u-boot/tools/buildman/toolchain.py
Simon Glass 2a76a64981 buildman: Correct toolchain download feature
Commit d908898 updated the ScanPath() function but not its documentation
and not all its callers.

This breaks the toolchain check after it is downloaded. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
2015-03-05 16:14:01 -07:00

484 lines
16 KiB
Python

# 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
"""
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 = ['4.6.3', '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