about summary refs log tree commit diff stats
path: root/003trace.cc
blob: e874d04f8c41d79894ff89083015ae2237302efa (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
#!/usr/bin/python -O
# ranger - a vim-inspired file manager for the console  (coding: utf-8)
# Copyright (C) 2009, 2010, 2011  Roman Zimbelmann <romanz@lavabit.com>
# This software is distributed under the terms of the GNU GPL version 3.

# =====================
# This embedded bash script can be executed by sourcing this file.
# It will cd to ranger's last location after you exit it.
# The first argument specifies the command to run ranger, the
# default is simply "ranger". (Not this file itself!)
# The other arguments are passed to ranger.
"""":
tempfile='/tmp/chosendir'
ranger="${1:-ranger}"
test -z "$1" || shift
"$ranger" --choosedir="$tempfile" "${@:-$(pwd)}"
returnvalue=$?
test -f "$tempfile" &&
if [ "$(cat -- "$tempfile")" != "$(echo -n `pwd`)" ]; then
    cd "$(cat "$tempfile")"
    rm -f -- "$tempfile"
fi
return $returnvalue
""" and None

import sys
from os.path import exists, abspath

# Need to find out whether or not the flag --clean was used ASAP,
# because --clean is supposed to disable bytecode compilation
argv = sys.argv[1:sys.argv.index('--')] if '--' in sys.argv else sys.argv[1:]
sys.dont_write_bytecode = '-c' in argv or '--clean' in argv

# Don't import ./ranger when running an installed binary at /usr/.../ranger
if __file__[:4] == '/usr' and exists('ranger') and abspath('.') in sys.path:
    sys.path.remove(abspath('.'))

# Start ranger
import ranger
sys.exit(ranger.main())
'#n340'>340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400
//: The goal of this skeleton is to make programs more easy to understand and
//: more malleable, easy to rewrite in radical ways without accidentally
//: breaking some corner case. Tests further both goals. They help
//: understandability by letting one make small changes and get feedback. What
//: if I wrote this line like so? What if I removed this function call, is it
//: really necessary? Just try it, see if the tests pass. Want to explore
//: rewriting this bit in this way? Tests put many refactorings on a firmer
//: footing.
//:
//: But the usual way we write tests seems incomplete. Refactorings tend to
//: work in the small, but don't help with changes to function boundaries. If
//: you want to extract a new function you have to manually test-drive it to
//: create tests for it. If you want to inline a function its tests are no
//: longer valid. In both cases you end up having to reorganize code as well as
//: tests, an error-prone activity.
//:
//: This file tries to fix this problem by supporting domain-driven testing
//: We try to focus on the domain of inputs the program should work on. All
//: tests invoke the program in a single way: by calling run() with different
//: inputs. The program operates on the input and logs _facts_ it deduces to a
//: trace:
//:   trace("label") << "fact 1: " << val;
//:
//: The tests check for facts:
//:   :(scenario foo)
//:   34  # call run() with this input
//:   +label: fact 1: 34  # trace should have logged this at the end
//:   -label: fact 1: 35  # trace should never contain such a line
//:
//: Since we never call anything but the run() function directly, we never have
//: to rewrite the tests when we reorganize the internals of the program. We
//: just have to make sure our rewrite deduces the same facts about the domain,
//: and that's something we're going to have to do anyway.
//:
//: To avoid the combinatorial explosion of integration tests, we organize the
//: program into different layers, and each fact is logged to the trace with a
//: specific label. Individual tests can focus on specific labels. In essence,
//: validating the facts logged with a specific label is identical to calling
//: some internal subsystem.
//:
//: Traces interact salubriously with layers. Thanks to our ordering
//: directives, each layer can contain its own tests. They may rely on other
//: layers, but when a test fails its usually due to breakage in the same
//: layer. When multiple tests fail, it's usually useful to debug the very
//: first test to fail. This is in contrast with the traditional approach,
//: where changes can cause breakages in faraway subsystems, and picking the
//: right test to debug can be an important skill to pick up.
//:
//: To build robust tests, trace facts about your domain rather than details of
//: how you computed them.
//:
//: More details: http://akkartik.name/blog/tracing-tests
//:
//: ---
//:
//: Between layers and domain-driven testing, programming starts to look like a
//: fundamentally different activity. Instead of a) superficial, b) local rules
//: on c) code [like http://blog.bbv.ch/2013/06/05/clean-code-cheat-sheet],
//: we allow programmers to engage with the a) deep, b) global structure of the
//: c) domain. If you can systematically track discontinuities in the domain
//: you don't care if the code used gotos as long as it passed the tests. If
//: tests become more robust to run it becomes easier to try out radically
//: different implementations for the same program. If code is super-easy to
//: rewrite, it becomes less important what indentation style it uses, or that
//: the objects are appropriately encapsulated, or that the functions are
//: referentially transparent.
//:
//: Instead of plumbing, programming becomes building and gradually refining a
//: map of the environment the program must operate under. Whether a program is
//: 'correct' at a given point in time is a red herring; what matters is
//: avoiding regression by monotonically nailing down the more 'eventful' parts
//: of the terrain. It helps readers new and old and rewards curiosity to
//: organize large programs in self-similar hiearchies of example scenarios
//: colocated with the code that makes them work.
//:
//:   "Programming properly should be regarded as an activity by which
//:   programmers form a mental model, rather than as production of a program."
//:   -- Peter Naur (http://alistair.cockburn.us/ASD+book+extract%3A+%22Naur,+Ehn,+Musashi%22)

:(before "End Types")
struct trace_line {
  int depth;  // optional field just to help browse traces later
  string label;
  string contents;
  trace_line(string l, string c) :depth(0), label(l), contents(c) {}
  trace_line(int d, string l, string c) :depth(d), label(l), contents(c) {}
};

:(before "End Globals")
bool Hide_errors = false;
bool Dump_trace = false;
:(before "End Setup")
Hide_errors = false;
Dump_trace = false;

:(before "End Types")
// Pre-define some global constants that trace_stream needs to know about.
// Since they're in the Types section, they'll be included in any cleaved
// compilation units. So no extern linkage.
const int Max_depth = 9999;
const int Error_depth = 0;  // definitely always print errors
const int App_depth = 2;  // temporarily where all Mu code will trace to

struct trace_stream {
  vector<trace_line> past_lines;
  // accumulator for current line
  ostringstream* curr_stream;
  string curr_label;
  int curr_depth;
  int callstack_depth;
  int collect_depth;
  ofstream null_stream;  // never opens a file, so writes silently fail
  trace_stream() :curr_stream(NULL), curr_depth(Max_depth), callstack_depth(0), collect_depth(Max_depth) {}
  ~trace_stream() { if (curr_stream) delete curr_stream; }

  ostream& stream(string label) {
    return stream(Max_depth, label);
  }

  ostream& stream(int depth, string label) {
    if (depth > collect_depth) return null_stream;
    curr_stream = new ostringstream;
    curr_label = label;
    curr_depth = depth;
    return *curr_stream;
  }

  // be sure to call this before messing with curr_stream or curr_label
  void newline();
  // useful for debugging
  string readable_contents(string label);  // empty label = show everything
};

:(code)
void trace_stream::newline() {
  if (!curr_stream) return;
  string curr_contents = curr_stream->str();
  if (!curr_contents.empty()) {
    past_lines.push_back(trace_line(curr_depth, trim(curr_label), curr_contents));  // preserve indent in contents
    if (Dump_trace || (!Hide_errors && curr_label == "error"))
      cerr << curr_label << ": " << curr_contents << '\n';
  }
  delete curr_stream;
  curr_stream = NULL;
  curr_label.clear();
  curr_depth = Max_depth;
}

string trace_stream::readable_contents(string label) {
  ostringstream output;
  label = trim(label);
  for (vector<trace_line>::iterator p = past_lines.begin();  p != past_lines.end();  ++p)
    if (label.empty() || label == p->label) {
      output << std::setw(4) << p->depth << ' ' << p->label << ": " << p->contents << '\n';
    }
  return output.str();
}

:(before "End Globals")
trace_stream* Trace_stream = NULL;
int Trace_errors = 0;  // used only when Trace_stream is NULL

:(before "End Includes")
#define CLEAR_TRACE  delete Trace_stream, Trace_stream = new trace_stream;

// Top-level helper. IMPORTANT: can't nest
#define trace(...)  !Trace_stream ? cerr /*print nothing*/ : Trace_stream->stream(__VA_ARGS__)

// Just for debugging; 'git log' should never show any calls to 'dbg'.
#define dbg trace(0, "a")
#define DUMP(label)  if (Trace_stream) cerr << Trace_stream->readable_contents(label);

// Errors are a special layer.
#define raise  (!Trace_stream ? (tb_shutdown(),++Trace_errors,cerr) /*do print*/ : Trace_stream->stream(Error_depth, "error"))

// Inside tests, fail any tests that displayed (unexpected) errors.
// Expected errors in tests should always be hidden and silently checked for.
:(before "End Test Teardown")
if (Passed && !Hide_errors && trace_count("error") > 0) {
  Passed = false;
}

:(before "End Types")
struct end {};
:(code)
ostream& operator<<(ostream& os, unused end) {
  if (Trace_stream) Trace_stream->newline();
  return os;
}

:(before "End Globals")
bool Save_trace = false;

// Trace_stream is a resource, lease_tracer uses RAII to manage it.
:(before "End Types")
struct lease_tracer {
  lease_tracer();
  ~lease_tracer();
};
:(code)
lease_tracer::lease_tracer() { Trace_stream = new trace_stream; }
lease_tracer::~lease_tracer() {
  if (!Trace_stream) return;  // in case tests close Trace_stream
  if (Save_trace) {
    ofstream fout("last_trace");
    fout << Trace_stream->readable_contents("");
    fout.close();
  }
  delete Trace_stream, Trace_stream = NULL;
}
:(before "End Includes")
#define START_TRACING_UNTIL_END_OF_SCOPE  lease_tracer leased_tracer;
:(before "End Test Setup")
START_TRACING_UNTIL_END_OF_SCOPE

:(before "End Includes")
#define CHECK_TRACE_CONTENTS(...)  check_trace_contents(__FUNCTION__, __FILE__, __LINE__, __VA_ARGS__)

#define CHECK_TRACE_CONTAINS_ERROR()  CHECK(trace_count("error") > 0)
#define CHECK_TRACE_DOESNT_CONTAIN_ERROR() \
  if (Passed && trace_count("error") > 0) { \
    cerr << "\nF - " << __FUNCTION__ << "(" << __FILE__ << ":" << __LINE__ << "): unexpected errors\n"; \
    DUMP("error"); \
    Passed = false; \
    return; \
  }

#define CHECK_TRACE_COUNT(label, count) \
  if (Passed && trace_count(label) != (count)) { \
    cerr << "\nF - " << __FUNCTION__ << "(" << __FILE__ << ":" << __LINE__ << "): trace_count of " << label << " should be " << count << '\n'; \
    cerr << "  got " << trace_count(label) << '\n';  /* multiple eval */ \
    DUMP(label); \
    Passed = false; \
    return;  /* Currently we stop at the very first failure. */ \
  }

#define CHECK_TRACE_DOESNT_CONTAIN(...)  CHECK(trace_doesnt_contain(__VA_ARGS__))

:(code)
bool check_trace_contents(string FUNCTION, string FILE, int LINE, string expected) {
  if (!Passed) return false;
  if (!Trace_stream) return false;
  vector<string> expected_lines = split(expected, "");
  int curr_expected_line = 0;
  while (curr_expected_line < SIZE(expected_lines) && expected_lines.at(curr_expected_line).empty())
    ++curr_expected_line;
  if (curr_expected_line == SIZE(expected_lines)) return true;
  string label, contents;
  split_label_contents(expected_lines.at(curr_expected_line), &label, &contents);
  for (vector<trace_line>::iterator p = Trace_stream->past_lines.begin();  p != Trace_stream->past_lines.end();  ++p) {
    if (label != p->label) continue;
    if (contents != trim(p->contents)) continue;
    ++curr_expected_line;
    while (curr_expected_line < SIZE(expected_lines) && expected_lines.at(curr_expected_line).empty())
      ++curr_expected_line;
    if (curr_expected_line == SIZE(expected_lines)) return true;
    split_label_contents(expected_lines.at(curr_expected_line), &label, &contents);
  }

  if (line_exists_anywhere(label, contents)) {
    cerr << "\nF - " << FUNCTION << "(" << FILE << ":" << LINE << "): line [" << label << ": " << contents << "] out of order in trace:\n";
    DUMP("");
  }
  else {
    cerr << "\nF - " << FUNCTION << "(" << FILE << ":" << LINE << "): missing [" << contents << "] in trace:\n";
    DUMP(label);
  }
  Passed = false;
  return false;
}

void split_label_contents(const string& s, string* label, string* contents) {
  static const string delim(": ");
  size_t pos = s.find(delim);
  if (pos == string::npos) {
    *label = "";
    *contents = trim(s);
  }
  else {
    *label = trim(s.substr(0, pos));
    *contents = trim(s.substr(pos+SIZE(delim)));
  }
}

bool line_exists_anywhere(const string& label, const string& contents) {
  for (vector<trace_line>::iterator p = Trace_stream->past_lines.begin();  p != Trace_stream->past_lines.end();  ++p) {
    if (label != p->label) continue;
    if (contents == trim(p->contents)) return true;
  }
  return false;
}

int trace_count(string label) {
  return trace_count(label, "");
}

int trace_count(string label, string line) {
  if (!Trace_stream) return 0;
  long result = 0;
  for (vector<trace_line>::iterator p = Trace_stream->past_lines.begin();  p != Trace_stream->past_lines.end();  ++p) {
    if (label == p->label) {
      if (line == "" || trim(line) == trim(p->contents))
        ++result;
    }
  }
  return result;
}

int trace_count_prefix(string label, string prefix) {
  if (!Trace_stream) return 0;
  long result = 0;
  for (vector<trace_line>::iterator p = Trace_stream->past_lines.begin();  p != Trace_stream->past_lines.end();  ++p) {
    if (label == p->label) {
      if (starts_with(trim(p->contents), trim(prefix)))
        ++result;
    }
  }
  return result;
}

bool trace_doesnt_contain(string label, string line) {
  return trace_count(label, line) == 0;
}

bool trace_doesnt_contain(string expected) {
  vector<string> tmp = split_first(expected, ": ");
  return trace_doesnt_contain(tmp.at(0), tmp.at(1));
}

vector<string> split(string s, string delim) {
  vector<string> result;
  size_t begin=0, end=s.find(delim);
  while (true) {
    if (end == string::npos) {
      result.push_back(string(s, begin, string::npos));
      break;
    }
    result.push_back(string(s, begin, end-begin));
    begin = end+SIZE(delim);
    end = s.find(delim, begin);
  }
  return result;
}

vector<string> split_first(string s, string delim) {
  vector<string> result;
  size_t end=s.find(delim);
  result.push_back(string(s, 0, end));
  if (end != string::npos)
    result.push_back(string(s, end+SIZE(delim), string::npos));
  return result;
}

string trim(const string& s) {
  string::const_iterator first = s.begin();
  while (first != s.end() && isspace(*first))
    ++first;
  if (first == s.end()) return "";

  string::const_iterator last = --s.end();
  while (last != s.begin() && isspace(*last))
    --last;
  ++last;
  return string(first, last);
}

:(before "End Includes")
#include <vector>
using std::vector;
#include <list>
using std::list;
#include <map>
using std::map;
#include <set>
using std::set;
#include <algorithm>

#include <sstream>
using std::istringstream;
using std::ostringstream;

#include <fstream>
using std::ifstream;
using std::ofstream;

#include "termbox/termbox.h"

:(before "End Globals")
//: In future layers we'll use the depth field as follows:
//:
//: Errors will be depth 0.
//: Mu 'applications' will be able to use depths 1-100 as they like.
//: Primitive statements will occupy 101-9989
extern const int Initial_callstack_depth = 101;
extern const int Max_callstack_depth = 9989;
//: Finally, details of primitive Mu statements will occupy depth 9990-9999
//: (more on that later as well)
//:
//: This framework should help us hide some details at each level, mixing
//: static ideas like layers with the dynamic notion of call-stack depth.