import os
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import re
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import sys
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import tempfile
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import subprocess
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from urllib.request import urlopen
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from urllib.error import HTTPError, URLError
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ARTIFACTS_URL = "http://autobuild.buildroot.net/artefacts/"
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BASE_DIR = os.path.realpath(os.path.join(os.path.dirname(__file__), "../../.."))
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def log_file_path(builddir, stage, logtofile=True):
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"""Return path to log file"""
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return "{}-{}.log".format(builddir, stage) if logtofile else None
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def open_log_file(builddir, stage, logtofile=True):
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"""
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Open a file for logging and return its handler.
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If logtofile is True, returns sys.stdout. Otherwise opens a file
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with a suitable name in the build directory.
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"""
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return open(log_file_path(builddir, stage, logtofile), 'a+') if logtofile else sys.stdout
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def basepath(relpath=""):
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"""Return the absolute path for a file or directory relative to the Buildroot top directory."""
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return os.path.join(BASE_DIR, relpath)
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def filepath(relpath):
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return os.path.join(BASE_DIR, "support/testing", relpath)
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def download(dldir, filename):
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finalpath = os.path.join(dldir, filename)
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if os.path.exists(finalpath):
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return finalpath
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if not os.path.exists(dldir):
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os.makedirs(dldir)
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tmpfile = tempfile.mktemp(dir=dldir)
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print("Downloading to {}".format(tmpfile))
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try:
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url_fh = urlopen(os.path.join(ARTIFACTS_URL, filename))
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with open(tmpfile, "w+b") as tmpfile_fh:
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tmpfile_fh.write(url_fh.read())
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except (HTTPError, URLError) as err:
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os.unlink(tmpfile)
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raise err
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print("Renaming from {} to {}".format(tmpfile, finalpath))
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os.rename(tmpfile, finalpath)
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return finalpath
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def run_cmd_on_host(builddir, cmd):
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"""Call subprocess.check_output and return the text output."""
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out = subprocess.check_output(cmd,
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stderr=open(os.devnull, "w"),
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cwd=builddir,
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env={"LANG": "C"},
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universal_newlines=True)
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return out
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def get_elf_arch_tag(builddir, prefix, fpath, tag):
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"""
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Runs the cross readelf on 'fpath', then extracts the value of tag 'tag'.
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Example:
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>>> get_elf_arch_tag('output', 'arm-none-linux-gnueabi-',
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'bin/busybox', 'Tag_CPU_arch')
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v5TEJ
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>>>
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"""
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cmd = ["host/bin/{}-readelf".format(prefix),
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"-A", os.path.join("target", fpath)]
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out = run_cmd_on_host(builddir, cmd)
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regexp = re.compile(r"^ {}: (.*)$".format(tag))
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for line in out.splitlines():
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m = regexp.match(line)
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if not m:
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continue
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return m.group(1)
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return None
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def get_file_arch(builddir, prefix, fpath):
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return get_elf_arch_tag(builddir, prefix, fpath, "Tag_CPU_arch")
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def get_elf_prog_interpreter(builddir, prefix, fpath):
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"""
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Runs the cross readelf on 'fpath' to extract the program interpreter
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name and returns it.
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Example:
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>>> get_elf_prog_interpreter('br-tests/TestExternalToolchainLinaroArm',
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'arm-linux-gnueabihf',
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'bin/busybox')
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/lib/ld-linux-armhf.so.3
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>>>
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"""
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cmd = ["host/bin/{}-readelf".format(prefix),
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"-l", os.path.join("target", fpath)]
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out = run_cmd_on_host(builddir, cmd)
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regexp = re.compile(r"^ *\[Requesting program interpreter: (.*)\]$")
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for line in out.splitlines():
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m = regexp.match(line)
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if not m:
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continue
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return m.group(1)
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return None
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def img_round_power2(img):
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"""
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Rounds up the size of an image file to the next power of 2
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"""
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sz = os.stat(img).st_size
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pow2 = 1
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while pow2 < sz:
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pow2 = pow2 << 1
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with open(img, 'ab') as f:
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f.truncate(pow2)
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