1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# Copyright (c) 2013, Intel Corporation.
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# DESCRIPTION
# This module provides a place to collect various wic-related utils
# for the OpenEmbedded Image Tools.
#
# AUTHORS
# Tom Zanussi <tom.zanussi (at] linux.intel.com>
#
"""Miscellaneous functions."""
import logging
import os
import re
from collections import defaultdict
from distutils import spawn
from wic.errors import WicError
from wic.utils import runner
logger = logging.getLogger('wic')
# executable -> recipe pairs for exec_native_cmd
NATIVE_RECIPES = {"bmaptool": "bmap-tools",
"grub-mkimage": "grub-efi",
"isohybrid": "syslinux",
"mcopy": "mtools",
"mkdosfs": "dosfstools",
"mkisofs": "cdrtools",
"mkfs.btrfs": "btrfs-tools",
"mkfs.ext2": "e2fsprogs",
"mkfs.ext3": "e2fsprogs",
"mkfs.ext4": "e2fsprogs",
"mkfs.vfat": "dosfstools",
"mksquashfs": "squashfs-tools",
"mkswap": "util-linux",
"mmd": "syslinux",
"parted": "parted",
"sfdisk": "util-linux",
"sgdisk": "gptfdisk",
"syslinux": "syslinux"
}
def _exec_cmd(cmd_and_args, as_shell=False, catch=3):
"""
Execute command, catching stderr, stdout
Need to execute as_shell if the command uses wildcards
"""
logger.debug("_exec_cmd: %s", cmd_and_args)
args = cmd_and_args.split()
logger.debug(args)
if as_shell:
ret, out = runner.runtool(cmd_and_args, catch)
else:
ret, out = runner.runtool(args, catch)
out = out.strip()
if ret != 0:
raise WicError("_exec_cmd: %s returned '%s' instead of 0\noutput: %s" % \
(cmd_and_args, ret, out))
logger.debug("_exec_cmd: output for %s (rc = %d): %s",
cmd_and_args, ret, out)
return ret, out
def exec_cmd(cmd_and_args, as_shell=False, catch=3):
"""
Execute command, return output
"""
return _exec_cmd(cmd_and_args, as_shell, catch)[1]
def exec_native_cmd(cmd_and_args, native_sysroot, catch=3, pseudo=""):
"""
Execute native command, catching stderr, stdout
Need to execute as_shell if the command uses wildcards
Always need to execute native commands as_shell
"""
# The reason -1 is used is because there may be "export" commands.
args = cmd_and_args.split(';')[-1].split()
logger.debug(args)
if pseudo:
cmd_and_args = pseudo + cmd_and_args
native_paths = \
"%s/sbin:%s/usr/sbin:%s/usr/bin" % \
(native_sysroot, native_sysroot, native_sysroot)
native_cmd_and_args = "export PATH=%s:$PATH;%s" % \
(native_paths, cmd_and_args)
logger.debug("exec_native_cmd: %s", cmd_and_args)
# If the command isn't in the native sysroot say we failed.
if spawn.find_executable(args[0], native_paths):
ret, out = _exec_cmd(native_cmd_and_args, True, catch)
else:
ret = 127
prog = args[0]
# shell command-not-found
if ret == 127 \
or (pseudo and ret == 1 and out == "Can't find '%s' in $PATH." % prog):
msg = "A native program %s required to build the image "\
"was not found (see details above).\n\n" % prog
recipe = NATIVE_RECIPES.get(prog)
if recipe:
msg += "Please bake it with 'bitbake %s-native' "\
"and try again.\n" % recipe
else:
msg += "Wic failed to find a recipe to build native %s. Please "\
"file a bug against wic.\n" % prog
logger.error(msg)
return ret, out
BOOTDD_EXTRA_SPACE = 16384
class BitbakeVars(defaultdict):
"""
Container for Bitbake variables.
"""
def __init__(self):
defaultdict.__init__(self, dict)
# default_image and vars_dir attributes should be set from outside
self.default_image = None
self.vars_dir = None
def _parse_line(self, line, image, matcher=re.compile(r"^(\w+)=(.+)")):
"""
Parse one line from bitbake -e output or from .env file.
Put result key-value pair into the storage.
"""
if "=" not in line:
return
match = matcher.match(line)
if not match:
return
key, val = match.groups()
self[image][key] = val.strip('"')
def get_var(self, var, image=None, cache=True):
"""
Get bitbake variable from 'bitbake -e' output or from .env file.
This is a lazy method, i.e. it runs bitbake or parses file only when
only when variable is requested. It also caches results.
"""
if not image:
image = self.default_image
if image not in self:
if image and self.vars_dir:
fname = os.path.join(self.vars_dir, image + '.env')
if os.path.isfile(fname):
# parse .env file
with open(fname) as varsfile:
for line in varsfile:
self._parse_line(line, image)
else:
print("Couldn't get bitbake variable from %s." % fname)
print("File %s doesn't exist." % fname)
return
else:
# Get bitbake -e output
cmd = "bitbake -e"
if image:
cmd += " %s" % image
log_level = logger.getEffectiveLevel()
logger.setLevel(logging.INFO)
ret, lines = _exec_cmd(cmd)
logger.setLevel(log_level)
if ret:
logger.error("Couldn't get '%s' output.", cmd)
logger.error("Bitbake failed with error:\n%s\n", lines)
return
# Parse bitbake -e output
for line in lines.split('\n'):
self._parse_line(line, image)
# Make first image a default set of variables
if cache:
images = [key for key in self if key]
if len(images) == 1:
self[None] = self[image]
result = self[image].get(var)
if not cache:
self.pop(image, None)
return result
# Create BB_VARS singleton
BB_VARS = BitbakeVars()
def get_bitbake_var(var, image=None, cache=True):
"""
Provide old get_bitbake_var API by wrapping
get_var method of BB_VARS singleton.
"""
return BB_VARS.get_var(var, image, cache)
|
