usr/lib/portage/pym/portage/util/_info_files.py

# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

import errno
import logging
import re
import stat
import subprocess

import portage
from portage import os
from portage.const import EPREFIX

def chk_updated_info_files(root, infodirs, prev_mtimes):

	if os.path.exists(EPREFIX + "/usr/bin/install-info"):
		out = portage.output.EOutput()
		regen_infodirs = []
		for z in infodirs:
			if z == '':
				continue
			inforoot = portage.util.normalize_path(root + EPREFIX + z)
			if os.path.isdir(inforoot) and \
				not [x for x in os.listdir(inforoot) \
				if x.startswith('.keepinfodir')]:
					infomtime = os.stat(inforoot)[stat.ST_MTIME]
					if inforoot not in prev_mtimes or \
						prev_mtimes[inforoot] != infomtime:
							regen_infodirs.append(inforoot)

		if not regen_infodirs:
			portage.util.writemsg_stdout("\n")
			if portage.util.noiselimit >= 0:
				out.einfo("GNU info directory index is up-to-date.")
		else:
			portage.util.writemsg_stdout("\n")
			if portage.util.noiselimit >= 0:
				out.einfo("Regenerating GNU info directory index...")

			dir_extensions = ("", ".gz", ".bz2")
			icount = 0
			badcount = 0
			errmsg = ""
			for inforoot in regen_infodirs:
				if inforoot == '':
					continue

				if not os.path.isdir(inforoot) or \
					not os.access(inforoot, os.W_OK):
					continue

				file_list = os.listdir(inforoot)
				file_list.sort()
				dir_file = os.path.join(inforoot, "dir")
				moved_old_dir = False
				processed_count = 0
				for x in file_list:
					if x.startswith(".") or \
						os.path.isdir(os.path.join(inforoot, x)):
						continue
					if x.startswith("dir"):
						skip = False
						for ext in dir_extensions:
							if x == "dir" + ext or \
								x == "dir" + ext + ".old":
								skip = True
								break
						if skip:
							continue
					if processed_count == 0:
						for ext in dir_extensions:
							try:
								os.rename(dir_file + ext, dir_file + ext + ".old")
								moved_old_dir = True
							except EnvironmentError as e:
								if e.errno != errno.ENOENT:
									raise
								del e
					processed_count += 1
					try:
						proc = subprocess.Popen(
							['%s/usr/bin/install-info' % EPREFIX,
							'--dir-file=%s' % os.path.join(inforoot, "dir"),
							os.path.join(inforoot, x)],
							env=dict(os.environ, LANG="C", LANGUAGE="C"),
							stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
					except OSError:
						myso = None
					else:
						myso = portage._unicode_decode(
							proc.communicate()[0]).rstrip("\n")
						proc.wait()
					existsstr = "already exists, for file `"
					if myso:
						if re.search(existsstr, myso):
							# Already exists... Don't increment the count for this.
							pass
						elif myso[:44] == "install-info: warning: no info dir entry in ":
							# This info file doesn't contain a DIR-header: install-info produces this
							# (harmless) warning (the --quiet switch doesn't seem to work).
							# Don't increment the count for this.
							pass
						else:
							badcount += 1
							errmsg += myso + "\n"
					icount += 1

				if moved_old_dir and not os.path.exists(dir_file):
					# We didn't generate a new dir file, so put the old file
					# back where it was originally found.
					for ext in dir_extensions:
						try:
							os.rename(dir_file + ext + ".old", dir_file + ext)
						except EnvironmentError as e:
							if e.errno != errno.ENOENT:
								raise
							del e

				# Clean dir.old cruft so that they don't prevent
				# unmerge of otherwise empty directories.
				for ext in dir_extensions:
					try:
						os.unlink(dir_file + ext + ".old")
					except EnvironmentError as e:
						if e.errno != errno.ENOENT:
							raise
						del e

				#update mtime so we can potentially avoid regenerating.
				prev_mtimes[inforoot] = os.stat(inforoot)[stat.ST_MTIME]

			if badcount:
				out.eerror("Processed %d info files; %d errors." % \
					(icount, badcount))
				portage.util.writemsg_level(errmsg,
					level=logging.ERROR, noiselevel=-1)
			else:
				if icount > 0 and portage.util.noiselimit >= 0:
					out.einfo("Processed %d info files." % (icount,))