Re: [Caml-list] ANN: exn-source - exception backtraces with source code printing

[Gabriel Scherer <gabriel.scherer@gmail.com>]

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exn-source produces an output using ANSI escape codes. Here is a text
version (ansifilter --text):
  http://gallium.inria.fr/~scherer/tmp/tmp/exnsource-example.text
and a HTML version
  http://gallium.inria.fr/~scherer/tmp/tmp/exnsource-example.html

To (re)produce this output I ran the command
  OCAMLRUNPARAM="b" ./cpdf -debug foo.pdf
from the the tag v1.7 of the repo
  https://github.com/johnwhitington/cpdf-source/
(after installing both camlpdf (from OPAM) and exnsource (from github))
with the following patch applied:

diff --git a/Makefile b/Makefile
index d706771..c4f9523 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ SOURCES = $(foreach x,$(MODS),$(x).ml $(x).mli)
cpdfcommandrun.ml

 RESULT = cpdf

-PACKS = camlpdf
+PACKS = camlpdf exnsource

 OCAMLNCFLAGS = -g
 OCAMLBCFLAGS = -g
diff --git a/cpdfcommandrun.ml b/cpdfcommandrun.ml
index 2a43a43..bb0af72 100644
--- a/cpdfcommandrun.ml
+++ b/cpdfcommandrun.ml
@@ -1,2 +1,4 @@
+let _ = Exnsource.add_dir ""
+
 let _ = Cpdfcommand.go ()



On Thu, Oct 23, 2014 at 1:48 PM, Sébastien Hinderer <
Sebastien.Hinderer@inria.fr> wrote:

> Hi,
>
> John Whitington (2014/10/23 09:32 +0100):
> > Hi,
> >
> > John Whitington wrote:
> > >Hi,
> > >
> > >OCaml 4.02 has new facilities for installing a new backtrace handler,
> > >and processing the back trace symbolically. As a little proof of
> > >concept, I've built a package which you can add to any project to get
> > >backtrace with source code printed and highlighted:
> > >
> > >https://github.com/johnwhitington/exn-source
>
> This seems very interesting, thanks!
>
> > >Here's the start of a backtrace:
> > >
> > >http://www.coherentpdf.com/exnsource.png
>
> Just wanted to mention that not everybody can look at pictures, so it
> would be great to show the text itself whenever it'spossible.
>
> Thanks,
> Sébastien.
>
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