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https://git.lyx.org/repos/lyx.git
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bb55234cac
Introduce --debug and --verbose flags to control output. Also, use the python subprocess module to capture stderr from external commands, thus bumping the python requirement to version 2.4 or later. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@39660 a592a061-630c-0410-9148-cb99ea01b6c8
304 lines
9.2 KiB
Python
304 lines
9.2 KiB
Python
#! /usr/bin/env python
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# file lyxpreview_tools.py
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# This file is part of LyX, the document processor.
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# Licence details can be found in the file COPYING.
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# author Angus Leeming
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# Full author contact details are available in file CREDITS
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# and with much help testing the code under Windows from
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# Paul A. Rubin, rubin@msu.edu.
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# A repository of the following functions, used by the lyxpreview2xyz scripts.
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# copyfileobj, error, find_exe, find_exe_or_terminate, make_texcolor, mkstemp,
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# progress, run_command, warning
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# Requires python 2.4 or later (subprocess module).
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import os, re, string, subprocess, sys, tempfile
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# Control the output to stdout
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debug = False
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verbose = False
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# Known flavors of latex
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latex_commands = ("latex", "pplatex", "platex", "latex2e")
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pdflatex_commands = ("pdflatex", "xelatex", "lualatex")
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# Pre-compiled regular expressions
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latex_file_re = re.compile(r"\.tex$")
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# PATH and PATHEXT environment variables
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path = os.environ["PATH"].split(os.pathsep)
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extlist = ['']
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if "PATHEXT" in os.environ:
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extlist += os.environ["PATHEXT"].split(os.pathsep)
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use_win32_modules = 0
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if os.name == "nt":
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use_win32_modules = 1
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try:
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import pywintypes
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import win32con
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import win32event
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import win32file
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import win32pipe
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import win32process
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import win32security
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import winerror
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except:
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sys.stderr.write("Consider installing the PyWin extension modules " \
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"if you're irritated by windows appearing briefly.\n")
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use_win32_modules = 0
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def progress(message):
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global verbose
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if verbose:
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sys.stdout.write("Progress: %s\n" % message)
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def warning(message):
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sys.stderr.write("Warning: %s\n" % message)
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def error(message):
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sys.stderr.write("Error: %s\n" % message)
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sys.exit(1)
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def make_texcolor(hexcolor, graphics):
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# Test that the input string contains 6 hexadecimal chars.
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hexcolor_re = re.compile("^[0-9a-fA-F]{6}$")
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if not hexcolor_re.match(hexcolor):
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error("Cannot convert color '%s'" % hexcolor)
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red = float(string.atoi(hexcolor[0:2], 16)) / 255.0
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green = float(string.atoi(hexcolor[2:4], 16)) / 255.0
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blue = float(string.atoi(hexcolor[4:6], 16)) / 255.0
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if graphics:
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return "%f,%f,%f" % (red, green, blue)
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else:
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return "rgb %f %f %f" % (red, green, blue)
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def find_exe(candidates):
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global extlist, path
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for prog in candidates:
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for directory in path:
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for ext in extlist:
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full_path = os.path.join(directory, prog + ext)
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if os.access(full_path, os.X_OK):
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# The thing is in the PATH already (or we wouldn't
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# have found it). Return just the basename to avoid
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# problems when the path to the executable contains
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# spaces.
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return os.path.basename(full_path)
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return None
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def find_exe_or_terminate(candidates):
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exe = find_exe(candidates)
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if exe == None:
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error("Unable to find executable from '%s'" % string.join(candidates))
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return exe
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def run_command_popen(cmd):
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pipe = subprocess.Popen(cmd, shell=True, close_fds=True, stdin=subprocess.PIPE, \
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stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True)
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cmd_stdout = pipe.communicate()[0]
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cmd_status = pipe.returncode
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global debug
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if debug:
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sys.stdout.write(cmd_stdout)
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return cmd_status, cmd_stdout
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def run_command_win32(cmd):
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sa = win32security.SECURITY_ATTRIBUTES()
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sa.bInheritHandle = True
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stdout_r, stdout_w = win32pipe.CreatePipe(sa, 0)
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si = win32process.STARTUPINFO()
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si.dwFlags = (win32process.STARTF_USESTDHANDLES
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| win32process.STARTF_USESHOWWINDOW)
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si.wShowWindow = win32con.SW_HIDE
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si.hStdOutput = stdout_w
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process, thread, pid, tid = \
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win32process.CreateProcess(None, cmd, None, None, True,
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0, None, None, si)
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if process == None:
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return -1, ""
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# Must close the write handle in this process, or ReadFile will hang.
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stdout_w.Close()
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# Read the pipe until we get an error (including ERROR_BROKEN_PIPE,
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# which is okay because it happens when child process ends).
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data = ""
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error = 0
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while 1:
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try:
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hr, buffer = win32file.ReadFile(stdout_r, 4096)
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if hr != winerror.ERROR_IO_PENDING:
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data = data + buffer
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except pywintypes.error, e:
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if e.args[0] != winerror.ERROR_BROKEN_PIPE:
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error = 1
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break
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if error:
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return -2, ""
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# Everything is okay --- the called process has closed the pipe.
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# For safety, check that the process ended, then pick up its exit code.
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win32event.WaitForSingleObject(process, win32event.INFINITE)
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if win32process.GetExitCodeProcess(process):
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return -3, ""
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global debug
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if debug:
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sys.stdout.write(data)
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return 0, data
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def run_command(cmd):
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progress("Running %s" % cmd)
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if use_win32_modules:
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return run_command_win32(cmd)
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else:
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return run_command_popen(cmd)
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def get_version_info():
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version_re = re.compile("([0-9])\.([0-9])")
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match = version_re.match(sys.version)
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if match == None:
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error("Unable to extract version info from 'sys.version'")
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return string.atoi(match.group(1)), string.atoi(match.group(2))
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def copyfileobj(fsrc, fdst, rewind=0, length=16*1024):
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"""copy data from file-like object fsrc to file-like object fdst"""
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if rewind:
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fsrc.flush()
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fsrc.seek(0)
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while 1:
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buf = fsrc.read(length)
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if not buf:
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break
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fdst.write(buf)
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class TempFile:
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"""clone of tempfile.TemporaryFile to use with python < 2.0."""
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# Cache the unlinker so we don't get spurious errors at shutdown
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# when the module-level "os" is None'd out. Note that this must
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# be referenced as self.unlink, because the name TempFile
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# may also get None'd out before __del__ is called.
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unlink = os.unlink
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def __init__(self):
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self.filename = tempfile.mktemp()
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self.file = open(self.filename,"w+b")
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self.close_called = 0
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def close(self):
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if not self.close_called:
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self.close_called = 1
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self.file.close()
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self.unlink(self.filename)
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def __del__(self):
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self.close()
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def read(self, size = -1):
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return self.file.read(size)
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def write(self, line):
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return self.file.write(line)
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def seek(self, offset):
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return self.file.seek(offset)
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def flush(self):
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return self.file.flush()
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def mkstemp():
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"""create a secure temporary file and return its object-like file"""
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major, minor = get_version_info()
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if major >= 2 and minor >= 0:
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return tempfile.TemporaryFile()
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else:
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return TempFile()
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def write_metrics_info(metrics_info, metrics_file):
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metrics = open(metrics_file, 'w')
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for metric in metrics_info:
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metrics.write("Snippet %s %f\n" % metric)
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metrics.close()
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# Reads a .tex files and create an identical file but only with
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# pages whose index is in pages_to_keep
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def filter_pages(source_path, destination_path, pages_to_keep):
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source_file = open(source_path, "r")
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destination_file = open(destination_path, "w")
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page_index = 0
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skip_page = False
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for line in source_file:
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# We found a new page
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if line.startswith("\\begin{preview}"):
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page_index += 1
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# If the page index isn't in pages_to_keep we don't copy it
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skip_page = page_index not in pages_to_keep
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if not skip_page:
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destination_file.write(line)
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# End of a page, we reset the skip_page bool
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if line.startswith("\\end{preview}"):
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skip_page = False
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destination_file.close()
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source_file.close()
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# Joins two metrics list, that is a list of tuple (page_index, metric)
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# new_page_indexes contains the original page number of the pages in new_metrics
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# e.g. new_page_indexes[3] == 14 means that the 4th item in new_metrics is the 15th in the original counting
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# original_bitmap and destination_bitmap are file name models used to rename the new files
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# e.g. image_new%d.png and image_%d.png
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def join_metrics_and_rename(original_metrics, new_metrics, new_page_indexes, original_bitmap, destination_bitmap):
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legacy_index = 0
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for (index, metric) in new_metrics:
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# If the file exists we rename it
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if os.path.isfile(original_bitmap % (index)):
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os.rename(original_bitmap % (index), destination_bitmap % new_page_indexes[index-1])
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# Extract the original page index
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index = new_page_indexes[index-1]
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# Goes through the array until the end is reached or the correct index is found
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while legacy_index < len(original_metrics) and original_metrics[legacy_index][0] < index:
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legacy_index += 1
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# Add or update the metric for this page
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if legacy_index < len(original_metrics) and original_metrics[legacy_index][0] == index:
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original_metrics[legacy_index] = (index, metric)
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else:
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original_metrics.insert(legacy_index, (index, metric))
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