summaryrefslogtreecommitdiff
path: root/tools/buildman/toolchain.py
blob: 5e77fed5833435ca02e17a64b7075f8a95281b0e (plain)
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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
# Copyright (c) 2012 The Chromium OS Authors.
#
# SPDX-License-Identifier:	GPL-2.0+
#

import re
import glob
from HTMLParser import HTMLParser
import os
import sys
import tempfile
import urllib2

import bsettings
import command

# Simple class to collect links from a page
class MyHTMLParser(HTMLParser):
    def __init__(self, arch):
        """Create a new parser

        After the parser runs, self.links will be set to a list of the links
        to .xz archives found in the page, and self.arch_link will be set to
        the one for the given architecture (or None if not found).

        Args:
            arch: Architecture to search for
        """
        HTMLParser.__init__(self)
        self.arch_link = None
        self.links = []
        self._match = '_%s-' % arch

    def handle_starttag(self, tag, attrs):
        if tag == 'a':
            for tag, value in attrs:
                if tag == 'href':
                    if value and value.endswith('.xz'):
                        self.links.append(value)
                        if self._match in value:
                            self.arch_link = value


class Toolchain:
    """A single toolchain

    Public members:
        gcc: Full path to C compiler
        path: Directory path containing C compiler
        cross: Cross compile string, e.g. 'arm-linux-'
        arch: Architecture of toolchain as determined from the first
                component of the filename. E.g. arm-linux-gcc becomes arm
    """
    def __init__(self, fname, test, verbose=False):
        """Create a new toolchain object.

        Args:
            fname: Filename of the gcc component
            test: True to run the toolchain to test it
            verbose: True to print out the information
        """
        self.gcc = fname
        self.path = os.path.dirname(fname)

        # Find the CROSS_COMPILE prefix to use for U-Boot. For example,
        # 'arm-linux-gnueabihf-gcc' turns into 'arm-linux-gnueabihf-'.
        basename = os.path.basename(fname)
        pos = basename.rfind('-')
        self.cross = basename[:pos + 1] if pos != -1 else ''

        # The architecture is the first part of the name
        pos = self.cross.find('-')
        self.arch = self.cross[:pos] if pos != -1 else 'sandbox'

        env = self.MakeEnvironment(False)

        # As a basic sanity check, run the C compiler with --version
        cmd = [fname, '--version']
        if test:
            result = command.RunPipe([cmd], capture=True, env=env,
                                     raise_on_error=False)
            self.ok = result.return_code == 0
            if verbose:
                print 'Tool chain test: ',
                if self.ok:
                    print 'OK'
                else:
                    print 'BAD'
                    print 'Command: ', cmd
                    print result.stdout
                    print result.stderr
        else:
            self.ok = True
        self.priority = self.GetPriority(fname)

    def GetPriority(self, fname):
        """Return the priority of the toolchain.

        Toolchains are ranked according to their suitability by their
        filename prefix.

        Args:
            fname: Filename of toolchain
        Returns:
            Priority of toolchain, 0=highest, 20=lowest.
        """
        priority_list = ['-elf', '-unknown-linux-gnu', '-linux',
            '-none-linux-gnueabi', '-uclinux', '-none-eabi',
            '-gentoo-linux-gnu', '-linux-gnueabi', '-le-linux', '-uclinux']
        for prio in range(len(priority_list)):
            if priority_list[prio] in fname:
                return prio
        return prio

    def MakeEnvironment(self, full_path):
        """Returns an environment for using the toolchain.

        Thie takes the current environment and adds CROSS_COMPILE so that
        the tool chain will operate correctly.

        Args:
            full_path: Return the full path in CROSS_COMPILE and don't set
                PATH
        """
        env = dict(os.environ)
        if full_path:
            env['CROSS_COMPILE'] = os.path.join(self.path, self.cross)
        else:
            env['CROSS_COMPILE'] = self.cross
            env['PATH'] = self.path + ':' + env['PATH']

        return env


class Toolchains:
    """Manage a list of toolchains for building U-Boot

    We select one toolchain for each architecture type

    Public members:
        toolchains: Dict of Toolchain objects, keyed by architecture name
        paths: List of paths to check for toolchains (may contain wildcards)
    """

    def __init__(self):
        self.toolchains = {}
        self.paths = []
        self._make_flags = dict(bsettings.GetItems('make-flags'))

    def GetPathList(self):
        """Get a list of available toolchain paths

        Returns:
            List of strings, each a path to a toolchain mentioned in the
            [toolchain] section of the settings file.
        """
        toolchains = bsettings.GetItems('toolchain')
        if not toolchains:
            print ('Warning: No tool chains - please add a [toolchain] section'
                 ' to your buildman config file %s. See README for details' %
                 bsettings.config_fname)

        paths = []
        for name, value in toolchains:
            if '*' in value:
                paths += glob.glob(value)
            else:
                paths.append(value)
        return paths

    def GetSettings(self):
      self.paths += self.GetPathList()

    def Add(self, fname, test=True, verbose=False):
        """Add a toolchain to our list

        We select the given toolchain as our preferred one for its
        architecture if it is a higher priority than the others.

        Args:
            fname: Filename of toolchain's gcc driver
            test: True to run the toolchain to test it
        """
        toolchain = Toolchain(fname, test, verbose)
        add_it = toolchain.ok
        if toolchain.arch in self.toolchains:
            add_it = (toolchain.priority <
                        self.toolchains[toolchain.arch].priority)
        if add_it:
            self.toolchains[toolchain.arch] = toolchain

    def ScanPath(self, path, verbose):
        """Scan a path for a valid toolchain

        Args:
            path: Path to scan
            verbose: True to print out progress information
        Returns:
            Filename of C compiler if found, else None
        """
        fnames = []
        for subdir in ['.', 'bin', 'usr/bin']:
            dirname = os.path.join(path, subdir)
            if verbose: print "      - looking in '%s'" % dirname
            for fname in glob.glob(dirname + '/*gcc'):
                if verbose: print "         - found '%s'" % fname
                fnames.append(fname)
        return fnames


    def Scan(self, verbose):
        """Scan for available toolchains and select the best for each arch.

        We look for all the toolchains we can file, figure out the
        architecture for each, and whether it works. Then we select the
        highest priority toolchain for each arch.

        Args:
            verbose: True to print out progress information
        """
        if verbose: print 'Scanning for tool chains'
        for path in self.paths:
            if verbose: print "   - scanning path '%s'" % path
            fnames = self.ScanPath(path, verbose)
            for fname in fnames:
                self.Add(fname, True, verbose)

    def List(self):
        """List out the selected toolchains for each architecture"""
        print 'List of available toolchains (%d):' % len(self.toolchains)
        if len(self.toolchains):
            for key, value in sorted(self.toolchains.iteritems()):
                print '%-10s: %s' % (key, value.gcc)
        else:
            print 'None'

    def Select(self, arch):
        """Returns the toolchain for a given architecture

        Args:
            args: Name of architecture (e.g. 'arm', 'ppc_8xx')

        returns:
            toolchain object, or None if none found
        """
        for tag, value in bsettings.GetItems('toolchain-alias'):
            if arch == tag:
                for alias in value.split():
                    if alias in self.toolchains:
                        return self.toolchains[alias]

        if not arch in self.toolchains:
            raise ValueError, ("No tool chain found for arch '%s'" % arch)
        return self.toolchains[arch]

    def ResolveReferences(self, var_dict, args):
        """Resolve variable references in a string

        This converts ${blah} within the string to the value of blah.
        This function works recursively.

        Args:
            var_dict: Dictionary containing variables and their values
            args: String containing make arguments
        Returns:
            Resolved string

        >>> bsettings.Setup()
        >>> tcs = Toolchains()
        >>> tcs.Add('fred', False)
        >>> var_dict = {'oblique' : 'OBLIQUE', 'first' : 'fi${second}rst', \
                        'second' : '2nd'}
        >>> tcs.ResolveReferences(var_dict, 'this=${oblique}_set')
        'this=OBLIQUE_set'
        >>> tcs.ResolveReferences(var_dict, 'this=${oblique}_set${first}nd')
        'this=OBLIQUE_setfi2ndrstnd'
        """
        re_var = re.compile('(\$\{[-_a-z0-9A-Z]{1,}\})')

        while True:
            m = re_var.search(args)
            if not m:
                break
            lookup = m.group(0)[2:-1]
            value = var_dict.get(lookup, '')
            args = args[:m.start(0)] + value + args[m.end(0):]
        return args

    def GetMakeArguments(self, board):
        """Returns 'make' arguments for a given board

        The flags are in a section called 'make-flags'. Flags are named
        after the target they represent, for example snapper9260=TESTING=1
        will pass TESTING=1 to make when building the snapper9260 board.

        References to other boards can be added in the string also. For
        example:

        [make-flags]
        at91-boards=ENABLE_AT91_TEST=1
        snapper9260=${at91-boards} BUILD_TAG=442
        snapper9g45=${at91-boards} BUILD_TAG=443

        This will return 'ENABLE_AT91_TEST=1 BUILD_TAG=442' for snapper9260
        and 'ENABLE_AT91_TEST=1 BUILD_TAG=443' for snapper9g45.

        A special 'target' variable is set to the board target.

        Args:
            board: Board object for the board to check.
        Returns:
            'make' flags for that board, or '' if none
        """
        self._make_flags['target'] = board.target
        arg_str = self.ResolveReferences(self._make_flags,
                           self._make_flags.get(board.target, ''))
        args = arg_str.split(' ')
        i = 0
        while i < len(args):
            if not args[i]:
                del args[i]
            else:
                i += 1
        return args

    def LocateArchUrl(self, fetch_arch):
        """Find a toolchain available online

        Look in standard places for available toolchains. At present the
        only standard place is at kernel.org.

        Args:
            arch: Architecture to look for, or 'list' for all
        Returns:
            If fetch_arch is 'list', a tuple:
                Machine architecture (e.g. x86_64)
                List of toolchains
            else
                URL containing this toolchain, if avaialble, else None
        """
        arch = command.OutputOneLine('uname', '-m')
        base = 'https://www.kernel.org/pub/tools/crosstool/files/bin'
        versions = ['4.9.0', '4.6.3', '4.6.2', '4.5.1', '4.2.4']
        links = []
        for version in versions:
            url = '%s/%s/%s/' % (base, arch, version)
            print 'Checking: %s' % url
            response = urllib2.urlopen(url)
            html = response.read()
            parser = MyHTMLParser(fetch_arch)
            parser.feed(html)
            if fetch_arch == 'list':
                links += parser.links
            elif parser.arch_link:
                return url + parser.arch_link
        if fetch_arch == 'list':
            return arch, links
        return None

    def Download(self, url):
        """Download a file to a temporary directory

        Args:
            url: URL to download
        Returns:
            Tuple:
                Temporary directory name
                Full path to the downloaded archive file in that directory,
                    or None if there was an error while downloading
        """
        print 'Downloading: %s' % url
        leaf = url.split('/')[-1]
        tmpdir = tempfile.mkdtemp('.buildman')
        response = urllib2.urlopen(url)
        fname = os.path.join(tmpdir, leaf)
        fd = open(fname, 'wb')
        meta = response.info()
        size = int(meta.getheaders('Content-Length')[0])
        done = 0
        block_size = 1 << 16
        status = ''

        # Read the file in chunks and show progress as we go
        while True:
            buffer = response.read(block_size)
            if not buffer:
                print chr(8) * (len(status) + 1), '\r',
                break

            done += len(buffer)
            fd.write(buffer)
            status = r'%10d MiB  [%3d%%]' % (done / 1024 / 1024,
                                             done * 100 / size)
            status = status + chr(8) * (len(status) + 1)
            print status,
            sys.stdout.flush()
        fd.close()
        if done != size:
            print 'Error, failed to download'
            os.remove(fname)
            fname = None
        return tmpdir, fname

    def Unpack(self, fname, dest):
        """Unpack a tar file

        Args:
            fname: Filename to unpack
            dest: Destination directory
        Returns:
            Directory name of the first entry in the archive, without the
            trailing /
        """
        stdout = command.Output('tar', 'xvfJ', fname, '-C', dest)
        return stdout.splitlines()[0][:-1]

    def TestSettingsHasPath(self, path):
        """Check if builmand will find this toolchain

        Returns:
            True if the path is in settings, False if not
        """
        paths = self.GetPathList()
        return path in paths

    def ListArchs(self):
        """List architectures with available toolchains to download"""
        host_arch, archives = self.LocateArchUrl('list')
        re_arch = re.compile('[-a-z0-9.]*_([^-]*)-.*')
        arch_set = set()
        for archive in archives:
            # Remove the host architecture from the start
            arch = re_arch.match(archive[len(host_arch):])
            if arch:
                arch_set.add(arch.group(1))
        return sorted(arch_set)

    def FetchAndInstall(self, arch):
        """Fetch and install a new toolchain

        arch:
            Architecture to fetch, or 'list' to list
        """
        # Fist get the URL for this architecture
        url = self.LocateArchUrl(arch)
        if not url:
            print ("Cannot find toolchain for arch '%s' - use 'list' to list" %
                   arch)
            return 2
        home = os.environ['HOME']
        dest = os.path.join(home, '.buildman-toolchains')
        if not os.path.exists(dest):
            os.mkdir(dest)

        # Download the tar file for this toolchain and unpack it
        tmpdir, tarfile = self.Download(url)
        if not tarfile:
            return 1
        print 'Unpacking to: %s' % dest,
        sys.stdout.flush()
        path = self.Unpack(tarfile, dest)
        os.remove(tarfile)
        os.rmdir(tmpdir)
        print

        # Check that the toolchain works
        print 'Testing'
        dirpath = os.path.join(dest, path)
        compiler_fname_list = self.ScanPath(dirpath, True)
        if not compiler_fname_list:
            print 'Could not locate C compiler - fetch failed.'
            return 1
        if len(compiler_fname_list) != 1:
            print ('Internal error, ambiguous toolchains: %s' %
                   (', '.join(compiler_fname)))
            return 1
        toolchain = Toolchain(compiler_fname_list[0], True, True)

        # Make sure that it will be found by buildman
        if not self.TestSettingsHasPath(dirpath):
            print ("Adding 'download' to config file '%s'" %
                   bsettings.config_fname)
            tools_dir = os.path.dirname(dirpath)
            bsettings.SetItem('toolchain', 'download', '%s/*' % tools_dir)
        return 0