makePDF.py

# ST2/ST3 compat
from __future__ import print_function 
import sublime
if sublime.version() < '3000':
    # we are on ST2 and Python 2.X
	_ST3 = False
	import getTeXRoot
	import parseTeXlog
else:
	_ST3 = True
	from . import getTeXRoot
	from . import parseTeXlog

import sublime_plugin
import sys
import imp
import os, os.path
import threading
import functools
import subprocess
import types
import re
import codecs

DEBUG = False

# Compile current .tex file to pdf
# Allow custom scripts and build engines!

# The actual work is done by builders, loaded on-demand from prefs

# Encoding: especially useful for Windows
# TODO: counterpart for OSX? Guess encoding of files?
def getOEMCP():
    # Windows OEM/Ansi codepage mismatch issue.
    # We need the OEM cp, because texify and friends are console programs
    import ctypes
    codepage = ctypes.windll.kernel32.GetOEMCP()
    return str(codepage)





# First, define thread class for async processing

class CmdThread ( threading.Thread ):

	# Use __init__ to pass things we need
	# in particular, we pass the caller in teh main thread, so we can display stuff!
	def __init__ (self, caller):
		self.caller = caller
		threading.Thread.__init__ ( self )

	def run ( self ):
		print ("Welcome to thread " + self.getName())
		self.caller.output("[Compiling " + self.caller.file_name + "]")

		# Handle path; copied from exec.py
		if self.caller.path:
			old_path = os.environ["PATH"]
			# The user decides in the build system  whether he wants to append $PATH
			# or tuck it at the front: "$PATH;C:\\new\\path", "C:\\new\\path;$PATH"
			# Handle differently in Python 2 and 3, to be safe:
			if not _ST3:
				os.environ["PATH"] = os.path.expandvars(self.caller.path).encode(sys.getfilesystemencoding())
			else:
				os.environ["PATH"] = os.path.expandvars(self.caller.path)

		# Set up Windows-specific parameters
		if self.caller.plat == "windows":
			# make sure console does not come up
			startupinfo = subprocess.STARTUPINFO()
			startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW

		# Now, iteratively call the builder iterator
		#
		cmd_iterator = self.caller.builder.commands()
		for (cmd, msg) in cmd_iterator:

			# If there is a message, display it
			if msg:
				self.caller.output(msg)

			# If there is nothing to be done, exit loop
			# (Avoids error with empty cmd_iterator)
			if cmd == "":
				break
			print(cmd)
			# Now create a Popen object
			try:
				if self.caller.plat == "windows":
					proc = subprocess.Popen(cmd, startupinfo=startupinfo, stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
				elif self.caller.plat == "osx":
					# Temporary (?) fix for Yosemite: pass environment
					proc = subprocess.Popen(cmd, stderr=subprocess.STDOUT, stdout=subprocess.PIPE, env=os.environ)
				else: # Must be linux
					proc = subprocess.Popen(cmd, stderr=subprocess.STDOUT, stdout=subprocess.PIPE)
			except:
				self.caller.output("\n\nCOULD NOT COMPILE!\n\n")
				self.caller.output("Attempted command:")
				self.caller.output(" ".join(cmd))
				self.caller.output("\nBuild engine: " + self.caller.builder.name)
				self.caller.proc = None
				if self.caller.path:
					os.environ["PATH"] = old_path
				return
			
			# Now actually invoke the command, making sure we allow for killing
			# First, save process handle into caller; then communicate (which blocks)
			self.caller.proc = proc
			out, err = proc.communicate()
			self.caller.builder.set_output(out.decode(self.caller.encoding,"ignore"))

			# Here the process terminated, but it may have been killed. If so, stop and don't read log
			# Since we set self.caller.proc above, if it is None, the process must have been killed.
			# TODO: clean up?
			if not self.caller.proc:
				print (proc.returncode)
				self.caller.output("\n\n[User terminated compilation process]\n")
				self.caller.finish(False)	# We kill, so won't switch to PDF anyway
				return
			# Here we are done cleanly:
			self.caller.proc = None
			print ("Finished normally")
			print (proc.returncode)

			# At this point, out contains the output from the current command;
			# we pass it to the cmd_iterator and get the next command, until completion

		# Clean up
		cmd_iterator.close()

		# restore path if needed
		if self.caller.path:
			os.environ["PATH"] = old_path

		# CHANGED 12-10-27. OK, here's the deal. We must open in binary mode on Windows
		# because silly MiKTeX inserts ASCII control characters in over/underfull warnings.
		# In particular it inserts EOFs, which stop reading altogether; reading in binary
		# prevents that. However, that's not the whole story: if a FS character is encountered,
		# AND if we invoke splitlines on a STRING, it sadly breaks the line in two. This messes up
		# line numbers in error reports. If, on the other hand, we invoke splitlines on a
		# byte array (? whatever read() returns), this does not happen---we only break at \n, etc.
		# However, we must still decode the resulting lines using the relevant encoding.
		# 121101 -- moved splitting and decoding logic to parseTeXlog, where it belongs.
		
		# Note to self: need to think whether we don't want to codecs.open this, too...
		# Also, we may want to move part of this logic to the builder...
		data = open(self.caller.tex_base + ".log", 'rb').read()		

		errors = []
		warnings = []

		try:
			(errors, warnings) = parseTeXlog.parse_tex_log(data)
			content = [""]
			if errors:
				content.append("Errors:") 
				content.append("")
				content.extend(errors)
			else:
				content.append("No errors.")
			if warnings:
				if errors:
					content.extend(["", "Warnings:"])
				else:
					content[-1] = content[-1] + " Warnings:" 
				content.append("")
				content.extend(warnings)
			else:
				content.append("")
		except Exception as e:
			content=["",""]
			content.append("LaTeXtools could not parse the TeX log file")
			content.append("(actually, we never should have gotten here)")
			content.append("")
			content.append("Python exception: " + repr(e))
			content.append("")
			content.append("Please let me know on GitHub. Thanks!")

		self.caller.output(content)
		self.caller.output("\n\n[Done!]\n")
		self.caller.finish(len(errors) == 0)


# Actual Command

class make_pdfCommand(sublime_plugin.WindowCommand):

	def run(self, cmd="", file_regex="", path=""):
		
		# Try to handle killing
		if hasattr(self, 'proc') and self.proc: # if we are running, try to kill running process
			self.output("\n\n### Got request to terminate compilation ###")
			self.proc.kill()
			self.proc = None
			return
		else: # either it's the first time we run, or else we have no running processes
			self.proc = None
		
		view = self.window.active_view()

		self.file_name = getTeXRoot.get_tex_root(view)
		if not os.path.isfile(self.file_name):
			sublime.error_message(self.file_name + ": file not found.")
			return

		self.tex_base, self.tex_ext = os.path.splitext(self.file_name)
		tex_dir = os.path.dirname(self.file_name)
		
		# Output panel: from exec.py
		if not hasattr(self, 'output_view'):
			self.output_view = self.window.get_output_panel("exec")

		# Dumb, but required for the moment for the output panel to be picked
        # up as the result buffer
		self.window.get_output_panel("exec")

		self.output_view.settings().set("result_file_regex", "^([^:\n\r]*):([0-9]+):?([0-9]+)?:? (.*)$")
		# self.output_view.settings().set("result_line_regex", line_regex)
		self.output_view.settings().set("result_base_dir", tex_dir)

		self.window.run_command("show_panel", {"panel": "output.exec"})
		
		self.output_view.settings().set("result_file_regex", file_regex)

		if view.is_dirty():
			print ("saving...")
			view.run_command('save') # call this on view, not self.window
		
		if self.tex_ext.upper() != ".TEX":
			sublime.error_message("%s is not a TeX source file: cannot compile." % (os.path.basename(view.file_name()),))
			return
		
		self.plat = sublime.platform()
		if self.plat == "osx":
			self.encoding = "UTF-8"
		elif self.plat == "windows":
			self.encoding = getOEMCP()
		elif self.plat == "linux":
			self.encoding = "UTF-8"
		else:
			sublime.error_message("Platform as yet unsupported. Sorry!")
			return	
		
		# Get platform settings, builder, and builder settings
		s = sublime.load_settings("LaTeXTools.sublime-settings")
		platform_settings  = s.get(self.plat)
		builder_name = s.get("builder")
		# This *must* exist, so if it doesn't, the user didn't migrate
		if builder_name is None:
			sublime.error_message("LaTeXTools: you need to migrate your preferences. See the README file for instructions.")
			return
		# Default to 'traditional' builder
		if builder_name in ['', 'default']:
			builder_name = 'traditional'
		builder_path = s.get("builder_path") # relative to ST packages dir!
		builder_file_name   = builder_name + 'Builder.py'
		builder_class_name  = builder_name.capitalize() + 'Builder'
		builder_settings = s.get("builder_settings")

		# Safety check: if we are using a built-in builder, disregard
		# builder_path, even if it was specified in the pref file
		if builder_name in ['simple', 'traditional', 'script', 'default','']:
			builder_path = None

		# Now actually get the builder
		ltt_path = os.path.join(sublime.packages_path(),'LaTeXTools','builders')
		if builder_path:
			bld_path = os.path.join(sublime.packages_path(), builder_path)
		else:
			bld_path = ltt_path
		bld_file = os.path.join(bld_path, builder_file_name)

		if not os.path.isfile(bld_file):
			sublime.error_message("Cannot find builder " + builder_name + ".\n" \
							      "Check your LaTeXTools Preferences")
			return
		
		# We save the system path and TEMPORARILY add the builders path to it,
		# so we can simply "import pdfBuilder" in the builder module
		# For custom builders, we need to add both the LaTeXTools builders
		# path, as well as the custom path specified above.
		# The mechanics are from http://effbot.org/zone/import-string.htm

		syspath_save = list(sys.path)
		sys.path.insert(0, ltt_path)
		if builder_path:
			sys.path.insert(0, bld_path)
		builder_module = __import__(builder_name + 'Builder')
		sys.path[:] = syspath_save
		
		print(repr(builder_module))
		builder_class = getattr(builder_module, builder_class_name)
		print(repr(builder_class))
		# We should now be able to construct the builder object
		self.builder = builder_class(self.file_name, self.output, builder_settings, platform_settings)
		
		# Restore Python system path
		sys.path[:] = syspath_save
		
		# Now get the tex binary path from prefs, change directory to
		# that of the tex root file, and run!
		self.path = platform_settings['texpath']
		os.chdir(tex_dir)
		CmdThread(self).start()
		print (threading.active_count())


	# Threading headaches :-)
	# The following function is what gets called from CmdThread; in turn,
	# this spawns append_data, but on the main thread.

	def output(self, data):
		sublime.set_timeout(functools.partial(self.do_output, data), 0)

	def do_output(self, data):
        # if proc != self.proc:
        #     # a second call to exec has been made before the first one
        #     # finished, ignore it instead of intermingling the output.
        #     if proc:
        #         proc.kill()
        #     return

		# try:
		#     str = data.decode(self.encoding)
		# except:
		#     str = "[Decode error - output not " + self.encoding + "]"
		#     proc = None

		# decoding in thread, so we can pass coded and decoded data
		# handle both lists and strings
		# Need different handling for python 2 and 3
		if not _ST3:
			strdata = data if isinstance(data, types.StringTypes) else "\n".join(data)
		else:
			strdata = data if isinstance(data, str) else "\n".join(data)

		# Normalize newlines, Sublime Text always uses a single \n separator
		# in memory.
		strdata = strdata.replace('\r\n', '\n').replace('\r', '\n')

		selection_was_at_end = (len(self.output_view.sel()) == 1
		    and self.output_view.sel()[0]
		        == sublime.Region(self.output_view.size()))
		self.output_view.set_read_only(False)
		# Move this to a TextCommand for compatibility with ST3
		self.output_view.run_command("do_output_edit", {"data": strdata, "selection_was_at_end": selection_was_at_end})
		# edit = self.output_view.begin_edit()
		# self.output_view.insert(edit, self.output_view.size(), strdata)
		# if selection_was_at_end:
		#     self.output_view.show(self.output_view.size())
		# self.output_view.end_edit(edit)
		self.output_view.set_read_only(True)	

	# Also from exec.py
	# Set the selection to the start of the output panel, so next_result works
	# Then run viewer

	def finish(self, can_switch_to_pdf):
		sublime.set_timeout(functools.partial(self.do_finish, can_switch_to_pdf), 0)

	def do_finish(self, can_switch_to_pdf):
		# Move to TextCommand for compatibility with ST3
		# edit = self.output_view.begin_edit()
		# self.output_view.sel().clear()
		# reg = sublime.Region(0)
		# self.output_view.sel().add(reg)
		# self.output_view.show(reg) # scroll to top
		# self.output_view.end_edit(edit)
		self.output_view.run_command("do_finish_edit")
		if can_switch_to_pdf:
			self.window.active_view().run_command("jump_to_pdf", {"from_keybinding": False})


class DoOutputEditCommand(sublime_plugin.TextCommand):
    def run(self, edit, data, selection_was_at_end):
        self.view.insert(edit, self.view.size(), data)
        if selection_was_at_end:
            self.view.show(self.view.size())

class DoFinishEditCommand(sublime_plugin.TextCommand):
    def run(self, edit):
        self.view.sel().clear()
        reg = sublime.Region(0)
        self.view.sel().add(reg)
        self.view.show(reg)