--- /dev/null
+"""SCons.Scanner.LaTeX
+
+This module implements the dependency scanner for LaTeX code.
+
+"""
+
+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 The SCons Foundation
+#
+# 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__ = "src/engine/SCons/Scanner/LaTeX.py 3842 2008/12/20 22:59:52 scons"
+
+import os.path
+import string
+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:
+ 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]):
+ #TODO(1.5)
+ #env.PrependENVPath(var, [os.path.abspath(str(p)) for p in env[var]])
+ env.PrependENVPath(var, map(lambda p: os.path.abspath(str(p)), env[var]))
+ else:
+ # Split at os.pathsep to convert into absolute path
+ #TODO(1.5) env.PrependENVPath(var, [os.path.abspath(p) for p in str(env[var]).split(os.pathsep)])
+ env.PrependENVPath(var, map(lambda p: os.path.abspath(p), string.split(str(env[var]), 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]):
+ # TODO(1.5)
+ #env['ENV'][var] = os.pathsep.join(env['ENV'][var])
+ env['ENV'][var] = string.join(env['ENV'][var], os.pathsep)
+ # 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:
+ """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['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'}
+ env_variables = SCons.Util.unique(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(?:\[[^\]]+\])?|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(node, path)
+
+ class FindMultiPathDirs:
+ """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:
+ """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'] = 1
+ kw['skeys'] = suffixes
+ kw['scan_check'] = LaTeXScanCheck(suffixes)
+ kw['name'] = name
+
+ apply(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 == "":
+ #TODO(1.5) return [filename + e for e in self.graphics_extensions]
+ return map(lambda e, f=filename: f+e, 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, path=()):
+ # 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_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 = string.split(include[1],',')
+ for j in range(len(inc_list)):
+ split_includes.append( (inc_type, inc_list[j]) )
+ #
+ includes = split_includes
+ node.includes = includes
+
+ # 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:
+ #
+ # 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))
+ #
+ nodes.sort()
+ nodes = map(lambda pair: pair[1], nodes)
+ return nodes
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