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
|
# SPDX-License-Identifier: GPL-2.0+
#
# Copyright (c) 2016 Google, Inc
#
import command
import os
import shutil
import tempfile
import tout
# Output directly (generally this is temporary)
outdir = None
# True to keep the output directory around after exiting
preserve_outdir = False
# Path to the Chrome OS chroot, if we know it
chroot_path = None
# Search paths to use for Filename(), used to find files
search_paths = []
def PrepareOutputDir(dirname, preserve=False):
"""Select an output directory, ensuring it exists.
This either creates a temporary directory or checks that the one supplied
by the user is valid. For a temporary directory, it makes a note to
remove it later if required.
Args:
dirname: a string, name of the output directory to use to store
intermediate and output files. If is None - create a temporary
directory.
preserve: a Boolean. If outdir above is None and preserve is False, the
created temporary directory will be destroyed on exit.
Raises:
OSError: If it cannot create the output directory.
"""
global outdir, preserve_outdir
preserve_outdir = dirname or preserve
if dirname:
outdir = dirname
if not os.path.isdir(outdir):
try:
os.makedirs(outdir)
except OSError as err:
raise CmdError("Cannot make output directory '%s': '%s'" %
(outdir, err.strerror))
tout.Debug("Using output directory '%s'" % outdir)
else:
outdir = tempfile.mkdtemp(prefix='binman.')
tout.Debug("Using temporary directory '%s'" % outdir)
def _RemoveOutputDir():
global outdir
shutil.rmtree(outdir)
tout.Debug("Deleted temporary directory '%s'" % outdir)
outdir = None
def FinaliseOutputDir():
global outdir, preserve_outdir
"""Tidy up: delete output directory if temporary and not preserved."""
if outdir and not preserve_outdir:
_RemoveOutputDir()
def GetOutputFilename(fname):
"""Return a filename within the output directory.
Args:
fname: Filename to use for new file
Returns:
The full path of the filename, within the output directory
"""
return os.path.join(outdir, fname)
def _FinaliseForTest():
"""Remove the output directory (for use by tests)"""
global outdir
if outdir:
_RemoveOutputDir()
def SetInputDirs(dirname):
"""Add a list of input directories, where input files are kept.
Args:
dirname: a list of paths to input directories to use for obtaining
files needed by binman to place in the image.
"""
global indir
indir = dirname
tout.Debug("Using input directories %s" % indir)
def GetInputFilename(fname):
"""Return a filename for use as input.
Args:
fname: Filename to use for new file
Returns:
The full path of the filename, within the input directory
"""
if not indir:
return fname
for dirname in indir:
pathname = os.path.join(dirname, fname)
if os.path.exists(pathname):
return pathname
raise ValueError("Filename '%s' not found in input path (%s) (cwd='%s')" %
(fname, ','.join(indir), os.getcwd()))
def Align(pos, align):
if align:
mask = align - 1
pos = (pos + mask) & ~mask
return pos
def NotPowerOfTwo(num):
return num and (num & (num - 1))
def Run(name, *args):
command.Run(name, *args, cwd=outdir)
def Filename(fname):
"""Resolve a file path to an absolute path.
If fname starts with ##/ and chroot is available, ##/ gets replaced with
the chroot path. If chroot is not available, this file name can not be
resolved, `None' is returned.
If fname is not prepended with the above prefix, and is not an existing
file, the actual file name is retrieved from the passed in string and the
search_paths directories (if any) are searched to for the file. If found -
the path to the found file is returned, `None' is returned otherwise.
Args:
fname: a string, the path to resolve.
Returns:
Absolute path to the file or None if not found.
"""
if fname.startswith('##/'):
if chroot_path:
fname = os.path.join(chroot_path, fname[3:])
else:
return None
# Search for a pathname that exists, and return it if found
if fname and not os.path.exists(fname):
for path in search_paths:
pathname = os.path.join(path, os.path.basename(fname))
if os.path.exists(pathname):
return pathname
# If not found, just return the standard, unchanged path
return fname
def ReadFile(fname):
"""Read and return the contents of a file.
Args:
fname: path to filename to read, where ## signifiies the chroot.
Returns:
data read from file, as a string.
"""
with open(Filename(fname), 'rb') as fd:
data = fd.read()
#self._out.Info("Read file '%s' size %d (%#0x)" %
#(fname, len(data), len(data)))
return data
def WriteFile(fname, data):
"""Write data into a file.
Args:
fname: path to filename to write
data: data to write to file, as a string
"""
#self._out.Info("Write file '%s' size %d (%#0x)" %
#(fname, len(data), len(data)))
with open(Filename(fname), 'wb') as fd:
fd.write(data)
|
