"""SCons.Scanner.LaTeX This module implements the dependency scanner for LaTeX code. """ # # __COPYRIGHT__ # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # __revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__" import os.path import re import SCons.Scanner import SCons.Util # list of graphics file extensions for TeX and LaTeX TexGraphics = ['.eps', '.ps'] LatexGraphics = ['.pdf', '.png', '.jpg', '.gif', '.tif'] # Used as a return value of modify_env_var if the variable is not set. class _Null(object): pass _null = _Null # The user specifies the paths in env[variable], similar to other builders. # They may be relative and must be converted to absolute, as expected # by LaTeX and Co. The environment may already have some paths in # env['ENV'][var]. These paths are honored, but the env[var] paths have # higher precedence. All changes are un-done on exit. def modify_env_var(env, var, abspath): try: save = env['ENV'][var] except KeyError: save = _null env.PrependENVPath(var, abspath) try: if SCons.Util.is_List(env[var]): env.PrependENVPath(var, [os.path.abspath(str(p)) for p in env[var]]) else: # Split at os.pathsep to convert into absolute path env.PrependENVPath(var, [os.path.abspath(p) for p in str(env[var]).split(os.pathsep)]) except KeyError: pass # Convert into a string explicitly to append ":" (without which it won't search system # paths as well). The problem is that env.AppendENVPath(var, ":") # does not work, refuses to append ":" (os.pathsep). if SCons.Util.is_List(env['ENV'][var]): env['ENV'][var] = os.pathsep.join(env['ENV'][var]) # Append the trailing os.pathsep character here to catch the case with no env[var] env['ENV'][var] = env['ENV'][var] + os.pathsep return save class FindENVPathDirs(object): """A class to bind a specific *PATH variable name to a function that will return all of the *path directories.""" def __init__(self, variable): self.variable = variable def __call__(self, env, dir=None, target=None, source=None, argument=None): import SCons.PathList try: path = env['ENV'][self.variable] except KeyError: return () dir = dir or env.fs._cwd path = SCons.PathList.PathList(path).subst_path(env, target, source) return tuple(dir.Rfindalldirs(path)) def LaTeXScanner(): """Return a prototype Scanner instance for scanning LaTeX source files when built with latex. """ ds = LaTeX(name = "LaTeXScanner", suffixes = '$LATEXSUFFIXES', # in the search order, see below in LaTeX class docstring graphics_extensions = TexGraphics, recursive = 0) return ds def PDFLaTeXScanner(): """Return a prototype Scanner instance for scanning LaTeX source files when built with pdflatex. """ ds = LaTeX(name = "PDFLaTeXScanner", suffixes = '$LATEXSUFFIXES', # in the search order, see below in LaTeX class docstring graphics_extensions = LatexGraphics, recursive = 0) return ds class LaTeX(SCons.Scanner.Base): """Class for scanning LaTeX files for included files. Unlike most scanners, which use regular expressions that just return the included file name, this returns a tuple consisting of the keyword for the inclusion ("include", "includegraphics", "input", or "bibliography"), and then the file name itself. Based on a quick look at LaTeX documentation, it seems that we should append .tex suffix for the "include" keywords, append .tex if there is no extension for the "input" keyword, and need to add .bib for the "bibliography" keyword that does not accept extensions by itself. Finally, if there is no extension for an "includegraphics" keyword latex will append .ps or .eps to find the file, while pdftex may use .pdf, .jpg, .tif, .mps, or .png. The actual subset and search order may be altered by DeclareGraphicsExtensions command. This complication is ignored. The default order corresponds to experimentation with teTeX $ latex --version pdfeTeX 3.141592-1.21a-2.2 (Web2C 7.5.4) kpathsea version 3.5.4 The order is: ['.eps', '.ps'] for latex ['.png', '.pdf', '.jpg', '.tif']. Another difference is that the search path is determined by the type of the file being searched: env['TEXINPUTS'] for "input" and "include" keywords env['TEXINPUTS'] for "includegraphics" keyword env['TEXINPUTS'] for "lstinputlisting" keyword env['BIBINPUTS'] for "bibliography" keyword env['BSTINPUTS'] for "bibliographystyle" keyword FIXME: also look for the class or style in document[class|style]{} FIXME: also look for the argument of bibliographystyle{} """ keyword_paths = {'include': 'TEXINPUTS', 'input': 'TEXINPUTS', 'includegraphics': 'TEXINPUTS', 'bibliography': 'BIBINPUTS', 'bibliographystyle': 'BSTINPUTS', 'usepackage': 'TEXINPUTS', 'lstinputlisting': 'TEXINPUTS'} env_variables = SCons.Util.unique(list(keyword_paths.values())) def __init__(self, name, suffixes, graphics_extensions, *args, **kw): # We have to include \n with the % we exclude from the first part # part of the regex because the expression is compiled with re.M. # Without the \n, the ^ could match the beginning of a *previous* # line followed by one or more newline characters (i.e. blank # lines), interfering with a match on the next line. regex = r'^[^%\n]*\\(include|includegraphics(?:\[[^\]]+\])?|lstinputlisting(?:\[[^\]]+\])?|input|bibliography|usepackage){([^}]*)}' self.cre = re.compile(regex, re.M) self.graphics_extensions = graphics_extensions def _scan(node, env, path=(), self=self): node = node.rfile() if not node.exists(): return [] return self.scan_recurse(node, path) class FindMultiPathDirs(object): """The stock FindPathDirs function has the wrong granularity: it is called once per target, while we need the path that depends on what kind of included files is being searched. This wrapper hides multiple instances of FindPathDirs, one per the LaTeX path variable in the environment. When invoked, the function calculates and returns all the required paths as a dictionary (converted into a tuple to become hashable). Then the scan function converts it back and uses a dictionary of tuples rather than a single tuple of paths. """ def __init__(self, dictionary): self.dictionary = {} for k,n in dictionary.items(): self.dictionary[k] = ( SCons.Scanner.FindPathDirs(n), FindENVPathDirs(n) ) def __call__(self, env, dir=None, target=None, source=None, argument=None): di = {} for k,(c,cENV) in self.dictionary.items(): di[k] = ( c(env, dir=None, target=None, source=None, argument=None) , cENV(env, dir=None, target=None, source=None, argument=None) ) # To prevent "dict is not hashable error" return tuple(di.items()) class LaTeXScanCheck(object): """Skip all but LaTeX source files, i.e., do not scan *.eps, *.pdf, *.jpg, etc. """ def __init__(self, suffixes): self.suffixes = suffixes def __call__(self, node, env): current = not node.has_builder() or node.is_up_to_date() scannable = node.get_suffix() in env.subst_list(self.suffixes)[0] # Returning false means that the file is not scanned. return scannable and current kw['function'] = _scan kw['path_function'] = FindMultiPathDirs(LaTeX.keyword_paths) kw['recursive'] = 0 kw['skeys'] = suffixes kw['scan_check'] = LaTeXScanCheck(suffixes) kw['name'] = name SCons.Scanner.Base.__init__(self, *args, **kw) def _latex_names(self, include): filename = include[1] if include[0] == 'input': base, ext = os.path.splitext( filename ) if ext == "": return [filename + '.tex'] if (include[0] == 'include'): return [filename + '.tex'] if include[0] == 'bibliography': base, ext = os.path.splitext( filename ) if ext == "": return [filename + '.bib'] if include[0] == 'usepackage': base, ext = os.path.splitext( filename ) if ext == "": return [filename + '.sty'] if include[0] == 'includegraphics': base, ext = os.path.splitext( filename ) if ext == "": #return [filename+e for e in self.graphics_extensions + TexGraphics] # use the line above to find dependencies for the PDF builder # when only an .eps figure is present. Since it will be found # if the user tells scons how to make the pdf figure, leave # it out for now. return [filename+e for e in self.graphics_extensions] return [filename] def sort_key(self, include): return SCons.Node.FS._my_normcase(str(include)) def find_include(self, include, source_dir, path): try: sub_path = path[include[0]] except (IndexError, KeyError): sub_path = () try_names = self._latex_names(include) for n in try_names: # see if we find it using the path in env[var] i = SCons.Node.FS.find_file(n, (source_dir,) + sub_path[0]) if i: return i, include # see if we find it using the path in env['ENV'][var] i = SCons.Node.FS.find_file(n, (source_dir,) + sub_path[1]) if i: return i, include return i, include def scan(self, node): # Modify the default scan function to allow for the regular # expression to return a comma separated list of file names # as can be the case with the bibliography keyword. # Cache the includes list in node so we only scan it once: # path_dict = dict(list(path)) noopt_cre = re.compile('\[.*$') if node.includes != None: includes = node.includes else: includes = self.cre.findall(node.get_text_contents()) # 1. Split comma-separated lines, e.g. # ('bibliography', 'phys,comp') # should become two entries # ('bibliography', 'phys') # ('bibliography', 'comp') # 2. Remove the options, e.g., such as # ('includegraphics[clip,width=0.7\\linewidth]', 'picture.eps') # should become # ('includegraphics', 'picture.eps') split_includes = [] for include in includes: inc_type = noopt_cre.sub('', include[0]) inc_list = include[1].split(',') for j in range(len(inc_list)): split_includes.append( (inc_type, inc_list[j]) ) # includes = split_includes node.includes = includes return includes def scan_recurse(self, node, path=()): """ do a recursive scan of the top level target file This lets us search for included files based on the directory of the main file just as latex does""" path_dict = dict(list(path)) queue = [] queue.extend( self.scan(node) ) seen = {} # This is a hand-coded DSU (decorate-sort-undecorate, or # Schwartzian transform) pattern. The sort key is the raw name # of the file as specifed on the \include, \input, etc. line. # TODO: what about the comment in the original Classic scanner: # """which lets # us keep the sort order constant regardless of whether the file # is actually found in a Repository or locally.""" nodes = [] source_dir = node.get_dir() #for include in includes: while queue: include = queue.pop() try: if seen[include[1]] == 1: continue except KeyError: seen[include[1]] = 1 # # Handle multiple filenames in include[1] # n, i = self.find_include(include, source_dir, path_dict) if n is None: # Do not bother with 'usepackage' warnings, as they most # likely refer to system-level files if include[0] != 'usepackage': SCons.Warnings.warn(SCons.Warnings.DependencyWarning, "No dependency generated for file: %s (included from: %s) -- file not found" % (i, node)) else: sortkey = self.sort_key(n) nodes.append((sortkey, n)) # recurse down queue.extend( self.scan(n) ) return [pair[1] for pair in sorted(nodes)] # Local Variables: # tab-width:4 # indent-tabs-mode:nil # End: # vim: set expandtab tabstop=4 shiftwidth=4: