Improve latex error bubble up

pytex/latex_error_parser.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+# encoding: utf-8
+
+"""
+Parsing latex error to bubble up import ones
+"""
+
+from functools import wraps
+
+def coroutine(func):
+    @wraps(func)
+    def start(*args, **kwargs):
+        cr = func(*args, **kwargs)
+        next(cr)
+        return cr
+    return start
+
+@coroutine
+def generic_sink(func):
+    """ Generic sink
+
+    :param function: function that define the end of the sink
+
+    >>> print_sink = generic_sink(print)
+    >>> print_sink.send("coucou")
+    coucou
+    """
+    while True:
+        c = (yield)
+        if c:
+            func(c)
+
+@coroutine
+def filter_errors(target):
+    """ Filter pdflatex log to bubble up error
+
+    https://en.wikibooks.org/wiki/LaTeX/Errors_and_Warnings
+    
+    >>> s = generic_sink(print)
+    >>> tex_filter = filter_errors(s)
+    >>> tex_filter.send("! Undefined control sequence.")
+    ! Undefined control sequence.
+    >>> tex_filter.send("l.43     \\includegraphics")
+    l.43     \\includegraphics
+    >>> tex_filter.send("l.43     \\includegraphics")
+    >>> 
+    """
+    while True:
+        line = (yield)
+        if line.startswith("!"):
+            target.send(line)
+            line = (yield)
+            while not line.startswith('See'):
+                target.send(line)
+                line = (yield)
+
+# -----------------------------
+# Reglages pour 'vim'
+# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
+# cursor: 16 del

pytex/pytex.py

@@ -11,8 +11,18 @@ import subprocess
 import random as rd
 from path import Path
 from .texenv import *
+from .latex_error_parser import generic_sink, filter_errors
 
+formatter = logging.Formatter('%(name)s :: %(levelname)s :: %(message)s')
+steam_handler = logging.StreamHandler()
+steam_handler.setLevel(logging.DEBUG)
+steam_handler.setFormatter(formatter)
+# création de l'objet logger qui va nous servir à écrire dans les logs
+# on met le niveau du logger à DEBUG, comme ça il écrit tout
 logger = logging.getLogger(__name__)
+logger.setLevel(logging.DEBUG)
+logger.addHandler(steam_handler)
+
 
 EXPORT_DICT = {}
 EXPORT_DICT.update(m.__dict__)
@@ -82,7 +92,7 @@ def pdflatex(latex_file, output_dir=""):
     compilation = subprocess.Popen(
         [
             "pdflatex",
-            # f"-output-directory={output_dir}",
+            f"-output-directory={output_dir}",
             # "-halt-on-error",
             "-interaction=nonstopmode",
             "-shell-escape",
@@ -93,9 +103,10 @@ def pdflatex(latex_file, output_dir=""):
         # shell=True
         )
 
+    latex_error_logger = filter_errors(generic_sink(logger.error))
     for line in compilation.stdout:
-        if b"Error" in line:
-            logger.error(line)
+        latex_error_logger.send(line.decode("utf-8").rstrip('\r\n'))
+
     logger.debug(f"{latex_file.name} has been compiled in {output_dir}")
     pwd.cd()