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Diffstat (limited to 'scripts/lib/wic/utils/misc.py')
| -rw-r--r-- | scripts/lib/wic/utils/misc.py | 224 |
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diff --git a/scripts/lib/wic/utils/misc.py b/scripts/lib/wic/utils/misc.py new file mode 100644 index 0000000000..6781d8381a --- /dev/null +++ b/scripts/lib/wic/utils/misc.py | |||
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| 1 | # ex:ts=4:sw=4:sts=4:et | ||
| 2 | # -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- | ||
| 3 | # | ||
| 4 | # Copyright (c) 2013, Intel Corporation. | ||
| 5 | # All rights reserved. | ||
| 6 | # | ||
| 7 | # This program is free software; you can redistribute it and/or modify | ||
| 8 | # it under the terms of the GNU General Public License version 2 as | ||
| 9 | # published by the Free Software Foundation. | ||
| 10 | # | ||
| 11 | # This program is distributed in the hope that it will be useful, | ||
| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 14 | # GNU General Public License for more details. | ||
| 15 | # | ||
| 16 | # You should have received a copy of the GNU General Public License along | ||
| 17 | # with this program; if not, write to the Free Software Foundation, Inc., | ||
| 18 | # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 19 | # | ||
| 20 | # DESCRIPTION | ||
| 21 | # This module provides a place to collect various wic-related utils | ||
| 22 | # for the OpenEmbedded Image Tools. | ||
| 23 | # | ||
| 24 | # AUTHORS | ||
| 25 | # Tom Zanussi <tom.zanussi (at] linux.intel.com> | ||
| 26 | # | ||
| 27 | """Miscellaneous functions.""" | ||
| 28 | |||
| 29 | import os | ||
| 30 | import re | ||
| 31 | from collections import defaultdict | ||
| 32 | from distutils import spawn | ||
| 33 | |||
| 34 | from wic import msger | ||
| 35 | from wic.utils import runner | ||
| 36 | |||
| 37 | # executable -> recipe pairs for exec_native_cmd | ||
| 38 | NATIVE_RECIPES = {"bmaptool": "bmap-tools", | ||
| 39 | "grub-mkimage": "grub-efi", | ||
| 40 | "isohybrid": "syslinux", | ||
| 41 | "mcopy": "mtools", | ||
| 42 | "mkdosfs": "dosfstools", | ||
| 43 | "mkisofs": "cdrtools", | ||
| 44 | "mkfs.btrfs": "btrfs-tools", | ||
| 45 | "mkfs.ext2": "e2fsprogs", | ||
| 46 | "mkfs.ext3": "e2fsprogs", | ||
| 47 | "mkfs.ext4": "e2fsprogs", | ||
| 48 | "mkfs.vfat": "dosfstools", | ||
| 49 | "mksquashfs": "squashfs-tools", | ||
| 50 | "mkswap": "util-linux", | ||
| 51 | "mmd": "syslinux", | ||
| 52 | "parted": "parted", | ||
| 53 | "sfdisk": "util-linux", | ||
| 54 | "sgdisk": "gptfdisk", | ||
| 55 | "syslinux": "syslinux" | ||
| 56 | } | ||
| 57 | |||
| 58 | def _exec_cmd(cmd_and_args, as_shell=False, catch=3): | ||
| 59 | """ | ||
| 60 | Execute command, catching stderr, stdout | ||
| 61 | |||
| 62 | Need to execute as_shell if the command uses wildcards | ||
| 63 | """ | ||
| 64 | msger.debug("_exec_cmd: %s" % cmd_and_args) | ||
| 65 | args = cmd_and_args.split() | ||
| 66 | msger.debug(args) | ||
| 67 | |||
| 68 | if as_shell: | ||
| 69 | ret, out = runner.runtool(cmd_and_args, catch) | ||
| 70 | else: | ||
| 71 | ret, out = runner.runtool(args, catch) | ||
| 72 | out = out.strip() | ||
| 73 | if ret != 0: | ||
| 74 | msger.error("_exec_cmd: %s returned '%s' instead of 0\noutput: %s" % \ | ||
| 75 | (cmd_and_args, ret, out)) | ||
| 76 | |||
| 77 | msger.debug("_exec_cmd: output for %s (rc = %d): %s" % \ | ||
| 78 | (cmd_and_args, ret, out)) | ||
| 79 | |||
| 80 | return (ret, out) | ||
| 81 | |||
| 82 | |||
| 83 | def exec_cmd(cmd_and_args, as_shell=False, catch=3): | ||
| 84 | """ | ||
| 85 | Execute command, catching stderr, stdout | ||
| 86 | |||
| 87 | Exits if rc non-zero | ||
| 88 | """ | ||
| 89 | ret, out = _exec_cmd(cmd_and_args, as_shell, catch) | ||
| 90 | |||
| 91 | return out | ||
| 92 | |||
| 93 | def exec_native_cmd(cmd_and_args, native_sysroot, catch=3, pseudo=""): | ||
| 94 | """ | ||
| 95 | Execute native command, catching stderr, stdout | ||
| 96 | |||
| 97 | Need to execute as_shell if the command uses wildcards | ||
| 98 | |||
| 99 | Always need to execute native commands as_shell | ||
| 100 | """ | ||
| 101 | # The reason -1 is used is because there may be "export" commands. | ||
| 102 | args = cmd_and_args.split(';')[-1].split() | ||
| 103 | msger.debug(args) | ||
| 104 | |||
| 105 | if pseudo: | ||
| 106 | cmd_and_args = pseudo + cmd_and_args | ||
| 107 | native_paths = \ | ||
| 108 | "%s/sbin:%s/usr/sbin:%s/usr/bin" % \ | ||
| 109 | (native_sysroot, native_sysroot, native_sysroot) | ||
| 110 | native_cmd_and_args = "export PATH=%s:$PATH;%s" % \ | ||
| 111 | (native_paths, cmd_and_args) | ||
| 112 | msger.debug("exec_native_cmd: %s" % cmd_and_args) | ||
| 113 | |||
| 114 | # If the command isn't in the native sysroot say we failed. | ||
| 115 | if spawn.find_executable(args[0], native_paths): | ||
| 116 | ret, out = _exec_cmd(native_cmd_and_args, True, catch) | ||
| 117 | else: | ||
| 118 | ret = 127 | ||
| 119 | |||
| 120 | prog = args[0] | ||
| 121 | # shell command-not-found | ||
| 122 | if ret == 127 \ | ||
| 123 | or (pseudo and ret == 1 and out == "Can't find '%s' in $PATH." % prog): | ||
| 124 | msg = "A native program %s required to build the image "\ | ||
| 125 | "was not found (see details above).\n\n" % prog | ||
| 126 | recipe = NATIVE_RECIPES.get(prog) | ||
| 127 | if recipe: | ||
| 128 | msg += "Please bake it with 'bitbake %s-native' "\ | ||
| 129 | "and try again.\n" % recipe | ||
| 130 | else: | ||
| 131 | msg += "Wic failed to find a recipe to build native %s. Please "\ | ||
| 132 | "file a bug against wic.\n" % prog | ||
| 133 | msger.error(msg) | ||
| 134 | |||
| 135 | return ret, out | ||
| 136 | |||
| 137 | BOOTDD_EXTRA_SPACE = 16384 | ||
| 138 | |||
| 139 | class BitbakeVars(defaultdict): | ||
| 140 | """ | ||
| 141 | Container for Bitbake variables. | ||
| 142 | """ | ||
| 143 | def __init__(self): | ||
| 144 | defaultdict.__init__(self, dict) | ||
| 145 | |||
| 146 | # default_image and vars_dir attributes should be set from outside | ||
| 147 | self.default_image = None | ||
| 148 | self.vars_dir = None | ||
| 149 | |||
| 150 | def _parse_line(self, line, image, matcher=re.compile(r"^(\w+)=(.+)")): | ||
| 151 | """ | ||
| 152 | Parse one line from bitbake -e output or from .env file. | ||
| 153 | Put result key-value pair into the storage. | ||
| 154 | """ | ||
| 155 | if "=" not in line: | ||
| 156 | return | ||
| 157 | match = matcher.match(line) | ||
| 158 | if not match: | ||
| 159 | return | ||
| 160 | key, val = match.groups() | ||
| 161 | self[image][key] = val.strip('"') | ||
| 162 | |||
| 163 | def get_var(self, var, image=None, cache=True): | ||
| 164 | """ | ||
| 165 | Get bitbake variable from 'bitbake -e' output or from .env file. | ||
| 166 | This is a lazy method, i.e. it runs bitbake or parses file only when | ||
| 167 | only when variable is requested. It also caches results. | ||
| 168 | """ | ||
| 169 | if not image: | ||
| 170 | image = self.default_image | ||
| 171 | |||
| 172 | if image not in self: | ||
| 173 | if image and self.vars_dir: | ||
| 174 | fname = os.path.join(self.vars_dir, image + '.env') | ||
| 175 | if os.path.isfile(fname): | ||
| 176 | # parse .env file | ||
| 177 | with open(fname) as varsfile: | ||
| 178 | for line in varsfile: | ||
| 179 | self._parse_line(line, image) | ||
| 180 | else: | ||
| 181 | print("Couldn't get bitbake variable from %s." % fname) | ||
| 182 | print("File %s doesn't exist." % fname) | ||
| 183 | return | ||
| 184 | else: | ||
| 185 | # Get bitbake -e output | ||
| 186 | cmd = "bitbake -e" | ||
| 187 | if image: | ||
| 188 | cmd += " %s" % image | ||
| 189 | |||
| 190 | log_level = msger.get_loglevel() | ||
| 191 | msger.set_loglevel('normal') | ||
| 192 | ret, lines = _exec_cmd(cmd) | ||
| 193 | msger.set_loglevel(log_level) | ||
| 194 | |||
| 195 | if ret: | ||
| 196 | print("Couldn't get '%s' output." % cmd) | ||
| 197 | print("Bitbake failed with error:\n%s\n" % lines) | ||
| 198 | return | ||
| 199 | |||
| 200 | # Parse bitbake -e output | ||
| 201 | for line in lines.split('\n'): | ||
| 202 | self._parse_line(line, image) | ||
| 203 | |||
| 204 | # Make first image a default set of variables | ||
| 205 | if cache: | ||
| 206 | images = [key for key in self if key] | ||
| 207 | if len(images) == 1: | ||
| 208 | self[None] = self[image] | ||
| 209 | |||
| 210 | result = self[image].get(var) | ||
| 211 | if not cache: | ||
| 212 | self.pop(image, None) | ||
| 213 | |||
| 214 | return result | ||
| 215 | |||
| 216 | # Create BB_VARS singleton | ||
| 217 | BB_VARS = BitbakeVars() | ||
| 218 | |||
| 219 | def get_bitbake_var(var, image=None, cache=True): | ||
| 220 | """ | ||
| 221 | Provide old get_bitbake_var API by wrapping | ||
| 222 | get_var method of BB_VARS singleton. | ||
| 223 | """ | ||
| 224 | return BB_VARS.get_var(var, image, cache) | ||
