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import os
import re
import sys
import tempfile
import subprocess
from urllib2 import urlopen, HTTPError, URLError
ARTIFACTS_URL = "http://autobuild.buildroot.net/artefacts/"
def open_log_file(builddir, stage, logtofile=True):
"""
Open a file for logging and return its handler.
If logtofile is True, returns sys.stdout. Otherwise opens a file
with a suitable name in the build directory.
"""
if logtofile:
fhandle = open("{}-{}.log".format(builddir, stage), 'a+')
else:
fhandle = sys.stdout
return fhandle
def filepath(relpath):
return os.path.join(os.getcwd(), "support/testing", relpath)
def download(dldir, filename):
finalpath = os.path.join(dldir, filename)
if os.path.exists(finalpath):
return finalpath
if not os.path.exists(dldir):
os.makedirs(dldir)
tmpfile = tempfile.mktemp(dir=dldir)
print("Downloading to {}".format(tmpfile))
try:
url_fh = urlopen(os.path.join(ARTIFACTS_URL, filename))
with open(tmpfile, "w+") as tmpfile_fh:
tmpfile_fh.write(url_fh.read())
except (HTTPError, URLError) as err:
os.unlink(tmpfile)
raise err
print("Renaming from {} to {}".format(tmpfile, finalpath))
os.rename(tmpfile, finalpath)
return finalpath
def get_elf_arch_tag(builddir, prefix, fpath, tag):
"""
Runs the cross readelf on 'fpath', then extracts the value of tag 'tag'.
Example:
>>> get_elf_arch_tag('output', 'arm-none-linux-gnueabi-',
'bin/busybox', 'Tag_CPU_arch')
v5TEJ
>>>
"""
cmd = ["host/bin/{}-readelf".format(prefix),
"-A", os.path.join("target", fpath)]
out = subprocess.check_output(cmd, cwd=builddir, env={"LANG": "C"})
regexp = re.compile("^ {}: (.*)$".format(tag))
for line in out.splitlines():
m = regexp.match(line)
if not m:
continue
return m.group(1)
return None
def get_file_arch(builddir, prefix, fpath):
return get_elf_arch_tag(builddir, prefix, fpath, "Tag_CPU_arch")
def get_elf_prog_interpreter(builddir, prefix, fpath):
"""
Runs the cross readelf on 'fpath' to extract the program interpreter
name and returns it.
Example:
>>> get_elf_prog_interpreter('br-tests/TestExternalToolchainLinaroArm',
'arm-linux-gnueabihf',
'bin/busybox')
/lib/ld-linux-armhf.so.3
>>>
"""
cmd = ["host/bin/{}-readelf".format(prefix),
"-l", os.path.join("target", fpath)]
out = subprocess.check_output(cmd, cwd=builddir, env={"LANG": "C"})
regexp = re.compile("^ *\[Requesting program interpreter: (.*)\]$")
for line in out.splitlines():
m = regexp.match(line)
if not m:
continue
return m.group(1)
return None
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