line.file.should eq(path)
line.relative_path.should be_nil
line.under_src_path?.should be_false
line.shard_name.should be_nil
line.in_app?.should be_false
end
end
context "with in_app? = false" do
it "parses absolute path outside of src/ dir" do
with_line do |line|
line.number.should eq(1)
line.column.should eq(7)
line.method.should eq("foo_bar?")
line.file.should eq("#{__DIR__}/foo.cr")
line.relative_path.should eq("spec/backtracer/backtrace/foo.cr")
line.under_src_path?.should be_true
line.shard_name.should be_nil
line.in_app?.should be_false
end
end
it "parses relative path outside of src/ dir" do
path = "some/relative/path/to/foo.cr"
with_line(path: path) do |line|
line.number.should eq(1)
line.column.should eq(7)
line.method.should eq("foo_bar?")
line.file.should eq(path)
line.relative_path.should eq(path)
line.under_src_path?.should be_false
line.shard_name.should be_nil
line.in_app?.should be_false
end
end
end
context "with in_app? = true" do
it "parses absolute path inside of src/ dir" do
src_path = File.expand_path("../../../src", __DIR__)
path = "#{src_path}/foo.cr"
with_line(path: path) do |line|
line.number.should eq(1)
line.column.should eq(7)
line.method.should eq("foo_bar?")
line.file.should eq(path)
line.relative_path.should eq("src/foo.cr")
line.under_src_path?.should be_true
line.shard_name.should be_nil
line.in_app?.should be_true
end
end
it "parses relative path inside of src/ dir" do
path = "src/foo.cr"
with_line(path: path) do |line|
line.number.should eq(1)
line.column.should eq(7)
line.method.should eq("foo_bar?")
line.file.should eq(path)
line.relative_path.should eq(path)
line.under_src_path?.should be_false
line.shard_name.should be_nil
line.in_app?.should be_true
end
end
end
context "with shard path" do
it "parses absolute path inside of lib/ dir" do
lib_path = File.expand_path("../../../lib/bar", __DIR__)
path = "#{lib_path}/src/bar.cr"
with_line(path: path) do |line|
line.number.should eq(1)
line.column.should eq(7)
line.method.should eq("foo_bar?")
line.file.should eq(path)
line.relative_path.should eq("lib/bar/src/bar.cr")
line.under_src_path?.should be_true
line.shard_name.should eq "bar"
line.in_app?.should be_false
end
end
it "parses relative path inside of lib/ dir" do
path = "lib/bar/src/bar.cr"
with_line(path: path) do |line|
line.number.should eq(1)
line.column.should eq(7)
line.method.should eq("foo_bar?")
line.file.should eq(path)
line.relative_path.should eq(path)
line.under_src_path?.should be_false
line.shard_name.should eq "bar"
line.in_app?.should be_false
end
end
it "uses only folders for shard names" do
with_line(path: "lib/bar.cr") do |line|
line.shard_name.should be_nil
end
end
end
end
it "#inspect" do
with_line do |line|
line.inspect.should match(/Backtrace::Line(.*)$/)
end
end
it "#to_s" do
with_line do |line|
line.to_s.should eq "`foo_bar?` at #{__DIR__}/foo.cr:1:7"
end
end
it "#==" do
with_line do |line|
with_line do |line2|
line.should eq(line2)
end
with_line(method: "other_method") do |line2|
line.should_not eq(line2)
end
end
end
end

6
spec/backtracer/backtrace_spec.cr
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@ -3,8 +3,8 @@ require "../spec_helper"
describe Backtracer::Backtrace do
backtrace = Backtracer.parse(caller)
it "#lines" do
backtrace.lines.should be_a(Array(Backtracer::Backtrace::Line))
it "#frames" do
backtrace.frames.should be_a(Array(Backtracer::Backtrace::Frame))
end
it "#inspect" do
@ -18,7 +18,7 @@ describe Backtracer::Backtrace do
{% end %}
it "#==" do
backtrace2 = Backtracer::Backtrace.new(backtrace.lines)
backtrace2 = Backtracer::Backtrace.new(backtrace.frames)
backtrace2.should eq(backtrace)
end
end

10
src/backtracer/backtrace.cr
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@ -1,19 +1,19 @@
module Backtracer
class Backtrace
getter lines : Array(Line)
getter frames : Array(Frame)
def initialize(@lines = [] of Line)
def initialize(@frames = [] of Frame)
end
def_equals_and_hash @lines
def_equals_and_hash @frames
def to_s(io : IO) : Nil
@lines.join(io, '\n')
@frames.join(io, '\n')
end
def inspect(io : IO) : Nil
io << "#<Backtrace: "
@lines.join(io, ", ", &.inspect(io))
@frames.join(io, ", ", &.inspect(io))
io << '>'
end
end

28
src/backtracer/backtrace/line.cr → src/backtracer/backtrace/frame.cr
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@ -1,38 +1,38 @@
module Backtracer
# Handles backtrace parsing line by line
struct Backtrace::Line
# The method of the line (such as `User.find`).
# An object representation of a stack frame.
struct Backtrace::Frame
# The method of the frame (such as `User.find`).
getter method : String
# The file portion of the line (such as `app/models/user.cr`).
# The file portion of the frame (such as `app/models/user.cr`).
getter file : String?
# The line number portion of the line.
getter number : Int32?
# The line number portion of the frame.
getter lineno : Int32?
# The column number portion of the line.
# The column number portion of the frame.
getter column : Int32?
protected getter(configuration) { Backtracer.configuration }
def initialize(@method, @file = nil, @number = nil, @column = nil, *,
def initialize(@method, @file = nil, @lineno = nil, @column = nil, *,
@configuration = nil)
end
def_equals_and_hash @method, @file, @number, @column
def_equals_and_hash @method, @file, @lineno, @column
# Reconstructs the line in a readable fashion
# Reconstructs the frame in a readable fashion
def to_s(io : IO) : Nil
io << '`' << @method << '`'
if @file
io << " at " << @file
io << ':' << @number if @number
io << ':' << @lineno if @lineno
io << ':' << @column if @column
end
end
def inspect(io : IO) : Nil
io << "Backtrace::Line("
io << "Backtrace::Frame("
to_s(io)
io << ')'
end
@ -73,7 +73,7 @@ module Backtracer
context_lines ||= configuration.context_lines
return unless context_lines && (context_lines > 0)
return unless (lineno = @number) && (lineno > 0)
return unless (lineno = @lineno) && (lineno > 0)
return unless (filename = @file) && File.readable?(filename)
lines = File.read_lines(filename)
@ -88,7 +88,7 @@ module Backtracer
def context_hash(context_lines : Int32? = nil) : Hash(Int32, String)?
return unless context = self.context(context_lines)
return unless lineno = self.number
return unless lineno = self.lineno
pre_context, context_line, post_context = context

12
src/backtracer/backtrace/line/parser.cr → src/backtracer/backtrace/frame/parser.cr
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@ -1,26 +1,26 @@
module Backtracer
module Backtrace::Line::Parser
module Backtrace::Frame::Parser
extend self
# Parses a single line of a given backtrace, where *unparsed_line* is
# the raw line from `caller` or some backtrace.
#
# Returns the parsed backtrace line on success or `nil` otherwise.
def parse?(line : String, **options) : Backtrace::Line?
# Returns the parsed backtrace frame on success or `nil` otherwise.
def parse?(line : String, **options) : Backtrace::Frame?
return unless Configuration::LINE_PATTERNS.any? &.match(line)
method = $~["method"]?.presence
file = $~["file"]?.presence
number = $~["line"]?.try(&.to_i?)
lineno = $~["line"]?.try(&.to_i?)
column = $~["col"]?.try(&.to_i?)
return unless method
Backtrace::Line.new method, file, number, column,
Backtrace::Frame.new method, file, lineno, column,
configuration: options[:configuration]?
end
def parse(line : String, **options) : Backtrace::Line
def parse(line : String, **options) : Backtrace::Frame
parse?(line, **options) ||
raise ArgumentError.new("Error parsing line: #{line.inspect}")
end

9
src/backtracer/backtrace/parser.cr
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@ -11,13 +11,16 @@ module Backtracer
end
lines = backtrace.compact_map do |line|
line = filters.reduce(line) do |nested_line, filter|
filters.reduce(line) do |nested_line, filter|
filter.call(nested_line) || break
end
Line::Parser.parse(line, configuration: configuration) if line
end
Backtrace.new(lines)
frames = lines.map do |line|
Frame::Parser.parse(line, configuration: configuration)
end
Backtrace.new(frames)
end
def parse(backtrace : String, **options) : Backtrace

2
src/backtracer/configuration.cr
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@ -61,7 +61,7 @@ module Backtracer
# to set this to something like `/(src|engines)/`
property app_dirs_pattern = /src/
# `Regex` pattern matched against `Backtrace::Line#file`.
# `Regex` pattern matched against `Backtrace::Frame#file`.
property in_app_pattern : Regex { /^(#{src_path}\/)?(#{app_dirs_pattern})/ }
# Path pattern matching directories to be recognized as your app modules.